Acidic reducer for providing increased adhesion of a two component polyurethane primer to substrates
CA 2496679 A1 · Owner: Basf Corporation · Inventors: Salter, Keith; Newton, David; Morrison, Charleen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition comprising a two component polyurethane composition comprising a first component comprising a polyisocyanate and a second component comprising a polyol, wherein at least one of the first component and the second component further comprise a solvent; a phosphoric acid; and a phosphate ester of the formula (OM)3-n-P(O)-(OR)n, wherein n is 1 or 2 R is an organofunctional , group, and M is hydrogen metal, or ammonium. Also, a composition comprising a two component polyurethane composition comprising a first component comprising a polyisocyanate and a second component comprising a polyol wherein at least , one of the first component and the second component further comprise a …
Read the whole patent
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 June 6, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 6, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 6, 2025.
- 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.