Use of monohydric alcohols in molded polyurethane resins
CA 1333437 C · Owner: The Dow Chemical Company · Inventors: Nelson, Donald L.; Waszeciak, Douglas P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are novel active hydrogen compositions comprising: (1) a polymeric polyol; (2) a low equivalent weight cross-linking polyol; (3) optionally a second polyol having an equivalent weight up to 500; and (4) a sufficient amount of a monohydric alcohol of equivalent weight up to 1,500 to provide a monophase low viscosity blend. Also disclosed are the molded polyurethanes produced from the above compositions, and particularly, high strength mat molded reaction injection molded parts, and the process of preparing such molded polyurethanes and parts.
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 December 6, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 6, 2011.
- 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.