Bodies with reversibly variable temperature-dependent light abso

Details Bodies with reversibly variable temperature-dependent light abso Bodies with reversibly variable temperature-dependent light abso

1978-08-09

1981-05-19

Gron, Teddy S.

Compositions

Nonreactive analytical, testing, or indicating compositions

73356, 73358, 116207, 116216, 116217, 252300, 428 67, 428323, 428542, G01K 1106, G01K 1116, G01K 1118, C09K 300

Patent

active

042684137

ABSTRACT:
In order, in the case of bodies with reversibly-variable absorbence, to adjust the zone of transition from transparent to opaque or vice versa at desired goal temperatures and to give the bodies a preferred form, such as sheet form, they consist of a substantially optically transparent polymeric and/or resinous matrix material (A) and an organic substance (B) which is embedded therein as a dispersed second phase and which is at least partially insoluble therein, and which melts or congeals at the goal temperature of light-absorbence variation, and the refractive index of which, either above or below the goal temperature of the light-absorbence variation, substantially agrees with the refractive index of the matrix material.
Such bodies are usable in sheet (or film) form, for example, for temperature-measuring devices, temperature-indicating devices, and slippery-ice warning devices, as well as for devices on glass windows for protection against solar irradiation.

REFERENCES:
patent: 2261473 (1941-11-01), Jennings
patent: 2269038 (1942-01-01), Perry
patent: 2928791 (1960-03-01), Loconti
patent: 3585259 (1971-06-01), Lefferts et al.
patent: 3620889 (1971-11-01), Baltzer
patent: 3845662 (1974-11-01), Surgina et al.
patent: 3956153 (1976-05-01), Chadha
patent: 3980581 (1976-09-01), Godsey, Jr. et al.
patent: 4022706 (1977-05-01), Davis
patent: 4142416 (1979-03-01), Smith et al.
patent: 4150572 (1979-04-01), Lindquist
patent: 4154106 (1979-05-01), Inoue et al.

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