Process for preparation of antistatic agent and methacrylic resin composition
CA 1333642 C · Owner: Mitsubishi Rayon Company Ltd. · Inventors: Tone, Seiji; Sugimori, Masahiro; Takeda, Haruko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An antistatic agent capable of imparting a permanent antistatic property to a methacrylic resin is prepared as follows. First, an alkyl methacrylate is subjected to living polymerization in an atmosphere substantially free of water in the presence of at least one compound acting as a source for supplying an anion selected from HF2-, (CH3)3SiF2- and F- by using as an initiator a compound represented by the formula (I) or (II):, (I), or, (II), wherein R is H or CH3 and R1 is H or alkyl; second, a methacrylic acid ester comprising at least 80 mole% of a methacrylic acid ester represented by the formula (III):, (III) wherein R2 is alkyl and m is from 1 to 6 is, subjected to living …
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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 December 20, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 20, 2011.
- 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.