Patent ID: 9309391
Filing Date: 2016-04-12
CPC Classification: B29C,B29K,C08F,C08J,C08L

Claim Text:
1. A process for improving the flow properties of a melt containing a thermoplastic polymer, which comprises: incorporating 0.005% to 0.5% by weight, relative to the weight of the thermoplastic polymer, of one or more comb or comb block copolymers into said thermoplastic polymer prior to or during melt processing and melt processing the resultant mixture, thereby postponing an appearance of melt fracture to higher shear rates, wherein the one or more comb or comb block copolymers are prepared in a first step, which comprises: a) free radical polymerizing a C b) modifying in a polymer analogous transesterification reaction with a primary or secondary alcohol to form the comb or comb block copolymer.