首页>
外国专利>
METHOD FOR THE PREPARATION OF COPOLYAMIDES BASED ON HEXAMETHYLENEDIAMINE ADIPIC ACID AND EVENTUAL AN OTHER CARBOXYLIC DIACIDE OF A LONG CHAIN AND A DIMERIC ACID
METHOD FOR THE PREPARATION OF COPOLYAMIDES BASED ON HEXAMETHYLENEDIAMINE ADIPIC ACID AND EVENTUAL AN OTHER CARBOXYLIC DIACIDE OF A LONG CHAIN AND A DIMERIC ACID
展开▼
机译:基于己二烯二胺基己二酸和长链烷烃的另一种羧酸二甲酰胺的共聚酰胺的制备方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
Homogeneous, high melting, flexible copolyamides, adopted as molding compositions and for textile applications, are conveniently prepared by (a) prepolymerizing either (i) mixture of adipic acid and hexamethylenediamine, or admixture thereof with at least one other short-chain dicarboxylic acid, or (ii) mixture of (1) a salt of adipic acid, or salt of admixture of adipic acid with at least one other short-chain dicarboxylic acid, and hexamethylenediamine, together with (2) free hexamethylenediamine, said prepolymerization (a) being carried out in the presence of a catalytically effective amount of a strong inorganic oxyacid, or strong organic oxyacid other than a carboxylic acid, or alkali or alkaline earth metal thereof, said resulting prepolymer having amino end groups, and thence (b) polycondensing said prepolymer with a fatty acid dimer.
展开▼