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Crosslinkable saturated and unsaturated carbosilane polymers and formulations
   
Document Number
US Patent 5171792
Issued Date
December 15, 1992
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Inventors
Liao; Xiugao (Los Angeles, CA)
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Abstract
Crosslinkable saturated and unsaturated carbosilane polymers are prepared by polymerizing vinyl substituted 1-silacyclo-pent-3-ene or vinyl substituted 1-silacyclobutane monomers in the presence of an anionic ring opening catalyst.
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Number of Claims:
4
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Owner
Published
December 15, 1992
Application Number
07/871,903
Filed
April 21, 1992
US Classification
525/326.5   525/342 525/370
Int'l Classification
C08F   30/08   (20060101)   C08F   30/00   (20060101)  
Assistant Examiner
Parent Case
This is a divisional application of Ser. No. 757,281, filed Sep. 10, 1991, now U.S. Pat. No. 5,130,390.
USPTO Field of Search
525/326.5   525/342   525/370  
Related Patents
6867323 - Cross-coupling reaction of organosilicon nucleophiles - Owned by The Board of Trustees of the University of Illinois (Urbana, IL)

Improved methods for generating a --C--C-- bond by cross-coupling of a transferable group with an acceptor group. The transferable group is a substituent of an organosilicon nucleophile and the acceptor group is provided as an organic electrophile. The reaction is catalyzed by a Group 10 transition metal complex (e.g., Ni, Pt or Pd), particularly by a palladium complex. Certain methods of this invention use improved organosilicon nucleophiles which are readily prepared, can give high product yields and exhibit high stereoselectivity. Methods of this invention employ activating ions such as halides, hydroxide, hydride and silyloxides. In specific embodiments, organosilicon nucleophilic reagents of this invention include siloxanes, particularly cyclic siloxanes. The combination of the cross-coupling reactions of this invention with ring-closing metathesis, hydrosilylation and intramolecular hydrosilylation reactions provide useful synthetic strategies that have wide application.

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