Sizing agents for paper based on finely divided aqueous dispersions
CA 1303765 C · Owner: Degen, Hans-Juergen · Inventors: Riebeling, Ulrich; Degen, Hans-Juergen; Hoehr, Lothar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
O.Z. 0050/38946, Abstract of the Disclosure: Sizing agents for paper are based on finely divided aqueous dispersions of copolymers obtainable by copolymerizing from 40 to 140 parts by weight of a monomer mixture of, (a) from 20 to 65% by weight of (meth)acrylonitrile (b) from 35 to 80% by weight of one or more acrylates of monohydric saturated C3-C8-alcohols and (c) from 0 to 10% by weight of other ethylenically unsaturated copolymerizable monomers, the weight percentages (a) (b) and (c) always adding, up to 100, in the manner of an emulsion polymerization in 100 parts by weight of an aqueous solution containing in solution from 2.7 to 15% by weight of a degraded starch having a viscosity …
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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 June 16, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 16, 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.