Curable coating compositions from emulsions of elastomeric polymers and polyurethane dispersions
AssigneeDow Corning Corporation
InventorsShaow Burn Lin, Anne Katja Shim, David Shawn Tascarella
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Abstract
A curable coating composition comprises: (A) a water continuous emulsion comprising a curable elastomeric polymer having a viscosity of 0.5-1,000,000 KPa-s and a glass transition temperature up to 50° C.; (B) an aqueous polyurethane dispersion; and optionally, (C) a cure agent. Methods for preparing the curable coating compositions are also disclosed. The curable coating composition and the cured coatings derived from the reaction product of this composition are useful as fabric coatings, and in particular for decreasing air permeability of the coated fabrics at relatively lower coating weights.
Claims37
A curable coating composition comprising:
- (A) a water continuous emulsion comprising a curable elastomeric polymer having a viscosity of 0.5-1,000,000 KPa-s and a glass transition temperature up to 50° C.;
- (B) an aqueous polyurethane dispersion;
- and optionally,
- (C) a cure agent.
A method for making a curable coating composition comprising mixing;
- (A) a water continuous emulsion comprising a curable elastomeric polymer having a viscosity of 0.5-1,000,000 KPa-s and a glass transition temperature up to 50° C.;
- (B) an aqueous polyurethane dispersion;
- and optionally,
- (C) a cure agent.
A method for making a curable coating composition comprising;
- I) mixing
- (A) a water continuous emulsion comprising a curable elastomeric polymer having a viscosity of 0.5-1,000,000 KPa-s and a glass transition temperature up to 50° C.;
- with an alkaline additive to form a pH adjusted water continuous emulsion having a pH of at least 6.0;
- II) further mixing the pH adjusted water continuous emulsion, with
- (B) an aqueous polyurethane dispersion;
- and optionally,
- (C) a cure agent.
Dependencies are inferred from the claim text.