Thermochromic laminate member, and composition and sheet for producing the same
AssigneeThe Pilot Ink Co., Ltd.
InventorsYutaka Shibahashi, Michiyuki Yasuda
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Abstract
A thermochromic laminate member capable of reversible change from a metallic luster color to a colorless state, comprises a first layer for regulating the wavelength of reflected light, composed of a metal luster pigment, which consists of natural mica surfacially covered with titanium oxide and has a grain size of 5 to 100 .mu.m, and a film forming material; and a second layer composed of a thermochromic material, which consists of an electron donating compound, an electron accepting compound, and an organic medium enabling a reversible color-forming reaction between said compounds and has a luminocity value of 6 or lower in the colored state and a luminocity value of 8 or higher in the colorless state, and a film forming material.
Claims20
A thermochromic laminate member capable of reversible change between a metallic luster color and a colorless state, comprising:
- A) a first layer for regulating the wavelength of reflected light, composed of a metallic luster pigment, which consists of natural mica particles surfacially coated with titanium oxide and which has a particle size of 5 to 100 .mu.m, and a film forming material;
- and
- B) a second layer composed of a thermochromic material, which consists of an electron donating compound, an electron accepting compound, and an organic medium enabling a reversible color-forming reaction between said compounds and which has a luminocity of 6 or lower in the color-developed state and a luminocity of 8 or higher in the color-extinguished state, and a film forming material.
A sheet for forming thermochromic laminate member capable of reversible change between a metallic luster color and a colorless state, comprising a combination of:
- A) a metallic luster sheet molded from a metallic luster pigment consisting of natural mica particles surfacially coated with titanium oxide and having a particle size of 5 to 100 .mu.m, and synthetic resin;
- and
- B) a thermochromic sheet molded from a therochromic material, which consists of an electron donating compound, an electron accepting compound, and an organic medium capable of causing a reversible color-forming reaction between said compounds and which has a luminocity of 6 or lower in the color-developed state and a luminocity of 8 or higher in the color-extinguished state, and synthetic resin.
Dependencies are inferred from the claim text.