Process for the preparation of cyanine dyes with polysulfonate anions
申请人:Tao Ting
公开号:US20050113546A1
公开(公告)日:2005-05-26
A convenient and economical method for preparing infrared absorbing cyanine dyes useful in lithographic printing plate precursors is disclosed. The reaction is generally carried out by condensation of a heterocyclic base containing an activated methylene group and an unsaturated bisaldehyde or its equivalent in a solvent or solvent mixture at about 20-150° C. All the reactions necessary for production of the infrared absorbing cyanine dye may be carried out in one reaction vessel without isolating any intermediate products.
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.
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.
ALKALI RESISTANT POLYMERIC INTERLAYERS FOR LITHOPLATES
申请人:Hunter Joseph
公开号:US20060046198A1
公开(公告)日:2006-03-02
Substrates for lithographic printing plate precursors and lithographic printing plate precursors are disclosed. The substrates comprise an aluminum or aluminum alloy support and the a layer of interlayer material on the support. The interlayer material is a co-polymer that comprise (1) acid groups and/or phosphonic acid groups, and (2) silyl groups substituted with three alkoxy and/or phenoxy groups. The lithographic printing plate precursors additionally comprise an imageable layer over the interlayer.
Substrate for lithographic printing plate precursor
申请人:Hayashi Koji
公开号:US20060040117A1
公开(公告)日:2006-02-23
Substrates for imageable elements are disclosed. The substrates comprise, in order, an aluminum or aluminum alloy support, a silicate layer, and a layer of interlayer material. The interlayer material is a co-polymer that comprise (1) phosphonic acid groups and/or phosphate groups and (2) acid groups and/or groups that comprise ethylene glycol or polyethylene glycol side chains. Imageable elements that comprise an imageable layer over the interlayer material are useful as lithographic printing plate precursors.