Patent ID: 6734247
Filing Date: 2004-05-11
Classification: C08K,C08L

Abstract:
A polymer alloy comprising:from about 90 to 20 weight % of a brittle polymer with a weight average molecular weight greater than 180,000, and comprising: (i) from 80 to 45 weight % of one or more C8-12 vinyl aromatic monomers; (ii) from 20 to 55 weight % of one or more C1-6 alkyl esters of C3-6 ethylenically unsaturated carboxylic acids; and (iii) from 0 to 5 weight % of one or more C3-6 ethylenically unsaturated carboxylic acids or anhydrides; from about 0 to about 60 weight % of a tapered, linear or radial di- or tri-block rubbery polymer comprising: (i) from 30 to 45 weight % of one or more C8-12 vinyl aromatic monomers; and (ii) from 70 to 55 weight % of one or more C4-6 conjugated diolefins; from about 0 to about 80 weight % of a tapered, linear or radial di- or tri-block ductile polymer comprising: (i) from 65 to 80 weight % of one or more C8-12 vinyl aromatic monomers; and (ii) from 35 to 20 weight % of one or more C4-6 conjugated diolefins; and a plasticizer mixed into said brittle polymer in an amount greater than 0.4 weight % based on the total weight of the polymer alloy.