Aqueous dispersion of poly(acetal-polyether) and its use in protective coatings
CA 2589486 C · Owner: Salomons, Willimien G. · Inventors: Bakeev, Kirill N.; Nguyen, Tuyen T.; Salomons, Willimien G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aqueous dispersion includes an associative thickener based on a hydrophobically modified poly(acetal- or ketal-polyether) (HM-PAPE) and at least one viscosity reducing agent selected from ethoxylated alcohols ethoxylated acetyleneic diols, phosphate esters dialkyl sulfosuccinates, and , mixtures thereof. This aqueous dispersion improves the incorporation of the HM- PAPEs into aqueous based protective coatings. This dispersion also improves water-borne coating compositions that optionally contain latex.
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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 November 9, 2005 and granted January 29, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 9, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.