Kao Corporation

Toshiharu Kojima

Koji Koyanagi

Hotaka Yamamuro

Fujio Yamato

Fuzio Yamato

Tatsuya Mizunuma

Masanori Iizuka

Akitoshi Tuji

The present invention provides a cement slurry composition, containing a hydraulic cement material, (A) a first water-soluble low molecular weight compound and (B) a second water-soluble low molecular weight compound differing from the compound (A), wherein a combination of the compounds (A) and (B) is (I) the compound (A) selected from cationic surfactants and the compound (B) selected from anionic aromatic compounds; or (II) the compound (A) selected from cationic surfactants and the compound (B) selected from brominated compounds, and in the compound (A), a ratio of compounds having a hydrocarbon group of 18 or more carbon atoms is not less than 45% by weight.

Cement slurry composition

The present invention provides a liquid rheology modifier containing compounds (A) and (B) selected from combination (1) of compound (A) selected from cationic surfactants and compound (B) selected from anionic aromatic compounds and combination (2) of compound (A) from cationic surfactants and compound (B) selected from brominated compounds; and dicarboxylic acid (C).

Liquid rheology modifier

Disclosed is a powdery rheology modifier containing an anionic aromatic compound, a cationic surfactant, and an inorganic powder having a specific surface area of 5000 cm/g or more.

Rheology modifier

An additive to cement comprises a granular zinc salt of a copolymer of an olefin having 2 to 8 carbon atoms and an ethylenically unsaturated dicarboxylic anhydride, prepared by reacting the powder of the copolymer with powder of zinc oxide or zinc hydroxide in the presence of water.

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Wakayama, Japan

Toshiharu Kojima