Application – Page 178

Progress on organotin products bis(dodecylthio)

Published by BDMAEE on 2024-06-14 | Permalink

As an important class of organometallic materials, organotin compounds, especially bis(dodecylthio)tin compounds, exhibit unique properties and a wide range of applications in a variety of fields. These compounds not only have excellent thermal stability and corrosion resistance due to the long-chain alkyl sulfur groups in their structures, but also exhibit low toxicity, good biocompatibility, and catalytic activity, and thus have attracted extensive attention from researchers in the fields of plastic stabilizers, catalysts, pesticides, and biomedical materials. The following is a brief overview of the research progress of bis(dodecylthio)tin-based products.

Application of organotin stabilisers in the plastics industry
In the plastics industry, bis(dodecylthio)tin compounds are widely used as heat stabilisers, especially in polyvinyl chloride (PVC) processing. They can effectively inhibit the degradation of PVC due to dehydrogen chloride reaction during high temperature processing or long-term use, thus extending the service life of the products. In recent years, as environmental regulations have become more stringent, researchers are working to develop low-toxicity, high-efficiency alternatives to reduce the environmental and health risks that may be associated with traditional tin heat stabilisers. Improving the ecological compatibility of compounds by adjusting the molecular design, e.g. introducing biodegradable groups, is an important direction of current research.

Innovative applications in catalysis
Bis(dodecylthio)tin compounds show great potential as Lewis acid catalysts in organic synthesis due to their unique coordination ability and catalytic properties. They can promote a variety of organic reactions, including esterification and polymerisation reactions, etc. Especially in the field of green chemistry, the search for environmentally friendly catalysts has become a hot topic. Research focuses on how to optimise their catalytic efficiency and selectivity while reducing the generation of by-products for more efficient and sustainable chemical synthesis processes.

New explorations in biomedical materials
Although organotin compounds have relatively few applications in the biomedical field, research in recent years has begun to reveal their potential in antibacterial and anti-tumour applications. Bis(dodecylthio)tin compounds have been investigated as a basis for the design of novel drugs, especially in antifungal drugs and anticancer therapies, due to their specific biological activities. By precisely modulating the structure of organotin molecules, scientists aim to develop novel drug candidates that are both effective in killing pathogens and less toxic to normal cells.

Environmental impact and sustainability
Considering the potential impacts that organotin compounds may have on the environment and ecosystems, in particular the bioaccumulation and persistence of some organotin compounds, research on their environmental behaviour and ecotoxicology is also receiving increasing attention. Scientists are endeavouring to develop more environmentally friendly alternatives and to promote the development of organotin-based products in a more sustainable direction by comprehensively evaluating the environmental impacts of these materials from production to disposal through life cycle assessment.

Conclusion
In summary, the progress of research on bis(dodecylthio)tin products shows that through continuous optimisation of molecular structure and properties, these organotin compounds are gradually overcoming environmental and safety challenges while maintaining their original advantages, and moving towards greener, more efficient and multifunctional directions. Future research will focus more on balancing environmental friendliness, biocompatibility and high performance to meet the demand for high-quality materials in different fields, while protecting the Earth’s ecological environment and promoting sustainable development.
extended reading：

DMCHA – Amine Catalysts (newtopchem.com)

Dioctyltin dilaurate (DOTDL) – Amine Catalysts (newtopchem.com)

Polycat 12 – Amine Catalysts (newtopchem.com)

N-Methylmorpholine

4-Formylmorpholine

Suppliers of Bis(dodecylthio)dimethyltin

Published by BDMAEE on 2024-06-14 | Permalink

Finding reliable suppliers of bis(dodecylthio)dimethyltin involves meticulous research of manufacturers, distributors and chemical trading platforms in the market. Below are a few key steps and recommended channels to help you effectively enquire and target suitable suppliers:

1. Use professional chemical platforms
GaiderChem.com: As a well-known chemical information and trading website, GaiderChem.com provides a wealth of supplier resources, including information on many suppliers of bis(dodecylthio)dimethyltin, such as price, specification, company reputation, etc. Users can filter suppliers according to their needs and directly ask for quotations online or contact suppliers.
2. Browse the websites of leading companies in the industry
Kramer Shanghai: Based on previous records, Kramer Shanghai offers a wide range of organotin compounds, including similar products. Visiting its official website, you can enquire about the supply of dimethyltin disulfide isooctyl acetate and other products, and make use of its sales hotline or enterprise QQ to communicate directly and get the latest supply information and quotations.
3. Alibaba Chemical Market
Alibaba has a large number of chemical suppliers, enter the keyword “bis(dodecylthio)dimethyltin”, you can find the corresponding supplier list. The platform usually displays suppliers’ credit ratings, transaction records, contact information, etc., which makes it easy for buyers to compare and choose. Remember to check the qualifications of the suppliers, such as whether they have passed the ISO quality management system certification to ensure product quality.
4. Directly contact the manufacturer
Although Hubei Dongcao Chemical Technology Co., Ltd. and Hubei Nona Technology Co., Ltd. do not directly mention bis(dodecylthio)dimethyltin, they may have production lines of related products or be able to provide customised services as professional chemical manufacturers. A direct visit to the company’s official website or enquiry by phone or email may reveal specific product information they can provide.
5. Consider customised services
If standard products do not meet specific needs, consider contacting a supplier like Xinden Chemical Materials (Shanghai) Co. Ltd. who offers a wide range of organostannic compounds, including thiomethyltin, has customised production capabilities, and may be able to produce bis(dodecylthio)dimethyltin according to your requirements.
Things to consider when making enquiries:
Verify supplier qualifications: Confirm whether the supplier has a legal business licence, safety production permit and environmental qualifications, etc.
Quality standards: Ask about product purity and test reports to ensure compliance with industry standards or specific application requirements.
Price and payment terms: Compare the offers of different suppliers and find out the minimum order quantity, payment methods and transport costs.
After-sales service: Understand the supplier’s return and exchange policy and technical support capability.
Through the above channels, you can systematically collect information, compare and select the bis(dodecylthio)dimethyltin supplier that best meets your needs. Remember to make full communication and confirmation before the transaction to ensure the smooth procurement process.

extended reading：

DMCHA – Amine Catalysts (newtopchem.com)

Dioctyltin dilaurate (DOTDL) – Amine Catalysts (newtopchem.com)

Polycat 12 – Amine Catalysts (newtopchem.com)

N-Methylmorpholine

4-Formylmorpholine

Bis(dodecylthio)organotin compounds market price analysis and influencing factors

Published by BDMAEE on 2024-06-14 | Permalink

In the field of fine chemicals and materials science, bis(dodecylthio)organostannic compounds, as an important class of functional chemicals, are subject to price fluctuations that directly affect the cost control and market strategies of downstream industries. With their unique chemical stability and catalytic activity, these compounds play a key role in various fields such as polymer stabilisers, catalysts and biocides. In this article, we will discuss the current market price status of bis(dodecylthio)organotin compounds, analyse the key factors affecting their price trends, and look into the future price trends.

Market Price Status
The specific price of bis(dodecylthio)organostannic compounds is affected by a variety of factors, including raw material costs, production technology, market demand, policies and regulations, and the international economic environment. In the current market, the price range of such compounds is relatively broad, depending on the quality, purity, brand and purchase volume, the price can range from hundreds of yuan per kilogram to thousands of yuan per kilogram. For example, specific models such as di(dodecylthio)dioctyltin have been reported to be priced at $228 per bag, but please note that prices fluctuate with market conditions and this price is for reference only.

Key Factors Affecting Prices
1. Fluctuation of raw material prices
The synthesis of organotin compounds relies on tin metal and other organic raw materials such as dodecanethiol. As a base metal, the fluctuation of the international market price of tin directly affects the production cost of organotin compounds. In addition, changes in the price of oil will also indirectly affect the cost of organic raw materials, which will be transmitted to the price of the final product.

2. Supply and demand
Market supply and demand conditions are the most basic factors determining commodity prices. As the demand for organic tin compounds grows in industries such as plastics, paints and rubber, if the supply cannot keep up in time, it will lead to price increases. On the contrary, if there is excess capacity, it may cause prices to decline. In particular, the restricted use of certain traditional organotin compounds, driven by environmental regulations, has prompted the market to seek substitutes, which will change the balance between supply and demand for specific organotin compounds.

3. Policies and regulations
The development and implementation of environmental regulations have a profound impact on the organotin compounds market. As the global focus on persistent organic pollutants (POPs) deepens, the use of some toxic organotin compounds, such as tributyltin and triphenyltin, has been restricted or banned. This has prompted manufacturers to turn to the development and production of safer organotin compounds, such as bis(dodecylthio)organotin, and regulatory adjustments have often been accompanied by cost increases, which are reflected in end-product prices.

4. Production technology and capacity
Advances in production technology can reduce costs and improve efficiency, exerting downward pressure on prices. However, the reality of large initial technology investments and high technical barriers may also lead to price increases in the short term. In addition, uneven distribution of global production capacity and high concentration of production may also exacerbate price volatility, especially if there are supply disruptions in major producing countries.

5. International trade environment
International trade policies, tariff changes and exchange rate fluctuations can affect the import and export costs of organotin compounds, which in turn affects their prices. For example, trade frictions may lead to higher raw material import costs and lower competitiveness of exported products, and price fluctuations are inevitable.

Outlook for future price trends
Looking ahead, as global environmental protection requirements continue to improve, it is expected that bis(dodecylthio)organotin compounds complying with the latest environmental standards will become more popular and demand will continue to grow. At the same time, technological innovation and optimisation of production processes will help reduce costs, but fluctuations in raw material prices, policy adjustments and uncertainty in the global economic situation will remain key variables affecting prices. Therefore, the price trend will be a dynamic and balanced process, requiring close attention to the changes in the above factors.

In conclusion, the price analysis of bis(dodecylthio)organotin compounds is a complex process that requires comprehensive consideration of a variety of factors. For the relevant enterprises, understanding the driving mechanism behind the price and adjusting production strategy and supply chain management at the right time will be the key to responding to market changes and maintaining competitiveness.

extended reading：

DMCHA – Amine Catalysts (newtopchem.com)

Dioctyltin dilaurate (DOTDL) – Amine Catalysts (newtopchem.com)

Polycat 12 – Amine Catalysts (newtopchem.com)

N-Methylmorpholine

4-Formylmorpholine

High resilience catalyst C-225

Published by BDMAEE on 2024-06-14 | Permalink

High resilience catalyst C-225 is a key material used in the preparation of polyurethane foam. Polyurethane foam is a lightweight material with excellent resilience and is widely used in mattresses, automotive seats, furniture, etc. The C-225 catalyst plays the role of a catalyst in the preparation of polyurethane foams, and its unique properties result in highly resilient foams with excellent performance.

C-225 catalyst has the following distinctive features:

Excellent Resilience: C-225 catalysts promote the formation of polyurethane foams with a high degree of resilience. This means that the prepared polyurethane foam will quickly return to its original shape after being stressed, providing excellent support and comfort.

Fast Reaction Rates: C-225 catalyst accelerates the reaction rates of polyurethane foams, shortening cycle times and increasing production efficiency. This is especially important for high volume industrial applications.

Excellent Stability: C-225 catalyst is thermally and chemically stable and remains active during the reaction process, ensuring stable and controllable foam preparation.

Highly tunable: The amount and ratio of C-225 catalyst can be adjusted according to different production needs, thus realizing precise control of foam performance to meet the requirements of various applications.

Environmentally friendly: C-225 catalyst produces fewer volatile organic compounds (VOCs) during use, with lower toxicity and risk of environmental contamination, meeting environmental requirements.

In the field of polyurethane foam preparation, C-225 catalyst has become the first choice for many manufacturers. Its excellent performance and stable quality guarantee the production efficiency and quality of polyurethane foam products, and promote the development and progress of the industry.

Although C-225 catalyst plays an important role in the preparation of polyurethane foam, it is still necessary to strictly follow the safety operation procedures to ensure the safety of employees and the environment in the process of using it. At the same time, continuous R&D and innovation to find more environmentally friendly and efficient catalysts will help drive the polyurethane foam preparation industry in a more sustainable direction.

DMCHA – Amine Catalysts (newtopchem.com)

Dioctyltin dilaurate (DOTDL) – Amine Catalysts (newtopchem.com)

Polycat 12 – Amine Catalysts (newtopchem.com)

FASCAT4100 catalyst – Amine Catalysts (newtopchem.com)

Dabco 2040/low odor amine catalyst – Amine Catalysts (newtopchem.com)

About Us – Amine Catalysts (newtopchem.com)

K-15 – Amine Catalysts (newtopchem.com)

Synthesis of low free TDI trimer – Amine Catalysts (newtopchem.com)

PC-37 – Amine Catalysts (newtopchem.com)

Dabco foaming catalyst/polyurethane foaming catalyst NE300 – Amine Catalysts (newtopchem.com)

Polyurethane Catalyst TMR-2

Published by BDMAEE on 2024-06-14 | Permalink

Polyurethane Catalyst TMR-2
Polyurethane is an important class of engineering plastics, widely used in construction, automotive, aerospace and other fields. The production of polyurethane cannot be separated from the role of catalysts. Among them, TMR-2 is a commonly used polyurethane catalyst, which plays a key role in polyurethane production.

TMR-2 catalyst has the following significant features:
Efficient catalysis: TMR-2 catalysts can efficiently promote polyurethane formation reactions and accelerate the growth of polymer chains, thus improving production efficiency and product quality.
Reaction Control: TMR-2 catalysts help to control the rate and selectivity of polyurethane reactions, ensuring a stable and controlled process, reducing the generation of undesirable products and improving product consistency and predictability.
Optimized Performance: TMR-2 catalysts optimize the physical and mechanical properties of polyurethanes, including strength, hardness, and abrasion resistance, resulting in better performance of the final product.
Low Toxicity and Pollution: TMR-2 catalyst produces fewer volatile organic compounds (VOCs) during use, resulting in lower toxicity and risk of environmental contamination, which is in line with environmental requirements.
Widely used: TMR-2 catalyst is suitable for various polyurethane production processes, including spraying, injection molding and extrusion.

In the polyurethane industry, TMR-2 catalyst has become the first choice of many manufacturers. Its excellent performance and stable quality guarantee the productivity and quality of polyurethane products, and promote the development and progress of the industry.

Although TMR-2 catalyst plays an important role in the production of polyurethane, it is still necessary to strictly follow the safety operation procedures during the use of the catalyst to ensure the safety of employees and the environment. At the same time, continuous R&D and innovation to seek more environmentally friendly and efficient catalysts will help drive the polyurethane industry in a more sustainable direction.

NT CAT PC-41

NT CAT PC-8

NT CAT A-33

NT CAT A-1

NT CAT 33L

NC CAT T

NT CAT 33LV

NT CAT ZF-10

NT CAT U28

NT CAT U26

Biodegradability Analysis of Dioctyltin Dimercaptoacetate

Published by BDMAEE on 2024-06-14 | Permalink

Dioctyltin dimercaptoacetate (DBT-DOTG), as an organotin compound, is widely used in the field of plastic additives, especially in polyethylene. Used as heat stabilizer in vinyl chloride (PVC) products. However, its biodegradability analysis is crucial to assess its environmental impact and safety, as organotin compounds generally exhibit low biodegradability, which may pose a threat to ecosystems. The following is a comprehensive analysis of the biodegradability of dioctyltin dimercaptoacetate, covering its degradation mechanism, influencing factors, environmental behavior, and potential environmental management countermeasures.

1. Degradation mechanism

The biodegradation of organotin compounds mainly depends on microbial activities, including bacteria, fungi and algae. The degradation process of dioctyltin dimercaptoacetate may involve the following steps:

Preliminary metabolism: Microorganisms may attack the bonds between tin atoms and organic ligands through oxidation or reduction reactions, initially decompose organotin compounds, and produce smaller organotin metabolites and inorganic tin ions. .
Subsequent transformation: The decomposed organotin fragments may be further degraded into smaller organic molecules by microbial enzymes until they are completely mineralized into carbon dioxide and water, while inorganic tin ions may form insoluble Precipitated or absorbed by microorganisms.
Limiting factors: The degradation of organotin compounds is affected by many factors, including microbial species, environmental conditions (such as pH, temperature, oxygen supply), the structure of organotin and the presence of pollutants, etc. .

2. Influencing factors

Microbial Diversity: Different types of microorganisms have different degradation capabilities for organotin compounds, and specific microbial communities may have higher degradation efficiency for specific types of organotin.
Environmental conditions: Appropriate temperature, pH value and sufficient oxygen supply are conducive to microbial activity, thereby promoting the biodegradation of organotin. Extreme conditions can inhibit microbial activity and reduce degradation rates.
Molecular structure: The ligand structure of organotin directly affects its bioavailability and ease of degradation. The dimercaptoacetic acid group may affect its affinity with microbial enzymes and thus the rate of degradation.
Coexisting pollutants: Other chemicals present in the environment may compete with organotin for microbial resources, or directly inhibit the degradation activity of microorganisms, such as heavy metal ions, organic pollutants, etc.

3. Environmental Behavior

Bioaccumulation and amplification: Due to the fat solubility of dioctyltin dimercaptoacetate, it easily accumulates in organisms and amplifies through the food chain, posing a potential threat to top predators.
Persistence and Diffusion: Organotin compounds have a long half-life in the environment and can accumulate in water, soil and sediments, and spread to long-distance areas through water flow and biological migration.

4. Environmental management strategies

Development of alternatives: Encourage the development and use of more biodegradable heat stabilizers to reduce reliance on organotin compounds.
Strict emission control: Strengthen environmental supervision of the plastics processing industry to ensure that the organotin content in wastewater and exhaust gas is below safety standards.
Environmental remediation technology: Use bioremediation, chemical oxidation and other technologies to remove existing organotin pollution in the environment.
Risk Assessment and Monitoring: Conduct regular environmental quality monitoring, evaluate the environmental level and bioaccumulation of organotins, and adjust management strategies in a timely manner.
Public education and awareness raising: Improve public awareness of the environmental impact of organotin compounds, and promote the rational use of resources and the correct disposal of waste.

Conclusion

Biodegradability analysis of dioctyltin dimercaptoacetate reveals its potential risk in the environment, emphasizing the effective management and management of this class of compounds The importance of control. Through the comprehensive application of scientific environmental management measures, technological innovation and public participation, we can minimize its impact on the ecosystem and promote the sustainable development of the plastic additives industry. Future research should continue to deeply explore its degradation mechanism, develop more efficient and safer alternatives, and optimize existing environmental treatment technologies.

Extended reading:

DMCHA – Amine Catalysts (newtopchem.com)

Dioctyltin dilaurate (DOTDL) – Amine Catalysts (newtopchem.com)

Polycat 12 – Amine Catalysts (newtopchem.com)

N-Methylmorpholine

4-Formylmorpholine

Environmental Impact Assessment of Dioctyltin Dimercaptoacetate

Published by BDMAEE on 2024-06-14 | Permalink

Dioctyltin dimercaptoacetate (DBT-DOTG), as a kind of organotin compound, plays an important role in plastic additives, especially as Use heat stabilizer. However, the use of any chemical requires consideration of its potential impact on the environment, and dioctyltin dimercaptoacetate is no exception. Environmental impact assessment mainly focuses on the following aspects:

1. Bioaccumulative

Organotin compounds, including dioctyltin dimercaptoacetate, present a risk of bioaccumulation due to their lipid solubility and stability. These substances may be transferred through the food chain, leading to increased concentrations in organisms at higher trophic levels, affecting the health of the ecosystem. Therefore, it is very necessary to strictly control the environmental release of such substances.

2. Toxic effects

Although dioctyltin dimercaptoacetate is less toxic than some other organotin compounds (such as tributyltin TBT), its potential toxic effects on aquatic life still need to be concerned. Research shows that organotin compounds may have adverse effects on the reproduction, growth and development of aquatic organisms such as fish and shellfish, and even lead to gender distortion. Therefore, monitoring concentrations in the environment to ensure that safety thresholds are not exceeded is a necessary measure to protect aquatic ecosystems.

3. Persistence and degradability

Organotin compounds usually have a certain degree of environmental persistence and are not prone to natural degradation. This means that once in the environment, they may remain for long periods of time, increasing their long-term impact on the environment. Assessing the environmental degradation mechanism of dioctyltin dimercaptoacetate and understanding its degradation rate under different environmental conditions is crucial for assessing its environmental risks.

4. Water pollution

Since dioctyltin dimercaptoacetate may enter water bodies through wastewater discharge during production, use and disposal, causing pollution to water quality, research on its migration, transformation and fate in the water environment is the focus of environmental impact assessment. Ensuring that industrial emissions comply with environmental standards and taking effective wastewater treatment measures can minimize their negative impact on the water environment.

5. Soil and sediment pollution

In addition to water bodies, organotin compounds may also enter soil and sediment through sedimentation, affecting soil microbial communities and sediment ecosystems. Assessing their accumulation and ecological effects in these environmental media is key to a comprehensive understanding of their environmental impacts.

6. Substitute development and risk reduction strategies

Given the potential environmental risks of organotin compounds, developing and promoting safer, biodegradable alternatives is an effective way to reduce the environmental burden. At the same time, implementing strict environmental management measures, such as restricting use, establishing recycling systems, and raising public and industry environmental awareness, are also important strategies to reduce the environmental impact of chemicals such as dioctyltin dimercaptoacetate.

In short, the environmental impact assessment of dioctyltin dimercaptoacetate is a complex process that requires comprehensive consideration of its distribution in the environment, toxicity, Degradability and impact on ecosystems in order to develop reasonable risk management measures and promote the sustainable use of chemicals.

Extended reading:

DMCHA – Amine Catalysts (newtopchem.com)

Dioctyltin dilaurate (DOTDL) – Amine Catalysts (newtopchem.com)

Polycat 12 – Amine Catalysts (newtopchem.com)

N-Methylmorpholine

4-Formylmorpholine

Application of dioctyltin dimercaptoacetate in plastic additives

Published by BDMAEE on 2024-06-14 | Permalink

Dioctyltin dimercaptoacetate (DBT-DOTG), as an efficient heat stabilizer and antioxidant, is widely used in the field of plastic additives. Especially in the processing and modification of polyvinyl chloride (PVC) and other polyolefin materials. Its unique mechanism of action and performance characteristics make it one of the key ingredients to improve the performance and extend the service life of plastic products. The following are several major applications of dioctyltin dimercaptoacetate in plastic additives:

1. Enhanced thermal stability

PVC materials are prone to dehydrochlorination reactions during processing and high-temperature use environments, resulting in material discoloration and reduced mechanical properties. Dioctyltin dimercaptoacetate can effectively capture the free radicals released during the degradation of PVC, prevent or delay this chain reaction, thereby significantly improving the thermal stability of PVC products. This is especially important for plastic products that need to undergo high-temperature processing during the production process, such as wire and cable insulation layers, plastic doors and windows for construction, etc.

2. Improved light stability and weather resistance

Because the dioctyltin dimercaptoacetate structure contains a thiol group, it can absorb and quench ultraviolet energy, reducing the damaging effect of ultraviolet rays on plastics, thereby improving the light stability and weather resistance of the product. This is of great significance for plastic products used outdoors, such as billboards, agricultural films, roofing materials, etc., which can effectively extend their outdoor service life and maintain good appearance and mechanical properties.

3. Improved transparency

In the production of transparent PVC products, dioctyltin dimercaptoacetate is a preferred additive because it can provide the necessary stability and protection while minimizing the impact on the transparency of the material. This is indispensable for products that require a high degree of transparency, such as transparent packaging materials, spectacle lenses, medical equipment, etc.

4. Processing performance optimization

The additive can also improve the processing properties of plastics, such as fluidity, mold release, etc. During processing, dioctyltin dimercaptoacetate can help materials better disperse and fuse, reduce processing defects, and improve production efficiency and product quality.

5. Eco-friendly alternatives

With increasingly stringent environmental regulations, the use of traditional lead salts and some toxic organotin stabilizers is being gradually restricted or banned. As a relatively low-toxic organotin stabilizer, dioctyltin dimercaptoacetate has become an ideal choice to replace these harmful substances and meets the market demand for environmentally friendly materials.

6. Composite Stabilizer Component

In practical applications, dioctyltin dimercaptoacetate is often used in combination with other additives such as phosphites, epoxy compounds, etc. to form a composite stabilizer system to further improve the overall performance and stability of plastic products with a synergistic effect.

In short, dioctyltin dimercaptoacetate plays an important role in the field of plastic additives due to its excellent stability and modification ability. Especially in the modern plastics industry that pursues high performance and environmental protection. However, its potential environmental impacts and human health risks also prompt researchers to continue to explore safer and more sustainable alternatives and technologies.

Extended reading:

DMCHA – Amine Catalysts (newtopchem.com)

Dioctyltin dilaurate (DOTDL) – Amine Catalysts (newtopchem.com)

Polycat 12 – Amine Catalysts (newtopchem.com)

N-Methylmorpholine

4-Formylmorpholine

Physical and chemical properties of dioctyltin dimercaptoacetate

Published by BDMAEE on 2024-06-14 | Permalink

Dibutyltin bis(isooctylthioglycolate), whose chemical formula is generally abbreviated as DBT-DOTG, is an organic tin compound that is widely used Stabilizer used in polyvinyl chloride (PVC) plastics, especially for the processing of transparent products, has a significant effect. It enables PVC products to maintain their physical and mechanical properties and extend their service life by providing good thermal stability, light stability and anti-aging properties. Below is a detailed description of some of the key physicochemical properties of dioctyltin dimercaptoacetate.

Physical properties

Appearance: Dioctyltin dimercaptoacetate is usually a light yellow to colorless oily liquid. This is due to its organic structural characteristics that allow it to remain liquid at room temperature.

Solubility: This compound has good solubility and is easily soluble in most organic solvents, such as esters, ethers, ketones, alcohols, aliphatic hydrocarbons, aromatic hydrocarbons and commonly used Plasticizer, but insoluble in water. This solubility characteristic is crucial for its use in polymer processing, allowing for uniform dispersion in the PVC matrix.

Density: Its relative density is approximately between 1.055 and 1.075 (measured at 30°C), which means it is lighter than water, helping to achieve uniform dispersion during certain processing processes .

Melting point and boiling point: Due to the fluidity of its molecular structure, dioctyltin dimercaptoacetate does not have a clear melting point, but has a wide solidification range. Its boiling point is relatively high, usually above hundreds of degrees Celsius. The specific value depends on experimental conditions and measurement methods.

Refractive index: The refractive index is between 1.490 and 1.500 (measured at 30°C). This parameter is of great significance for understanding its optical properties and its application in transparent products.

Viscosity: The viscosity of this compound is low, less than 90mPa·s (measured at 30°C), indicating that it has good fluidity and mixing properties during processing.

Chemical properties

Stability: Dioctyltin dimercaptoacetate is relatively stable at room temperature, but may decompose at high temperatures or in a strong alkaline environment. It has some stability to light and heat, but long-term exposure may still cause performance degradation.

Reactivity: The organotin part of this compound is sensitive to moisture in the air and may slowly hydrolyze, releasing free isooctyl thioglycolate. At the same time, the divalent tin ions contained in it can participate in coordination reactions and form stable complexes with a variety of ligands.

Toxicity and Environmental Impact: Although the information mentions “toxicity of toxic substances”, the specific toxicity level and environmental impact need to be determined based on the latest chemical safety data sheet (MSDS). Organotin compounds are generally considered toxic to aquatic life, and long-term exposure may have adverse effects on human health. Therefore, appropriate safety measures should be taken when using and handling to ensure compliance with environmental and occupational safety standards.

Application Features

In PVC processing, dioctyltin dimercaptoacetate is mainly used as a heat stabilizer, which can effectively inhibit adverse reactions caused by thermal degradation of PVC during processing and use, such as color changes and reduced mechanical properties. Its unique thiol group (-SH) provides excellent antioxidant and UV resistance, helping to improve the transparency and weather resistance of products. It is especially suitable for the production of high-end PVC products such as transparent bottles, plates, and sheets.

Conclusion

To sum up, dioctyltin dimercaptoacetate is an efficient heat stabilizer. Its unique physical and chemical properties make it widely used in the PVC industry. In particular, the field of transparent products shows broad application prospects. However, due to its potential environmental and health risks, increasingly strict regulations on its production and use have driven the industry towards research and development of safer and environmentally friendly alternatives. In the future, how to balance performance and sustainability will be an important topic for research in this field.

Extended reading:

DMCHA – Amine Catalysts (newtopchem.com)

Dioctyltin dilaurate (DOTDL) – Amine Catalysts (newtopchem.com)

Polycat 12 – Amine Catalysts (newtopchem.com)

N-Methylmorpholine</u>

4-Formylmorpholine

Preparation method of dioctyltin dimercaptoacetate

Published by BDMAEE on 2024-06-14 | Permalink

Dioctyltin dimercaptoacetate is an important organotin compound, which is widely used in plastic stabilizers, catalysts and other fields because of its excellent thermal properties. It has attracted much attention due to its stability and good processing performance. Its preparation method usually involves multi-step chemical reactions, and a typical synthesis process will be introduced in detail below.

Initial raw material preparation

The preparation of dioctyltin dimercaptoacetate first requires the preparation of a series of chemical raw materials, mainly including ethanol, concentrated hydrochloric acid, sodium chloride, C7-C8 fatty alcohol (such as isooctyl alcohol), metallic tin, hydrogen chloride gas, methyl acrylate , thioglycolic acid, benzene, 2-ethylisooctyl chloroacetate, ion exchange resin, toluene, carbonate, sodium thiosulfate and water. These raw materials play different roles in the synthesis process, such as providing reactive groups, adjusting the pH value of the reaction medium, and serving as catalysts or solvents.

Overview of preparation steps

1. Synthesis of dioctyltin dichloride

First, dioctyltin dichloride is prepared by reacting dioctyltin with hydrogen chloride in an appropriate solvent. This process is often carried out under heating conditions and requires good stirring to promote complete reaction. After the reaction is completed, pure dioctyltin dichloride is isolated by filtration or distillation.

2. Synthesis of isooctyl thioglycolate

Next, isooctyl thioglycolate is synthesized through a two-step reaction of esterification and thiolation. In the esterification stage, chloroacetic acid and isooctyl alcohol react under the action of a catalyst to form the corresponding ester. Subsequently, thiolation is carried out through the Bunte salt method to convert the ester into thioglycolic acid ester. The yield of the product in this step can reach 91.5%, and the purity reaches 98.5%.

3. Synthesis of bis(isooctyl thioglycolate) di-n-octyltin

The final step is to react dioctyltin dichloride with pre-synthesized isooctyl thioglycolate to form the target product dioctyltin dimercaptoacetate. This step is usually carried out in a four-neck flask equipped with an electric stirrer, constant pressure funnel, thermometer and condenser tube to ensure controllable reaction conditions. Add a suitable solvent to the reaction system and heat it at an appropriate temperature to replace the chlorine atom with the mercapto group of isooctyl thioglycolate to generate the final product.

Post-processing and purification

After completing the above reaction, the product needs to be post-processed and purified. This usually includes precipitation, filtration, washing to remove unreacted materials and by-products, and then further purification by vacuum distillation or column chromatography to obtain high purity dioctyltin dimercaptoacetate.

Safety and environmental considerations

When performing such chemical synthesis, strict laboratory safety practices and personal protective equipment must be worn, as organotin compounds and their precursors can be toxic. In addition, considering environmental protection, waste generated during the synthesis process should be properly disposed of to avoid environmental pollution.

Conclusion

The preparation of dioctyltin dimercaptoacetate is a complex chemical process involving a variety of chemical reactions and operating steps. By precisely controlling the reaction conditions and optimizing the synthesis route, the yield and purity of the product can be effectively improved to meet the demand for high-quality organotin compounds in different application fields. With the advancement of science and technology, more environmentally friendly and efficient synthesis methods are constantly being explored to meet the requirements of sustainable development.

Extended reading:

DMCHA – Amine Catalysts (newtopchem.com)

Dioctyltin dilaurate (DOTDL) – Amine Catalysts (newtopchem.com)

Polycat 12 – Amine Catalysts (newtopchem.com)

N-Methylmorpholine

4-Formylmorpholine