Patent ID: 8592501
Filing Date: 2013-11-26
Classification: B32B,C08L,E04F,Y10T

Abstract:
1. A composition for a surface covering or portion thereof comprising: A) at least one ethylene propylene copolymer having a melt flow rate of from 0.5 to 15 g/10 min., obtainable by Ziegler Natta sequential polymerization, where the total content of copolymerized ethylene is from about 20 to about 60 wt %, having a melting point of from about 140° C. to about 160° C., a flexural modulus of from about 20 Mpa to about 500 Mpa and a density from 0.870 to 0.900 g/cm (B) at least one thermoplastic bio-resin derived from starch or soy or both, optionally having a softening temperature of about 125° C., and/or a melting temperature of about 156° C., and/or a density of about 1.12 to 1.3 g/cm (C) at least one compatibilizer made from functionalizing polyolefin with at least one polar group of carboxylic acid, maleic anhydride, acrylic acid, ethylene methacrylic acid, or methyl acrylate, where the polar group is present in the range of from about 0.1 to about 10 wt % of the polyolefin (based on the total weight of the composition), and the polyolefin having an isotactic index of from about 85% to about 95% and the functionalizing polyolefin having a melt flow rate range from about 100-450 g/10 min, (D) at least one styrenic thermoplastic block copolymer of styrene/ethylene/butylene or styrene/ethylene/propylene where the polystyrene content in the block copolymer is from about 7 to about 30%, and the block copolymer having a melt flow rate of from 2.5 to 25 g/10 min., (E) at least one filler, and (F) at least one dispersion agent made from isotactic polypropylene homopolymer by either free radical degradation in peroxide or an isotactic polypropylene homopolymer made by single site catalyst polymerization, having an isotactic index greater than 80 and a melt flow rate (melt flow rate) from about 1000 to about 2000 g/10 min., at 230° F. and 2.16 kg according to ASTM D1238, and, optionally, at least one hydrocarbon tackifier comprising a blend of an aliphatic hydrocarbon resin, an aromatic hydrocarbon polymer functionalized with fatty acid ester having a softening temperature at from about 103° C. to 113° C., and, optionally, at least one ethylene octene copolymer produced by single site catalyst polymerization and having a melt flow rate from about 3 to about 30 g/10 min., a melting temperature from about 60° C. to 90° C. and a density from about 0.860 to about 0.902 g/cm