Patent ID: 6602956
Filing Date: 2003-08-05
Classification: C08F

Abstract:
A modified olefinic thermoplastic elastomer composition formed by melt blending an olefinic thermoplastic elastomer with sufficient amounts of a free radical generator (A) and a co-curative agent (B) to promote crosslinking to a gel content of about 10 to 80%, wherein the olefinic thermoplastic elastomer and the modified olefinic thermoplastic elastomer composition each have a melt strength measured at a temperature of 220Â° C. and a surface gloss level, with the melt strength of the modified olefinic thermoplastic elastomer composition divided by the melt strength of olefinic thermoplastic elastomer before addition of the curative agents providing a ratio of about 1.5/1 to 20/1, and with the surface gloss level of the olefinic thermoplastic elastomer composition after addition of the curative agents (GL2) divided by the surface gloss level of the olefinic thermoplastic elastomer composition before addition of the curative agents (GL1) providing a ratio which is equal to or greater than 0.01 but equal to or less than 0.5, wherein the sufficient amounts are about 0.001 to 0.05 pph of free radical generator (A) and about 0.001 to 7.5 pph of co-curative agent (B).