Crosslinkable poly(unsaturated carbosilane) copolymers and metho

Details Crosslinkable poly(unsaturated carbosilane) copolymers and metho Crosslinkable poly(unsaturated carbosilane) copolymers and metho

1991-09-12

1992-12-15

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526179, 526180, 526181, 528 14, 528 31, 528 40, C08F13400, C08F13008

Patent

active

051718103

ABSTRACT:
Random or block copolymers with (1-hydro-1-R-1-sila-cis-pent-3-ene), poly(1-hydro-1-R-3,4 benzo-1-sila pent-3-ene), and disubstituted 1-silapent-3-ene repeating units of the general formula ##STR1## where R is hydrogen, an alkyl radical containing from one to four carbon atoms or phenyl, R.sup.1 is hydrogen, an alkyl radical containing from one to four carbon atoms, phenyl or a halogen and R.sup.2 is hydrogen, or R.sup.1 and R.sup.2 are combined to form a phenyl ring, are prepared by the anionic ring opening polymerization of silacyclopent-3-enes or 2-silaindans with an organometallic base and cation coordinating ligand catalyst system or a metathesis ring opening catalyst system.

REFERENCES:
Y. T. Park et al. (1990) Macromol 23, 1911-1915.
S. Q. Zhou et al (1990) Macromol 23, 1915-1917.
W. P. Weber et al (1990) Polymer Preprints 31(1), 44-45.
Yajima, S., et al., J. Mater. Sci., 1978, 13,2569.
Hirao, A. et al., Macromolecules, 1987, 20, No. 7, 1505.
Lammens, H., et al., Pol. Let., 1971, 9, 341.
Finkel'shtein, E. Sh., et al., Izvestiva Akademii Nauk SSR, Seriya Khimicheskaya, 1981, 3, 641.
Horvath, R. H.; Chan, T. H., J. Org. Chem., 1981, 52, No. 20, 4499.

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