Aqueous emulsions of polyisocyanates and process for preparing them
CA 1338073 C · Owner: Lepori, Agostino · Inventors: Lepori, Agostino; Camaioni, Domenico
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to aqueous emulsions of polyisocyanates comprising at least one cellulose ether dissolved in water, and at least one organic polyisocyanate. The invention also relates to a process for preparing aqueous emulsions as defined hereinbefore comprising, dissolving the cellulose ether in water and then, adding the polyisocyanate at room temperature with a high, stirring speed, higher than 8,000 revolutions per minute and for short times, within the range of from 5 to 60 seconds.
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 February 20, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 20, 2013.
- 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.