Patent ID: 7176262

Claim:
Hydrogenated vinyl-polybutadiene polymer having degrees of hydrogenation of from 20 to 100%, Mooney viscosities in the range of from 10 to 150 Mooney units (ML 1+4/100° C.), glass transition temperatures (T g ) of ≦−57° C. number average molecular weight between 60,000 and 500,000 and enthalpies of fusion (ΔH) of ≦30 J/g and comprising a) from 0 to 44 wt. % 1,2-vinyl-butadiene units of the formula b) from 20 to 64 wt. % 1,2-butylene units of the formula c) from 0 to 60 wt. % 1,4-butenylene units of the formula and d) from 0 to 60 wt. % 1,4-butylene units of the formula wherein the hydrogenated vinyl-polybutadiene does not include solid polybutadiene which is subsequently hydrogenated and has a trans content of 4.7%, a vinyl content of 0.2%, a Mooney viscosity ML 1+4 of 27 and a molecular weight ratio M w /M n ×10 −3 of 291/96.