Patent ID: 7851556
Filing Date: 2010-12-14
Classification: C08K,C08L

Abstract:
1. A thermoplastic vulcanizate consisting of: (i) 155 parts by weight poly(butene-1) characterized by a 0.7 dg/min MFR, determined according to ASTM D-1238 using 2.16 kg at 230° C., 30 parts by weight paraffinic oil, 1.8 parts by weight stannous chloride, 2 parts by weight zinc oxide, and 6 parts by weight phenolic resin, each based on 100 parts by weight poly(ethylene-co-propylene-co-5-vinyl-2-norbornene); and (ii) where said thermoplastic vulcanizate is characterized by a tensile strength determined according to ASTM D-412 at 23-° C., of 6.37 MPa and a Shore A hardness of 83; (iii) 100 parts by weight poly(ethylene-co-propylene-co-5-vinyl-2-norbornene) having 3.9 wt percent 5-vinyl-2-norborene and 64 wt percent ethylene; an oil-extended Mooney viscosity ML(1+4) at 125° -C. of 52; an intrinsic viscosity in decalin of 4 dl/g; and a weight average molecular weight of 850 kg/mole; and (iv) 75 parts by weight white oil in combination with the poly(ethylene-co-propylene-co-5-vinyl-2-norbornene).