Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Forming nonplanar surface
Patent
1984-05-01
1986-02-25
Brammer, Jack P.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Forming nonplanar surface
430281, 430327, 430328, 430330, 428 44, 427 12, G03C 500
Patent
active
045728909
ABSTRACT:
A layer of a liquid composition containing (A) a compound containing at least one heat-polymerizable, ethylenically-unsaturated group, (B) a photopolymerizable material, and (C) a thermally-activated free radical initiator for polymerization of (A), is heated to solidify the layer, and subsequently it is exposed to actinic radiation in a predetermined pattern and those parts of the layer that have not become photopolymerized are removed by treatment with a suitable solvent.
An example of an unsaturated, heat polymerizable compound (A) is butanediol dimethacrylate. An example of a photopolymerizable material (B) is an epoxidized novolak of 2,2-bis(4-hydroxyphenyl)propane with triphenylsulfonium hexafluorophosphate. A typical thermally-activated, free radical initiator (C) is cumene hydroperoxide.
The process is suitable for the manufacture of printing plates and printed circuits.
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Beringer and Bodlaender, J. Org. Chem., 1968, 33 2981-2984.
Goodin Jonathan W.
Irving Edward
Brammer Jack P.
Ciba-Geigy Corporation
Falber Harry
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