abstract |
The present invention relates to novel compounds of formula (I): wherein: R1 is H or phenyl, R2 is H or phenyl, and - n = 1-8. The present invention also relates to thermochromic pigment compositions comprising compounds of formula (I) according to the invention, thermochromic pigment microcapsules comprising such thermochromic pigment compositions, ink compositions comprising such microcapsules of thermochromic pigment, and and finally writing instruments comprising such ink compositions. |