Process for preparing photosensitive polymer
CA 1046683 A · Owner: Mitsubishi Chemical Industries Ltd. · Inventors: Takahashi, Yoshihiro; Torige, Kazuo; Eguchi, Chihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a process for preparing a photosensitive polymer by reacting a polymer having an active halogen atom with an .alpha..beta.-unsturated carboxylic acid having the formula (I). Ar-(YC = CX)n - ? - OH (I) wherein X and Y reprerent hydrogen atom halogen atom, cyano, group or nitro group; Ar represents an aryl group which can be substituted with a nitro or cyano group and m is 1 or 2 in an aprotic, polar solvent, which is characterized in that the reaction is conducted in the presence of a bicyclic amidine having the formula (II), wherein R1 represents C1-11 alkylene group which can be substitutcd by a lower alkyl group and R2 represents propylene group which can be …
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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 January 16, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 16, 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.