Dry positive photopolymer imaging process involving heating and

Details Dry positive photopolymer imaging process involving heating and Dry positive photopolymer imaging process involving heating and

1974-07-05

1976-12-14

Bowers, Jr., Charles L.

Gas separation: apparatus

Electric field separation apparatus

Electrode cleaner, apparatus part flusher, discharger, or...

96 27R, 96 351, 96 49, 96 75, 96 91R, 96115P, 96115R, 96 86P, 20415918, 20415922, 20415923, G03F 708, G03C 500, G03C 546

Patent

active

039973441

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, non-exposed area of the coating, resulting in a pigmented image.

REFERENCES:
patent: 3418295 (1968-12-01), Schoenthaler
patent: 3526504 (1970-09-01), Celeste
patent: 3649268 (1972-03-01), Chu et al.
patent: 3708296 (1973-01-01), Schlesinger
patent: 3721617 (1973-03-01), Watts
patent: 3909282 (1975-09-01), Gray

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