Process for preparing uniformly sized, fine particles of polymer

Details Process for preparing uniformly sized, fine particles of polymer Process for preparing uniformly sized, fine particles of polymer

1992-08-10

1996-03-05

Bleutge, John C.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525257, C08F 400

Patent

active

054968976

ABSTRACT:
Uniformly sized, fine particles of a polymer are produced by:
(1) mixing (B) a nonionic-organic compound being liquid at room temperature, having a solubility in water at 25.degree. C. of 0.01 wt. % or larger and being compatible with (A) an oil-soluble, ethylenically unsaturated monomer, with the monomer (A) in an amount of 0.5 to 300 wt. % based on the monomer (A),
(2) then adding the mixture of (A) and (B) to an aqueous dispersion of (C) particles of a seed polymer so as to make the mixture of (A) and (B) absorb onto the paricles (C) and
(3) polymerizing the mixture of (A), (B) and (C) in the presence of an oil-soluble initiator for the polymerization to obtain said uniformly sized, fine particles.

REFERENCES:
patent: 4085169 (1978-04-01), Saito et al.
patent: 4245070 (1981-01-01), Kemp
patent: 4333969 (1982-06-01), Wright et al.
patent: 4459378 (1984-07-01), Ugelstad
patent: 4530956 (1985-07-01), Ugelstad et al.
patent: 4536545 (1985-08-01), Olener et al.
patent: 4624992 (1986-11-01), Milani et al.
patent: 4626554 (1986-12-01), DiGiulio
European Search Report.

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