Patent ID: 7714057

Claim:
An automotive part, comprising at least one component formed from a polyolefin composition having a heat deflection temperature (HDT) of greater than about 100° C. and flexural modulus of greater than about 1930 MPa, the composition comprising: A) a crystalline isotactic propylene homopolymer having a flex modulus of greater than about 1930 MPa and an HDT of greater than about 100° C.; B) an ethylene/α-olefin interpolymer having Tg of less than about −30° C., a tan delta measured at 0.1 radians/s at 190° C. of less than about 2, an HDT that is greater than, or equal to, the peak melting temperature of the ethylene/α-olefin interpolymer, measured by differential scanning calorimetry, and C) a platy filler, and wherein the weight ratio of homopolymer:interpolymer (A:B) is between about 9:1 and about 6:4, and wherein the filler has an HDT efficiency factor greater than, or equal to, about 1.5, and a flexural modulus efficiency factor greater than about 3, and wherein each efficiency factor is determined by measuring the effect of a “20 weight percent addition of filler” on the respective HDT or flexural modulus of a blend of the crystalline isotactic propylene homopolymer and the ethylene/α-olefin interpolymer.