4results about How to "High epoxy value" patented technology

The application discloses a preparation method of 2,2-di(3,3'-epoxycyclohexyl)propane, which uses a cycloalkadiene compound 2,2-di(3,3'-cyclohexenyl)propane as raw material, adopts a titanium silicalite / heteropoly acid phase transfer homogeneous catalytic system, uses hydrogen peroxide as an oxidant, catalytically synthesizes mono-epoxide and di-epoxide, and finally separates, refines and purifies the mono-epoxide (2,3-epoxycyclohexyl-2,3-cyclohexenyl)propane and the target product di-epoxide 2,2-di(3,3'-epoxycyclohexyl)propane through molecular distillation. The application no longer uses a traditional peroxycarboxylic acid process, and the obtained epoxidation product has high yield, high epoxy value, low colority and low chlorine content; meanwhile, the reaction system of the epoxide is simple, the process condition is mild, the reaction time is short, the reaction is safe and controllable, the environment is friendly, the technical and economic requirements can be met, the operation can be continuous, and the application is particularly suitable for occasions of large-scale production.

The invention discloses a preparation method and application of bio-based itaconic acid diglycidyl ester. The preparation method comprises the following steps: carrying out first reaction on itaconic acid and a sodium source at room temperature to prepare sodium itaconate; and carrying out a second reaction on a mixed reaction system at least containing the sodium itaconate, epoxy chloropropane, a catalyst and an anti-auto-agglutination agent to prepare the bio-based itaconic acid diglycidyl ester. The main raw materials for preparing the itaconic acid diglycidyl ester are bio-based sources, no organic solvent is needed in the reaction process, few reaction byproducts are generated, the prepared itaconic acid diglycidyl ester is high in purity and higher in epoxy value, the grafting compatilizer higher in epoxy value and grafting rate is easier to prepare, and the preparation method is suitable for industrial production. And the composition has a better compatibility effect.

The invention discloses a diglycidyl itaconate grafted elastomer compatilizer as well as a preparation method and application thereof. The itaconic acid diglycidyl ester grafted elastomer compatilizer is prepared from the following raw materials: an elastomer, a peroxide initiator, itaconic acid diglycidyl ester and an active monomer, wherein the active monomer comprises any one or a combination of more of acrylamide, acrylic acid, butyl acrylate, alpha-methyl styrene and vinyl acetate. The itaconic acid diglycidyl ester grafted elastomer compatilizer disclosed by the invention has the advantages of high epoxy value, high grafting rate, low odor, efficient compatibility and low cost, and can be used for toughening polypropylene, glass fiber reinforced nylon, polyester, engineering plastic alloy and other polymer composite materials; the interfacial compatibility of the composite material is greatly improved while toughening is performed, and the interface separation of the composite material is prevented, so that the mechanical property of the polymer composite material is greatly improved.

This invention provides a method for preparing epoxidized soybean oil and a composition for preparing epoxidized soybean oil. The preparation method includes the following steps: mixing soybean oil, an oxidant, a catalyst, and an auxiliary agent, and carrying out an epoxidation reaction to obtain epoxidized soybean oil; wherein, the oxidant is selected from a solution containing organic peroxides; the auxiliary agent is selected from sodium salts of organic acids, and the sodium salts of organic acids are selected from at least one of sodium alkylates and sodium tungstate. The preparation method effectively inhibits the occurrence of side reactions such as ring-opening reactions and excessive oxidation of unsaturated double bonds during the epoxidation process of epoxidized soybean oil by adding sodium alkylates and / or sodium tungstate as auxiliary agents during the preparation of epoxidized soybean oil, significantly improving the epoxy value and epoxy bond stability of epoxidized soybean oil while maintaining a relatively low iodine value.