Process for the production of paper sizing agents

Details Process for the production of paper sizing agents Process for the production of paper sizing agents

C - Chemistry, Metallurgy

08

F

402/301

C08F 222/06 (2006.01) C08F 210/14 (2006.01) D21H 17/43 (2006.01)

Patent

CA 1109999

A PROCESS FOR THE PRODUCTION OF PAPER SIZING AGENTS Abstract of the Disclosure An improved process for the production of a substantially equimolecular copolymer of maleic acid anhydride and diiso- butylene in which from 10 to 100 mole % of the anhydride groups are esterified with linear or branched aliphatic monoalcohols containing from 1 to 20 carbon atoms or with cycloaliphatic monoalcohols containing from 5 to 6 carbon atoms to form the corresponding semiesters, wherein shortly before or after the end of the solution or suspension copolymerisation of maleic acid anyhdride and diisobutylene a monomer corresponding to the general formula Image in which R = H, CH3, C2H5, -OR2, -O-CO-CH3, Image Image Image R1 = H , CH3 and R2 = a linear or branched alkyl group containing from 1 to 4 carbon atoms, or mixtures of these monomers with one another are added to the polymerisation mixture in quantities of from 1 to 12 mole %, based on the maleic acid anhydride used. The aqueous or aqueous- alcoholic alkali, amine or ammonium salt solutions of the semiesters of the copolymer are highly effective as anionic sizing agents for paper.

295041

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