| 摘要 |
Copolymers of monomer as follows:… (1)at least 10 weight percent of one or more of the following monomers: methacrylic acid, itaconic acid, acrylic acid, acryloxypropionic acid, fumaric acid, maleic acid, citraconic acid and/or crotonic acid;… (2) 0.5 to 25 weight percent of one or more of the monomers of the formula:… H2C=CH-C(O)-NH-R… wherein R is alkyl, alkylaryl, and/or polycyclic alkyl groups having 8 to 30 carbon atoms;… (3) optionally one or more of the copolymerizable ethylenically unsaturated monomers of the formula:… H2C=CYZ… wherein (a) Y is H and Z is COOR<2>, C6H4H<3>, CN, Cl, CONH4, OC(O)R<4> or CH=CH2;… (b) Y is C1-C4 alkyl and Z is COOR<2>, C6H4R<4>, CN, CONH2, or CH=CH; or… (c) Y and Z are C1; and… R<2> is C1-C8 alkyl or C2-C8 hydroxyalkyl or lower alkoxy (C2-C8)-alkyl;… R<3> is H, Cl, Br, or C1-C4 alkyl; and… R<4> is C1-C8 alkyl; and… (4) zero to 1.0 weight percent of one or more polyethylenically unsaturated monomers,… when at least partially neutralised and solubilised by additions of alkali are effective thickeners for aqueous systems. Surfactants enhance the thickening pertormance of the partially neutralised copolymers. Typical systems to which this thickening can usefully be applied include paint latices, cosmetics, pigment dispersions, oil well drilling fluids, textile printing pastes. dentifrices, hand lotions, liquid detergents and pharmaceuticals. |
