Stabilization of precipitated dispersions of hydrophobic coupler

Details Stabilization of precipitated dispersions of hydrophobic coupler Stabilization of precipitated dispersions of hydrophobic coupler

1990-06-27

1992-02-11

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified radiation sensitive composition with color...

430543, 430627, 430630, 430631, 430636, 430642, 430449, 430541, 430565, G03C 925, G03C 732

Patent

active

050875540

ABSTRACT:
The invention provides stable dispersions of couplers and methods of their formation. The stable dispersions are formed by the use of a nonionic water soluble polymer in combination with an anionic surfactant having a sulfate or sulfonate head group and a hydrophobic group of 8 to 20 carbons. The preferred nonionic water soluble polymers are polyethyleneoxide and polyvinylpyrrolidene. It is preferred that the dispersions have a pH of between about 5 and 5.5.

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