Aqueous polymer dispersions and a process for their production
CA 2028677 A1 · Owner: Kubitza, Werner · Inventors: Kubitza, Werner; Gruber, Hermann
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to an aqueous polymer dispersion containing at most 22% by weight of organic solvents and 30 to 60% by weight of dispersed polymers characterized in, that the dispersed polymers contain A) 20 to 80% by weight of chlorinated, natural or synthetic polymers having a chlorine content of 60 to 70% by weight and, B) 20 to 80% by weight of non-chlorinated polymers. The present invention also relates to a process for the production of an aqueous polymer dispersion characterized in that an at least 50% by weight solution in an inert solvent of a chlorinated, natural or synthetic polymer A) having a chlorine content of 60 to 70% by weight is mixed with water in 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
- Filed October 26, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 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
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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.