Ultraviolet protective overcoat for application to heat sensitive record materials
US4886774A · kind A · utility
Inventor
Key dates
| Filing date | Aug 9, 1988 |
| Grant date | Dec 12, 1989 |
| Priority date | — |
| Expiry date | Aug 9, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24934
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.