Use of dispersion polymers for coated broke treatment

Details Use of dispersion polymers for coated broke treatment Use of dispersion polymers for coated broke treatment

1993-11-17

1995-11-14

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-fiber additive

1621683, 162191, D21H 1745

Patent

active

054663385

ABSTRACT:
A process for treating a re-pulped coated broke slurry comprising the addition of a water-soluble polymer dispersion, the water-soluble polymer is formed by polymerizing a water-soluble mixture which comprises: (a) a first cationic monomer represented by the following formula (I): ##STR1## and/or a second cationic monomer represented by the following general formula (II): ##STR2## and (b) (meth)acrylamide in an aqueous solution of a polyvalent anion salt, wherein the polymerization is carried out in the presence of either an organic high-molecular multivalent cation comprising a water-soluble polymer containing at least one monomer of formula (II) or an alkyl ester of acrylic acid.

REFERENCES:
patent: 4268352 (1981-05-01), Cosper et al.
patent: 4929655 (1990-05-01), Takeda et al.
patent: 5131982 (1992-07-01), St. John
patent: 5300194 (1994-04-01), Welkener et al.

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