Multilayer recording element suitable for producing flexographic printing plates by digital information transfer
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United States of America Patent
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Jul 20, 1999
Grant Date -
N/A
app pub date -
Mar 18, 1997
filing date -
Mar 22, 1996
priority date (Note) -
Expired
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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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