Epoxy compounds Epoxy compounds used as plasticizers mainly include epoxy fatty acid glycerides, epoxy fatty acid other esters and epoxy tetrahydrophthalamide Three types of acid esters. They generally use unsaturated esters as raw materials and are obtained by oxidation with peroxyacids. Because the peroxyacid is unstable, it is usually carried out by adding hydrogen peroxide, carboxylic acid and reactants together during the reaction. So that once the peroxyacid is generated, the reactant will be epoxidized.
It is also possible to oxidize acetic acid with air under the action of a catalyst to generate peracetic acid, and then epoxidize it with the reactant. Peroxyformic acid is a stronger epoxide than peracetic acid,
The representative variety of epoxy fatty acid glyceride is epoxy soybean oil:
Because soybean oil is a fatty acid ester of glycerol, its fatty acid composition is 32%~36% of oleic acid, 52%~75% of linoleic acid, palm oil Acid 2.4%～6.8%, stearic acid 4.4%～7.3%, therefore, its composition is more complicated.
Epoxy fatty acid glyceride has good heat resistance and weather resistance, low volatility, small migration, good compatibility with PVC, PVC plasticizer The agent is mainly used in heat-resistant wires and agricultural films. also. Since they are non-toxic, they are also used in food packaging materials,
Epoxy fatty acid monoester varies with the source of fatty acid (grease) and the raw material alcohol used. The role of plasticizers such as butyl oxysoyate, butyl epoxy stearate and octyl ester. Epoxy fatty acid monoesters are mostly light yellow transparent liquids. They have better low-temperature performance and can be used as cold-resistant plasticizers, but they have greater mobility.
Epoxy tetrahydrophthalate is formed by the addition reaction of 1,3-butadiene and maleic acid to obtain four Hydrogen jasmine dicarboxylic acid liver, then esterification and finally epoxidation in the system.
Epoxy tetrahydrophthalate not only has the comprehensive performance of phthalate, but also has excellent weather resistance of epoxy plasticizer , good heat resistance and so on.
The commonly used EPS (dioctyl epoxy tetrahydrophthalate) is a colorless to light yellow oily liquid, and its plasticizing effect is comparable to that of DOP is equivalent, and non-toxic, anti-mildew, with excellent light and heat stability, can be used in films, sheets, artificial leather, cable materials and various moldings.
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