申请人:Hall-Goulle Véronique
公开号:US20100227199A1
公开(公告)日:2010-09-09
The invention relates to a process for enhancing the contrast of colour filters comprising α copper phthalocyanine or ε copper phthalocyanine, wherein a 1,4-diamino-anthraquinone dye or 1,9-annellated derivative thereof, of which the most bathochromic solution absorption peak in the visible spectrum is at from 575 to 615 nm, preferably at from 585 to 605 nm (as compared with around 630 nm for usual 1,4-diamino-anthraquinone dyes or 1,9-annellated derivatives thereof) is used in combination with α copper phthalocyanine or ε copper phthalocyanine. Also claimed are colour filters comprising such 1,4-diamino-anthraquinone dyes or 1,9-annellated derivatives thereof, as well as a novel compound of Formula (II), wherein R
16
is halogen, phenyl, benzyl or C
1
-C
8
alkyl and R
17
is H, R
16
is H and R
17
is C
1
-C
8
alkyl, or R
16
and R
17
are both H; R
18
is H, halogen, C
1
-C
8
alkyl or SO
2
NR
13
R
14
; R
19
, R
20
and R
21
are each independently from the others halogen or C
1
-C
8
alkyl; and R
22
is independently from R
18
SO
2
NR
13
R
14
, with the proviso that at least one of R
18
and R
22
is SO
2
NR
13
R
14
, and two radicals of Formula (II) can optionally be linked together via a direct bond or a group —O—, —S—, —NR
14
—, —CO—, —CO
2
—, —CONR
14
— or —CO
2
— connecting together each a substituent R
16
, R
17
, R
18
, R
19
, R
20
, R
21
and R
11
from both radicals of formula (II).