Synthesis of elastomeric carborane-siloxanes by...

Details Synthesis of elastomeric carborane-siloxanes by... Synthesis of elastomeric carborane-siloxanes by...

2007-03-20

2008-11-11

Peng, Kuo-Liang (Department: 1796)

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

Synthetic resins

From boron reactant having at least one boron to hydrogen or...

C528S032000, C528S031000

Reexamination Certificate

active

07449535

ABSTRACT:
A carborane-siloxane compound is provided having the repeat unitQ contains any of —SiR2—, —SiR2—O—, —C≡C—C≡C—, carboranyl, and U′. Each R and R′ is alkyl, aryl, alkylaryl, haloalkyl, haloaryl, or mixtures thereof. Each U′ is derivable from hydrosilation of an alkenyl or alkynyl group. Each T is alkyl, aryl, alkylaryl, haloalkyl, haloaryl, mixtures thereof, —(O—SiR′2)xH, or the repeat unit. Each x and x′ is a positive integer. The compounds may be made be reacting a carborane-siloxane precursor having unsaturated end groups with a siloxane crosslinker in the presence of a hydrosilation catalyst.

REFERENCES:
patent: 3775452 (1973-11-01), Karstedt
patent: 5145886 (1992-09-01), Oxman et al.
patent: 6187890 (2001-02-01), Fehn et al.
patent: 6384172 (2002-05-01), Dvornic et al.

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