Low gloss UV-cured coatings for aircraft

摘要

A method of applying a low gloss coating to a substrate such as the exterior surface of an aircraft is disclosed. The coating composition comprising a polyene, a polythiol, a flatting agent and a coloring pigment is applied to the substrate and given a first dosage of UV radiation followed by a second dosage in which the second dosage is greater than the first resulting in an ultralow gloss coating.

主权项

1. A method of providing a cured topcoating on the exterior surface of an aircraft comprising:
(a) spraying manually to a primer coating on the exterior surface of the aircraft a topcoat composition comprising:
(i) a polyene,(ii) a polythiol,(iii) 15 to 60 percent by weight of a flatting agent, and(iv) a coloring pigment that is a mixture of 20 to 50 percent by weight of titanium dioxide and 0.1 to 10 percent by weight of carbon black, the percentages being based on total weight of the coating composition; (b) forming a film on the exterior surface of the aircraft; (c) exposing manually the film to a first dosage of UV radiation having a first wavelength range; and then (d) exposing manually the film to a second dosage of UV radiation having a second wavelength range wherein the second dosage is greater than the first dosage and the cured film has an 85° gloss of less than 10.