Patent ID: 8796407

Claim:
A pipe composition comprising: (a) 80 to 99.5 weight percent of polyvinyl chloride; (b) 0.001 to 1.5 weight percent of one or more heat stabilizers; (c) 0.1 to 5 weight percent of one or more C 6 to C 32 linear, branched or cyclic alkyl, alkenyl, aryl, aralkyl or alkaryl carboxylic acids, corresponding C 1 to C 4 alkyl esters thereof and/or metal salts thereof; (d) 0.1 to 5 weight percent of one or more waxes; (e) 0.1 to 5 weight percent of one or more UV stabilizers; (f) 0.001 to 1 weight percent of one or more processing aid(s), the processing aid(s) being sufficient to provide efficient processing of the PVC while allowing the composition to form a fusion bond between a first pipe formed from the composition and a second pipe formed from a composition comprising polyvinyl chloride such that a fused joint therebetween comprising the fusion bond has a tensile strength that is at least 50% of the tensile strength of at least one of the first pipe or second pipe as measured by ASTM D638-2a, wherein the one or more processing aid(s) is the sole processing aid(s) present in the pipe composition; (g) 0.1 to 2 weight percent of one or more fillers; and (h) optionally, up to 2 weight percent of one or more pigments, based upon total weight of the pipe composition.