Process for the production of particular polymers

Details Process for the production of particular polymers Process for the production of particular polymers

2005-04-05

2005-04-05

Egwim, Kelechi C. (Department: 1713)

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C523S202000, C523S205000, C523S207000, C524S458000, C526S201000

Reexamination Certificate

active

06875799

ABSTRACT:
The invention describes a process for the preparation of a particulate polymer, said process comprising: i) forming an aqueous dispersion comprising a particulate polymer seed material and a first organic compound; ii) allowing said first organic compound to diffuse into said seed material to produce a pre-swollen seed material; iii) contacting said pre-swollen seed material in aqueous dispersion with said first organic compound and a second organic compound, preferably one which is soluble in said first organic compound; iv) allowing or causing said first and second organic compounds to pass into said pre-swollen seed material to produce an activated seed material; v) contacting said activated seed material with a monomer and effecting suspension polymerization thereof.

REFERENCES:
patent: 4336173 (1982-06-01), Ugelstad
patent: 4714682 (1987-12-01), Schwartz
patent: 5972363 (1999-10-01), Clikeman et al.
patent: 61215605 (1986-09-01), None
patent: 8301453 (1983-04-01), None

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