Method for making an organo-soluble (meth)acrylic resin composition, and use of same as binding agent for antifouling marine paints
CA 2356759 A1 · Owner: Riondel, Alain · Inventors: Humbert, Marie; Vernet, Jean-Louis; Camail, Michel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method for making an organo-soluble (meth)acrylic resin composition which consists in: esterifying the COOH functions of a polymer comprising units derived from methacrylic acid in a solvent medium, with Ti(OR)4, R representing one among ethyl isopropyl, n-butyl, t-butyl, 2-ethylhexyl and t-amyl. The invention is characterised in that the esterification is carried out in the presence of at least a R'COOH monocarboxylic acid R' representing a linear, branched or cyclic C1-C18 alkyl radical; aryl; alkaryl; or aralkyl by stopping esterification before a gel is formed when theCOOH resin and R'COOH functions have been added with a molar ratio Ti(OR)4/-COOH functions of …
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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 21, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 21, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 2021.
- 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.