C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
400/5048, 400/51
C09D 3/58 (1980.01)
Patent
CA 1145878
ABSTRACT OF THE DISCLOSURE A polymerizable coating composition comprises 35-80 parts of an epoxy prepolymer material and 20-65 parts of a vinyl chloride dispersion polymer together with 0.5-10 percent by weight, based upon the weight of the epoxy prepolymer material, of a photo- initiator which decomposes upon exposure to electromagnetic radiation to initiate polymerization of the epoxy prepolymer material. The coating is applied to the surface of a substrate and then exposed to a source of electromagnetic radiation to decompose the photoinitiator and initiate polymerization of the epoxy prepolymer material to a tack-free surface condition in which the vinyl chloride polymer is dispersed within the epoxy polymer. This is desirably effected by maintaining the coating at a temperature of about 50-90°C. for a limited time following exposure to radiation. After the coating has been cured to a tack-free condition, it is desirably baked at a temperature of at least 150°C. to effect substantial fusion of the vinyl chloride polymer and cross-linking of the epoxy polymer.
356826
Guarnery Joseph M.
Kester Dennis E.
American Can Company
Marks & Clerk
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