Continuous miniemulsion polymerization process

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...

Reexamination Certificate

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C526S073000, C526S082000, C526S086000, C526S087000, C526S088000

Reexamination Certificate

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10600110

ABSTRACT:
A process including:heating to a first polymerization temperature a first mixture including a free radical polymerizable monomer, a free radical initiator, and a stable free radical compound to polymerize only a portion of the monomer, resulting in a prepolymer composition;shearing a second mixture including the prepolymer composition, a continuous phase liquid, and a stabilizing compound to create a miniemulsion; andflowing the miniemulsion within a polymerization reactor and heating the miniemulsion at a second polymerization temperature to form polymeric particles wherein the formation of the polymeric particles occurs while the miniemulsion flows within the reactor.

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Jose M. Asua, “Miniemulsion polymerization,”Progress in Polymer Science27 (2002), pp. 1283-1346.
Ignac Capek et al., “Radical Polymerization in Direct Mini-Emulsion Systems,”Advances in Polymer Science(2001), vol. 155, pp. 101-165.
Barkev Keoshkerian et al., “Process Forming Particles With Functional Groups,” U.S. Appl. No. 10/357,540, filed Feb. 3, 2003.

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