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US 4,785,062 AGranted
Reaction product of O-epoxyalkylated tetrakis(hydroxyphenyl)ethane resin and phenol with product having no remaining epoxy groups
AssigneeW. R. Grace & Co.-Conn.
InventorAlan R. Browne
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Abstract
This invention is directed to the reaction product of an O-epoxyalkylated tetrakis (hydroxyphenyl) alkane resin with a phenol, which is used either as an upper layer over a lower layer of a diazo resin in a bi-layer system or as a homogeneous mixture with a diazo resin in a mono-layer system to provide a water-developable, negative-working, lithographic printing plate.
Claims1
A composition comsisting of the reaction product of an O-epoxyalkylated tetrakis (hydroxyphenyl) ethane resin and sufficient substituted or unsubstituted phenol to react with all the epoxy groups, said reaction product being a group member of the formula:
- ##STR6## wherein R is ##STR7## and X is H, halogen, alkoxy containing 1 to 8 carbon atoms, alkyl containing 1 to 14 carbon atoms, aryl containing 6 to 14 carbon atoms and aralkyl containing 6 to 14 carbon atoms.
Dependencies are inferred from the claim text.