Method for the preparation of rigid reaction injection molded thermoset polyurethane modified polyisocyanurate compositions
CA 1282927 C · Owner: Younes, Usama E. · Inventors: Younes, Usama E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for the preparation of a molded reaction injection molded rigid polyurethane modified polyisocyanurate polymer composition by injecting at least two streams into the mold cavity of a RIM machine to react at temperatures of from about ambient to about 140°C a reaction mixture comprising at least one stream of an organic di- or polyisocyanate and a second stream of a cyclic alkylene carbonate a polyether, polyol and a soluble adduct of a tertiary amine and a cyclic alkylene carbonate as catalyst.
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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
- Granted April 16, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 16, 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
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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.