C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/42, 400/7328
C08G 14/06 (2006.01) C04B 24/22 (2006.01)
Patent
CA 1293087
ABSTRACT Aminoarylsulfonic acid-phenol-formaldehyde condensate prepared by polymerizing 20 to 70 parts by weight of a compound of the general formula: R1SO3H (I) Image wherein R1 is (wherein R? is hydrogen or lower alkyl) or Image , or its salt, 10 to 50 parts by weight of a compound of the general formula: Image , (II) wherein R2 is hydrogen, lower alkyl, lower alkoxy, hydroxy or carboxy, or its salt, and 10 to 40 parts by weight of formaldehyde. This condensate is useful for incorporating in fresh cementing composition. A method of preparing the cementing composition including the above con- densate is also described. A concrete admixture in- cluding the above condensate has improved consistency and is restrained in so far as change of fluidity such as slump loss with the passage of time.
578272
Adachi Toshikazu
Furuhashi Takahiro
Kawada Kazushige
Tahara Susumu
Takahashi Yuji
Fujisawa Pharmaceutical Co. Ltd.
Swabey Ogilvy Renault
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