Stabilization of precipitated dispersions of hydrophobic coupler

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

1991-09-09

1993-10-26

Wright, Lee C.

Radiation imagery chemistry: process, composition, or product th

Nonradiation sensitive image processing compositions or...

430493, 430543, 430546, 430553, 430558, 430627, 430630, 430631, 430636, G03C 7388

Patent

active

052565270

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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