| purpose | This product is a plasticizer and stabilizer for polyvinyl chloride. The plasticizing efficiency is similar to DOP, the mixing performance is better than DOP, and can be used as the main plasticizer. Low volatility, small mobility, good resistance to extraction. Excellent photothermal stability, bacterial resistance, and durability can be imparted to the article. It is especially suitable for products such as transparent films, and is also widely used in artificial leather, plates, sheets, wire and cable materials, coatings and various molded products. Add the product of this product without oil-like solution or exudation phenomenon. Epoxy tetrahydrophthalate is the best kind of epoxy plasticizer. Epoxy plasticizer molecules contain epoxy structure, including epoxidized oil, epoxidized fatty acid monoester and epoxidized tetrahydrophthalate, is a kind of rapid development of plasticizers, which is more prominent in a new variety of epoxidized -1,2-polybutadiene (C60H90O5); As a plasticizer for polyvinyl chloride, the resulting product has excellent water resistance and drug resistance. |
| production method | tetrahydrophthalic anhydride is obtained by performing a Diene addition reaction between maleic anhydride and butadiene at 100-110 °c. The latter is then esterified with 2-Ethylhexanol under reduced pressure (1.333-2.666kPa) and at 120-130 °c using sulfuric acid catalysis. The reaction product was washed with water and distilled to obtain diethylhexyl tetrahydrophthalate, and then subjected to epoxidation reaction (55-60 ° C.) with hydrogen peroxide in formic acid and benzene solution under sulfuric acid catalysis to obtain a crude product. Crude product after separation, washing, neutralization, benzene removal, decolorization, pressure filtration, that is the finished product. Raw material consumption quota: maleic anhydride 250kg/t, butadiene 116kg/t, 2-Ethylhexanol 654kg/t, 30% hydrogen peroxide 570kg/t, formic acid 100kg/t. |
