Robust polycarboxylate containing ether linkages for milling...

C - Chemistry – Metallurgy – 04 – B

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C04B 24/24 (2006.01) B02C 23/06 (2006.01) C08G 81/02 (2006.01)

Patent

CA 2750237

The present invention discloses compositions and methods wherein polycarboxylate comb polymers are used as grinding additives The comb polymers contain a carbon-containing backbone and pendant groups wherein oxyalkylene pendant groups contain one or more ether linkage groups for providing robustness to the polymer for resisting degradation during grinding and hence sustaining workability and strength of hydratable cementitious materials, such as cements, pozzolans, limestone, and other cementitious materials

La présente invention porte sur des compositions et des procédés. Selon l'invention, des polymères en peigne de polycarboxylate sont utilisés en tant qu'additifs de broyage. Les polymères en peigne contiennent un squelette contenant du carbone et des groupes pendants, les groupes pendants oxyalkylène contenant un ou plusieurs groupes de liaison éther pour conférer au polymère la robustesse nécessaire pour résister à une dégradation pendant le broyage, et de ce fait maintenir l'aptitude à la mise en uvre et la résistance de matières hydratables à base de ciment, telles que les ciments, les pouzzolanes, la chaux et autres matières à base de ciment.

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