C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 1/56 (2006.01) C02F 1/54 (2006.01) C08F 290/04 (2006.01)
Patent
CA 2151973
A method for clarifying deinking process water in a papermaking process 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 19 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%.
Chen Fu
Harrington John C. IV
Liao Wen P.
Schuster Michael A.
Betzdearborn Inc.
Borden Ladner Gervais Llp
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