Claims
- 1. An aqueous polymeric dispersion comprising:(A) water, having dispersed therein: (B) the mixture of: (i) an acrylic polyol having hydrophilic groups; (ii) a polyol hydrosilylation reaction product of an alkylpolysiloxane and an unsaturated hydroxyalkyl compound; (iii) a polyisocyanate component.
- 2. The composition of claim 1 wherein the polyisocyanate component (iii) comprises a hydrophobic, aromatic group-containing polyisocyanate containing at least two reactive isocyanate groups, at least one of which is a tertiary isocyanate group.
- 3. The composition of claim 1 wherein the acrylic polyol (i) comprises an acrylic copolymer having a glass transition temperature of at least about 0° C., prepared from a mixture of polymerizable ethylenically unsaturated monomers containing from about 5 to about 80 percent by weight, based on the total solid weight of monomers used to prepare the acrylic copolymer, of an ethylenically unsaturated aromatic monomer.
- 4. The composition of claim 3 wherein the ethylenically unsaturated aromatic monomer is selected from the group consisting of styrene, alpha-methyl styrene, substituted styrene, substituted alpha-methyl styrene and ethylenically unsaturated monomers containing fused aryl rings.
- 5. The composition of claim 3 wherein the mixture of ethylenically unsaturated monomers contains about 5 to about 80 percent by weight, based on the total solid weight of monomers, of an ethylenically unsaturated, hydroxyl functional monomer.
- 6. The composition of claim 5 wherein the ethylenically unsaturated, hydroxyl functional monomer comprises hydroxyalkyl acrylate or hydroxyalkyl methacrylate.
- 7. The comoposition of claim 1 wherein the polyisocyanate component (iii) comprises a urethane adduct of a polyol with a diisocyanate containing at least one tertiary isocyanate group.
- 8. The composition of claim 7 wherein the polyol used to make the urethane adduct is trimethylolpropane.
- 9. The composition of claim 8 wherein the diisocyanate used to make the urethane adduct is meta-α,α,α′,α′-tetramethylxylylenediisocyanate.
- 10. The composition of claim 1 wherein the polyol (ii) is the reaction product of an alkyldisiloxane and a vinyl-terminated alkoxyalkanol.
- 11. The composition of claim 10 wherein the alkyldisiloxane is tetramethyldisiloxane and the vinyl-terminated alkoxyalkanol is allyloxyethanol.
- 12. A curable film-forming composition comprising an aqueous medium having dispersed therein a polymeric composition comprising, as the primary film-forming component the reaction product of:(i) an acrylic polyol having hydrophilic groups; (ii) a polyol hydrosilylation reaction product of an alkyldisiloxane and an unsaturated hydroxyalkyl compound; (iii) a polyisocyanate component.
- 13. The composition of claim 12 wherein the polyisocyanate component (iii) comprises a hydrophobic, aromatic group-containing polyisocyanate containing at least two reactive isocyanate groups, at least one of which is a tertiary isocyanate group.
- 14. The composition of claim 12 wherein the acrylic polyol (i) comprises an acrylic copolymer having a glass transition temperature of at least about 0° C., prepared from a mixture of polymerizable ethylenically unsaturated monomers containing from about 5 to about 80 percent by weight, based on the total solid weight of monomers used to prepare the acrylic copolymer, of an ethylenically unsaturated aromatic monomer.
- 15. The composition of claim 14 wherein the ethylenically unsaturated aromatic monomer is selected from the group consisting of styrene, alpha-methyl styrene, substituted styrene, substituted alpha-methyl styrene and ethylenically unsaturated monomers containing fused aryl rings.
- 16. The composition of claim 14 wherein the mixture of ethylenically unsaturated monomers contains about 5 to about 80 percent by weight, based on the total solid weight of monomers, of an ethylenically unsaturated, hydroxyl functional monomer.
- 17. The composition of claim 16 wherein the ethylenically unsaturated, hydroxyl functional monomer comprises hydroxyalkyl acrylate or hydroxyalkyl methacrylate.
- 18. The composition of claim 12 wherein the polyisocyanate component (iii) comprises a urethane adduct of a polyol with a diisocyanate containing at least one tertiary isocyanate group.
- 19. The composition of claim 18 wherein the polyol used to make the urethane adduct is trimethylolpropane.
- 20. The composition of claim 18 wherein the diisocyanate used to make the urethane adduct is meta-α,α,α′,α′-tetramethylxylylenediisocyanate.
- 21. The composition of claim 12 wherein the polyol (ii) is the reaction product of an alkyldisiloxane and a vinyl-terminated alkoxyalkanol.
- 22. The composition of claim 21 wherein the alkyldisiloxane is tetramethyldisiloxane and the vinyl-terminated alkoxyalkanol is allyloxyethanol.
CROSS-REFERENCE TO RELATED APPLICATION
This application claims the benefit of U.S. Provisional Application Serial No. 60/258,927, filed Dec. 29, 2000, which is hereby incorporated by reference.
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Provisional Applications (1)
|
Number |
Date |
Country |
|
60/258927 |
Dec 2000 |
US |