Patent ID: 6821635
Filing Date: 2004-11-23
Classification: B32B,C08J,C08L,Y10T

Abstract:
A polymer blend (A) comprising:a) from 49 to 70 weight percent based on the total weight of the blend, of a monovinylidene aromatic polymer having a weight average molecular weight (Mw) of from 210,000 to 400,000 and a melt flow of less than 12.0 g/10 mm.; b) from 20 to 50 weight percent based on the total weight of the blend, of a rubber modified monovinylidene aromatic polymer comprising a moriovinylidene aromatic polymer matrix having rubber particles dispersed therein, wherein the rubber particles comprise, based on the total weight of the rubber particles, from 25 to 100 weight percent rubber particles having a capsule morphology and a volume average particle size of from 0.1 to 0.4 microns; and from 75 to 0 weight percent rubber particles having an entanglement morphology having a volume average particle size of from 0.25 to 1 micron; and c) a monovinyl aromatic-conjugated diene block copolymer having a monovinyl aromatic monomer content of from 15 to 60 weight percent, based on the total weight of the block copolymer, wherein: i) the rubber and rubbery component in the rubber modified monovinylidene aromatic polymer and the monovinyl aromatic-conjugated diene block copolymer range from 3 to 10 weight percent based on the total weight of the blend; and ii) the amount of the monovinyl aromatic-conjugated diene block copolymer is less than 7 weight percent, based on the total weight of the blend.