Hydrophobically modified polymers containing vinylamine...

C - Chemistry – Metallurgy – 08 – F

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C08F 8/00 (2006.01) C08G 81/02 (2006.01) C08G 85/00 (2006.01)

Patent

CA 2485113

The invention relates to hydrophobically modified polymers, which contain vinylamine units or ethylenimine units and can be obtained by reacting: (a) polymers containing vinylamine units or ethylenimine units with; (b) compounds of formula (I) R - A - (EO, PO, BuO)n - X, in which: R represents C4 to C26 alkyl or C4 to C26 alkenyl; A represents O, NH, COO; EO represents an ethylene oxide unit; PO represents a propylene oxide unit, BuO represents a butylene oxide unit, n ranges from 1 to 250, and; X represents a functional group that can be covalently bonded to an OH group. The invention also relates to a method for producing hydrophobically modified polymers, which contain vinylamine units or ethylenimine units, by reacting polymers containing vinylamine units or ethylenimine units with at least one hydrophobing agent of formula (I), and to the use of polymers obtained in this manner as an additive to paper pulp during the production of paper.

L'invention concerne des polymères contenant des unités vinylamine ou éthylénimine modifiées de façon hydrophobe, obtenues par transformation (a) de polymères contenant des unités vinylamine ou éthylénimine avec (b) des composés de formule (I) R - A - (EO, PO, BuO)n X, dans laquelle R est C4- à C26-alkyl ou C4- à C26-alkényl, A est O, NH, ou COO, EO est une unité éthylénoxyde, PO est une unité propylénoxyde, BuO est une unité butylénoxyde, n est 1 à 250, et X est un groupe fonctionnel pouvant être combiné de façon covalente à un groupe OH. L'invention concerne également un procédé de fabrication de polymères contenant des unités vinylamine ou éthylénimine modifiées de façon hydrophobe, par transformation de polymères contenant des unités vinylamine ou éthylénimine avec au moins un agent d'hydrophobation de formule (I), ainsi que l'utilisation des polymères ainsi obtenus en tant qu'additifs de pâte à papier dans la fabrication de papier.

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