Adhering resins to substrates, especially metal, by radiation

Abstract

Abstract A process for coating by radiation a substrate, and especially one having a metallic surface, with a substantially catalyst-free system containing a polymerizable organic unsaturated resin susceptible to free-radical catalysis; and the resulting product. In one form, a film of the resin is superimposed upon the substrate while a facing side of either the resinous film or substrate is contacted at any time prior to such radiation with a selected chromium Werner complex. The Werner complex has a polar moiety attractive to the substrate and an organic unsaturated moiety which is sufficiently responsive to high energy radiation to react chemically with the resin. Thereafter, the film and substrate are subjected to the high energy radiation to adhere one to the other. The process is also adapted for coating articles with normally air-inhibited, thermosetting resins by a two-step process, wherein the resin film is first passed through one treating zone effective to impart mass integrity and thereby define a sheet, and the sheet together with the Werner complex and the substrate is then passed through another treating zone effective substantially to complete the cure of the resin and simultaneously adhere the sheet to the substrate, at least one of the treating zones comprising exposure to high energy radiation.

Inventors

• 👤 Roger P Hall

Bibliographic Details