| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a temperature sensitive color changing composition having excellent color fastness to an ultraviolet light and a visible light. <P>SOLUTION: The temperature sensitive color changing composition contains, as active ingredients, a leuco dye, a color developer, and an agent for adjusting the temperature at which the color changes, and it also contains a light resistance improver comprising a compound represented by formula (1) or formula (2) (wherein R<SB>1</SB>to R<SB>4</SB>are each a 1-5C branched or linear alkyl group or H; R<SB>5</SB>is a 1-20C branched or linear alkyl group, or a cyclic hydrocarbon group; X<SB>1</SB>to X<SB>4</SB>are each a hydroxy group, a 1-5C branched or linear alkyl group, a 1-5C branched or linear alkoxy group, or H; m and n are each an integer of 1 or 0; and A<SB>1</SB>and A<SB>2</SB>are each O, S, or a direct bond). <P>COPYRIGHT: (C)2004,JPO</p> |
