Patent ID: 6383439
Filing Date: 2002-05-07
Classification: C08F,C08L

Abstract:
A polyamide blow molding process comprising blending polyamide with 5 to 40 weight percent of a composition comprising an ethylene-C3 to C8 &agr;-olefin polymer composition grafted with at least 0.05 weight %, based upon the weight of the polymer, of an unsaturated organic compound containing at least one carbonyl group, wherein the ethylene-C3 to C8 &agr;-olefin composition comprises:i) a first polymer fraction having a number average molecular weight of from 10,000 to 500,000, an ethylene content of from 30 to 80 weight % and a diene content of from 1.5 to 10 weight %, based upon the weight of the polymer; and ii) a second polymer fraction having a number average molecular weight of from 100,000 to 10,000,000, an ethylene content of from 40 to 90 weight % and a diene content of from 0 to 8 weight %, based upon the weight of the polymer; provided that: a) the second fraction has a higher molecular weight than the first fraction, b) the second fraction has an equal or higher ethylene content than the first fraction, c) the weight ratio of diene in the first fraction to diene in the second fraction is at least 0.5/1, d) the Mw/Mn of each fraction is independently from 2 to 6.5, and e) the first fraction comprises 95 to 60 weight % of the total polymer composition; and blow molding the blend.