Process for the production of copolymer powders
CA 1090950 A · Owner: Bayer Aktiengesellschaft · Inventors: Kolb, Gunter; Muller, Friedhelm; Sackmann, Gunter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved process for the production of powders of maleic acid anhydride/1-olefin copolymers by suspension polymerisation in the presence of special dispersion agents which are obtained by the reaction of a copolymer of maleic acid anhydride and a 1-olefin with an aliphatic monohydric alcohol or an aliphatic monoamine or a mixture thereof, at least 30 mol % of the anhydride groups being esterified to semi-esters or amidated to semi-amides. The copolymer powders obtained have a surprisingly narrow particle size distribution and can be used without grinding or sifting as reactive fillers for natural and synthetic rubbers. They also can be used for the production of paper coating agents as …
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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 2, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 2, 1997.
- 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.