Process for the production of sterically stabilised non-aqueous dispersions of composite polymer microparticles from ethylenically unsaturated monomers
CA 1164130 A · Owner: Imperial Chemical Industries Limited · Inventors: Backhouse, Alan; Bromley, Charles; Thompson, Morice W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is described for making sterically stabilised non-aqueous dispersions of composite polymer microparticles in, which (1) monomers including at least one crosslinking monomer are polymerised in an aqueous medium at a temperature at least 10° higher than the glass transition temperature of the polymer to be formed, in the presence of a block or graft copolymer stabilising agent, under conditions such that there is at no time present a separate monomer phase, (2) further monomers not, including any crosslinking monomer are polymerised in the dis-, persion thus obtained the presence of a separate monomer phase again being avoided, and (3) the microparticles are transferred from 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 March 20, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 20, 2001.
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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.