| 主权项 |
1. An acrylic polymer blend comprising from about 20% to about 95% by weight of at least one crosslinked acrylic copolymer and from about 80% to about 5% by weight of at least one acrylic linear, non-crosslinked polymer, based on the total weight of active polymer solids in the blend, wherein
I) said linear polymer is polymerized from a monomer selected from:
a) from about 10% to about 90% by weight of at least one carboxylic acid monomer comprising acrylic acid, methacrylic acid, itaconic acid, fumaric acid, crotonic acid, aconitic acid, or maleic acid, or combinations thereof;b) from about 90% to about 20% by weight of at least one C1 to C5 alkyl ester and/or at least one C1 to C5 hydroxyalkyl ester of acrylic acid or methacrylic acid; and optionallyc) from about 1% to about 35% by weight of at least one α,β-ethylenically unsaturated monomer selected from a monomer represented by the formulas:
CH2═C(R)C(O)OR1, i)wherein R is selected from hydrogen or methyl; and R1 is selected from C6-C10 alkyl, C6 to C10 hydroxyalkyl, —(CH2)2OCH2CH3, and —(CH2)2C(O)OH and salts thereof;
CH2═C(R)X, ii)wherein R is hydrogen or methyl; and X is selected from —C6H5, —CN, —C(O)NH2, —NC4H6O, —C(O)NHC(CH3)3, —C(O)N(CH3)2, C(O)NHC(CH3)2(CH2)4CH3, and —C(O)NHC(CH3)2CH2S(O)(O)OH and salts thereof;
CH2═CHOC(O)R1, iii)wherein R1 is linear or branched C1-C18 alkyl; and
CH2═C(R)C(O)OAOR2, iv)wherein A is a divalent radical selected from —CH2CH(OH)CH2— and —CH2CH(CH2OH)—, R is selected from hydrogen or methyl, and R2 is an acyl residue of a linear or branched, saturated or unsaturated C10 to C22 fatty acid; and wherein
II) said crosslinked polymer is polymerized from a monomer selected from;
a1) from about 20% to about 80% by weight of at least one carboxylic acid monomer comprising acrylic acid, methacrylic acid, itaconic acid, fumaric acid, crotonic acid, aconitic acid, or maleic acid, or combinations thereof;b1) from about 80% to about 15% by weight of at least one C1 to C5 alkyl ester and/or at least one C1 to C5 hydroxyalkyl ester of acrylic acid or methacrylic acid;c1) from about 0.01% to about 5% by weight of at least one crosslinking monomer; and optionallyd1) from about 1% to about 35% by weight of at least one α,β-ethylenically unsaturated monomer selected from formulas i) to iv) above. |
