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
1999-05-27
2000-04-04
Codd, Bernard
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Radiation sensitive composition or product or process of making
4302811, 4302861, 4302871, 430311, 430325, G03C 173, G03C 500
Patent
active
060459727
ABSTRACT:
The claimed invention relates to a method for coating a substrate, preferably a printed circuit board, comprising the step of applying to said substrate surface a photopolymerizable water-borne aqueous-alkaline developable coating composition. The novel composition comprises a certain film-forming, acid group-containing acrylated derivative of an epoxy resin which is sufficiently neutralized with ammonia or an amine or an inorganic base to promote the formation of the corresponding ammonium or amine or inorganic base carboxylates by a neutralization reaction; a photoinitiator; water; and, optional components; as well as one or more additional optional (meth)acrylate monomer or (meth)acrylate oligomer or a vinyl compound that can be crosslinked with light. The method produces coated substrates that are non-tacky after drying and that have good edge coverage.
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Derwent Abstr. 92-394823.
Roth Martin
Salvin Roger Pierre-Elie
Ciba Specialty Chemicals Corp.
Codd Bernard
Kovaleski Michele A.
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