Process for the production of cold-setting flexible polyurethane foams with excellent damping properties
CA 1319786 C · Owner: Bayer Aktiengesellschaft · Inventors: Wolf, Klaus-Dieter; Wolfgramm, Rudi; Gansen, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Mo3133, LeA 25,859, PROCESS FOR THE PRODUCTION OF COLD-SETTING FLEXIBLE POLYURETHANE, FOAMS WITH EXCELLENT DAMPING PROPERTIES ABSTRACT OF THE DISCLOSURE, This invention relates to a process for the production of cold-setting flexible polyurethane foam useful for damping sound comprising reacting a polyisocyanate in the presence of water with (a) at least one polyether having an OH number of from 20 to 60 and containing at least two OH groups, wherein said polyether is based on 75 to 95% by weight propylene oxide and 5 to 25% by weight ethylene oxide; (b) a polyether or polyester having an OH number of from 150 to 400 and containing at least two OH groups; and (c) a polyether different from …
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 June 29, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 29, 2010.
- 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.