Crosslinked water-soluble polymer dispersions

Details Crosslinked water-soluble polymer dispersions Crosslinked water-soluble polymer dispersions

C - Chemistry, Metallurgy

08

F

C08F 2/20 (2006.01) B01D 21/01 (2006.01) C02F 1/56 (2006.01) C08F 2/10 (2006.01) C08L 33/00 (2006.01) D21H 17/45 (2006.01) D21H 21/10 (2006.01)

Patent

CA 2143564

A method of producing low-viscosity water-based water- soluble polymer dispersions having a high concentration of the principal substance is achieved by polymerizing the following monomer components, (a1) 50-99.999 wt.% of at least one water-soluble monomer; (a2) 0.001-1 wt.% of at least one crosslinking monomer with at least two ethylenically unsaturated radically polymerizable groups; (a3) 0-30 wt.%, particularly 1-25 wt.%, of at least one hydrophobic monomer; and (a4) 0-25 wt.%, particularly 0.1-15 wt.%, of at least one amphiphilic monomer, in aqueous solution, in the presence of at least one polymer dispersant, to form a polymer (A), where the sum of the amounts of the components represented by the monomers (a1), (a2), (a3), and (a4) is 100 wt.% of the monomers, the weight average molecular weight of the resulting polymer (A) is at least 500,000 Dalton, and polymer (A) is incompatible with the dispersant.

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