Production of stable dispersions of polyureas and/or polyhydrazodicarbonamides in polyethers
CA 1068840 A · Owner: Bayer Aktiengesellschaft · Inventors: Dietrich, Manfred; Konig, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The instant invention is directed to stable dispersions and the process of their manufacture The stable dispersions of the instant invention comprise polyureas and/or polyhydrazo-dicarbonamides as the disperse phase in polyethers containing hydroxyl groups and are produced by reacting (1) organic polyisocyanates with (2) polyamines containing primary and/or secondary amino groups and/or hydrazines and/or hydrazides in (3) relatively high molecular weight polyethers containing at least one hydroxyl group. Components in such a quantity that the average residence time in the mixer is less than ten minutes. These dispersions may be used in the production of polyurethane foams, elastomers …
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 25, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 25, 1996.
- 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.