68 results about "Isopropenyl acetate" patented technology

The invention relates to a carboxyl nitrile latex for gloves and a preparation method thereof. Specifically, in parts by mass, the raw materials include 80-100 parts of deionized water, 1-3 parts of a molecular weight regulator, and 0.2-0.4 parts of a pH buffer. , 2-6 parts of emulsifier, 40-60 parts of butadiene, 15-40 parts of acrylonitrile, 10-20 parts of functional monomer, 2-5 parts of unsaturated carboxylic acid, 0.3-1.5 parts of initiator, 0.4 part of auxiliary ~0.6 parts; the functional monomers include ethylene glycol diacrylate, diallyl maleate and isopropenyl acetate in a mass ratio of 1:(1-1.2):(0.5-1). The carboxylated nitrile latex of the present invention has excellent chemical stability and mechanical stability.

The invention relates to a method for preparing waterproof adhesive for corrugated paper production, and belongs to the technical field of paper coating adhesive. A starch-isopropenyl acetate cross linked graft copolymer is synthesized, and then the waterproof adhesive for the corrugated paper production is prepared. The method for preparing the waterproof adhesive for the corrugated paper production can effectively reduce the damage of water molecules to the adhesive so that the waterproof property of the adhesive is greatly improved; and because the hydrophilic property of the modified adhesive declines, the adhesive has good quick drying property and is favorable to be used on high-speed corrugated lines.

A method for refining high-purity acetylacetone comprises procedures of devolatiligation, deacidification and deanhydride to coarse acetylacetone which later on enters a refining tower T1. The method is characterized in that the refining tower T1 is a pressure relief refining tower, the high-purity acetylacetone is extracted from the upper side line of the rectification section in liquid phase, acetone generated by the decomposition of acetylacetone and low-boiling mixed components, such as isopropenyl acetate, which are not completely removed due to instability of the initial stage of the process, are collected at the top of the tower, returned to a coarse acetylacetone groove V1, placed in the refining tower T1 after the procedures of devolatiligation, deacidification and deanhydride, and the tower kettle uses high-boiling components. The invention has the advantages that the refining tower T1 has the function of removing a small mount of low-boiling components because of liquid phase side line discharge way thereof, meanwhile, the acetone and isopropenyl acetate obtained from the top of the tower can be recycled, and the tower kettle uses high-boiling components, so that the whole rectification section is easy to control, flexible in operation, high in purity of the finished products, and stable in mass content of 99.9%.

The invention relates to a catalyst for synthesizing isopropenyl acetate and a preparation method thereof, which mainly solve the problems that in the prior art, the Pd-Cu alloy crystal grains are too small, so the initial activity of the catalyst is too high, the catalyst is in a lower reaction temperature for a long time, the induction period of the catalyst is prolonged, and the yield of the isopropenyl acetate is reduced. The catalyst and the preparation method have the technical scheme that Pd (palladium), Cu (copper) and alkali metal acetates are loaded on silicon dioxide, aluminum oxide or a mixture of the silicon dioxide and the aluminum oxide, and the Pd-Cu alloy crystal grain size is 5 to 15nm. The problems are perfectly solved, and the catalyst and the preparation method can be used for industrial production of isopropenyl acetate catalysts.