Process for the production of autocrosslinkable polymers
CA 1052937 A · Owner: Bayer Aktiengesellschaft · Inventors: Arlt, Dieter; Bremen, Josef
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Storable, autocrosslinkable polymers containing N-alkoxymethyl groups are obtained by reacting 5-alkoxymethyl-1,3,4dioxazol-2-ones with a polymer having an average molecular weight above 600 and an average of more than one Zerewitinoffactive hydrogen atom in the molecule in the presence of a catalytic quantity of at least an alkali metal salt. The new catalysts allow to carry out the reaction at a temperature in the range from 50° to 110°C and guarantee a complete reaction of the reactants into uncrosslinked but autocrosslinkable light-stable end products.
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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 April 17, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 17, 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.