Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1986-06-30
1987-07-21
Welsh, J. David
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
G03G 912
Patent
active
046818316
ABSTRACT:
A liquid electrostatic developer containing negatively chargeable resin particles with improved charging characteristics, said developer consisting essentially of
(A) nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount,
(B) nonpolar liquid soluble ionic or zwitterionic charge director compound, and
(C) resin particles of a polymer containing at least one acidic constituent having a pKa less than 4.5, preferably 3.0, at 25.degree. C. in water and an acid number due to said acidic constituent of at least one. The average resin particle size by area is less than 10 .mu.m. Optionally a colorant and other additives or adjuvants are present. The liquid electrostatic developer is useful in copying making proofs including digital color proofs, lithographic printing plates, and resists.
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Larson James R.
Trout Torence J.
E. I. Du Pont de Nemours and Company
Welsh J. David
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