Aqueous polymer dispersions having a long shelf life
CA 1300292 C · Owner: Wistuba, Eckehardt · Inventors: Schwerzel, Thomas; Neubert, Gerhard; Blum, Rainer
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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14 - O.Z. 0050/39267, Abstract of the Disclosure: Aqueous polymer dispersions which have a long shelf life are obtainable by dispersing a mixture of, 15-50% by weight of a copolymer (A) of (I) 1.5-15% by weight of copolymerizable compounds of 3 to 10 carbon atoms which contain a carboxyl or carboxylic anhydride group, (II) 30-98.5% by weight of C1-C20-alkyl acrylates or methacrylates, (III) 0-60% by weight of vinylaromatics (IV) 0-20% by weight of copolymerizable carbonyl compounds and, (V) 0-20% by weight of further copolymerizable organic compounds not stated under (I) to (IV) and 50-85% by weight of a copolymer (B) of 40-100% by weight of the monomers (II) and 0-60% by weight of the …
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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 May 5, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 5, 2009.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.