Color filter having novel dyestuff
AssigneeMitsui Toatsu Chemicals, Inc.
InventorsAkio Karasawa, Hisato Itoh
Life of this patent
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Abstract
Dyestuffs represented by the below-described formula (1), that is, dyestuffs formed of a chromophoric nucleus and a bisphenol introduced therein have excellent solubility in solvents and binder resins, and can provide color filters having excellent transmittance characteristics and durability. ##STR1## wherein Dye represents a chromophoric nucleus, X represents a direct bond or a divalent connecting group, R.sup.1 to R.sup.10 and n are defined with the provision that one of R.sup.9 and R.sup.10 has 3 or more carbon atoms.
Claims2
A color filter comprising an optically transparent substrate and a dyestuff represented by the following formula ( 5):
- ##STR146## wherein R.sup.1 to R.sup.8 independently represent a hydrogen atom;
- a halogen atom;
- an unsubstituted alkyl group which is linear or branched and has 1 to 20 carbon atoms;
- an alkyl group which is linear or branched and is substituted by at least one of alkoxy, halogen, hydroxyl or amino substituents and has 1 to 30 carbon atoms in total;
- an unsubstituted cycloalkyl group which has 5 to 12 carbon atoms;
- a cycloalkyl group which is substituted by at least one of halogen, alkyl or alkoxy substituents and has 5 to 20 carbon atoms in total;
- an unsubstituted alkoxy group which is linear or branched and has 1 to 10 carbon atoms;
- or an alkoxy group which is linear or branched and is substituted by at least one of alkoxy or halogen substituents and has 1 to 20 carbon atoms in total;
- R.sup.9 and R.sup.10 independently represent a hydrogen atom;
- an unsubstituted alkyl group which is linear or branched and has 1 to 20 carbon atoms;
- or an alkyl group which is linear or branched and is substituted by at least one of alkoxy or halogen substituents and has 1 to 30 carbon atoms in total with the provision that one of R.sup.9 and R.sup.10 has 3 or more carbon atoms;
- R.sup.14 and R.sup.15 independently represent a hydrogen atom;
- an unsubstituted, linear or branched alkyl group having 1 to 20 carbon atoms;
- a linear or branched alkyl group substituted by at least one of halogen, alkoxy, hydroxyl or amino groups and having 1 to 30 carbon atoms in total;
- an unsubstituted, linear or branched alkoxy group having 1 to 20 carbon atoms;
- a linear or branched alkoxy group substituted by at least one of halogen, alkoxy, hydroxyl or amino groups and having 1 to 20 carbon atoms in total;
- or a halogen atom;
- and R.sup.16 represents a hydrogen atom or a halogen atom;
- and X represents --CO--, --COOCH2CO-- or --COOCH.sub.2 CH.sub.2 CO--.
A color filter comprising an optically transparent substrate and a dyestuff represented by the following formula (6):
- ##STR147## wherein R.sup.1 to R.sup.8 independently represent a hydrogen atom;
- a halogen atom;
- an unsubstituted alkyl group which is linear or branched and has 1 to 20 carbon atoms;
- an alkyl group which is linear or branched and is substituted by at least one of alkoxy, halogen, hydroxyl or amino substituents and has 1 to 30 carbon atoms in total;
- an unsubstituted cycloalkyl group which has 5 to 12 carbon atoms;
- a cycloalkyl group which is substituted by at least one of halogen, alkyl or alkoxy substituents and has 5 to 20 carbon atoms in total;
- an unsubstituted alkoxy group which is linear or branched and has 1 to 10 carbon atoms;
- or an alkoxy group which is linear or branched and is substituted by at least one of alkoxy or halogen substituents and has 1 to 20 carbon atoms in total;
- R.sup.9 and R.sup.10 independently represent a hydrogen atom;
- an unsubstituted alkyl group which is linear or branched and has 1 to 20 carbon atoms;
- or an alkyl group which is linear or branched and is substituted by at least one of alkoxy or halogen substituents and has 1 to 30 carbon atoms in total with the provision that one of R.sup.9 and R.sup.10 has 3 or more carbon atoms;
- R.sup.17 represents an unsubstituted, linear or branched alkyl group having 1 to 20 carbon atoms;
- a linear or branched alkyl group substituted by at least one of halogen, alkoxy, hydroxyl or amino groups and having 1 to 30 carbon atoms in total;
- and X represents --CO-- or --COOCH.sub.2 CO--.
Dependencies are inferred from the claim text.