Sulfur-crosslinked hydrogenated vinyl polybutadienes, and use thereof for the production of technical rubber articles having good recovery behavior across a large temperature range
View Patent ↗The present invention relates to sulphur-crosslinked hydrogenated vinylpolybutadienes which serve for production of technical rubber items and of tyre components and have very good recovery performance over a wide temperature range.
1. A sulphur-crosslinked hydrogenated vinyl-polybutadiene, having compression set values in the range from
a) 1 to 4.3% at 23° C./70 h,
b) 2 to 22% at 70° C./70 h
c) 5 to 60% at 100° C./70 h
d) 8 to 70% at 125° C./70 h and
e) 10 to 78% at 150° C./70 h
and compressive stress relaxation values in the range from
f) 2 to 8.6% at 23° C./168 h and
said sulphur-crosslinked hydrogenated vinyl-polybutadiene prepared by crosslinking a hydrogenated vinyl-polybutadiene via sulphurs or in the form of sulphur donors, said hydrogenated vinyl-polybutadiene having a degree of hydrogenation in the range from 70 to 100%, a Mooney unit from 40 to 150 (ML 1+4/125° C.) and an enthalpy of fusion in the range from 0 to 10 J/g.
2. A technical rubber product, comprising the sulphur-crosslinked hydrogenated vinyl-polybutadiene of claim 1 .
3. A dynamically loaded tire component, comprising the sulphur-crosslinked hydrogenated vinyl-polybutadiene of claim 1 .
4. A conveyor belt, hose, gasket of any type, profile, bellow, sealing collar, valve, protective cap, bearings and damper, coupling, drive belt, coating, sheet and covering, sole, cable sheathing, membrane or composite composed of rubber/metal, rubber/plastic and rubber/textile, comprising the sulphur-crosslinked hydrogenated vinyl-polybutadiene of claim 1 .