Dry photopolymer imaging process

Details Dry photopolymer imaging process Dry photopolymer imaging process

1976-05-26

1978-05-23

Hamrock, William F.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

96115R, 96115P, 20415918, 20415923, 526 27, 526 30, 526 46, 526 481, 526 51, C08F 818, C08F 830, C08F 840, C08F 842

Patent

active

040911942

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: 3074809 (1963-01-01), Workman
patent: 3205157 (1965-09-01), Licasi et al.
patent: 3708296 (1973-01-01), Schlesinger
patent: 3890149 (1975-06-01), Schlesinger et al.
patent: 4000115 (1976-12-01), Jacobs

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