C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 5/38 (2006.01) A63F 3/06 (2006.01) C09D 133/06 (2006.01) C08L 33/06 (2006.01)
Patent
CA 2074589
A scratch-off coating composition and method for application of the coating to lottery forms, and the like, are provided herein. The scratch-off coating employs a water-based dispersion of acrylic resin, at equal proportions of resin and water, by weight. The dispersion is adjusted to a pH greater than 7.0, and a surfactant is preferably added as a wetting, defoaming and/or dispersing agent. A pigment of metallic particles, e.g., aluminum paste is added, together with a powdered filler, e.g., calcium carbonate, at 5 % to 25 % by weight of the coating composition. The composition can be applied in successive layers, including outer layers of relatively higher proportions of resin for improving wet rub resistance. A number of ink formulations are disclosed for the outer surface layers.
Borden Ladner Gervais Llp
Carrick Bryan W.
Gtech Rhode Island Corporation
LandOfFree
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