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    • 5. 发明专利
    • BR0103354A
    • 2002-03-26
    • BR0103354
    • 2001-08-14
    • BAYER AG
    • HAUSCHEL BERNDBUCHHOLZ VERATHIELE BERNDKIJLSTRA JOHAN
    • C08F2/24C08F2/28C08F212/06C08F220/10C08F257/02D21H17/45D21H21/16
    • Cationic fine particulate polymer dispersion is prepared by polymerization of a monomer mixture comprising (wt.%): (A) optionally substituted styrene (20-60); (B) 1-18C (meth)acrylic acid ester (40-80); and (C) non-ionic ethylenically unsaturated monomers different to (A) and (B) (0-20). The polymerization takes place in the presence of an aqueous polymer dispersion. Cationic fine particulate polymer dispersion (I) is prepared by polymerization of a monomer mixture comprising: (A) 20-60 wt.% of an optionally substituted styrene; (B) 40-80 wt.% of a 1-18C (meth)acrylic acid ester; and (C) 0-20 wt.% of non-ionic ethylenically unsaturated monomers different to (A) and (B) (where the sum of (A), (B) and (C) is 100 wt.%). The polymerization takes place in the presence of an aqueous polymer dispersion prepared by solution polymerization of a monomer mixture comprising (D), (E) and (F) in a saturated 1-6C carboxylic acid whereby the mixture comprises (D) 15-35 wt.% of a (meth)acrylic acid ester and/or (meth)acrylamide containing a tertiary amine group (E) 65-85 wt.% of an optionally substituted styrene and (F) 0-20 wt.% of a non-ionic or cationic ethylenically unsaturated monomer different to (D) and (E) where the sum of (D), (E) and (F) is 100%.