A dichroic dye composition, containing at least one kind of azo dye represented by formula (I) that has a liquid crystallinity:
wherein R
1
, R
2
, R
3
, R
4
, X
1
and X
2
each independently represent a hydrogen atom or a substituent; A
1
is a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, or a substituted or unsubstituted aromatic heterocyclic group; B
1
is a divalent substituted or unsubstituted aromatic hydrocarbon group or a divalent substituted or unsubstituted aromatic heterocyclic group; n represents an integer of 1 to 5; and at least one of B
1
s represents a phenylene group having an alkyl group.
FILM AND PROCESS FOR PRODUCING THE SAME
申请人:Yamanouchi Junichi
公开号:US20100255249A1
公开(公告)日:2010-10-07
A surfactant is added to a polymer solution (
21
) which is a coating fluid comprising an organic solvent and a polymer. The surfactant contains a fluorine atom and reduces the surface tension of the coating fluid. The coating fluid (
21
) is applied to a casting band (
26
) as a support. Dew condensation is caused to occur on the surface of the polymer film (
40
) formed by coating fluid application. The organic solvent and droplets are vaporized to thereby cause droplets to come into the film and form voids. By the use of the polymer solution (
21
), which comprises a mixture of an organic solvent, a polymer, and a fluorine-atom-containing surfactant for surface tension reduction, a structure having such fine pores is formed and a film (
12
) of a honeycomb structure is obtained. This film is reduced in the adhesion of dust, etc. and has an even micropore structure