Process for preparing organosilicon prepolymers and polymers

Details Process for preparing organosilicon prepolymers and polymers Process for preparing organosilicon prepolymers and polymers

1990-01-05

1992-06-23

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 25, 528 31, C08L 8305, C08G 7704

Patent

active

051243750

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.

REFERENCES:
patent: 4902731 (1990-02-01), Leibfried
Toshimi Okada et al., "Asymmetric Hydrosilation of Cyclopentadiene and Styrene with Chlorosilanes Catalysed by Palladium Complexes of Chiral (.beta.-N-Sulfonylaminoalkyl) phosphines)" Chemistry Letters, pp. 999-1002.
V. Vaisarova' et al., "Palladium- and Nickel-Catalyzed Hydrosilylation of Cyclopentadiene", Collection Czechoslov. Chem. Comm. vol. 41, pp. 1906-1913 (1976).
Kohel Tamao, "Organofluorosilicates in Organic Synthesis. 12. Preparation of Organopentafluorosilicates and Their Cleavage Reactions by Halogens and N-Bromosuccinimide. Synthetic and Mechanistic Aspects", Organometallics 1, pp. 355-368 (1982).
Tamio Hayashi et al., "Optically Active Cyclic Allylsilanes Preparation by Asymmetric Hydrosilylation and Anti Stereochemistry in S.sub.E ' Reactions", Tetrahedron Letters, vol. 14, No. 50, pp. 5661-5664 (Pergamon Press 1983).
Keiji Yamamoto et al., "Catalytic Asymmetric Hydrosilylation of Olefins III. Chiral Phospine-Palladium(II) Complexes as Hydrosilylation Catalysts", Journal of Organometallic Chemistry, 210 pp. 9-17 (1981).
Iwao Ojima et al. "3-TMS-Cyclopentene-1, A New Reagent for the Synthesis of Cyclopentene Derivatives", Tetrahedron Letters No. 16, pp. 1385-1388 (Pergamon Press 1977).
Yoshihisa Kiso et al., "Asymmetric Homogeneous Hydrosilation with Chiral Phosphine-Palladium Complexes", Journal of the American Chemical Society 94:12 pp. 4373-4374 (Jun. 14, 1972).

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