초록 ▼

The invention relates to a thermochromic liquid crystalline medium comprising a liquid crystalline host component and an active component, to a thermochromic ink comprising such a thermochromic liquid crystalline medium encapsulated in a light transmissive polymeric material, to the use of a thermoc

The invention relates to a thermochromic liquid crystalline medium comprising a liquid crystalline host component and an active component, to a thermochromic ink comprising such a thermochromic liquid crystalline medium encapsulated in a light transmissive polymeric material, to the use of a thermochromic medium or ink in decorative applications like pigments, inks and paints, cosmetics, thermodiagnostic applications like medical thermography, thermometry, optical and electrooptical applications, and security applications and devices, to a security marking or device comprising a thermochromic liquid crystalline medium or thermochromic ink and to a document of value comprising such a security marking.

대표청구항 ▼

The invention relates to a thermochromic liquid crystalline medium comprising a liquid crystalline host component and an active component, to a thermochromic ink comprising such a thermochromic liquid crystalline medium encapsulated in a light transmissive polymeric material, to the use of a thermoc

The invention relates to a thermochromic liquid crystalline medium comprising a liquid crystalline host component and an active component, to a thermochromic ink comprising such a thermochromic liquid crystalline medium encapsulated in a light transmissive polymeric material, to the use of a thermochromic medium or ink in decorative applications like pigments, inks and paints, cosmetics, thermodiagnostic applications like medical thermography, thermometry, optical and electrooptical applications, and security applications and devices, to a security marking or device comprising a thermochromic liquid crystalline medium or thermochromic ink and to a document of value comprising such a security marking. 020641 High-Molecular Liquid Crystal and Liquid Crystal Element; Jan. 23, 1996. Japanese Abstract: JP-A-08301859; "Oxetane compound and Its Polymer" Nov. 19, 1996. Lu Y.-H., et al., Polymer Bulletin, 32:551-448 (1994); "Synthesis of Side-Chain Liquid Crystalline Polyoxetanes Containing 4-Dodecanyloxyphenyl Trans-4-Alkylcyclohexanoate Side Groups". Macromolecules 28:1673-1680 (1995); "Synthesis of Side-Chain Liquid Crystalline Polyoxetanes Containing 4-(Alkanyloxy) Phenyl Trans-R-Alkylcyclohexanoate Side Groups". H. Ogawa, et al., Bull. Chem. Soc. Jpn. 70: 1649-1657 (1997); Side-Chain Liquid-Crystalline Polyoxetanes with a Spacer-Separated Azobenzene Moiety. III. Preparation and Characterization of Polyoxetanes Anchoring the Mesogen Cores of a p-Spacer-Substituted Phenyl 4-(4-Alkoxyphenylazo) benzoate in the Side Chain. Japanese Abstract; JP-A-07225370; Aug. 22, 1995; "Liquid Crystal Element and IRTS Production".