Planographic printing plate method using light sensitive materia

Details Planographic printing plate method using light sensitive materia Planographic printing plate method using light sensitive materia

1986-03-21

1988-03-22

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making printing plates

430309, 430326, 430330, 430175, 430192, 430197, 430270, 430281, 430286, 430287, 430905, G03F 708

Patent

active

047328401

ABSTRACT:
A light-sensitive composition comprising a phenolic resol wherein the ratio of the number of dibenzylic ether linkages to the total number of dibenzylic ether, methylene and methylol linkages linked to phenolic nucleus is 15 mol. % or more and which is obtained by a reaction between a phenol of the formula (I): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 may be the same or different and represent hydrogen, halogen, hydroxyl, nitro, alkyl, alkoxy, phenyl, or substituted phenyl, and an aldehyde or ketone.
A light-sensitive composition comprising a condensate of the phenolic resol and an o-quinone diazido sulfonylhalide.
A light-sensitive material comprising the above-mentioned composition.
A method for making a planographic printing plate from the light-sensitive material, characterized in that burning-in process is carried out at a lower temperature or a shortened time.

REFERENCES:
patent: 3485797 (1969-12-01), Robins
patent: 3635709 (1972-01-01), Kobayashi
patent: 3666473 (1972-05-01), Colom et al.
patent: 3676392 (1972-07-01), Robins
patent: 4079031 (1978-03-01), Sardessai et al.
patent: 4536464 (1985-08-01), Nagashima et al.
patent: 4612254 (1986-09-01), Ginter et al.

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