Crosslinkable poly(unsaturated carbosilane) polymers and methods

Details Crosslinkable poly(unsaturated carbosilane) polymers and methods Crosslinkable poly(unsaturated carbosilane) polymers and methods

1990-12-31

1992-12-08

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 26, 528 40, C08F13400, C08F13008

Patent

active

051699168

ABSTRACT:
Poly(1-hydro-1-R-1-sila-cis-pent-3-ene) and poly(1-hydro-1-R-3,4 benzo-1-sila pent-3-ene) polymers having 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.

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) Polym. Preprints 31(1), 44-45.

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