Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Radiation-sensitive composition or product
Patent
1990-10-26
1992-09-08
McCamish, Marion E.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Radiation-sensitive composition or product
430 76, 430 96, 430 56, 430343, 430 49, G03F 506
Patent
active
051457601
ABSTRACT:
High resolution, photosensitive electrostatic master which is positive-working with a single imagewise exposure comprising a conductive support bearing a layer of a photosensitive composition consisting essentially of (a) at least two polymeric binders, at least one binder having a Tg greater than 80.degree. C. and at least one binder having a Tg of 70.degree. C. or less such that the shift in transit time (a.sub.T) of the photosensitive layer in the range of 30%.ltoreq.relative humidity.ltoreq.60% and 65.degree. F. (18.3.degree. C.).ltoreq.temperature .ltoreq.80.degree. F. (26.7.degree. C.) is 10 or less, (b) a hexaarylbiimidazole photooxidant, (c) leuco dye, preferably stabilized, oxidized by (b), (d) a nonionic halogenated compound, preferably a hydrocarbon, and (e) at least one compatible plasticizer. A process of making positive images by a single imagewise exposure is described. The master is useful in making proofs that duplicate the image achieved by printing, and manufacture of printed circuit boards, etc.
REFERENCES:
patent: 3445234 (1969-05-01), Cescon et al.
patent: 3537848 (1970-11-01), Lane
patent: 3925074 (1975-12-01), Wyhof
patent: 4495020 (1990-07-01), Kempf et al.
patent: 5043237 (1991-08-01), Blachat-Fincher et al.
Blanchet-Fincher Graciela B.
Chang Catherine T.
Kempf Richard J.
E. I. Du Pont de Nemours and Company
McCamish Marion E.
RoDee C D.
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