Copolymers of unsaturated carboxylic acids and use thereof
CA 1323627 C · Owner: Grillo-Werke Ag · Inventors: Nies, Helmut; Rohe, Dieter; Driemel, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to copolymers based on unsaturated carboxylic acids and sugars capable of forming enolates, obtainable by copolymerizing the unsaturated carboxylic acids in an amount of from 35 to 80%, based on the total monomers, with an alkaline solution of at least one of palatinose and leucrose in the presence of free radical initiators at temperatures of between 60°C and 110°C, while at least one of the two monomers is continuously supplied, then cooled and precipitated by acidification. The copolymers of the present invention are excellently suitable as sequestrants complexants and co-builders in washing and cleaning agents.
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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 October 26, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 26, 2010.
- 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.