Lithographic printing plates precursors comprising a radiation sensitive imageable layer with a crosslinked surface
AssigneeMylan Group
InventorsMy T. Nguyen, Thanh Sang Nguyen, Thanh Dien Luu, Thi Thuy Linh Kien
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Abstract
There are free radical scavengers of formula (Pm-L)n-Tq. Also provided are negative-working lithographic printing plate precursors comprising a hydrophilic substrate and a NIR photopolymerizable or UV-violet photopolymerizable imageable layer coated on the hydrophilic layer, the imageable layer also being photopolymerizable by visible light, the imageable layer having an outer surface and a thickness, the outer surface of the imageable layer being uniformly, and partially or completely crosslinked down to a depth corresponding to at most about 70% of the thickness of the imageable layer.
Claims17
1-34. (canceled)
A free radical scavenger of formula:
- (Pm-L)n-Tq,
- wherein:
- P is a radical polymerizable functional group or a substituent formed by joining two or more radical polymerizable functional groups together;
- L is a linker having a valence equal to m+q;
- T is a thiol group, or a substituent comprising a thiol group and optionally further comprising a carboxylic acid group, wherein said substituent has a valence equal to n;
- m is an integer between 1 to 5;
- n is an integer between 1 to 5;
- and
- q is an integer between 1 to 5.
Dependencies are inferred from the claim text.