Copolymer dispersions using amphipathic stabilizers
CA 1060129 A · Owner: Imperial Chemical Industries Limited · Inventors: Bentley, John; 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 the production of a stable dispersion of a copolymer, in particular of a copolyester, copolyamide or copolyesteramide in a non-, solvent organic liquid. The process involves the steps of (1) dispersing two or more comonomers each of which is, capable of undergoing homopolymerisation and is solid at the copolymerisation temperature, in the liquid with the aid of a defined monomer-stabilising agent and so as to produce monomer particles no larger than 50µ and (2), heating the dispersion so obtained so as to bring about copolymerisation, in the presence of a defined polymerstabilising agent. The copolymers so produced are believed to be different in structure from …
Read the whole patent
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 August 7, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 7, 1996.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.