Thermochromic opaque/transparent composition, laminate member em

Details Thermochromic opaque/transparent composition, laminate member em Thermochromic opaque/transparent composition, laminate member em

1995-03-23

1996-12-17

Smith, Jeffrey T.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524343, 428520, 428522, C08K 513

Patent

active

055854257

ABSTRACT:
A thermochromic opaque/transparent composition is capable of exhibiting change in transparency together with change in color in response to temperature variation, a laminate member employing the same, and a three-dimensional article capable of concealing and revealing the interior, utilizing the laminate member. A thermochromic opaque/transparent composition is composed of dispersion, in vinyl chloridevinyl acetate copolymer matric resin, which has been obtained by blending with hindered amine compound selected from piperidine derivatives within a particle size range of 0.1 to 2.0 .mu.m, of a reversible thermochromic material consisting of (a) an electron-donating color-developing organic compound, (b) a compound having a phenolic hydroxyl radical, and (c) a homogeneous fused composition containing a compound selected from alcohols, esters, ketones and carboxylic acids, and capable of exhibiting reversible change in transparency together with change in color in response to temperature variation, with hysteresis with a temperature difference of 10.degree. C. to 50.degree. C. between the low and high trigger temperatures.

REFERENCES:
patent: 4221700 (1980-09-01), Minagawa et al.
patent: 4421560 (1983-12-01), Kito et al.
patent: 5490956 (1996-02-01), Kito et al.

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