News Details
Polyan anhydride coating crosslinking agent
2017-7-10 16:30:56
Polyan anhydride coating crosslinking agent is more application of dodecenyl succinic anhydride (DDSA), which by the propylene tetramer and maleic anhydride reaction synthesis, at room temperature was liquid. This anhydride and epoxy resin melt good, the batch has a longer period of use. And more with other acid anhydride used in order to improve the thermal deformation of its cross-linked temperature.
In the electrical insulation product molding, the application of anhydride-type cross-linking agent has many years of history, the development of poly anhydride cross-linking agent faster.
The aliphatic polyanhydride aliphatic polyanhydride is a product obtained by condensing the aliphatic dicarboxylic acid by intermolecular dehydration reaction, in which polyadipic anhydride, polydephthalic anhydride and poly sebacic anhydride are more commonly used. In China's epoxy resin casting industry, this type of linear polyanols commonly used as toughening crosslinking agent.
At present, the domestic production is mainly PAPA, PSPA two. PAPA molecular weight of 2000 to 5000, white powder, melting point 60 ℃, easy to absorb water, 60 ℃ viscosity of 0.8 ~ 1Pa · s. PAPA dosage is generally E-51 epoxy resin 100g; PAPA 70g; DMP a 30 lg. Cross-linking elongation of 100%, tensile strength of 35MPa, heat aging at 150 ℃ for 8 weeks, weight loss is only about 1%. PAPA high melting point, with a variety of other acid anhydride to form a low temperature eutectic mixture to facilitate the application process operation.
PSPA melting point of 80 ° C, generally with the liquid bisphenol A type epoxy resin with the amount of per 100g resin added 85g, adding DMP-30 1, 90 ℃ when the use of 1h, 120 ℃ after 2h cross-linking , Tensile strength of up to 21MPa, elongation of 80%. The epoxy resin with polyan anhydride crosslinked alone has a low heat distortion temperature, but is excellent in cold and shock resistance and electrical insulation properties. Polyethylenepetradecanedicarboxylic anhydride (SB-20AH), polydiphenyl substituted hexadecanedicarboxylic anhydride (ST-2P-AH) is a new type of polyan anhydride epoxy crosslinking agent, Under the liquid, easy to melt with the epoxy resin.
SB-20AH cross-linked material has a relatively high heat distortion temperature and mechanical strength, but with DDSA, Me HHPA cross-linking Compared to its value is still low. The most prominent performance of the polyanhydride crosslinker is its good resistance to thermal shock resistance.
The crosslinking of DDSA is slightly better, but it is not ideal; the performance of the polyanhydrides is good, and in the case of SB - 20AH And PSPA cross-linked the best.
Chinese name: Diethyl toluene diamine(DETDA)
Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.
Density 1.022
Viscosity (20 ℃) ??mPa·ss290±10
Pour Point ℃-9
Boiling point of310°C
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
In the electrical insulation product molding, the application of anhydride-type cross-linking agent has many years of history, the development of poly anhydride cross-linking agent faster.
The aliphatic polyanhydride aliphatic polyanhydride is a product obtained by condensing the aliphatic dicarboxylic acid by intermolecular dehydration reaction, in which polyadipic anhydride, polydephthalic anhydride and poly sebacic anhydride are more commonly used. In China's epoxy resin casting industry, this type of linear polyanols commonly used as toughening crosslinking agent.
At present, the domestic production is mainly PAPA, PSPA two. PAPA molecular weight of 2000 to 5000, white powder, melting point 60 ℃, easy to absorb water, 60 ℃ viscosity of 0.8 ~ 1Pa · s. PAPA dosage is generally E-51 epoxy resin 100g; PAPA 70g; DMP a 30 lg. Cross-linking elongation of 100%, tensile strength of 35MPa, heat aging at 150 ℃ for 8 weeks, weight loss is only about 1%. PAPA high melting point, with a variety of other acid anhydride to form a low temperature eutectic mixture to facilitate the application process operation.
PSPA melting point of 80 ° C, generally with the liquid bisphenol A type epoxy resin with the amount of per 100g resin added 85g, adding DMP-30 1, 90 ℃ when the use of 1h, 120 ℃ after 2h cross-linking , Tensile strength of up to 21MPa, elongation of 80%. The epoxy resin with polyan anhydride crosslinked alone has a low heat distortion temperature, but is excellent in cold and shock resistance and electrical insulation properties. Polyethylenepetradecanedicarboxylic anhydride (SB-20AH), polydiphenyl substituted hexadecanedicarboxylic anhydride (ST-2P-AH) is a new type of polyan anhydride epoxy crosslinking agent, Under the liquid, easy to melt with the epoxy resin.
SB-20AH cross-linked material has a relatively high heat distortion temperature and mechanical strength, but with DDSA, Me HHPA cross-linking Compared to its value is still low. The most prominent performance of the polyanhydride crosslinker is its good resistance to thermal shock resistance.
The crosslinking of DDSA is slightly better, but it is not ideal; the performance of the polyanhydrides is good, and in the case of SB - 20AH And PSPA cross-linked the best.
Chinese name: Diethyl toluene diamine(DETDA)
Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.
Density 1.022
Viscosity (20 ℃) ??mPa·ss290±10
Pour Point ℃-9
Boiling point of310°C
Flash Point°C161.1°C
Epoxy resin classification is not yet unified, generally in accordance with the strength, heat resistance grade and characteristics of classification, epoxy resin, there are 16 major varieties, including general rubber, structural adhesive, high temperature plastic, low temperature plastic, water and wet surface Glue, conductive glue, optical glue, spot glue, epoxy resin film, styrofoam, strain glue, soft material adhesive glue, sealant, special glue, latent cross-linked plastic, 16 kinds of civil construction glue.
Classification of epoxy resin adhesives in the industry there are several sub-methods:
1, according to its main component is pure epoxy resin adhesive and modified epoxy resin adhesive;
2, according to their professional use is divided into mechanical epoxy resin adhesive, building epoxy resin adhesive, electronic epoxy adhesive, repair with epoxy adhesive and plastic for transportation, ship with plastic Wait;
3, according to its construction conditions are divided into normal temperature cross-linked plastic, low temperature cross-linked plastic and other cross-linked plastic;
4, according to its packaging can be divided into single-component type of plastic, two-component plastic and multi-component type glue;
There are other sub-methods, such as solvent-free glue, solvent-based glue and water-based glue. But the application of more classification.
The epoxy resin has a secondary hydroxyl group and an epoxy group, and the secondary hydroxyl group may be reacted with an isocyanate. Epoxy resin as a polyol directly into the polyurethane adhesive containing hydroxyl components, the use of this method only hydroxyl reaction, the epoxy group failed to react.
Epoxy resin classification is not yet unified, generally in accordance with the strength, heat resistance grade and characteristics of classification, epoxy resin, there are 16 major varieties, including general rubber, structural adhesive, high temperature plastic, low temperature plastic, water and wet surface Glue, conductive glue, optical glue, spot glue, epoxy resin film, styrofoam, strain glue, soft material adhesive glue, sealant, special glue, latent cross-linked plastic, 16 kinds of civil construction glue.
Classification of epoxy resin adhesives in the industry there are several sub-methods:
1, according to its main component is pure epoxy resin adhesive and modified epoxy resin adhesive;
2, according to their professional use is divided into mechanical epoxy resin adhesive, building epoxy resin adhesive, electronic epoxy adhesive, repair with epoxy adhesive and plastic for transportation, ship with plastic Wait;
3, according to its construction conditions are divided into normal temperature cross-linked plastic, low temperature cross-linked plastic and other cross-linked plastic;
4, according to its packaging can be divided into single-component type of plastic, two-component plastic and multi-component type glue;
There are other sub-methods, such as solvent-free glue, solvent-based glue and water-based glue. But the application of more classification.
The epoxy resin has a secondary hydroxyl group and an epoxy group, and the secondary hydroxyl group may be reacted with an isocyanate. Epoxy resin as a polyol directly into the polyurethane adhesive containing hydroxyl components, the use of this method only hydroxyl reaction, the epoxy group failed to react.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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