C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 8/00 (2006.01) C08G 73/02 (2006.01) D21H 21/10 (2006.01) D21H 21/18 (2006.01) D21H 21/20 (2006.01) D21H 17/34 (2006.01)
Patent
CA 2268755
The invention relates to a method for producing polymers containing carbamate units, wherein polyethylene imines or polymers containing vinyl amine units of formula (III) in which R1 = H or C1-C6-alkyl are made to react with halogen formic acid esters. The invention also relates to the use of the polyethylene imines containing carbamate groups thus obtained or polymers containing vinyl carbamate units as retention agents, dehydrating agents, flocculants and fixing agents in the production of paper, as a protective colloid for the production of aqueous alkyl diketene dispersions and as a dispersing agent for the production of accumulated aqueous filling material slurries.
L'invention concerne un procédé de préparation de polymérisats contenant des unités carbamate, selon lequel on fait réagir avec des esters d'halogénure d'acide formique, des imines de polyéthylène ou des polymérisats contenant des unités vinylamine de la formule (III), dans laquelle R<1> = H ou alkyle C1-C6. L'invention concerne également l'utilisation des imines de polyéthylène contenant des groupes carbamate, ainsi obtenus ou des polymérisats contenant des unités carbamate vinylique, comme agents de rétention, de déshydratation et de flocage, ainsi que comme agents de fixation dans le cadre de la fabrication du papier, comme colloïde protecteur pour la préparation de dispersions de dicétène d'alkyle et comme agents de dispersion pour préparer des boues de charge aqueuses.
Lorencak Primoz
Niessner Manfred
Stamm Armin
Utecht Jens
Weiguny Sabine
Basf Aktiengesellschaft
Borden Ladner Gervais Llp
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