Silicone rubber emulsion coating
AssigneePerformance Chemicals LLC
InventorsMichael Robert CURRIER, Matthew Michael CURRIER, Robert Thorton CURRIER
Life of this patent
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Abstract
The system and method for a water-based dispersion of silicone rubber and catalyst for use as a coating. The coating is useful on a wide variety of surfaces and may contain polytetrafluoroethylene (PTFE) and/or ammonium polyphosphate. The silicone rubber emulsion coatings have several notable features. First, it is dilutable with water, thus eliminating hazardous solvents and cosolvents. Second, it has low volatility. Third, it is not a fire or VOC hazard. Fourth, it forms an elastomeric film on a wide range of substrates. Fifth, it is easily applied using a spray, roll, coating, or brush.
Claims20
A method of making a silicone coating, comprising:
- emulsifying a silicone polymer into an aqueous solution to form a silicone emulsion;
- emulsifying an organometallic fatty acid catalyst and surfactants to form a catalytic emulsion;
- and
- mixing the silicone emulsion and the catalytic emulsion to form a silicone dispersion, wherein the silicone dispersion has a particle size of about 0.5-7 microns.
A silicone coating, comprising:
- a first component comprising a silicone polymer in an aqueous emulsion;
- and
- a second component comprising an organometallic fatty acid catalyst and surfactants;
- wherein the first and second component each have a particle size of about 0.5-7 microns and when the first and second component are mixed, form a silicone dispersion that is cross-linkable in air when applied to a substrate.
A method of using a silicone coating, comprising:
- applying a silicone dispersion to a substrate, the silicone dispersion comprising a silicone polymer in an aqueous emulsion and an organometallic fatty acid catalyst and surfactants;
- and
- cross-linking the silicone dispersion in ambient air to form a silicone rubber emulsion coating;
- wherein the silicone dispersion has a particle size of about 0.5-5 microns, a nonvolatile content of about 1%-50% wt/wt;
- a pH in a range of about 3.5-6.5;
- a viscosity in a range of about 1.0-10,000 mPa*s.
Dependencies are inferred from the claim text.