The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 04, 2000
Filed:
May. 27, 1999
Roger Pierre-Elie Salvin, Weil am Rhein, DE;
Martin Roth, Giffers, CH;
Ciba Specialty Chemicals Corp., Tarrytown, NY (US);
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.