Water soluble graft copolymers for laser print deinking loop...

Details Water soluble graft copolymers for laser print deinking loop... Water soluble graft copolymers for laser print deinking loop...

D - Textiles, Paper

21

C

D21C 11/00 (2006.01) C02F 1/56 (2006.01)

Patent

CA 2135694

A method for clarifying the laser print deinking loop water and the recycled process water containing recycled fiber in a papermaking proc- ess by using a water soluble graft copolymer having the structure: Image wherein E is the repeat unit obtained after polymerization of an .alpha., .beta.ethylenically unsaturated compound, the molar percentage of a:b is from about 95:5 to 5:95, with the proviso that the sum of a and b equals 100%; G comprises the structure: Image wherein d is a cationic monomer, R1, R2 and R3 are the same or different and are hydrogen or a lower alkyl group having C1 to C3. F is a salt of an ammonium cation and the molar percentage of c:d is from 95:5 to 5:95 with the proviso that the sum of c and d equals 100%.

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