Emulsion polymerization processes and toners thereof

Details Emulsion polymerization processes and toners thereof Emulsion polymerization processes and toners thereof

1994-06-06

1995-10-03

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 80, 525309, 430109, 430137, 430904, C08F 222

Patent

active

054553156

ABSTRACT:
An in situ process for the preparation of resin particles comprising: preparing a seed particle latex by aqueous emulsion polymerization of a first mixture comprised of at least one monomer, an optional chain transfer agent, and a water soluble free radical initiator, wherein the reaction of the free radical initiator and monomer produces oligomeric radicals which provide in situ stabilization to the resulting first generation seed particles; optionally diluting the first seed particle latex with water; heating and starve feed adding to the first generation seed particles a second mixture comprised of at least one monomer, an organic soluble free radical initiator, an optional chain transfer agent, an optional water soluble free radical initiator, and an optional surfactant to form a third mixture comprised of second generation seed particles; heating and starve feed adding to the second generation seed particles additional said second mixture to form a fourth mixture comprised of third generation seed particles; heating and starve feed adding to the third generation seed particles additional said second mixture to form a fifth mixture comprised of fourth generation seed particles; and heating and starve feed adding to the fourth generation seed particles additional said second mixture to form a sixth mixture comprised of fifth generation seed particles.

REFERENCES:
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patent: 4935469 (1990-06-01), Akasaki et al.
patent: 5216065 (1993-06-01), Colyer et al.
patent: 5219943 (1993-06-01), Akasaki et al.
patent: 5273824 (1993-12-01), Hashino et al.
patent: 5286801 (1994-02-01), Besecke et al.

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