Method for the preparation of stable aqueous dispersions of polymer beads and the use of these dispersions in photographic elements
CA 1206657 A · Owner: Agfa-Gevaert Naamloze Vennootschap · Inventors: Timmerman, Daniel M.; Priem, Jan J.; Janssens, Wilhelmus
Overview
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Method for the preparation of stable aqueous dispersions of polymer beads and the use of these dispersions in photographic elements. Method for the preparation of stable aqueous dispersions of finely divided solid spherical polymer beads having an average particle size between about 0.5 and about 5 µm and having a glass transition temperature of at least 40°C by dissolving in an aqueous solvent mixture at least one .alpha..beta.-ethylenically unsaturated monomer capable of forming a polymer that is soluble in the monomer(s) present in said aqueous solvent mixture but which is insoluble in said aqueous solvent mixture, a free radical-forming polymerization initiator, and a …
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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 24, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 24, 2003.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.