C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 251/00 (2006.01) C08B 31/00 (2006.01) C08F 251/02 (2006.01) C08F 279/02 (2006.01) C08F 279/04 (2006.01) C08L 51/02 (2006.01) C08L 55/02 (2006.01) C09D 151/02 (2006.01) C09D 155/02 (2006.01) D21H 19/54 (2006.01) D21H 19/58 (2006.01)
Patent
CA 2742885
What is described is a method for preparing aqueous polymer dispersions, wherein a vinyl aromatic compound such as styrene, a conjugated aliphatic diene such as butadiene and an ethylenically unsaturated carboxylic acid nitrile such as acetonitrile are copolymerized in an aqueous medium. The copolymerization is done in the presence of a decomposed starch and radical-forming initiators. At least a portion of the various monomers of ethylenically unsaturated carboxylic acid nitriles are polymerized before the ethylenically unsaturated carboxylic acid nitriles are added to the polymerization mixture.
L'invention concerne un procédé de production de dispersions polymères aqueuses, procédé selon lequel un composé vinylaromatique, tel que le styrène par exemple, un diène aliphatique conjugué, tel que le butadiène par exemple, et un nitrile carboxylique éthyléniquement insaturé, tel que l'acrylnitrile, sont copolymérisés en milieu aqueux. La copolymérisation s'effectue en présence d'un amidon dégradé et d'initiateurs formant des radicaux. Au moins une partie des divers monomères de nitriles carboxyliques éthyléniquement insaturés est polymérisée avant que les nitriles éthyléniquement insaturés soient ajoutés au mélange de polymérisation.
Evstatieva Elitsa
Lawrenz Dirk
Schmidt-Thuemmes Juergen
Basf Se
Robic
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