Polyorganosiloxane—containing compositions
AssigneeSiovation, LLC
InventorBurt M. Wrolson
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Abstract
A polyorganosiloxane-containing composition which comprises a cationic emulsion of a polyorganosiloxane and a surface-modified colloidal silica component having a zeta potential greater than zero. This composition optionally contains a silicone-curing catalyst.
Claims14
An elastomeric film formed from a polyorganosiloxane-containing composition which comprises:
- A. a cationic emulsion of a polyorganosiloxane and
- B. a surface-modified colloidal silica component having a zeta potential greater than zero,
- wherein the composition forms an elastomeric film upon the removal of water from the composition and wherein the polyorganosiloxane is comprised of the following monomeric units:
- wherein each R is independently selected from a saturated or unsaturated alkyl group of 1-6 carbon atoms;
- a saturated or unsaturated aryl group of 6-10 carbon atoms;
- R1Q;
- and R1Q1T;
- and wherein each R1 is independently selected from an alkylene group of 1-6 carbon atoms or an arylene group of 6-10 carbon atoms;
- and wherein each Q is independently selected from a functional group;
- and wherein each Q1 is independently selected from a non-carbon atom;
- and wherein each T is independently selected from a saturated or unsaturated alkyl group of 1-6 carbon atoms or a saturated or unsaturated aryl group of 6-10 carbon atoms;
- and wherein the a monomeric unit comprises from about 50 to about 99.9 mole percent of the polyorganosiloxane, the b monomeric unit comprises from about 0 to about 30 mole percent of the polyorganosiloxane and the c monomeric unit comprises from about 0 to about 30 percent of the polyorganosiloxane, provided that the sum of b & c must be greater than 0.
A process for the manufacture of an elastomeric film from a polyorganosiloxane-containing composition, wherein the process comprises combining a surface-modified colloidal silica component having a zeta potential greater than zero and a cationic emulsion of a polyorganosiloxane, and then removing water from the composition, wherein the polyorganosiloxane is comprised of the following monomeric units:
- wherein each R is independently selected from a saturated or unsaturated alkyl group of 1-6 carbon atoms;
- a saturated or unsaturated aryl group of 6-10 carbon atoms;
- R1Q;
- and R1Q1T;
- and wherein each RI is independently selected from an alkylene group of 1-6 carbon atoms or an arylene group of 6-10 carbon atoms;
- and wherein each Q is independently selected from a functional group;
- and wherein each Q1 is independently selected from a non-carbon atom;
- and wherein each T is independently selected from a saturated or unsaturated alkyl group of 1-6 carbon atoms or a saturated or unsaturated aryl group of 6-10 carbon atoms;
- and wherein the a monomeric unit comprises from about 50 to about 99.9 mole percent of the polyorganosiloxane, the b monomeric unit comprises from about 0 to about 30 mole percent of the polyorganosiloxane and the c monomeric unit comprises from about 0 to about 30 percent of the polyorganosiloxane, provided that the sum of b & c must be greater than 0.
Dependencies are inferred from the claim text.