IMPROVED CHEMICAL COMPOUNDS THAT UNDERGO REVERSIBLE CHANGES IN PROPERTIES AND USES THEREOF

摘要

Free radical scavengers, especially those that require the presence of oxygen, are useful in extending the life of photochromic, thermochromic, electrochromic, radiochromic, magnetochromic, photo-electrochromic and similar dyes. Particularly, preferred scavengers are the quinones be it O, M or p- and, most preferably, either the ortho, meta or para-hydroquinone. The so-enhanced dye can be used as a coating or cast as a film.

主权项

1. An extended useful life reversible dye comprising:
(a) a dye selected from the group consisting of: photochromic, thermochromic, electrochromic, radiochromic, magnetochromic and photo-electrochromic dyes; and (b) an effective amount of a free radical scavenger.