C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
204/91.79
C08J 7/10 (1980.01)
Patent
CA 1140492
ABSTRACT OF THE DISCLOSURE A method for the high speed coating of various sub- strates utilizes an epoxy composition containing a radiation- sensitive catalyst precursor which will decompose upon exposure to electromagnetic radiation to provide a Lewis acid effective to induce cationic polymerization of the epoxy composition. The formulation does not require any special epoxy monomeric materials or accelerators and is stable until so exposed. Subsequent to applying the formulation to the substrate, the coating is exposed to electromagnetic radiation and a controlled temperature of 50-90°C. is maintained in the coating for a limited period of time to effect polymerization of the for- mulation to a tack free surface condition within a period of less than 30 seconds. Maintenance at the elevated temperature following initiation of irradiation may be for a period of as little as 0.5 seconds.
357460
Guarnery Joseph M.
Watt William R.
American Can Company
Marks & Clerk
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