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US 5,705,309 AGranted
Photosensitive composition and element containing polyazide and an infrared absorber in a photocrosslinkable binder
AssigneeEastman Kodak Company
InventorsPaul Richard West, Jeffery Allen Gurney
Life of this patent
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Abstract
An infrared imaging composition comprises three essential components: a photocrosslinkable polymeric binder having pendant photopolymerizable olefinic double bonds, a polyazide photoinitiator and an infrared absorbing compound. These compositions are useful in photosensitive elements such as lithographic printing plates that can be used to provide images using lasers, followed by development.
Claims21
A photosensitive composition comprising:
- a) a photocrosslinkable polymeric binder having pendant photopolymerizable olefinic double bonds,
- b) a polyazide photoinitiator that is present in an amount of from 5 to 40 percent (based on dry composition weight), and
- c) an infrared absorbing compound that has a maximum absorption wavelength in the region of at least 750 nm, and is present in an amount of from 1 to 25 percent (based on dry composition weight).
A photosensitive element comprising a support and having thereon a photosensitive composition comprising:
- a) a photocrosslinkable polymeric binder having pendant photopolymerizable olefinic double bonds,
- b) a polyazide photoinitiator that is present in an amount of from 5 to 40 percent (based on dry composition weight), and
- c) an infrared absorbing compound that has a maximum absorption wavelength in the region of at least 750 nm, and is present in an amount of from 1 to 25 percent (based on dry composition weight).
Dependencies are inferred from the claim text.