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Epoxy resin anhydride coating crosslinking agent performance
2017-7-22 11:20:15
Epoxy resin anhydride coating crosslinking agent performance
Epoxy Resin Adhesive Coating Crosslinker Performance: Phthalic anhydride (PA)
Phthalic anhydride for the traditional cross-linking agent, so far the amount is still large, mainly for electrical casting. Phthalic anhydride is white crystal, the melting point of 128 ℃, the biggest feature is the cheap, low cross-linking heat, electrical performance. Phthalic anhydride is easily sublimated when heated and needs to be blended with epoxy at higher temperatures, which may lead to a shorter period of use of the complex, and therefore must be used with special attention.
Epoxy resin anhydride coating cross-linking agent performance: tetrahydrophthalic anhydride (THPA)
Tetrahydrophthalic anhydride is a product of maleic anhydride and butadiene addition, white solid, melting point of 100 ° C, mixed with epoxy resin is more difficult, but no sublimation, can improve PA large casting formula components. Can be used for electrical casting, can also be used for powder coating, epoxy resin transfer film plastic cross-linking agent.
In addition, it can also be used as a crosslinking agent with phthalic anhydride and hexahydrophthalic anhydride. THPA isomerized to form the following four isomers. The mixture of these four isomers is liquid at room temperature.
The isomerization of THPA is as follows: Molecular weight: 152, acid equivalent: 72, specific gravity: 1.26, viscosity (4 * cup): 17.4 s, refractive index n25: 1.5021, melting point: room temperature liquid.
Epoxy resin anhydride coating crosslinking agent properties: hexahydrophthalic anhydride (HHPA)
HHPA by THPA hydrogenation, white solid, hygroscopicity, melting point of 36 ° C, at 50 ~ 60 ° C when easy to mix with epoxy resin, the mixture viscosity is very low, long life, cross-linking heat, but the application Of the process performance than Me THPA, Me HHPA is poor.
Because of the absence of double bonds in the molecular structure, the crosslinked epoxy resin is a colorless transparent material, and the crosslinked alicyclic epoxy resin has excellent weather resistance and resistance to leakage traces. In the United States, such materials have been used to cast light-emitting diodes and external large-scale electrical insulation.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
Epoxy Resin Adhesive Coating Crosslinker Performance: Phthalic anhydride (PA)
Phthalic anhydride for the traditional cross-linking agent, so far the amount is still large, mainly for electrical casting. Phthalic anhydride is white crystal, the melting point of 128 ℃, the biggest feature is the cheap, low cross-linking heat, electrical performance. Phthalic anhydride is easily sublimated when heated and needs to be blended with epoxy at higher temperatures, which may lead to a shorter period of use of the complex, and therefore must be used with special attention.
Epoxy resin anhydride coating cross-linking agent performance: tetrahydrophthalic anhydride (THPA)
Tetrahydrophthalic anhydride is a product of maleic anhydride and butadiene addition, white solid, melting point of 100 ° C, mixed with epoxy resin is more difficult, but no sublimation, can improve PA large casting formula components. Can be used for electrical casting, can also be used for powder coating, epoxy resin transfer film plastic cross-linking agent.
In addition, it can also be used as a crosslinking agent with phthalic anhydride and hexahydrophthalic anhydride. THPA isomerized to form the following four isomers. The mixture of these four isomers is liquid at room temperature.
The isomerization of THPA is as follows: Molecular weight: 152, acid equivalent: 72, specific gravity: 1.26, viscosity (4 * cup): 17.4 s, refractive index n25: 1.5021, melting point: room temperature liquid.
Epoxy resin anhydride coating crosslinking agent properties: hexahydrophthalic anhydride (HHPA)
HHPA by THPA hydrogenation, white solid, hygroscopicity, melting point of 36 ° C, at 50 ~ 60 ° C when easy to mix with epoxy resin, the mixture viscosity is very low, long life, cross-linking heat, but the application Of the process performance than Me THPA, Me HHPA is poor.
Because of the absence of double bonds in the molecular structure, the crosslinked epoxy resin is a colorless transparent material, and the crosslinked alicyclic epoxy resin has excellent weather resistance and resistance to leakage traces. In the United States, such materials have been used to cast light-emitting diodes and external large-scale electrical insulation.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
The product is identical to Ethancure 100 and Lonza DETDA 80, DETDA is very effective polyurethane elastomer chain extender; also be used as polyurethane and epoxy resin curing agent, epoxy resin of an antioxidant, industrial oils and lubricants . In addition, also as intermediates in organic synthesis.Especially for the RIM (reaction injection molding), is important in the field of spray polyurea chain extender species. Also can be used for casting polyurethane elastomer (CPU) and a curing agent, epoxy curing agent, epoxy resin of antioxidants, lubricants and industrial oils other antioxidants.
In addition, HHPA cross-linked epoxy resin can also be used to make pharmaceutical storage tank and oil-resistant valve body material, which at 100 ℃ 30% H2S04 has good corrosion resistance, but also better resistant to benzene, toluene and Alcohols and other solvents, but not alkali and halogenated hydrocarbon solvents.
M (HHPA): m (THPA) = 90: 10 is a liquid eutectic mixture at room temperature. The mixture of m (HHPA): m (HET) = 70: 30 has low reactivity and is liquid at room temperature and can form flame retardant anhydride complex.
Epoxy Resin Adhesive Coating Crosslinker Properties: Methyltetrahydrophthalic anhydride (Me THPA)
With maleic anhydride, respectively, with two different diene monomer synthesis, can be two different structure of methyl tetrahydrophthalic anhydride: 4 a monomethyl tetrahydrophthalic anhydride and 3 a methyl tetrahydrophthalic anhydride. They are solid acid anhydrides (melting points of 65 ° C and 63 ° C, respectively) and are rarely used alone as crosslinking agents.
The isomeric liquid mixture can be obtained by catalytic isomerization. The liquid Me THPA of the product is a mixture of different isomers, and the composition ratios of the isomers of the different manufacturers are different.
Because of the electrical insulation properties, mechanical strength and heat resistance of the epoxy resin crosslinked by methyltetrahydrophthalic anhydride, the price is relatively cheap and is widely used. It is mainly used for the impregnation of generators and locomotive motor coils , Insulators, insulation casing, transformers, transformer casting, TV power transformer potting, the methyl tetrahydrophthalic anhydride to become one of the most common new liquid acid anhydride cross-linking agent. In the United States, it is also used for monofilament winding glass fiber reinforced plastic cross-linking agent for the manufacture of crude oil pipeline, irrigation pipes, weapons and aerospace components.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
In addition, HHPA cross-linked epoxy resin can also be used to make pharmaceutical storage tank and oil-resistant valve body material, which at 100 ℃ 30% H2S04 has good corrosion resistance, but also better resistant to benzene, toluene and Alcohols and other solvents, but not alkali and halogenated hydrocarbon solvents.
M (HHPA): m (THPA) = 90: 10 is a liquid eutectic mixture at room temperature. The mixture of m (HHPA): m (HET) = 70: 30 has low reactivity and is liquid at room temperature and can form flame retardant anhydride complex.
Epoxy Resin Adhesive Coating Crosslinker Properties: Methyltetrahydrophthalic anhydride (Me THPA)
With maleic anhydride, respectively, with two different diene monomer synthesis, can be two different structure of methyl tetrahydrophthalic anhydride: 4 a monomethyl tetrahydrophthalic anhydride and 3 a methyl tetrahydrophthalic anhydride. They are solid acid anhydrides (melting points of 65 ° C and 63 ° C, respectively) and are rarely used alone as crosslinking agents.
The isomeric liquid mixture can be obtained by catalytic isomerization. The liquid Me THPA of the product is a mixture of different isomers, and the composition ratios of the isomers of the different manufacturers are different.
Because of the electrical insulation properties, mechanical strength and heat resistance of the epoxy resin crosslinked by methyltetrahydrophthalic anhydride, the price is relatively cheap and is widely used. It is mainly used for the impregnation of generators and locomotive motor coils , Insulators, insulation casing, transformers, transformer casting, TV power transformer potting, the methyl tetrahydrophthalic anhydride to become one of the most common new liquid acid anhydride cross-linking agent. In the United States, it is also used for monofilament winding glass fiber reinforced plastic cross-linking agent for the manufacture of crude oil pipeline, irrigation pipes, weapons and aerospace components.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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