Patent ID: 7309729

Claim:
An additive-matrix mixture formed by mixing ingredients comprising a poly(vinyl chloride)-containing matrix resin and at least one aqueous additive system, wherein each of the at least one aqueous additive systems comprises one polymeric additive selected from the group consisting of: i) acrylic impact modifiers; ii) methyl methacrylate-butadiene-styrene modifiers; and iii) polymeric processing aids; wherein the amount of polymeric additive in each of the at least one aqueous additive systems is from 5 to 70 percent by weight of the aqueous additive system, and wherein at least one of the at least one aqueous additive system comprises one polymeric processing aid for poly(vinyl chloride) that comprises 40% to 100%, based on the weight of said polymeric processing aid for poly(vinyl chloride), of an uncrosslinked polymer stage having Tg of 25° C. or higher.