Developer mixture for developing exposed light-sensistive copyin

Details Developer mixture for developing exposed light-sensistive copyin Developer mixture for developing exposed light-sensistive copyin

1980-10-14

1982-07-13

Bowers, Charles L.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Finishing or perfecting composition or product

430302, 430309, 430493, 430634, 430638, G03C 524, G03C 702

Patent

active

043395309

ABSTRACT:
This invention relates to a developer mixture for washing out light-sensitive copying layers previously exposed in imagewise manner and containing a polymer of an N-vinyl amine, of vinyl alcohol or of a vinyl alcohol derivative, an alcohol being water-soluble in an amount less than 10% by weight, and water as the main constituent, the mixture containing as said polymer a copolymer which is water-soluble or which can be dispersed in water to form a stable dispersion, composed of (a) hydrophilic units of the formula I: ##STR1## wherein A is O-R or ##STR2## R is a hydrogen atom or a methyl group; R.sub.1 is a hydrogen atom, an alkyl group or an alkoxy alkyl group having 1 to 10 carbon atoms each or an aryl group with 6 to 10 carbon atoms; R.sub.2 is an alkyl group or an acyl group having 1 to 5 carbon atoms each, and wherein a homopolymer of the hydrophilic units is water-soluble and of (b) hydrophobic units of vinyl monomers whose homopolymer is water-insoluble and which have an aromatic or a long-chain aliphatic group as the substituent, the proportion of the hydrophobic units being sufficient to ensure that an 0.1% aqueous solution of said copolymer has a surface tension of not more than 50 mN/m and that the quantity of said copolymer is at least sufficient to emulsify any quantity of alcohol exceeding the solubility limit. The invention also relates to a process for developing exposed light-sensitive copying layers using said developer mixture.

REFERENCES:
patent: 3284429 (1966-11-01), Fuchs et al.
patent: 4186006 (1980-01-01), Kobayashi et al.

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