Conformal coating systems

Details Conformal coating systems Conformal coating systems

H - Electricity

05

K

96/172, 400/4024

H05K 3/28 (2006.01) B05D 3/06 (2006.01) C08F 299/06 (2006.01) C08G 18/10 (2006.01) C08G 18/67 (2006.01) C09D 4/00 (2006.01)

Patent

CA 1238134

- 25 - ABSTRACT OF THE DISCLOSURE Ultraviolet curable polymerizable coating composition having one or more built-in secondary curing mechanisms is disclosed. The polymerizable coating composition is a two part system comprising (1) a first component comprising at least one urethane-acrylate or methacrylate, and a mono or polyfunctional acrylate or methacrylate diluent and a polymerization initiator of the photo-initiator type, and (2) a second part comprising a polyisocyanate. At least one component of the first part contains unreacted hydroxyl groups. The composition has an equivalent weight excess of isocyanate groups in the second part to the hydroxyl groups in the first part of at least 2:1. The coating composition is uv curable, and also possess at least one additional cure mechanism.

439412

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