COMPOSITIONS AND PROCESSES FOR PHOTOGENERATION OF ACID
申请人:——
公开号:US20010008748A1
公开(公告)日:2001-07-19
Photochemical acid progenitors in combination with dihydroperimidine squarylium dyes have been found to be particularly effective at generating acid upon irradiation with near-infrared radiation. It has been found that dihydroperimidine squarylium dyes that are particularly useful in this invention have an oxidation potential greater than about 0.5 V relative to SCE as measured in dichloromethane.
Selected acid generating agents and their use in processes for imaging radiation-sensitive elements
申请人:——
公开号:US20030219673A1
公开(公告)日:2003-11-27
An acid generating agent useful for imaging photosensitive elements selected from compounds of formulae (I), (II) and (III).
1
wherein R
1
is selected from the group consisting of an unsubstituted and substituted hydrocarbon or aryl group;
wherein X is selected from the group consisting of oxygen, sulfur and selenium;
wherein Y is selected from the group consisting of sulfur, selenium and tellurium;
wherein Ar
1
is selected from the group consisting of an unsubstituted and substituted aryl group;
wherein R
2
, R
3
and R
4
are individually selected from the group consisting of an unsubstituted and substituted hydrocarbon or aryl group or any two of them are bonded together to form a ring structure; and
wherein R
5
and R
6
are individually selected from the group of an unsubstituted and substituted hydrocarbon or aryl group, or are bonded to each other to form a ring structure.
Imageable elements with improved dot stability are disclosed. The imageable elements comprise a layer of an imageable composition over a support. The imageable composition comprises an infrared absorbing compound, an acid generator, an acid activatable crosslinking agent, a polymeric binder, and about 0.01 wt % to 1 wt % of an added onium compound. The elements may be thermally imaged and developed to produce images useful as lithographic printing plates.
Infra red absorbing compounds and their use in photoimageable elements
申请人:——
公开号:US20040180285A1
公开(公告)日:2004-09-16
Infrared absorbing compounds in which the anion is selected from the group consisting of 5-isatinsulfonate, 10-camphorsulfonate, and 4,5-dihydroxy-1,3-benzenedisulfonate are disclosed. Negative-working imageable elements containing these compounds have improved dot stability.
Composition comprising photochemical acid progenitor and specific
申请人:Imation Corp
公开号:US05763134A1
公开(公告)日:1998-06-09
Photochemical acid progenitors in combination with dihydroperimidine squarylium dyes have been found to be particularly effective at generating acid upon irradiation with near-infrared radiation. It has been found that dihydroperimidine squarylium dyes that are particularly useful in this invention have an oxidation potential greater than about 0.5 V relative to SCE as measured in dichloromethane.