Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2007-02-13
2007-02-13
Choi, Ling-Sui (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S339000, C525S232000, C525S333200, C526S335000
Reexamination Certificate
active
10854385
ABSTRACT:
The hydrogenated vinyl-polybutadienes according to the present invention have 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 (Tg) of ≦−57° C. and enthalpies of fusion (ΔH) of ≦30 J/g and having a microstructure witha) from 0 to 44 wt. % 1,2-vinyl-butadiene units of the formulab) from 20 to 64 wt. % 1,2-butylene units of the formulac) from 0 to 60 wt. % 1,4-butenylene units of the formulain-line-formulae description="In-line Formulae" end="lead"?CH2—CH═CH—CH2in-line-formulae description="In-line Formulae" end="tail"?andd) from 0 to 60 wt. % 1,4-butylene units of the formulain-line-formulae description="In-line Formulae" end="lead"?CH2—CH2—CH2—CH2in-line-formulae description="In-line Formulae" end="tail"?are outstandingly suitable for the production of rubber molded bodies of any kind, especially for the production of industrial rubber articles and of tires and tire components. The rubber molded bodies produced from the hydrogenated vinyl-polybutadienes according to the present invention have good resistance to ageing and good elasticity at low temperatures.
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Obrecht Werner
Stere Cristina
Bayer Aktiengesellschaft
Choi Ling-Sui
Seng Jennifer R.
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