PRINTING FORM PRECURSOR AND PRINTING FORM THEREOF
The invention pertains to a printing form precursor, and particularly a printing form precursor that can form printing forms, or printing plates, having improved properties. The printing form precursor includes a photopolymerizable composition containing an additive having a structure of Formula (I). The presence of the additive results in ease of processing and/or better cleanout and reduction in webmarkings on solid areas of the printing form.
1 . A printing form precursor comprising a photopolymerizable layer, wherein said photopolymerizable layer comprises a binder, a monomer, a photoinitiator, and an additive; wherein said additive comprises one or more compounds having a structure of Formula (I):
wherein each A is independently —R 1 -OR 2 or R 3 ; each R 1 is independently —CR 4 R 5 —; each R 2 is independently C 1 -C 6 alkyl or C 1 -C 4 alkyl substituted by C 1 —C 4 alkyl; each R 3 is independently or C 1 -C 6 alkyl; and each R 4 and R 5 are independently H or C 1 -C 6 alkyl.
2 . The printing form precursor of claim 1 further comprising a digital layer that is ablatable by infrared radiation and opaque to non-infrared actinic radiation.
3 . The printing form precursor of claim 2 , wherein each A is —R 1 -OR 2 .
4 . The printing form precursor of claim 3 , wherein each Ris —CR 4 R 5 —;
5 . The printing form precursor of claim 4 , wherein at least one R 2 is C 1 -C 4 alkyl.
6 . The printing form precursor of claim 5 , wherein each R 4 and R 5 are H.
7 . The printing form precursor of claim 4 , wherein each R 2 is C 1 -C 4 alkyl.
8 . The printing form precursor of claim 7 , wherein each R 4 and R 5 are H.
9 . The printing form precursor of claim 4 , wherein at least one R 2 is C 1 alkyl.
10 . The printing form precursor of claim 9 , wherein each R b 4 and R 5 are H.
11 . The printing form precursor of claim 4 , wherein each R 2 is C 1 alkyl.
12 . The printing form precursor of claim 2 , wherein at least one A is R 3 .
13 . The printing form precursor of claim 2 , wherein each A is R 3 .
14 . The printing form precursor of claim 13 , wherein at least one R 3 is C 1 -C 4 alkyl.
15 . The printing form precursor of claim 13 , wherein each R 3 is C 1 -C 4 alkyl.