Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1988-08-16
1990-02-20
Bleutge, John C.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524862, 525479, 528 15, 528 31, 528 25, 556434, C08K 702, C08G 7704
Patent
active
049027310
ABSTRACT:
A novel organosilicon prepolymer, which is the partial reaction product of (a) a cyclic polysiloxane or a tetrahedral siloxysilane containing at least two hydrosilane groups and (b) a polycyclic polyene having in its rings at least two chemically distinguishable carbon-carbon double bonds, wherein the ratio of carbon-carbon double bonds in the rings of (b) to hydrosilane groups in (a) is greater than 0.5:1 and up to 1.8:1, and at least one of the compounds (a) and (b) has more than two reactive sites, a method for making the organosilicon prepolymer, and a method for preparing an organosilicon polymer therefrom, are disclosed.
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J. L. Speier et al., "The Addition of Silicon Hydrides to Olefinic Double Bonds". Part II. "The Use of Group VIII Metal Catalysts", 79 Journal of the American Chemical Society, 974, 975 (1957).
Alexander William S.
Bleutge John C.
Dean Jr. R.
Hercules Incorporated
Kuller Mark D.
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