Aminoarylsulfonic acid-phenol-formaldehyde condensate and concrete admixture comprising the same
CA 1293087 C · Owner: Furuhashi, Takahiro · Inventors: Kawada, Kazushige; Tahara, Susumu; Adachi, Toshikazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Aminoarylsulfonic acid-phenol-formaldehyde condensate prepared by polymerizing 20 to 70 parts by weight of a compound of the general formula:, R1SO3H, (I), wherein R1 is, (wherein R? is hydrogen or lower alkyl) or , or its salt, 10 to 50 parts by weight of a compound of the general formula:, , (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 condensate is also described. A concrete admixture including the above condensate has improved consistency and is restrained …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted December 10, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 10, 2008.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.