| 摘要 |
The present invention provides heat-sensitive coating compositions, which comprise a a colour developer of formula (1) or mixtures thereof wherein R1 can be hydrogen, C1-20-alkyl, C3-8-cycloalkyl, C2-10-alkenyl, aryl or SO3H, and R2 and R3 can be the same or different and can be hydrogen, halogen, C1 -20-alkyl, C3-8-cyclo-alkyl, C2-10-alkenyl, aryl, OR6, NR7R8, SR9, SO3H or C OOR10 and R4 and R5 can be the same or different, and can be hydrogen, halog en, C1-20-alkyl, C3-8-cyclo-alkyl, C2-10-alkenyl, aryl, OR6, NR7R8 or SR9, R 6, R7, R8, R9 and R10 can be the same or different and can be hydrogen, C1-3 0-alkyl, C3-8-cycloalkyl, C2-10-alkenyl or aryl, wherein C1-20-alkyl can be unsubstituted or substituted with one or more C3-8-cycloalkyl, C2-10-alkenyl , phenyl, halogen, OR11, NR12R13, SR14, SO3H or COOR15, and aryl can be unsu bstituted or substituted with one or more halogen, C1-10-alkyl, halogenated C1-10-alkyl, C3-8-cycloalkyl, C2-10-alkenyl, phenyl, OR11, NR12R13, SR14, SO 3H or COOR15, wherein R11, R12, R13, R14 and R15 can be the same or differen t and can be hydrogen, C1-10-alkyl, C3-8-cycloalkyl or C2-10-alkenyl, a proc ess for the preparation of these compositions, a process of coating substrat es with these compositions, substrates coated with these compositions, a pro cess for preparing marked substrates using these compositions, marked substr ates obtainable by the latter process, and certain colour developers. |
