News Details
Epoxy resin compound flame retardant
2017-11-26 22:16:30
Epoxy resin compound flame retardant
In the modern flame retardant technology, epoxy resin composite flame retardant is an important aspect. The compounding technology of flame retardants contains two meanings: one is the compounding of different flame retardants; two, the coordination of flame retardants with different matrixes and different plastic additives.
Some flame retardants are only suitable for a certain matrix resin, therefore, different matrix resins should pay attention to the selection of suitable flame retardant elements. The epoxy resin compound flame retardant system has many kinds of flame retardant characteristics, and the synergistic effect of different epoxy resin composite flame retardants opens up a broad prospect for the flame retardant of synthetic materials.
The composition of flame retardants can be carried out in organic, inorganic and their interactions. The combination of organic and inorganic flame retardant used more widely, such as silicon phosphorus flame retardant compound system, this kind of complex system with organic flame retardant and high efficient inorganic flame retardant low smoke, non-toxic, can effectively reduce the cost and reduce the amount of inorganic flame retardant materials, improve the function of.
Has the features of flame retardant system, there may be a high flame retardant has development prospects: (1) flame retardant catalysis; (2) inhibition of oxidation reaction of condensed phase; (3), gas phase flame retardant effect; (4) the formation of coke layer effectively or other elements (such as silicon containing flame retardant, phosphorus etc. flame retardant elements of coke layer). Phosphorus silicon synergistic flame retardant has three characteristics, (1), (2) and (4). Therefore, phosphorus silicon synergistic flame retardant is one of the important directions of the development of flame retardant technology in the future.
The resin LOI increased from 23% to 28.5%, that of flame retardant epoxy resin modified by the system are well improved phosphorus epoxy resin to promote the generation of resin carbon layer through the acid induced dehydrogenation reaction mechanism, in the high temperature region, the formation of silica in the epoxy resin protective layer in silicon the surface of the specimen, inhibit the thermal oxidative degradation of carbon layer has been generated, prevent the loss of quality of coking carbon.
Using sol-gel method, some scholars by bisphenol A diglycidyl ether type epoxy resin (DGEBA) and four ethoxy silane (TEOS) nano composite epoxy resin was prepared in silicon phosphorus as one of the cross-linked network elements in phosphorus silicon hybrid materials, improve the flame retardancy of epoxy resin.
The combustion experiment showed that the charring rate of pure epoxy resin was 14.8% at 800, while the rate of carbon conversion of modified epoxy resin was 31%; the LOI of pure epoxy resin was 24%, and that of modified epoxy resin was 32%. It is worth mentioning that the epoxy resin containing the P-C and P-O keys in the process of thermal degradation, crosslinking is weak, susceptible to shear chain fracture, the modified epoxy resin thermal stability at low temperature and high temperature are very different, the pure epoxy resin 10% weight loss temperature of 399 DEG C however, the modified epoxy resin 10% weight loss temperature of 313 degrees, and 400 degrees in before the char yield is lower than the pure resin.
Tris(2-chloroisopropyl)Phosphate(TCPP)
Tris(2-chloroisopropyl)Phosphate(Flame retardant TCPP) is a colorless or yellowish oily liquid. It is soluble in benzene, alcohol, carbon tetrachloride and other organic solvents, but insoluble in water and aliphatic hydrocarbons. Its relative density is 1.27-1.31, refractive index is 1.4916 ( 21.5 ), viscosity is 58mm2 / S, chlorine content is 32.8%, and phosphorus content is 9.5%. As the molecule contains phosphorus and chlorine element simultaneously, its flame retardant properties is significant, as well as the plasticization, damp-proof, antistatic effects and so on. Tris(2-chloropropyl) phosphate (TCPP) is an additive flame retardant.
The product is used for the soft / hard polyurethane foam, with thermal and hydrolytic stability good, especially suitable for ASTME84 (Level 11) foam, with low viscosity unsaturated polyester resin in low temperature application and phenolic plastics at. This product is also used to grab the foam sealant and sheet production. For polyvinyl chloride, polystyrene, phenolic resin, acrylic resin and rubber, coating, flame retardant, also used for soft and hard polyurethane foam, epoxy resin, polystyrene, cellulose acetate, ethyl cellulose tree and phenolic plastics, polyvinyl acetate and gun type foam sealant production. Particularly recommended for rigid polyurethane foam has excellent thermal and hydrolytic stability is particularly suitable for ASTM84 (II), compound for polyurethane foam and unsaturated resin and phenolic plastics.
With the increase of temperature, the modified epoxy resin showed better thermal stability. The white combustion residue produced by siloxane [19] during combustion can form a composite inorganic layer with silica particles and carbonized material, which plays a dual barrier, obstructing the passage between combustible gas and flame melting zone, and protecting the polymer from the thermal radiation generated by the flame.
Hsiue and collaborators of the organic and inorganic nano hybrid silicon containing epoxy resin materials were prepared by in-situ sol-gel method, the glass transition temperature of the hybrid epoxy resin increased with the increase of silicon content, the synergistic effect between phosphorus and silicon makes the flame retardant properties of epoxy resin has been greatly improved, while the content of phosphorus and silicon respectively. 4.35% and 15.63%, the material of LOI was improved by the unmodified before 26% to 44.5% after treatment.
Epoxy resin has many prominent characteristics, such as good thermal stability, insulation, adhesion, good mechanical properties, excellent process performance and good performance, widely used in electronic components, bonding package and printed circuit board (PWBs) production etc.. The traditional flame retardant method of epoxy resin [8] is by adding bromine compounds and antimony oxide, they will have different negative effects on the environment.
Many effective and new flame retardants have been developed by studying the mechanism of flame retardants. The development trend of flame retardant research and development in recent years, we can see its development trend:
(1) environmental protection and low toxicity. Although halogenated flame retardants will still be the main varieties of flame retardants, the demand for halogen-free flame retardants and environmentally friendly flame retardants will increase due to the formation of toxic and corrosive substances when the flame retardants are burned;
2. High efficiency and multifunction. Developing efficient and multifunctional flame retardants can not only reduce the effects of flame retardants on the mechanical and physical properties of base materials, but also be beneficial to reduce pollution and reduce costs;
Nano and microencapsulation technology will be gradually applied;
Application of compounding technology. How to develop a new flame retardant with excellent properties by compounding technology is an important subject in the study of flame retardant materials and a very important direction in the development of flame retardants.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
In the modern flame retardant technology, epoxy resin composite flame retardant is an important aspect. The compounding technology of flame retardants contains two meanings: one is the compounding of different flame retardants; two, the coordination of flame retardants with different matrixes and different plastic additives.
Some flame retardants are only suitable for a certain matrix resin, therefore, different matrix resins should pay attention to the selection of suitable flame retardant elements. The epoxy resin compound flame retardant system has many kinds of flame retardant characteristics, and the synergistic effect of different epoxy resin composite flame retardants opens up a broad prospect for the flame retardant of synthetic materials.
The composition of flame retardants can be carried out in organic, inorganic and their interactions. The combination of organic and inorganic flame retardant used more widely, such as silicon phosphorus flame retardant compound system, this kind of complex system with organic flame retardant and high efficient inorganic flame retardant low smoke, non-toxic, can effectively reduce the cost and reduce the amount of inorganic flame retardant materials, improve the function of.
Has the features of flame retardant system, there may be a high flame retardant has development prospects: (1) flame retardant catalysis; (2) inhibition of oxidation reaction of condensed phase; (3), gas phase flame retardant effect; (4) the formation of coke layer effectively or other elements (such as silicon containing flame retardant, phosphorus etc. flame retardant elements of coke layer). Phosphorus silicon synergistic flame retardant has three characteristics, (1), (2) and (4). Therefore, phosphorus silicon synergistic flame retardant is one of the important directions of the development of flame retardant technology in the future.
The resin LOI increased from 23% to 28.5%, that of flame retardant epoxy resin modified by the system are well improved phosphorus epoxy resin to promote the generation of resin carbon layer through the acid induced dehydrogenation reaction mechanism, in the high temperature region, the formation of silica in the epoxy resin protective layer in silicon the surface of the specimen, inhibit the thermal oxidative degradation of carbon layer has been generated, prevent the loss of quality of coking carbon.
Using sol-gel method, some scholars by bisphenol A diglycidyl ether type epoxy resin (DGEBA) and four ethoxy silane (TEOS) nano composite epoxy resin was prepared in silicon phosphorus as one of the cross-linked network elements in phosphorus silicon hybrid materials, improve the flame retardancy of epoxy resin.
The combustion experiment showed that the charring rate of pure epoxy resin was 14.8% at 800, while the rate of carbon conversion of modified epoxy resin was 31%; the LOI of pure epoxy resin was 24%, and that of modified epoxy resin was 32%. It is worth mentioning that the epoxy resin containing the P-C and P-O keys in the process of thermal degradation, crosslinking is weak, susceptible to shear chain fracture, the modified epoxy resin thermal stability at low temperature and high temperature are very different, the pure epoxy resin 10% weight loss temperature of 399 DEG C however, the modified epoxy resin 10% weight loss temperature of 313 degrees, and 400 degrees in before the char yield is lower than the pure resin.
Tris(2-chloroisopropyl)Phosphate(TCPP)
Tris(2-chloroisopropyl)Phosphate(Flame retardant TCPP) is a colorless or yellowish oily liquid. It is soluble in benzene, alcohol, carbon tetrachloride and other organic solvents, but insoluble in water and aliphatic hydrocarbons. Its relative density is 1.27-1.31, refractive index is 1.4916 ( 21.5 ), viscosity is 58mm2 / S, chlorine content is 32.8%, and phosphorus content is 9.5%. As the molecule contains phosphorus and chlorine element simultaneously, its flame retardant properties is significant, as well as the plasticization, damp-proof, antistatic effects and so on. Tris(2-chloropropyl) phosphate (TCPP) is an additive flame retardant.
The product is used for the soft / hard polyurethane foam, with thermal and hydrolytic stability good, especially suitable for ASTME84 (Level 11) foam, with low viscosity unsaturated polyester resin in low temperature application and phenolic plastics at. This product is also used to grab the foam sealant and sheet production. For polyvinyl chloride, polystyrene, phenolic resin, acrylic resin and rubber, coating, flame retardant, also used for soft and hard polyurethane foam, epoxy resin, polystyrene, cellulose acetate, ethyl cellulose tree and phenolic plastics, polyvinyl acetate and gun type foam sealant production. Particularly recommended for rigid polyurethane foam has excellent thermal and hydrolytic stability is particularly suitable for ASTM84 (II), compound for polyurethane foam and unsaturated resin and phenolic plastics.
With the increase of temperature, the modified epoxy resin showed better thermal stability. The white combustion residue produced by siloxane [19] during combustion can form a composite inorganic layer with silica particles and carbonized material, which plays a dual barrier, obstructing the passage between combustible gas and flame melting zone, and protecting the polymer from the thermal radiation generated by the flame.
Hsiue and collaborators of the organic and inorganic nano hybrid silicon containing epoxy resin materials were prepared by in-situ sol-gel method, the glass transition temperature of the hybrid epoxy resin increased with the increase of silicon content, the synergistic effect between phosphorus and silicon makes the flame retardant properties of epoxy resin has been greatly improved, while the content of phosphorus and silicon respectively. 4.35% and 15.63%, the material of LOI was improved by the unmodified before 26% to 44.5% after treatment.
Epoxy resin has many prominent characteristics, such as good thermal stability, insulation, adhesion, good mechanical properties, excellent process performance and good performance, widely used in electronic components, bonding package and printed circuit board (PWBs) production etc.. The traditional flame retardant method of epoxy resin [8] is by adding bromine compounds and antimony oxide, they will have different negative effects on the environment.
Many effective and new flame retardants have been developed by studying the mechanism of flame retardants. The development trend of flame retardant research and development in recent years, we can see its development trend:
(1) environmental protection and low toxicity. Although halogenated flame retardants will still be the main varieties of flame retardants, the demand for halogen-free flame retardants and environmentally friendly flame retardants will increase due to the formation of toxic and corrosive substances when the flame retardants are burned;
2. High efficiency and multifunction. Developing efficient and multifunctional flame retardants can not only reduce the effects of flame retardants on the mechanical and physical properties of base materials, but also be beneficial to reduce pollution and reduce costs;
Nano and microencapsulation technology will be gradually applied;
Application of compounding technology. How to develop a new flame retardant with excellent properties by compounding technology is an important subject in the study of flame retardant materials and a very important direction in the development of flame retardants.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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