Coating compositions
AssigneeEssential Industries, Inc.
InventorsJay M. Shaffer, Emily R. Dybdahl, Michael R. Underwood, Jr.
Life of this patent
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Abstract
A surface finish composition including a silica-bonded reversibly cross-linked co-polymer and a water-dispersible polyurethane. The silica-bonded reversibly cross-linked co-polymer includes a base co-polymer including monomers derived from one or more ethylenic polymerizable monomers and an alkoxysilyl acrylate; a reversible cross-linking agent; and a silica nanoparticle bonded to the base co-polymer. The amount of water-dispersible polyurethane is 15-50% by weight of the combined amount of water-dispersible polyurethane and base co-polymer.
Claims20
A surface finish composition comprising:
- a) a silica-bonded reversibly cross-linked co-polymer comprising
- i) a base co-polymer comprising monomers derived from one or more ethylenic polymerizable monomers and an alkoxysilyl acrylate of formula (I)
- wherein R1 is hydrogen or C1-4alkyl, R2 is C1-4alkyl, and n is 1-3;
- ii) a reversible cross-linking agent;
- and
- iii) a plurality of silica nanoparticles bonded to the base co-polymer, wherein the silica nanoparticles have surface silanol groups in an amount of about 40 mole % relative to the monomers derived from the alkoxysilyl of formula (I);
- and
- b) a water-dispersible polyurethane;
- wherein the amount of water-dispersible polyurethane is 15-50% by weight of the combined amount of water-dispersible polyurethane and base co-polymer.
A surface finish composition prepared by
- combining a reversibly cross-linked co-polymer with silica nanoparticles in a solvent, wherein the reversibly cross-linked co-polymer comprises a reversible cross-linking agent and a base co-polymer comprising monomers derived from one or more ethylenic polymerizable monomers and an alkoxysilyl acrylate of formula (I)
- wherein R1 is hydrogen or C1-4alkyl, R2 is C1-4alkyl, and n is 1-3;
- and the silica nanoparticles comprise, surface silanol groups in au amount of about 40 mole % relative to the monomers derived from the alkoxysilyl acrylate of formula (I);
- reacting the reversibly cross-linked co-polymer with the silica nanoparticles to form a covalent bond between a surface silanol group and the silicon atom derived from a monomer of formula (I) to provide a silica-bonded reversibly cross-linked co-polymer;
- and
- blending the silica-bonded reversibly cross-linked co-polymer with a water-dispersible polyurethane, wherein the amount of the water-dispersible polyurethane is 15-50% by weight of the total amount of water-dispersible polyurethane and base co-polymer.
A method of preparing a surface finish composition comprising
- combining a reversibly cross-linked co-polymer with a silica nanoparticle in a solvent, wherein the reversibly cross-linked co-polymer comprises a reversible cross-linking agent and a base co-polymer comprising monomers derived from one or more ethylenic polymerizable monomers and an alkoxysilyl acrylate of formula (I)
- wherein R1 is hydrogen or C1-4alkyl, R2 is C1-4alkyl, and n is 1-3;
- and the silica nanoparticles comprises surface silanol groups in an amount of about 40 mole % relative to the monomers derive from the alkoxysilyl acrylate of formula (I);
- reacting the reversibly cross-linked co-polymer with the silica nanoparticles to form a covalent bond between a surface silanol group and the silicon atom derived from a monomer of formula (I) to provide a silica-bonded reversibly cross-linked co-polymer;
- and
- blending the silica-bonded reversibly cross-linked co-polymer with a water-dispersible polyurethane, wherein the amount of the water-dispersible polyurethane is 15-50% by weight of the total amount of water-dispersible polyurethane and base co-polymer.
Dependencies are inferred from the claim text.