C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 9/02 (2006.01) B41M 5/30 (2006.01) B41M 5/337 (2006.01) B41M 5/42 (2006.01) C08J 3/20 (2006.01) B41M 5/40 (2006.01)
Patent
CA 2196513
A method of causing metachromatism by the use of a reversible thermochromic composition comprising; (a) an electron donating compound, (b) an electron accepting compound, and (c) a metachromatic temperature adjuster; wherein; (d) an electron accepting, light-fastness providing agent represented by Formula I: Image wherein n represents an integer of 5 to 17 to form a straight-chain or branched alkyl group; X and Y each represent a straight-chain or branched alkyl group having 1 to 4 carbon atoms, or a halogen atom; and p and m each represent an integer of 0 to 3; is brought into presence in an amount of 0.3 part by weight to 70 parts by weight based on 1.0 part by weight of the component-(a) electron donating compound; and (e) a light stabilizer is further brought into presence; to thereby improve the light-fastness of the reversible thermochromic composition at the time of color extinguishment.
Fujita Katsuyuki
Ono Yoshiaki
Shibahashi Yutaka
Macrae & Co.
The Pilot Ink Co. Ltd.
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