Hydroxy functional copolymers, a process for the preparation and their use as binders or binder components
CA 2017808 C · Owner: Pedain, Josef · Inventors: Blum, Harald; Hohlein, Peter; Pedain, Josef
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 hydroxy functional polyacrylate copolymers having a molecular weight (M n) of about 2000 to 30,000 and containing, a) about 1 to 70% by weight of structural units corresponding to the formula, The present invention also relates to a process for the preparation of these hydroxy functional copolymers by reacting the corresponding anhydride functional copolymers with amino alcohols. Finally, the present invention also relates to the use of these hydroxy functional copolymers as binder components in combination with polyisocyanates for the production of polyurethane lacquers, coatings, sealants adhesives or, printing inks.
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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 May 30, 1990 and granted December 28, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 30, 2012.
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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.