| 摘要 |
PCT No. PCT/EP96/05522 Sec. 371 Date Jun. 2, 1998 Sec. 102(e) Date Jun. 2, 1998 PCT Filed Dec. 11, 1996 PCT Pub. No. WO97/21744 PCT Pub. Date Jun. 19, 1997The disclosure relates to a copolymer obtainable by radically initiated polymerization of the following: A) 70-99.9 wt. % an olefinically unsaturated C3-C5 monocarboxylic acid, an olefinically unsaturated C4-C8 dicarboxylic acid or its anhydride, or a mixture of such carboxylic acids; with B) 0.1-30 wt. % one or more multiply olefinically unsaturated carboxylic acid derivatives of formula (I)Z-Y-(CHR3-CH2-X)n-R4(I)in which Z is a vinyl or allyl group or structure (a), R1, R2 are hydrogen or methyl, R3 is hydrogen, methyl or ethyl, R4 is a singly or multiply olefinically unsaturated alkenyl or cycloalkenyl group or a singly or doubly olefinically unsaturated arylalkylene group, X is oxygen or NH, Y is oxygen, NH or N-alkyl, n is a number between 0 and 50; and C) 0-29.9 wt. % other copolymerizable monomers. The proposed copolymer can be used as a thickener or dispergent for aqueous systems. |
