Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making
Patent
1993-03-09
1993-12-07
Brammer, Jack P.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Radiation sensitive composition or product or process of making
430286, 430287, 430288, 430302, 522107, G03C 176
Patent
active
052682579
ABSTRACT:
A photocurable composition P(Y)(Y.sub.1)(Y.sub.2) is prepared by reacting a solid carboxylated copolymer P(Y) having at least one pendent carboxyl group Y, and optionally one or more terminal carboxyl groups Y, with (i) a photosensitive vinyl-containing compound, e.g. glycidyl (meth)acrylate, which produces Y.sub.1 and optionally, with (ii) an anhydride, e.g. maleic anhydride, to produce Y.sub.2. Y.sub.1 has free vinyl groups and Y.sub.2 has free vinyl and acid groups. In addition, P(Y) can be a liquid carboxylated copolymer which is chain extended in order to prepare a solid. Either of the resulting photocurable compositions can be used "as is" or can be formulated with vinyl containing monomers and photoinitiators to prepare solid, flexible photosensitive articles, e.g. flexographic printing plates, which are water dispersible, and yet possess acceptable mechanical properties for flexographic printing.
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Berrier Arthur L.
Mirle Srinivas K.
Brammer Jack P.
Looper Valerie E.
W. R. Grace & Co.,-Conn.
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