Synthesis of elastomeric carborane-siloxanes by hydrosilation reactions
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsTeddy M Keller, Manoj K. Kolel-Veetil
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Abstract
A carborane-siloxane compound is provided having the repeat unit Q 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.
Claims4
A compound comprising a repeat unit comprising the formula:
- —U′—SiR′2—(O—SiR′2)x′—U′-Q-
- wherein each Q comprises groups selected from the group consisting of —SiR2—, —SiR2—O—, —C≡C—C≡C—, and carboranyl;
- wherein each R and R′ is independently selected from the group consisting of alkyl, aryl, alkylaryl, haloalkyl, haloaryl, and mixtures thereof;
- wherein each U′ is an independently selected group selected from —CH2—CH2— and —CH═CH—;
- wherein each x′ is an independently selected positive integer;
- and
- wherein the compound is a linear polymer or oligomer.
Dependencies are inferred from the claim text.