Method of producing polymer particles having narrow particle siz

Details Method of producing polymer particles having narrow particle siz Method of producing polymer particles having narrow particle siz

1989-09-18

1991-10-29

Henderson, Christopher

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

524543, 526194, 526201, 526203, 526204, 526209, 526212, C08F 206, C08F 208

Patent

active

050617664

ABSTRACT:
A method of producing polymer particles having a particle size distribution of .+-.25% with respect to each average particle size in an amount of 95 wt. % or more, within the average particle sizes ranging from 1 .mu.m to 100 .mu.m, is disclosed, which comprises the steps of: (1) adding a polymer dispersion stabilizer in an amount of 0.1 to 10 wt. % to a hydrophilic organic liquid in which the polymer dispersion stabilizer is soluble; (2) adding thereto at least one vinyl monomer in an amount of not more than 50 times by weight the amount of the polymeric dispersion stabilizer, which monomer is soluble in the hydrophilic organic liquid, but a polymer synthesized from the monomer being swelled or substantially insoluble in the hydrophilic organic liquid; and (3) polymerizing the monomer under the condition that the amount of the vinyl monomer is 200 wt. % or less of the hydrophilic organic liquid.

REFERENCES:
patent: 3232912 (1966-02-01), Munday
patent: 4027082 (1977-05-01), Gaurilova
patent: 4029616 (1977-06-01), Nakashio
patent: 4334049 (1982-06-01), Ramlow

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