Polymer compositions, aqueous dispersions and aqueous paint compositions by use thereof as emulsifiers
CA 2048653 A1 · Owner: Kuwajima, Teruaki · Inventors: Konishi, Sakuichi; Ninomiya, Yusuke; Kuwajima, Teruaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, The present invention provides a polymer composite dispersed in water containing primary and/or secondary polyamines, wherein the oligomer is synthesized by allowing to react (a) a diol compound with molecular weight of 100 to 5000 and having terminal hydroxyl groups, (b) a diisocyanate compound, (c) a compound having at least one active hydrogen and zwitterionic groups in the molecule and (d) an ethylenically unsaturated monomer with active hydrogens in the molecule with each other under the reaction conditions enriched in isocyanates; an aqueous dispersion which can be obtained by polymerizing monomers by use thereof as an emulsifying agent; and an aqueous …
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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
- Filed December 28, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 28, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 28, 2012.
- 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.