초록 ▼

A reversible thermochromic material is disclosed in the application. The material is comprised of (A) an electron-donating chromatic organic compound and (B) an acidic phosphoric acid ester compound or metal salt thereof, wherein Components (A) and (B) are contained in a weight ratio of 1:1/10 to 50

A reversible thermochromic material is disclosed in the application. The material is comprised of (A) an electron-donating chromatic organic compound and (B) an acidic phosphoric acid ester compound or metal salt thereof, wherein Components (A) and (B) are contained in a weight ratio of 1:1/10 to 50 by weight. The material may also contain a third Component (C) for controlling the temperature of coloration/decoloration of the thermochromatic material. The thermochromatic material undergoes reversible metachromatism at a temperature within the range of -50°C. to 120°C. Furthermore, the reversible thermochromic material may be contained within microcapsules.

대표청구항 ▼

A reversible thermochromic material comprising: (A) one or more electron-donating chromatic organic compounds selected from the group consisting of diaryl phthalides, indolyl phthalides, polyaryl carbinols, leuco auramines, acyl auramines, aryl auramines, Rhodamine B lactam, indolines, spiropyrans a

A reversible thermochromic material comprising: (A) one or more electron-donating chromatic organic compounds selected from the group consisting of diaryl phthalides, indolyl phthalides, polyaryl carbinols, leuco auramines, acyl auramines, aryl auramines, Rhodamine B lactam, indolines, spiropyrans and fluorans, and (B) one or more acidic phosphoric acid ester compounds of the following general formula (I): [Figure] (I) wherein R1 and R2, which may be the same or different, each represents hydrogen, an alkyl group having from 1 to 22 carbon atoms, a branched alkyl group having from 3 to 20 carbon atoms, an alkenyl group having from 3 to 20 carbon atoms, a cycloalkyl group having from 5 to 24 carbon atoms or an aryl group having from 6 to 20 carbon atoms in proviso that R1 and R2 do not represent hydrogen at the same time, and M represents hydrogen, sodium, potassium, lithium, calcium, zinc, zirconium, aluminum, magnesium, nickel, cobalt, tin, copper, iron, vanadium, titanium, lead or molybdenum, the ratio of Component (A) to Component (B) being 1:1/10 to 50 by weight, said thermochromic material undergoing reversible metachromatism at a temperature within the range of from 40°C. to 120°C.