Blocked polyisocyanate crosslinkers for providing improved flow properties to coating compositions
CA 2195162 A1 · Owner: Bayer Corporation · Inventors: Yeske, Philip E.; Squiller, Edward P.; Yonek, Kenneth P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to a powder coating composition containing as binder, A) a polyisocyanate component which contains blocked isocyanate groups, is present in powder form, is solid below 40°C and liquid above 150°C, and contains one or more polyisocyanates i) having a blocked NCO content (calculated as NCO MW 42), of 5 to 25% by weight and, ii) containing fluorine (calculated as F AW 19) in an amount of, 0.01 to 20% by weight wherein the preceding percentages are based on the solids content of the polyisocyanate mixture and B) a polyhydroxyl component containing one or more high molecular weight polyols.
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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 January 15, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 15, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 15, 2019.
- 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.