Process for the production of optionally cellular moldings
CA 1238450 A · Owner: Bayer Aktiengesellschaft · Inventors: Balle, Gerhard; Paul, Reiner; Rasshofer, Werner
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 process for the production of optionally cellular polyurethane, and/or polyurethane-urea moldings having an impervious skin by reacting in a closed mold a reaction mixture containing, a) at least one organic polyisocyanate b) at least one compound which has a molecular weight of about 400 to 12,000 and at least two isocyanate-reactive groups, and, c) optionally at least one compound which has a molecular weight of from 32 to 399 and at least two isocyanate-reactive groups, wherein before the reaction takes place a surfaceimproving additive (e) is added containing el) a liquid and sedimentation-stable polymer dispersion which is produced by the free …
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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 June 21, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 21, 2005.
- 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.