| 摘要 |
A film may be formed from film forming compositions which comprise at least one carboxamide based coalescing solvent. These coalescing solvents impart equivalent or improved wet-scrub resistance, block resistance, gloss, dirt pick-up resistance and leveling characteristics to the films on a substrate, without contributing to total VOC levels, when replacing conventional coalescing solvents. The present invention also includes a method for forming a film comprising applying a film forming composition comprising polyunsaturated reactive carboxamides to a substrate and curing the film under ambient conditions. The coalescing carboxamide solvents are suitable for paint, latex based caulk, adhesives and floor care applications. |
| 主权项 |
1. A film forming composition comprising
(i) a latex comprising polymer particles dispersed in a water phase; (ii) at least one carboxamide selected from the group consisting of: wherein: R1, X, Y and Z are the same or different and are independently selected from the group consisting of hydrogen and an optionally substituted straight-chain, branched or cyclic, saturated or unsaturated hydrocarbyl group or heterohydrocarbyl group having from 1 to about 25 carbon atoms, with the proviso that at least one of R1, X, Y and Z is not hydrogen; R2, R3, R4 and R5 are each independently selected from hydrogen and a hydrocarbyl group of from 1 to 8 carbon atoms; Q is selected from the group consisting of O, S and N—R6; wherein R6 is selected from the group consisting of hydrogen and an optionally substituted straight-chain, branched or cyclic, saturated or unsaturated hydrocarbyl group or heterohydrocarbyl group having from 1 to about 25 carbon atoms; R7 is an optionally substituted straight-chain, branched or cyclic, saturated or unsaturated hydrocarbyl group of from 1 to 12 carbon atoms; n and m are the same or different and are zero, 1, 2, 3 or 4; and m+n is from 2 to 4 (iii) a pigment; wherein the latex of the film forming composition exhibits a minimum film forming temperature of less than 20° C., and the composition has a latex to pigment weight ratio of at least 0.5. |
