Process for preparing a polymer dispersion

Details Process for preparing a polymer dispersion Process for preparing a polymer dispersion

2007-05-22

2007-05-22

Egwim, Kelechi C. (Department: 1713)

Paper making and fiber liberation

Processes and products

Non-fiber additive

C162S157600, C162S158000, C162S168200, C162S183000, C524S458000, C524S650000, C524S815000, C524S827000

Reexamination Certificate

active

11450338

ABSTRACT:
The present invention relates to a process for preparing an aqueous polymer dispersion comprising: preparing a dispersant co-polymer of a monomer mixture (M) by polymerising the monomer mixture (M) in a reaction medium which is substantially free from organic solvents and/or substantially free from monomers which are not soluble in water, the monomer mixture (M) comprises at least one cationic vinyl monomer (m3) and at least one monomer (m4) which is tetrahydrofurfuryl acrylate, tetrahydrofurfuryl methacrylate, or a monomer of the general formula (I):wherein R1is hydrogen or methyl, R2is hydrogen or C1-C2alkyl, R3is hydrogen, C1-C4alkyl, phenyl, or benzyl, n=1 to 4, and x=1 to 50, and then, polymerising one or more water-soluble monomers (m) in an aqueous solution of a salt in the presence of the obtained dispersant polymer. The invention also relates to an aqueous polymer dispersion, use of the dispersion and a process for the production of paper.

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