Dry photopolymer imaging article having a diazonium salt and epo

Details Dry photopolymer imaging article having a diazonium salt and epo Dry photopolymer imaging article having a diazonium salt and epo

1976-05-26

1978-02-28

Bowers, Jr., Charles L.

Gas separation: apparatus

Electric field separation apparatus

Plural diverse electric fields

96 33, 96 36, 96 362, 96 86P, 96115R, G03C 154, G03C 170, G03C 194

Patent

active

040765369

ABSTRACT:
Copolymers of glycidyl acrylate and allyl glycidyl ether and terpolymers derived from addition of glycidyl methacrylate to the polymerizable mixture, having an inherent viscosity within the range of about 0.09 to 0.28 and an epoxy equivalent of at least about 0.64 per 100 g. of polymer are provided which upon admixture with a catalyst which is a radiation-sensitive aryldiazonium salt of a complex halogenide, provides compositions suitable for use in a dry photopolymer positive imaging process. In the process, the polymer which is non-tacky at room temperature, together with the catalyst is applied to a substrate and exposed to an energy source for example, electromagnetic radiation through a transparency or mask. Following exposure, the coating is heated to the softening point of the unexposed portion of the coating and a powder or toner is applied thereto, the toner being adhered to only the tacky, nonexposed area of the coating, resulting in a pigmented image.

REFERENCES:
patent: 3074869 (1963-01-01), Workman
patent: 3205157 (1965-09-01), Licari
patent: 3396019 (1968-08-01), Uhlig
patent: 3708296 (1973-01-01), Schlesinger
patent: 3752669 (1973-08-01), Abolafic
patent: 3790385 (1974-02-01), Steppan

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