Polyurea macromer and latexes thereof

摘要

The present invention is a composition comprising a) a stable aqueous dispersion of polymer particles having one or more structural units of i) a polyurea macromer; and ii) an acrylate, a methacrylate, a vinyl ester, or a styrene monomer, or a combination thereof; and/or b) an aqueous mixture of a i) polyurea macromer polymer particles; and b) acrylate, methacrylate, vinyl ester, or styrenic polymer particles, or a combination thereof, wherein the polyurea macromer is characterized by the following formula I:;
where A1, A2, R1, R2, and R3 are as defined herein. Compositions prepared using the compound of the present invention can be used to form coatings with excellent balance of low temperature film formation, hardness, and flexibility.

主权项

1. A composition comprising a) a stable aqueous dispersion of polymer particles having one or more structural units of i) a polyurea macromer; and ii) an acrylate, a methacrylate, a vinyl ester, or a styrene monomer, or a combination thereof; and/or b) an aqueous mixture of a i) polyurea macromer particles and b) acrylate, methacrylate, vinyl ester, or styrenic polymer particles, or a combination thereof, wherein the polyurea macromer is characterized by the following formula I: wherein n is 1 to 20; R1, R2, and R3 are each independently a C2-C20 alkanediyl group, a C3-C20 cycloalkanediyl group, a C6-C20 arenediyl group, or a C7-C20 aralkanediyl group; X and Y are independently O or NR4, wherein R4 is H or C1-C6-alkyl, with the proviso that at least one of X and Y is NH; at least one of A1 and A2 is —C(O)—(Z)m—R5; —CH2CH(OH)R6; —CR7═CH—C(O)O(CH2)pR8; —C(O)—Y′—(CH2)pR9; or CH2—CH2—C(O)—O—R10; wherein each R5 is independently a C2-C20 alkyl group, a C3-C20 cycloalkyl group, a C6-C20 aryl group, or a C7-C20 aralkyl group, with the proviso that at least one R5 is functionalized with a carboxylic acid group or a polymerizable olefin group or both; each R6 is independently —CH2-acrylate, —CH2-methacrylate, or —(CH2)p—COOH; each R7 is independently H or CH3; each R8 is independently an acrylate group, a methacrylate group, or COOH; each R9 is independently an acrylate group or a methacrylate group; each R10 is independently H or —CH2CH═CH2; Y′ is O or NR4; m is 0 or 1; each p is independently from 2 to 6; and the compound has an Mn in the range of 500 to 8,000 Daltons.