Flexible polyurethane foams which exhibit excellent flame resistance
CA 1286841 C · Owner: Burks, Stephen Ray · Inventors: Friedli, Hans Ruedi; Nichols, Jerram Bernett; Burks, Stephen Ray
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is an active hydrogen-containing composition suitable for the production of flexible polyurethane foam when reacted with a polyisocyanate said composition comprising, (a) a polyol having an average functionality of from 2.0 to 4.0, having at least 50% of its active hydroxyl groups in the form of primary hydroxyl groups and an equivalent weight of from 500 to 5000; (b) from 0.5 to 5 parts, per 100 parts by weight of component (a) of a crosslinker selected from the group consisting of monoethanolamine diethanolamine, triethanolamine, monoisopropanolamine diisopropanolamine, methylene bis(o-chloroaniline) and mixtures thereof; and, (c) at least 0.15 equivalent per equivalent of …
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
- Granted July 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 23, 2008.
- 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.