Ultraviolet protective overcoat for application to heat sensitiv

Record receiver having plural interactive leaves or a colorless – Having a colorless color-former – developer therefor – or... – Spatial relationship specified between color-former and...

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Details

427150, 427151, 427152, 428211, 428913, 503200, B41M 518

Patent

active

048867748

ABSTRACT:
Disclosed is an ultraviolet curable/ultraviolet protective overcoating for application to heat and/or pressure sensitive record materials known to undergo degratory effects when exposed to ultraviolet radiation within a known "photodegratory" wavelength range. The overcoatings of the invention generally contain a first additive which promotes curing of the overcoating by UV radiation outside of the "photodegratory" range and a second additive which remains present within the cured overcoat and serves to absorb or otherwise prevent transmission of UV radiation within the "photodegratory" range. Additionally, the overcoatings of the invention may contain a third additive capable of acting as a free radical scavenger within the cured overcoating, thereby preventing or minimizing certain degratory effects of free radicals within or adjacent to the cured overcoating.

REFERENCES:
patent: 4484204 (1984-11-01), Yamamoto et al.
patent: 4663642 (1987-05-01), Kameda et al.
Dr. G. Pasternack, Radiation Curable Coatings-A Technology for the 1980's, pp. 1-18.
Roland Winter, Stabilizers, Ultraviolet, Modern Plastics Encyclopedia 1988, pp. 177-178.
Modern Plastics Encyclopedia 1988, pp. 651-652.
Irgacure 184, Photoinitiator for Ultraviolet Curing of Coatings, Ciba-Geigy Brochure, Ciba-Geigy Corp, 1986.
Tinuvin 1130, Liquid Ultraviolet Light Absorber for Coatings, Ciba-Geigy Brochure, Ciba-Geigy Corp. 1987.
DeSolite Data 950.times.333, Flier from DeSoto, Inc.
Tinuvin 292, Hindered Amine Light Stabilizer for Coatings, Ciba-Geigy Brochure, Ciba-Geigy Corp., 1981.

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