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Application and performance optimization of bismuth isooctanoate in the preparation of polyurethane elastomers

admin 9月 26th, 2024 News

Application and performance optimization of bismuth isooctanoate in the preparation of polyurethane elastomer

Introduction

Polyurethane elastomers are widely used in many fields due to their excellent mechanical properties, wear resistance, oil resistance and chemical resistance. Bismuth neodecanoate, as an efficient catalyst, plays an important role in the preparation of polyurethane elastomers. This article will discuss the application and performance optimization of bismuth isooctanoate in the preparation of polyurethane elastomers, aiming to provide a reference for researchers and enterprises to improve the performance and production efficiency of polyurethane elastomers.

1. Basic characteristics of bismuth isooctanoate

Chemical Properties
- Molecular formula: C22H42BiO2
- Structure: Bismuth isooctanoate is an organic bismuth compound containing two isooctanoic acid groups and one bismuth atom.
- Solubility: Soluble in most organic solvents, insoluble in water.
- Melting point: about 100°C
- Boiling point: about 300°C
Catalytic Performance
- High efficiency: Bismuth isooctanoate has high catalytic performance and can significantly accelerate the reaction between isocyanate and polyol.
- Selectivity: Bismuth isooctanoate has high selectivity for different reaction types and can effectively control the rate and direction of the reaction.
- Stability: Bismuth isooctanoate has good stability under high temperature and acidic environment and is not easy to decompose.
Environmentally Friendly
- Low toxicity: Bismuth isooctanoate has relatively low toxicity and has little impact on the environment and human health.
- Biodegradability: Bismuth isooctanoate has good biodegradability and has less impact on the environment.

2. Application of bismuth isooctanoate in the preparation of polyurethane elastomer

Catalytic Mechanism
- Accelerated reaction: Bismuth isocyanate can significantly accelerate the reaction between isocyanate and polyol and promote the formation of polyurethane.
- Control reaction: Bismuth isooctanoate can effectively control the rate and direction of the reaction, making the reaction more uniform and controllable.
- Improve performance: Bismuth isooctanoate can improve the mechanical properties, thermal stability and weather resistance of polyurethane elastomers.
Specific applications
- Sole material: In the production of sole materials, bismuth isooctanoate can significantly improve the elasticity and wear resistance of the material, and is suitable for sports shoes, casual shoes and other fields.
- Automotive parts: In the production of auto parts, bismuth isooctanoate can improve the rigidity and oil resistance of the material, and is suitable for seals, shock absorbers and other fields.
- Industrial products: In the production of industrial products, bismuth isooctanoate can improve the chemical resistance and high temperature resistance of the material, and is suitable for conveyor belts, rollers and other fields.

3. Performance optimization of bismuth isooctanoate in the preparation of polyurethane elastomer

Optimization of catalyst dosage
- Experimental design: Optimize the dosage of bismuth isooctanoate through orthogonal experiments or response surface methods to find better catalytic effects.
- Experimental results: Research shows that an appropriate amount of bismuth isooctanoate can significantly improve the mechanical properties and processing properties of polyurethane elastomers, but excessive use can cause the material to become brittle.
Optimization of reaction conditions
- Temperature: Appropriately increasing the reaction temperature can accelerate the reaction rate, but too high a temperature will lead to the occurrence of side reactions.
- Time: Appropriate reaction time can ensure complete reaction, but too long time will increase energy consumption.
- Pressure: Appropriate pressure can improve the uniformity and stability of the reaction, but too high a pressure will put a burden on the equipment.
Optimization of raw material selection
- Isocyanate: Choosing different types of isocyanates (such as TDI, MDI, etc.) can adjust the properties of polyurethane elastomers.
- Polyols: Choosing different types of polyols (such as polyether polyols, polyester polyols, etc.) can adjust the flexibility and chemical resistance of polyurethane elastomers.
- Additives: Adding appropriate amounts of plasticizers, antioxidants, UV absorbers, etc. can further improve the performance of polyurethane elastomers.
Processing process optimization
- Mixing process: By optimizing the mixing process, such as mixing temperature, mixing time and mixing sequence, the uniformity and stability of the material can be improved.
- Molding process: By optimizing the molding process, such as injection molding, extrusion molding and compression molding, the dimensional stability and surface quality of the material can be improved.
- Post-processing processes: Material properties can be further improved by optimizing post-processing processes such as vulcanization, heat treatment and cooling.

4. Case analysis

Sole material??
- Case Background: A shoe material manufacturer uses bismuth isooctanoate as a catalyst when producing high-performance sole materials.
- Experimental design: Optimize the dosage, reaction temperature and time of bismuth isooctanoate through orthogonal experiments.
- Experimental results: The optimized sole material has higher elasticity and wear resistance, and has a longer service life.
- Customer feedback: Users reported that the sole material has superior performance and high comfort, and the market response has been good.
Auto Parts
- Case Background: An auto parts manufacturer used bismuth isooctanoate as a catalyst when producing high-performance seals.
- Experimental design: Use response surface methodology to optimize the dosage, reaction temperature and time of bismuth isooctanoate.
- Experimental results: The optimized seal has higher rigidity and oil resistance, and has a longer service life.
- Customer feedback: Users reported that the seal has superior performance, good sealing effect, and good market response.
Industrial products
- Case Background: An industrial product manufacturer used bismuth isooctanoate as a catalyst when producing high-performance conveyor belts.
- Experimental design: Optimize the dosage, reaction temperature and time of bismuth isooctanoate through orthogonal experiments.
- Experimental results: The optimized conveyor belt has higher chemical resistance and high temperature resistance and extended service life.
- Customer feedback: Users reported that the conveyor belt has superior performance, stable operation, and good market response.

5. Conclusions and suggestions

Through a comprehensive analysis of the application and performance optimization of bismuth isooctanoate in the preparation of polyurethane elastomers, we draw the following conclusions:

Application effect: Bismuth isooctanoate has a significant catalytic effect in the preparation of polyurethane elastomer, and can significantly improve the mechanical properties, thermal stability and weather resistance of the material.
Performance optimization: By optimizing the catalyst dosage, reaction conditions, raw material selection and processing technology, the performance and production efficiency of polyurethane elastomer can be further improved.
Environmental friendliness: The low toxicity and biodegradability of bismuth isooctanoate give it obvious advantages in environmental protection.

Future research directions will pay more attention to the development of new efficient and environmentally friendly catalysts to reduce the impact on the environment. In addition, by further optimizing the production process and process parameters, the performance and market competitiveness of polyurethane elastomers can be further improved.

6. Suggestions

Increase R&D investment: Enterprises should increase R&D investment in efficient, environmentally friendly new catalysts to improve the competitiveness of their products.
Strengthen environmental awareness: Enterprises should actively respond to environmental protection policies, develop environmentally friendly products, and reduce their impact on the environment.
Technical training: Provide technical training to technical personnel in advanced technologies and processes to ensure that they master new research results and application technologies.
International Cooperation: Strengthen cooperation with international enterprises and research institutions, share technology and experience, and improve the level of global chemicals management.

Extended reading:
DABCO MP608/Delayed equilibrium catalyst

TEDA-L33B/DABCO POLYCAT/Gel catalyst

Addocat 106/TEDA-L33B/DABCO POLYCAT

3-morpholinopropylamine

Toyocat NP catalyst Tosoh

Toyocat ETS Foaming catalyst Tosoh

Bismuth isooctanoate in sealants and adhesives and its impact on performance

admin 9月 26th, 2024 News

Applications of bismuth isooctanoate in sealants and adhesives and its impact on performance

Introduction

With the continuous development of industrial technology, sealants and adhesives have been widely used in construction, automobile manufacturing, aerospace and other fields. Not only can they effectively connect different materials, they can also provide multiple functions such as waterproofing, dustproofing, and sound insulation. In order to meet the needs of different application scenarios, researchers continue to explore new additives to improve the performance of sealants and adhesives. Among them, bismuth isooctanoate, as a highly efficient catalyst, has shown significant advantages in increasing the curing speed and enhancing the bonding strength, and has become one of the hot spots of research in recent years.

Basic properties of bismuth isooctanoate

Bismuth Neodecanoate is an organic bismuth compound with the chemical formula Bi(C8H15O2)3. It is a colorless or light yellow transparent liquid, has good thermal and chemical stability, is not volatile, and has low toxicity. These properties make bismuth isooctanoate excellent in the processing of a variety of materials, especially in the curing process of polymer materials such as polyurethane (PU) and epoxy resin (EP). It is particularly widely used as a catalyst.

The mechanism of action of bismuth isooctanoate in sealants and adhesives

In sealants and adhesives, bismuth isooctanoate mainly works in the following ways:

Promote curing reaction: Bismuth isooctanoate can accelerate the reaction between polyurethane prepolymer and water, isocyanate and polyol, thereby shortening curing time and improving production efficiency. In epoxy resin systems, bismuth isooctanoate can also effectively catalyze the cross-linking reaction between epoxy groups and amine curing agents, speeding up the curing process.
Improve mechanical properties: Adding an appropriate amount of bismuth isooctanoate can improve the mechanical strength of sealants and adhesives, including tensile strength, shear strength and peel strength. This is mainly because bismuth isooctanoate promotes the formation of a more uniform cross-linked network, making the internal structure of the material denser, thereby enhancing the overall mechanical properties.
Improve weather resistance: Bismuth isooctanoate also has certain antioxidant and UV resistance, which can delay the aging process of sealants and adhesives to a certain extent and extend their service life. This is especially important for sealants and adhesives used outdoors.
Reducing VOC emissions: Compared with traditional tin-based catalysts, bismuth isooctanoate produces less volatile organic compounds (VOCs) during use, helping to reduce environmental pollution and comply with The development trend of green and environmental protection.

Specific effects of bismuth isooctanoate on the properties of sealants and adhesives

1. Curing speed

Studies have shown that there is a positive correlation between the amount of bismuth isooctanoate and the curing speed. An appropriate amount of bismuth isooctanoate can significantly shorten the curing time and improve production efficiency. For example, adding 0.1% to 0.5% (mass fraction) bismuth isooctanoate to polyurethane sealant can shorten the curing time from the original 24 hours to less than 6 hours. However, excessive bismuth isooctanoate will cause too fast curing and affect the fluidity and construction performance of the material, so its dosage needs to be strictly controlled.

2. Bonding strength

Bismuth isooctanoate can significantly improve the bonding strength of sealants and adhesives. Experimental results show that the shear strength of polyurethane adhesives containing 0.2% bismuth isooctanoate on stainless steel and glass substrates increased by 20% and 30% respectively. In addition, bismuth isooctanoate can also enhance the adhesive’s adhesion to difficult-to-stick materials such as plastics and rubber, broadening its application scope.

3. Weather resistance

The addition of bismuth isooctanoate can significantly improve the weather resistance of sealants and adhesives. After accelerated aging tests, it was found that the performance attenuation rate of samples containing bismuth isooctanoate in harsh environments such as high temperature, high humidity, and strong ultraviolet rays was significantly lower than that of the control group without bismuth isooctanoate. This shows that bismuth isooctanoate inhibits the aging process of the material to a certain extent and extends its service life.

4. VOC emissions

Environmental protection is an important direction for the development of modern industry, and bismuth isooctanoate also performs well in this aspect. Compared with traditional tin-based catalysts, the use of bismuth isooctanoate can significantly reduce VOC emissions. According to testing data, sealants and adhesives containing bismuth isooctanoate reduce VOC emissions by approximately 50% during the curing process, which is of great significance for improving the working environment and protecting the ecological environment.

Application cases

1. Automobile manufacturing industry

In automobile manufacturing, sealants and adhesives are widely used in body sealing, windshield fixing, and interior parts bonding. A well-known automobile manufacturer introduced a polyurethane sealant containing bismuth isooctanoate into its production line. The results show that the sealant not only cures quickly, but also has high bonding strength and excellent weather resistance, significantly improving the sealing and sealing properties of the entire vehicle. Security.

2. Construction industry

There is a huge demand for sealants and adhesives in the construction sector, especially in large-scale engineering projects such as high-rise buildings, bridges, and tunnels. A construction engineering company used an epoxy resin adhesive containing bismuth isooctanoate in its project and found that the adhesive still maintained good performance when exposed to outdoor environments for a long time, greatly reducing maintenance costs and extending The service life of the building.

3. Electronic products

Electronic products have extremely demanding requirements for sealants and adhesives. They not only need good electrical insulation properties, but also have high heat resistance and chemical resistance. An electronics company developed a special adhesive containing bismuth isooctanoate to fix sensitive components on circuit boards. Experiments have proven that the adhesive still performs well in high temperature and high humidity environments, ensuring the stable operation of electronic products.

Conclusion

In summary, bismuth isooctanoate, as a highly efficient catalyst, shows significant advantages in sealants and adhesives. It can not only accelerate the curing reaction and improve production efficiency, but also significantly improve the mechanical properties, weather resistance and environmental protection performance of the material. In the future, with the deepening of research and technological advancement, the application of bismuth isooctanoate in the field of sealants and adhesives will be more extensive, providing stronger support for the development of various industries.

Extended reading:
DABCO MP608/Delayed equilibrium catalyst

TEDA-L33B/DABCO POLYCAT/Gel catalyst

Addocat 106/TEDA-L33B/DABCO POLYCAT

3-morpholinopropylamine

Toyocat NP catalyst Tosoh

Toyocat ETS Foaming catalyst Tosoh

Application examples of bismuth isooctanoate as metal catalyst in chemical industry

admin 9月 26th, 2024 News

Application examples of bismuth isooctanoate as a metal catalyst in the chemical industry

Introduction

Bismuth Neodecanoate, as an important organometallic catalyst, has been widely used in the chemical industry because of its unique physical and chemical properties. This article will introduce in detail the application examples of bismuth isooctanoate in different chemical industry fields, and explore its important role and advantages in catalytic reactions.

Basic properties of bismuth isooctanoate

Bismuth isooctanoate is an organic bismuth compound with the chemical formula Bi(C8H15O2)3. It is a colorless or light yellow transparent liquid, has good thermal and chemical stability, is not volatile, and has low toxicity. These properties make it excellent in a variety of chemical reactions, especially in catalytic reactions, where it can significantly increase reaction rates and selectivity.

Application of bismuth isooctanoate in polymer synthesis

1. Polyurethane (PU) synthesis

Polyurethane is an important polymer material widely used in coatings, adhesives, foams and other fields. In the synthesis process of polyurethane, bismuth isooctanoate serves as a catalyst, which can significantly accelerate the reaction between isocyanate and polyol, increase the reaction rate and the molecular weight of the product. Specific application examples are as follows:

Accelerate the curing reaction: Adding 0.1%~0.5% (mass fraction) bismuth isooctanoate to polyurethane coatings can significantly shorten the curing time from the original 24 hours to less than 6 hours . This not only increases production efficiency, but also improves the mechanical properties and weather resistance of the coating.
Improve product performance: Bismuth isooctanoate can also improve the mechanical properties of polyurethane materials, such as tensile strength, shear strength and peel strength. Experimental results show that the shear strength of polyurethane adhesives containing 0.2% bismuth isooctanoate on stainless steel and glass substrates increased by 20% and 30% respectively.

2. Epoxy resin (EP) curing

Epoxy resin is a high-performance thermosetting resin that is widely used in electronic packaging, composite materials, anti-corrosion coatings and other fields. During the curing process of epoxy resin, bismuth isooctanoate serves as a catalyst, which can significantly accelerate the cross-linking reaction between epoxy groups and amine curing agents, improving the curing speed and product performance. Specific application examples are as follows:

Shorten the curing time: Adding 0.1%~0.3% (mass fraction) of bismuth isooctanoate to epoxy resin electronic packaging materials can significantly shorten the curing time from the original 12 hours to within 4 hours. This not only increases production efficiency, but also improves the electrical and mechanical properties of the packaging materials.
Improve heat resistance: Bismuth isooctanoate can also improve the heat resistance of epoxy resin, allowing it to maintain good performance in high temperature environments. Experimental results show that the mechanical and electrical properties of epoxy resin containing 0.2% bismuth isooctanoate did not significantly decrease after continuous use for 1,000 hours at 200°C.

Application of bismuth isooctanoate in organic synthesis

1. Dehydration reaction of alcohol

In organic synthesis, the dehydration reaction of alcohol is an important step and is often used to prepare alkenes and ether compounds. As a catalyst, bismuth isooctanoate can significantly improve the dehydration reaction rate and selectivity of alcohol. Specific application examples are as follows:

Increase the reaction rate: In the reaction of dehydrating ethanol to prepare ethylene, adding 0.5% (mass fraction) bismuth isooctanoate can significantly increase the reaction rate and allow the reaction to proceed at a lower temperature. Reduce the occurrence of side reactions.
Improve selectivity: Bismuth isooctanoate can also improve the selectivity of alcohol dehydration reaction and reduce the formation of by-products. Experimental results show that in a reaction system containing bismuth isooctanoate, the selectivity of ethanol dehydration to ethylene reaches more than 95%.

2. Esterification reaction

Esterification reaction is a common reaction type in organic synthesis and is often used to prepare various ester compounds. Bismuth isooctanoate serves as a catalyst and can significantly increase the rate and yield of the esterification reaction. Specific application examples are as follows:

Increase the reaction rate: In the esterification reaction of acetic acid and ethanol, adding 0.3% (mass fraction) bismuth isooctanoate can significantly increase the reaction rate and make the reaction complete in a shorter time. Finish.
Improving yield: Bismuth isooctanoate can also increase the yield of esterification reaction and reduce the formation of by-products. Experimental results show that in the reaction system containing bismuth isooctanoate, the yield of ethyl acetate reaches more than 90%.

Application of bismuth isooctanoate in fine chemicals

1. Synthesis of pharmaceutical intermediates

In the synthesis of pharmaceutical intermediates, bismuth isooctanoate serves as a catalyst and can significantly increase the rate and selectivity of the reaction. Specific application examples are as follows:

Increase the reaction rate: In the synthesis reaction of certain drug intermediates, adding 0.1%~0.5% (mass fraction) bismuth isooctanoate can significantly increase the reaction rate and make the reaction faster. Completed in a short time.
Improve selectivity: Bismuth isooctanoate can also improve the selectivity of the reaction, reduce the formation of by-products, and improve the purity of the target product. Experimental results show that in the reaction system containing bismuth isooctanoate, the purity of the target product reaches more than 98%.

2. Flavor synthesis

In spicesIn the synthesis, bismuth isooctanoate is used as a catalyst, which can significantly improve the rate and selectivity of the reaction. Specific application examples are as follows:

Improving the reaction rate: In the synthesis reaction of certain fragrance compounds, adding 0.1%~0.5% (mass fraction) of bismuth isooctanoate can significantly increase the reaction rate and make the reaction shorter. completed within the time limit.
Improve selectivity: Bismuth isooctanoate can also improve the selectivity of the reaction, reduce the formation of by-products, and improve the purity of the target product. Experimental results show that in the reaction system containing bismuth isooctanoate, the purity of the target spice reaches more than 95%.

Applications of bismuth isooctanoate in the field of environmental protection

1. Waste gas treatment

In exhaust gas treatment, bismuth isooctanoate serves as a catalyst and can significantly improve the degradation efficiency of organic pollutants in exhaust gas. Specific application examples are as follows:

Improve degradation efficiency: When treating waste gas containing VOCs (volatile organic compounds), adding 0.1%~0.5% (mass fraction) of bismuth isooctanoate can significantly improve the degradation efficiency of VOCs. , reduce pollutant emissions.
Reducing energy consumption: Bismuth isooctanoate can also reduce the energy consumption of waste gas treatment, allowing the reaction to proceed at a lower temperature, reducing energy consumption. Experimental results show that in the reaction system containing bismuth isooctanoate, the degradation efficiency of VOCs reaches more than 90%.

2. Wastewater treatment

In wastewater treatment, bismuth isooctanoate serves as a catalyst and can significantly improve the degradation efficiency of organic pollutants in wastewater. Specific application examples are as follows:

Improve degradation efficiency: When treating wastewater containing organic pollutants, adding 0.1%~0.5% (mass fraction) of bismuth isooctanoate can significantly improve the degradation efficiency of organic pollutants and reduce Discharge of pollutants.
Reducing energy consumption: Bismuth isooctanoate can also reduce the energy consumption of wastewater treatment, allowing the reaction to proceed at a lower temperature, reducing energy consumption. Experimental results show that in the reaction system containing bismuth isooctanoate, the degradation efficiency of organic pollutants reaches more than 90%.

Conclusion

In summary, bismuth isooctanoate, as an efficient metal catalyst, has shown broad application prospects in the chemical industry. It can not only significantly increase reaction rate and selectivity in the fields of polymer synthesis, organic synthesis, fine chemicals and environmental protection, but also improve product performance and environmental performance. In the future, with the deepening of research and technological advancement, the application of bismuth isooctanoate in the chemical industry will be more extensive, providing stronger support for the sustainable development of various industries.

Extended reading:
DABCO MP608/Delayed equilibrium catalyst

TEDA-L33B/DABCO POLYCAT/Gel catalyst

Addocat 106/TEDA-L33B/DABCO POLYCAT

3-morpholinopropylamine

Toyocat NP catalyst Tosoh

Toyocat ETS Foaming catalyst Tosoh

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