Alkaline curing emulsions for use in cement admixtures
CA 1297219 C · Owner: Shitaoka, Shizuo · Inventors: Gold, Samuel; Tokumoto, Minoru; Takagi, Motoyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cement admixture which results in a cement mortar with excellent adhesion to various adherents and with excellent flexibility over a wide range of temperatures, including very low temperatures contains cement, optionally but preferably sand and an effective amount of an aqueous, emulsion of a cationic acrylate polymer having a Tg between below 10°C and -40°C. The polymer comprises (a) about 25 to 85% of an acrylate monomer (e.g. butyl acrylate, methylmethacrylate or 2-ethylhexyl acrylate but, not methyl or ethyl acrylate) (b) about 0.5-15% of the total polymer weight of an alkaline-curable cationic quaternary ammonium salt monomer and optional, monomer(s) other than (a) or (b). The …
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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 March 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 10, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.