The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 27, 1976
Filed:
Apr. 05, 1973
Desmond Wilfrid Osmond, Windsor, EN;
Morice William Thompson, Maidenhead, EN;
Imperial Chemical Industries Limited, London, EN;
Abstract
A stable dispersion of polymer in a non-solvent organic liquid is made from a monomer which is both solid and not completely soluble in the organic liquid at the polymerisation temperature, optionally in conjunction with other monomers which are appreciably soluble in the liquid medium at that temperature. The process comprises dispersing the solid monomer in the organic liquid in the presence of a specified monomer-stabilising agent so as to produce a stable dispersion of particles of mean diameter not greater than 50.mu., and then heating the dispersion of solid monomer together with the other monomers, if any, at the polymerisation temperature in the presence of a specified polymer-stabilising agent. A single stabilising agent combining the functions of monomer-stabiliser and polymer-stabiliser may be employed. The process is applicable to the production of both addition polymers and condensation polymers.