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
2003-10-28
2011-10-18
Gulakowski, Randy (Department: 1766)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C528S023000, C528S025000, C528S032000
Reexamination Certificate
active
08039561
ABSTRACT:
To provide a highly efficient and stable method for the preparation of a silicon-containing polysulfide-type polymer, in particular, a polysulfide-type polymer with organosilyl groups, the method being carried out without generation of by-products that could have high impact on the environment. A method for the preparation of a silicon-containing polysulfide-type polymer characterized by mixing (A) a silicon-containing compound having a silicon atom-bonded monovalent organic group having an aliphatic unsaturated bond; (B) a polysulfide polymer with at least two mercapto groups in one molecule; and (C) an organic base or ammonia; the mixing being carried out in the presence of (D) sulfur.
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Iwai Makoto
Saiki Takeaki
Dollinger Mike M
Dow Corning Toray Company, Ltd.
Gulakowski Randy
Howard & Howard Attorneys PLLC
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