| abstract |
The preparation method of dicyclohexyl methyl hydride diisocyanate type aqueous polyurethane glued membrane of the present invention, is related to polyurethane industrial field, and in particular to the preparation method of dicyclohexyl methyl hydride diisocyanate type aqueous polyurethane glued membrane, comprises the following steps：In equipped with agitator, reflux condensing tube, the 500mL four-hole boiling flasks of thermocouple, add dicyclohexyl methyl hydride diisocyanate, polyethers or PEPA and catalyst dibutyltindilaurylmercaptide cinnamic acid, and about 1 h is reacted under 80 degree, determine NCO content, when mass fraction 9.43% is reached, prepolymerization reaction terminates；Prepolymer is cooled to into 70 degree, addition is dissolved in dihydromethyl propionic acid, Isosorbide-5-Nitrae butanediol and the acetone of N methyl pyrrolidones, carries out chain extending reaction, when NCO mass fractions reach 2.30%, chain extending reaction terminates, and the present invention is simple to operate, convenient to process, and can guarantee that product quality, enhance product performance, cost-effective, reducing energy consumption. |