C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
261/56.4
C04B 24/26 (2006.01) C04B 24/32 (2006.01) C04B 28/06 (2006.01) C04B 40/00 (2006.01)
Patent
CA 2318090
A process for producing a dispersant for use in powdery hydraulic compositions, which comprises adding a reducing agent to a liquid consisting mainly of a polycarboxylic acid polymer having a polyalkylene glycol chain and subsequently drying and powdering the mixture; a powdery hydraulic composition obtained by the process; and a hydraulic composition obtained therefrom. The dispersant is satisfactory in flowability and dispersing ability and can be added beforehand to a cement, etc.
L'invention porte sur un procédé de production d'un dispersant pour composition hydraulique en poudre consistant à ajouter un agent réducteur à un liquide comprenant principalement un polymère d'acide carboxylique à chaîne polyalkylène glycol, puis à dessécher puis pulvériser le mélange. L'invention porte en outre sur la composition hydraulique en poudre ainsi obtenue, et sur la composition hydraulique en étant tirée. Le dispersant satisfaisant du point de vue de la fluidité et de la capacité de dispersion peut s'ajouter préalablement à du ciment, etc.
Hayashi Hiroshi
Isomura Hirotaka
Makino Kenjiro
Soeda Koichi
Takimoto Masaki
Gowling Lafleur Henderson Llp
Taiheiyo Cement Corporation
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