Thermochromic materials

Details Thermochromic materials Thermochromic materials

1991-08-20

1994-03-15

Tucker, Philip

Compositions

Light transmission modifying compositions

Modification caused by energy other than light

549 41, 549 51, 549 52, 549265, G02F 100, C07D33350, C07D33362, C07D30514

Patent

active

052943755

ABSTRACT:
Disclosed is a class of bridged phthalides and sulfinate esters which exhibit reversible thermochromism. At room temperature and in the presence of base, these compounds are substantially colorless but upon the application of heat they become colored, reverting to their original colorless or weakly colored state upon cooling. This colorless to colored, temperature-dependent cycle can be repeated many times. These compounds have utility as temperature sensors and as thermal pH indicators.

REFERENCES:
patent: 4567019 (1986-01-01), Lawton
patent: 4820840 (1989-04-01), Ikegama
patent: 4886733 (1989-12-01), Simon
Day, J. H., Chem. Revs., 63, pp. 65-80 (1963).
Sabongi, G. J., Chemical Triggering, Reactions of Potential Utility in Industrial Processes, Ch. 5, pp. 240-278 (1987).
Wolfers, O. S., Fiber Optic Chemical Sensors and Biosensors, vol. 2, CRC Press, Ch. 15, pp. 154-161 (1991).
Kazakova, Chemical Abstracts, 89:148275b, vol. 89, 1978.

Affiliated with

Also associated with

Rating

Thermochromic materials does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Thermochromic materials, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermochromic materials will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1534223