Phosphorus-containing copolymers, method for the production...

Details Phosphorus-containing copolymers, method for the production... Phosphorus-containing copolymers, method for the production...

C - Chemistry, Metallurgy

08

F

C08F 220/00 (2006.01)

Patent

CA 2598767

Disclosed are copolymers which are obtained by radically copolymerizing a vinylic poly(alkylene oxide) compound (A) with an ethylenically unsaturated monomer compound (B). Also disclosed is the use of said copolymers as a dispersing agent for aqueous solid suspensions, especially hydraulic binders based on cement, lime, gypsum, and anhydrite. The inventive copolymers barely delay the hardening process of the concrete and ensure long processability of the concrete while providing a very good water reducing power.

L'invention concerne des copolymères obtenus par copolymérisation radicalaire d'un composé poly(alkylène glycol) vinylique (A) avec un composé monomère éthyléniquement insaturé (B), ainsi que l'utilisation de ces copolymères comme agents de dispersion pour des suspensions aqueuses de substances solides, en particulier des liants hydrauliques à base de ciment, de chaux, de gypse et d'anhydrite. Les copolymères selon l'invention ralentissent à peine le durcissement du béton tout en présentant un excellent pouvoir réducteur d'eau et ils garantissent une longue possibilité de traitement du béton.

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