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Comparison between dibutyltin monooctyl maleate and other heat stabilizers

admin 7月 23rd, 2024 News

Introduction

Polyvinyl chloride (PVC) is one of the widely used plastics. The selection of heat stabilizer during its processing is crucial to prevent thermal degradation and oxidation and maintain the performance of the material. Dibutyltin monooctyl maleate (DBMS) is a kind of organotin heat stabilizer. Compared with other types of heat stabilizers, it has unique performance and application range. This article will discuss the differences between DBMS and calcium zinc, lead salt, barium zinc and composite heat stabilizers, as well as their respective characteristics and applicable scenarios.

Organotin heat stabilizer: dibutyltin monooctyl maleate (DBMS)

DBMS is known for its excellent thermal stability and transparency. It is especially suitable for PVC products with high requirements on transparency and color stability, such as films, hoses, cables, etc. Its advantages are:

High thermal stability: Effectively inhibits the formation of HCl and prevents further degradation of PVC chains.
Good transparency: Maintain the original color of PVC products, suitable for transparent or light-colored products.
No sulfide pollution: No sulfide will be introduced during processing, maintaining the purity of the product.
Lubricity: Provides slight internal lubrication effect to improve PVC melt fluidity.

Calcium zinc heat stabilizer

Calcium zinc heat stabilizers are a non-toxic, environmentally friendly alternative suitable for food contact and medical applications. Their main advantages include:

Environmentally friendly: Contains no heavy metals and complies with RoHS and REACH regulations.
Biocompatibility: Suitable for medical and food packaging fields.
Antistatic: Certain formulations provide antistatic properties.
Cost-effectiveness: Lower cost compared to organotin.

However, the thermal stability and transparency of calcium-zinc heat stabilizers are generally not as good as those of organotin, especially under high-temperature processing conditions.

Lead salt heat stabilizer

Lead salt was once a commonly used heat stabilizer in the PVC industry, with excellent thermal stability and cost-effectiveness. But the main disadvantages of lead salt are:

Environmental and Health Risks: Contains lead, which is harmful to the environment and human health.
Sulfide pollution: It is easy to cause sulfide pollution, which limits its application in transparent products.
Color Stability: May cause discoloration of the product.

Barium zinc heat stabilizer

Barium-zinc heat stabilizer combines the environmental protection properties of calcium and zinc with high thermal stability, and is an intermediate option between lead salts and organotin. Their advantages include:

Environmentally friendly: Lead-free, reducing environmental and health risks.
Better thermal stability: Better than calcium zinc, but slightly lower than organotin.
Cost: Between calcium zinc and organotin.

Composite heat stabilizer

Composite heat stabilizers combine the advantages of different types of heat stabilizers, usually containing organotin, calcium zinc or barium zinc, as well as auxiliary stabilizers such as epoxy compounds and antioxidants. Their design goals are:

Comprehensive performance: Provides higher thermal stability, processing performance and color stability.
Flexibility: Adapt formulations to different applications to meet specific needs.
Environmental adaptability: Ingredients can be adjusted according to environmental regulations to meet various market requirements.

Comparison summary

Performance comparison: Organotins such as DBMS are leading in terms of thermal stability and transparency, but the cost is higher and environmental health issues are worthy of concern.
Environmental protection comparison: Calcium zinc and barium zinc heat stabilizers are better in terms of environmental protection, but thermal stability and cost-effectiveness need to be weighed.
Application comparison: DBMS is suitable for applications with high performance requirements, while calcium zinc and barium zinc are more suitable for applications with high sensitivity to cost and environmental protection.

Conclusion

The selection of dibutyltin monooctyl maleate (DBMS) and other thermal stabilizers should be based on the requirements of the specific application, including but not limited to thermal Stability, transparency, cost, environmental protection and processing performance. As the industry attaches great importance to sustainable development, the research and development of heat stabilizers will focus more on improving performance while reducing environmental impact. In the future, more new stabilizers with high performance and low environmental impact may emerge.

The above comparison is based on existing technology and industry knowledge. With the advancement of new materials and technology in the future, the performance and market structure of heat stabilizers may change. Manufacturers and end users should continue to monitor industry trends to make the best product choices.

Extended reading:

CAS:2212-32-0 – Manufacturer of N,N-Dicyclohexylmethylamine and N,N-Dimethylcyclohexylamine – Shanghai Ohans Co., LTD

N,N-Dicyclohexylmethylamine – Manufacturer of N,N-Dicyclohexylmethylamine and N,N-Dimethylcyclohexylamine – Shanghai Ohans Co ., LTD

bismuth neodecanoate/CAS 251-964-6 – Amine Catalysts (newtopchem.com)

stannous neodecanoate catalysts – Amine Catalysts (newtopchem.com)

polyurethane tertiary amine catalyst/Dabco 2039 catalyst – Amine Catalysts (newtopchem.com)

DMCHA – morpholine

N-Methylmorpholine – morpholine

Polycat 41 catalyst CAS10294-43-5 Evonik Germany – BDMAEE

Polycat DBU catalyst CAS6674-22-2 Evonik Germany – BDMAEE

Dibutyltinoctyl esters: chemical properties and applications

admin 7月 23rd, 2024 News

Introduction

Dibutyltinoctyl ester compounds are an important class of organotin compounds that are widely used in the plastics industry, especially as heat stabilizers in polyvinyl chloride (PVC) processing. Their chemical structure and properties allow these compounds to play key roles in several industrial sectors. This article will delve into the chemical properties, synthesis routes, application fields of dibutyltinoctyl ester compounds and their impact on the environment and health.

Chemical Properties

The general structural formula of dibutyltinoctyl ester compounds can be expressed as R1R2Sn(OR3)2, where R1 and R2 usually represent butyl (Bu), and R3 represents an octyl ester group (such as isooctyl ester). These compounds are colorless to light yellow transparent liquids with good thermal and chemical stability. Their molecular structure enables them to effectively react with hydrogen chloride (HCl) in PVC, inhibiting the degradation of PVC during heating, thereby maintaining the physical properties and appearance of PVC products.

Synthetic pathway

Dibutyltin octyl ester compounds can be synthesized in a variety of ways. A common method is to react dibutyltin oxide with an octyl ester-based alcohol or acid. For example, dibutyltin oxide reacts with isooctyl thioglycolate to form bis(isooctylthioglycolate) dibutyltin. These reactions are usually carried out under specific temperature and pressure conditions, sometimes requiring the use of catalysts to increase yield and purity.

Application fields

PVC heat stabilizer: As a heat stabilizer, dibutyltinoctyl ester compounds are widely used in the processing of PVC products, especially soft PVC and products requiring high transparency. They can effectively prevent thermal degradation of PVC during processing and maintain the transparency and color stability of products.
Catalyst: In organic synthesis, these compounds can also be used as catalysts to participate in various chemical reactions, such as the curing process of polysiloxane.
Coatings and Inks: As additives, they can improve the weather resistance and chemical stability of coatings and are used in the formulation of high-end coatings and inks.

Environmental and health impacts

Although dibutyltinoctyl esters are widely used in industry, their potential effects on the environment and human health have also raised concerns. Organotin compounds, including dibutyltin, have been shown to be toxic to aquatic life and may pose risks to human health, particularly with long-term exposure. Therefore, many countries and regions have implemented regulations that limit or prohibit the use of certain organotin compounds, promoting the development of safer alternatives.

Market trends and future prospects

With the increasing global awareness of environmental protection and health and safety, the use of dibutyltinoctyl ester compounds is facing more and more restrictions . Market trends show that the industry is actively looking for equivalent but more environmentally friendly alternatives. R&D efforts are focused on developing new heat stabilizers with low toxicity and high stability to meet future industry needs and regulatory requirements.

Conclusion

Dibutyltinoctyl ester compounds occupy an important position in plastic processing and other industrial fields due to their unique chemical properties and application properties. However, their potential impact on the environment and health has prompted the industry to seek more sustainable solutions. Future research and development will be dedicated to balancing performance needs with environmental responsibility and pushing the industry in a greener direction.

The above content is based on existing knowledge and public information. Taking into account the continuous progress of science and technology, new research and applications on dibutyltinoctyl ester compounds may need to refer to new scientific literature and industry reports.

Extended reading:

CAS:2212-32-0 – Manufacturer of N,N-Dicyclohexylmethylamine and N,N-Dimethylcyclohexylamine – Shanghai Ohans Co., LTD

N,N-Dicyclohexylmethylamine – Manufacturer of N,N-Dicyclohexylmethylamine and N,N-Dimethylcyclohexylamine – Shanghai Ohans Co ., LTD

bismuth neodecanoate/CAS 251-964-6 – Amine Catalysts (newtopchem.com)

stannous neodecanoate catalysts – Amine Catalysts (newtopchem.com)

polyurethane tertiary amine catalyst/Dabco 2039 catalyst – Amine Catalysts (newtopchem.com)

DMCHA – morpholine

N-Methylmorpholine – morpholine

Polycat 41 catalyst CAS10294-43-5 Evonik Germany – BDMAEE

Polycat DBU catalyst CAS6674-22-2 Evonik Germany – BDMAEE

Application of tetramethylguanidine in polyurethane catalysis

admin 7月 23rd, 2024 News

Tetramethylguanidine (TMG for short), CAS number 80-70-6, is an important organic compound. Known for its strong alkalinity. It plays a versatile role in the chemical industry, especially in the production process of polyurethane (PU) foam, showing excellent performance as an efficient catalyst. This article will discuss in detail the mechanism, advantages and applications of tetramethylguanidine as a polyurethane catalyst in modern industry.

Introduction to polyurethane foam

Polyurethane is a type of polymer material widely used in the automotive, furniture, construction and packaging industries. PU foam is popular for its excellent thermal insulation, sound insulation and cushioning properties. Its production involves the reaction of isocyanate and polyol to form a urethane chain. This process usually requires a catalyst to accelerate the reaction rate and improve production efficiency and product quality.

The catalytic effect of tetramethylguanidine

Mechanism of action

Tetramethylguanidine is used as a catalyst in the production of polyurethane foam. Its main function is to promote the reaction between isocyanate and polyol. Specifically, TMG enhances the nucleophilicity of the isocyanate group by providing additional proton-accepting sites, thereby accelerating the addition reaction between isocyanate and hydroxyl groups to form urethane chains. In addition, TMG can also promote the self-polymerization reaction of NCO groups to generate urea groups and urethane groups, further enriching the polymer network structure.

Catalytic Advantages

High efficiency: Tetramethylguanidine has extremely high catalytic activity. Adding a small amount can significantly speed up the reaction rate, reduce reaction time, and improve production efficiency.
Selectivity: TMG shows good selectivity during the catalytic process, helping to control the molecular structure of the product and ensuring the uniformity and stability of PU foam.
Environmentally friendly: Compared with traditional metal catalysts, tetramethylguanidine produces fewer by-products during the catalytic process, is easy to handle, and has less impact on the environment.
Cost-Effectiveness: Although tetramethylguanidine itself is more expensive, due to its high efficiency, only a small amount is required for actual use, which can reduce production costs overall.

Application cases and prospects

In the production of polyurethane foam, the introduction of tetramethylguanidine greatly improves the flexibility of the process and the quality of the product. For example, products such as car seats, mattresses, and sound insulation materials use TMG-catalyzed PU foam to not only enhance comfort and durability, but also improve overall environmental performance.

With the growing demand for environmentally friendly and high-performance materials, tetramethylguanidine has broad application prospects as a catalyst in the production of polyurethane foam. R&D personnel are working to develop more efficient and environmentally friendly catalyst systems to meet future market needs. At the same time, by finely regulating the use of catalysts, the physical properties of the foam, such as hardness, elasticity, density, etc., can be further optimized to adapt to more diverse product design requirements.

Conclusion

Tetramethylguanidine, as a catalyst in the production of polyurethane foam, has become an important force in promoting the development of the polyurethane industry due to its high efficiency, selectivity and environmentally friendly characteristics. With the advancement of technology and changes in market demand, the application of tetramethylguanidine in PU foam and other related fields will continue to expand, making greater contributions to industrial production and environmental protection.

In short, tetramethylguanidine is not only a simple chemical, but also a bridge connecting chemical theory and industrial practice. Its existence promotes Technical innovation and sustainable development of the polyurethane industry. In the future, with the continuous advancement of new material science, tetramethylguanidine and its similar catalysts will play an important role in a wider range of fields.

Extended reading:

N-Ethylcyclohexylamine – Manufacturer of N,N-Dicyclohexylmethylamine and N,N-Dimethylcyclohexylamine – Shanghai Ohans Co., LTD

CAS 2273-43-0/monobutyltin oxide/Butyltin oxide – Manufacturer of N,N-Dicyclohexylmethylamine and N,N-Dimethylcyclohexylamine – Shanghai Ohans Co., LTD

T120 1185-81-5 di(dodecylthio) dibutyltin – Amine Catalysts (newtopchem.com)

DABCO 1027/foaming retarder – Amine Catalysts (newtopchem.com)

DBU – Amine Catalysts (newtopchem.com)

bismuth neodecanoate – morpholine

DMCHA – morpholine

amine catalyst Dabco 8154 – BDMAEE

2-ethylhexanoic-acid-potassium-CAS-3164-85- 0-Dabco-K-15.pdf (bdmaee.net)

Dabco BL-11 catalyst CAS3033-62- 3 Evonik Germany – BDMAEE

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