Patent ID: 9080034
Filing Date: 2015-07-14
Classification: C08K,C08L

Abstract:
1. A thermoplastic melt-mixed composition comprising: a) 15 to 89.5 weight percent of a polyamide resin selected from Group (III) polyamides having a melting point of at least 230° C., and comprising b) 0.50 to about 4.0 weight percent of one or more amino acids selected from the group consisting of primary amino acids and secondary amino acids; said amino acid having no hydroxyl groups and no more than one carboxylic acid; c) 0 to 5 weight percent of one or more polyepoxy compound comprising at least two or more epoxy groups; the polyepoxy compound having an epoxide equivalent weight of 43 to 4000 g/equivalent as determined by calculation, or if the polyepoxy compound is an oligomer, by titration using ASTM D1652-11 method; and a number average molecular weight (M d) 10 to 60 weight percent reinforcing agent; e) 0 to 30 weight percent polymeric toughener; and the weight per cents of components a), b), c) d) and e) are based on the total weight of the thermoplastic melt-mixed composition and wherein 2 mm thick test bars, prepared from said melt-mixed composition and exposed at a test temperature of 230° C. for a test period of 1000 hours, in an atmosphere of air, and tested according to ISO 527-2/1BA, have on average, a retention of tensile strength of at least 40 percent, as compared with that of an unexposed control of identical composition and shape.