THERMOPLASTIC POLYMER COMPOSITION HAVING IMPROVED MECHANICAL PROPERTIES

摘要

Disclosed is a thermoplastic polymer composition of polyamide including: A) polyamide composition comprising, a) 55-90 weight percent semi-crystalline, semi-aromatic co-polyamide, and b) 10-45 weight percent aliphatic homo-polyamide; B) 5-40 weight percent of co-grafted polymeric toughener wherein the co-grafted polymeric toughener is a co-grafted blend of polyolefins with at least two glass transition temperatures and obtained from the blend of polyolefins and a reactive monomer; C) 0-15 weight percent one or more plasticizers; D) 0-2.5 weight percent one or more antioxidants and or a heat stabilizer; E) 0 to 5 weight percent of additives selected from the group consisting of flame retardant, UV stabilizer, light stabilizer, thermal stabilizer, lubricant, colorant or the like. Further disclosed herein is a process for providing the composition and its application.

主权项

1. A thermoplastic polymer composition comprising
A) a polyamide composition comprising
a) 55 to 90 weight percent semi-crystalline semi-aromatic co-polyamide; wherein said semi-aromatic co-polyamide comprises
a-1) about 10 to 40 mole percent aromatic repeat units derived from:
i) one or more aromatic dicarboxylic acid with 8 to 16 carbon atoms andan aliphatic diamine with 4 to 20 carbon atoms; anda-2) about 60 to 90 mole percent aliphatic repeat units derived from:
ii) one or more aliphatic dicarboxylic acid with 6 to 20 carbon atoms and said aliphatic diamine with 4 to 20 carbon atoms;b) 10 to 45 weight percent aliphatic homo-polyamide; wherein said aliphatic homo-polyamide comprises repeat units derived from;
iii) an aliphatic dicarboxylic acid with 6 to 20 carbon atoms and an aliphatic diamine with 4 to 20 carbon atoms; oriv) an aliphatic lactam or aminocarboxylic acid with 6 to 20 carbon atoms;wherein weight percent of a) and b) are based on the total weight of a) and b); B) 5 to 40 weight percent co-grafted polymeric toughener wherein the co-grafted polymeric toughener is a co-grafted blend exhibiting at least two glass transition temperatures and is obtained from polyolefins comprising:
b1) 55-90 weight percent of a first polyolefin with at least one glass transition temperature>−20° C. and softening temperature>75° C. and is selected from the group consisting of ethylene homopolymers, propylene homopolymers, copolymers of ethylene with one or more alpha-olefins having 3-10 carbon atoms, and copolymers propylene with one or more alpha-olefins having 2-10 carbon atoms;b2) 10-45 weight percent of a second polyolefin with highest glass transition temperature<−20° C. and softening temperature<75° C. and is selected from copolymers of ethylene with one or more alpha olefins or dienes having at least 3 carbon atoms wherein the polyolefins (b1) and (b2) are melt blended and co-grafted with a reactive monomer, optionally in presence of a peroxide; C) 0 to 15 weight percent of one or more plasticizers; D) 0 to 2 weight percent of one or more antioxidants; E) 0 to 5 weight percent of additives selected from the group consisting of flame retardant, UV stabilizer, light stabilizer, thermal stabilizer, lubricant, colorant or the like; wherein the weight percent of B), C), D) and E), are based on the total weight of the thermoplastic composition.