C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/397
C08F 2/32 (2006.01)
Patent
CA 1296475
Abstract of the Disclosure: Polymers in bead form are prepared from water-soluble ethylenically unsaturated monomers by a reverse suspension polymerization of an aqueous solution of the monomers in an inert hydrophobic liquid in the presence of polymerization initiators and protective colloids obtainable by grafting polymers A) containing a) from 40 to 100% by weight of an aromatic monovinyl monomer b) from 0 to 60% by weight of a monoethylenically unsatu- rated carboxylic acid of 3 to 6 carbon atoms and/or maleic anhydride and c) from 0 to 20% by weight of other monoethylenically unsaturated monomers, as copolymerized units with the proviso that the sum of the weight percentages (a) to (c) is always 100 and the polymer A) has a molecular weight (number average) from 500 to 20 000 and a hydrogenation iodine number (as defined in German Standard Specification DIN 53,241) from 1.3 to 51 with a monomer mixture of (1) from 70 to 100% by weight of an acrylic ester and/or methacrylic ester of a monohydric alcohol containing from 1 to 20 carbon atoms, (2) from 0 to 15% by weight of a monoethylenically unsatu- rated carboxylic acid of 3 to 6 carbon atoms maleic anhydride and/or itaconic anhydride, (3) from 0 to 10% by weight of an acrylic monoester and/ or methacrylic monoester of a not less than 2-hydric alcohol, (4) from 0 to 15% by weight of an aromatic monovinyl monomer and (5) from 0 to 7.5% by weight of acrylamide and/or meth- acrylamide with the proviso that the sum of the weight percentages (1) to (5) is always 100, at up to 150°C in an inert hydrophobic diluent in the presence of a polymerization initiator the monomers being used in an amount from 97.5 to 50% by weight based on the mixture of polymer A) and monomers.
561443
Hartmann Heinrich
Heide Wilfried
Niessner Manfred
Peters Karl-Clemens
Rehmer Gerd
Basf Aktiengesellschaft
Robic
LandOfFree
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