SEMI-AROMATIC COPOLYAMIDE RESIN AND POLYAMIDE MOLDING COMPOSITION CONSISTING OF SEMI-AROMATIC COPOLYAMIDE RESIN

摘要

Disclosed are a semi-aromatic copolyamide resin and a polyamide molding composition consisting of the semi-aromatic copolyamide resin. The semi-aromatic copolyamide resin consists of the following repeat units: (A) 26-80 mol% of units derived from para-aminobenzoic acid; (B) 4-70 mol% of units derived from 11-aminoundecanoic acid or 11-lactam, and 0-70 mol% of units derived from other amino acid or lactam having 6-36 carbon atoms; (C) 0-37 mol% of units derived from diamine having 4-36 carbon atoms; and (D) 0-37 mol% of units derived from diacid having 6-36 carbon atoms, wherein (A)+(B)+(C)+(D)=100 mol%, and the molar content of the units derived from para-aminobenzoic acid and the molar content of the units derived from 11-aminoundecanoic acid or 11-lactam are not equal to 50 mol% at the same time. The semi-aromatic copolyamide resin of the present invention has high heat resistance, improved color performance, good fluidity, and low water absorption rate. The molding composition consisting of the semi-aromatic copolyamide resin also has obvious performance advantages of heat resistance, water absorption rate, and color.