C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 2/04 (2006.01) C08F 2/48 (2006.01) C08F 6/00 (2006.01) C08F 26/02 (2006.01)
Patent
CA 2735064
The present invention provides a process for producing an N-vinylamide polymer in an efficient manner by an aqueous solution polymerization method in which a gel-like polymer having an excellent handling property can be produced, and a polymerization time can be shortened. The process for producing an N-vinylamide polymer by subjecting a monomer component comprising N-vinylamide to aqueous solution polymerization according to the present invention comprises the step of polymerizing the monomer component comprising N- vinylamide in the presence of an inorganic salt, which inorganic salt is present in an amount of not less than 7% by mass based on water in a uniform aqueous solution comprising the monomer component at a concentration not more than a saturated solution concentration thereof as measured at a polymerization initiation temperature.
Linvention concerne un procédé de fabrication dun polymère damide dacide N-vinylcarboxylique par polymérisation en solution aqueuse. Un gel polymère ayant une excellente maniabilité est produit efficacement par le procédé avec un temps de polymérisation réduit. Le procédé de fabrication dun polymère damide dacide N-vinylcarboxylique est caractérisé en ce que lorsquun monomère contenant un amide dacide N-vinylcarboxylique est soumis à une polymérisation en solution aqueuse, le monomère contenant un amide dacide N-vinylcarboxylique est polymérisé en présence dun sel inorganique dune concentration supérieure ou égale à 7 % en masse, mais inférieure ou égale à la concentration de la solution saturée à la température de départ de la polymérisation par rapport à leau dans la solution aqueuse uniforme contenant le monomère.
Dia-Nitrix Co. Ltd.
Goudreau Gage Dubuc
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