Patent ID: 8877851

Claim:
A polyester composition comprising: a) 3 to 40 weight percent of at least one polyester selected from the group consisting of polybutylene terephthalate, polytrimethylene terephthalate, polyethylene terephthalate, poly(ethylene 2,6-naphthoate), poly(1,4-cyclohexyldimethylene terephthalate), and combinations thereof; b) 25 to 50 weight percent of a platy or of a particulate non-fibrous graphite having an aspect ratio of less than 2; c) 10 to 40 weight percent of a inorganic filler having an aspect ratio of at least 2 selected from the group consisting of glass fibers, aramid fibers, ceramic fibers, potassium titanate fibers, and combinations thereof; d) 3 to 10 weight percent of a copolyether ester elastomer; wherein: the amount of a+b+c+d is 100 weight percent of the polyester composition; the amount of b+c is at least 50 weight percent of the polyester composition the weight ratio of the copolyether ester elastomer to the polyester is from 0.3 to 0.4; and the polyester composition has at least a 0.2 percent elongation, a thermal conductivity of at least 3 WmK, and a tensile strength of at least 25 MPa.