Prevention of unwanted cure catalysis in isocyanate cured binders
CA 1237896 A · Owner: The Government Of The United States As Represented By The Secretary Of T He Army · Inventors: Ducote, Marjorie E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract From the Canadian patent
This disclosure identifies certain dicarboxylic acids (e.g. maleic and oxalic) and methods of use to obtain extended pot life in diisocyanate cured polymer systems such as hydroxy terminated polybutadienes, polyesters etc. These compounds also prevent catalysis of the urethane reaction by cure inducing materials such as catocene iron oxide, ferric, floride, etc. without interfering with the function of the cure catalyst triphenylbismuthine.
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.
Why it's free to use
- Granted June 14, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 14, 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.