Controlled mini-emulsion free radical polymerization

Details Controlled mini-emulsion free radical polymerization Controlled mini-emulsion free radical polymerization

2008-01-08

2008-01-08

Yoon, Tae H (Department: 1714)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C523S201000, C526S222000

Reexamination Certificate

active

10482330

ABSTRACT:
The invention concerns a method for preparing polymers by free radical polymerisation comprising (i) preparing a mini-emulsion containing: at least an ethylenically unsaturated monomer, at least a control agent selected among xanthates, dithio-carbamates, thioether-thiones, the xanthates comprising phosphorus and optionally fluorine and dithiophosphoroesters, an aqueous solution, a surfactant, and a co-surfacant, and (ii) reacting said mini-emulsion, in the presence of a free radical source, at a sufficient temperature and/or for a sufficient time interval to form the polymers.

REFERENCES:
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patent: 6642318 (2003-11-01), Chiefari et al.
patent: 6777513 (2004-08-01), Destarac et al.
patent: 7012114 (2006-03-01), Bett et al.
patent: 19920353 (2000-11-01), None
patent: 2 794 463 (2000-12-01), None
patent: WO 98 01478 (1998-01-01), None

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