Multilayer recording element suitable for producing flexographic

Details Multilayer recording element suitable for producing flexographic Multilayer recording element suitable for producing flexographic

1997-03-18

1999-07-20

Codd, Bernard

Radiation imagery chemistry: process, composition, or product th

Diazo reproduction, process, composition, or product

Composition or product which contains radiation sensitive...

4302731, 430306, G03C 152, G03F 7095

Patent

active

059254904

ABSTRACT:
In a multilayer recording element which is suitable for producing flexographic printing plates by digital information transfer and has, arranged one on top of the other on a dimensionally stable substrate, a layer (A) which is crosslinkable by actinic radiation, a layer (B) sensitive to actinic radiation and, if required, a peelable cover sheet, the layer (A) crosslinkable by actinic radiation is crosslinked by imagewise exposure to actinic radiation of from 0.5 to 5 J/cm.sup.2 and can then be washed out by a developer and essentially comprises a mixture of at least one elastomeric binder, ethylenically unsaturated copolymerizable organic compounds, photoinitiator, and, if required, further assistants, and the layer (B) sensitive to actinic radiation is a layer which is soluble or dispersible in developers and has an optical density of >2.5 in the actinic range, undergoes a change the optical density by >1 as a result of one or more laser pulses in the wavelength range from 254 to 532 nm with an energy of from >5 to 50 J/cm.sup.2 and essentially comprises arylazophosphonate-containing compounds.

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Zavalishina et al., Zhurnal Obshchei Khimii, vol. 38, No. 10, pp. 2271-2276, Oct. 1968 (translation thereof).
Penczek et al., Macromolecules, vol. 26, pp. 2228-2233, 1993.
Pretula et al., Makromol. Chem., vol. 191, pp. 671-680, 1990.
Patent Abstracts of Japan, vol. 7, No. 138 (P-204), Jun. 10, 1983 (English abstract of JP 58 052646, Mar. 28, 1983).

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