Claims
- 1. A composition comprising the reaction product of
- (i) 2 to 40 weight percent of silanol endblocked polydiorganosiloxane fluids of the general formula ##STR6## (ii) 0.1 to 20 weight percent of chlorobenzyl functional silanes of the formula ##STR7## (iii) 35 to 97.89 weight percent of low molecular weight cyclic siloxanes of the general formula ##STR8## and (iv) 0.01 to 5 weight percent of a catalyst;
- wherein R.sup.1 is independently selected from the group consisting of alkylene groups containing 1 to 10 carbon atoms, arylene groups containing 6 to 10 carbon atoms; and alkarylene groups containing 6 to 15 carbon atoms; any of said alkylene groups optionally containing an ether oxygen within the aliphatic segments thereof;
- Y is a chlorobenzyl group;
- R.sup.2 is independently selected from the group consisting of an alkyl group containing 1 to 6 carbon atoms and an aryl group containing 6 to 10 carbon atoms;
- R.sup.3 is independently selected from the group consisting of R.sup.2 and the groups --O--R.sup.2 and --R.sup.1 --Y with the proviso that at least two R.sup.3 groups are --O--R.sup.2 and where R.sup.1, R.sup.2 and Y are as defined above;
- R.sup.4 is independently selected from the group consisting of an alkyl group consisting of 1 to 6 carbon atoms and an aryl group consisting of 6 to 10 carbon atoms;
- y has the value of 1 to 10,000; and
- z has the value of 1 to 4.
- 2. A composition as claimed in claim 1 wherein the catalyst is tetrabutyl titanate.
- 3. A composition as claimed in claim 1 wherein y has the value of 10 to 1,000; and the silane of (ii) is a chlorobenzyl functional trimethoxy silane.
Parent Case Info
This is a divisional of copending application(s) Ser. No. 07/596,131 filed on Oct. 11, 1990 which is a divisional of copending application Ser. No. 07/442,882 filed on Nov. 29, 1989, now U.S. Pat. Nos. 5,061,482 and 5,045,310, respectively.
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Divisions (2)
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Number |
Date |
Country |
Parent |
596131 |
Oct 1990 |
|
Parent |
442882 |
Nov 1989 |
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