Finely divided vinyl chloride-ethylene copolymers stabilized by protective colloids
CA 1308512 C · Owner: Wacker-Chemie G.M.B.H. · Inventors: Selig, Manfred; Ball, Peter; Hannebaum, Manfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A finely-divided monomodal protective-colloid stabilized aqueous dispersion of a copolymer of at least 75% by weight of units of vinyl chloride and ethylene and optionally copolymerized with up to 25% by weight of units of additional monomers unsaturated at the ethylene bond and having a solids content of 45 to 70% by weight, characterized in that the dispersions are not partially flocculated, the polymer has a mean particle size of 150 to 500 nm measured as mean weight in a disc centrifuge and a polydispersion index of not more than 1.8 and less than 50% of the polymer particles are larger than 1,000 nm and a process for the preparation thereof using a single step radical polymerization of …
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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 6, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 6, 2009.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.