EP0348964A2
Expired / Lapsed
EP
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Polarizing film
Assignee: Mitsubishi Chemical Corp
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Filing: 1989-06-29
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Granted: —
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Expires: 2009-06-29
Abstract
Abstract A polarizing film comprising a dichroic substance having liquid crystal properties dispersed in a hydrophobic resin, which dichroic substance is highly oriented. A polarizing film having excellent polarizing performance as well as excellent durability can be obtained.
Inventors
- 👤 Hideo Advanced Materials Laboratory Toda
- 👤 Toshiaki Advanced Materials Laboratory Ishibashi
- 👤 Akira Advanced Materials Laboratory Itsubo
- 👤 Takao C/O Plastics Laboratory Usami
- 👤 Etsushi C/O Plastics Laboratory Akashige
- 👤 Katsumi C/O Plastics Laboratory Okuyama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 22:06
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/30; G02B5/3025; G02B5/3033; C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/24; C09K19/32; C09K19/52; C09K19/60; G02B5/3016
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
19 words
A polarizing film, comprising a dichroic substance having liquid crystal properties contained and highly oriented in a hydrophobic resin.
Claim 2
Dependent Claim
19 words
A polarizing film, comprising a dichroic substance having liquid crystal properties contained and highly oriented in a hydrophobic resin.
Claim 3
Dependent Claim
36 words
A polarizing film according to Claim 1, wherein the dichroic substance having liquid crystal properties is contained in an amount of 0.001 to 15 % by weight per 100 parts by weight of the hydrophobic resin.
Claim 4
Dependent Claim
36 words
A polarizing film according to Claim 1, wherein the dichroic substance having liquid crystal properties is contained in an amount of 0.001 to 5 % by weight per 100 parts by weight of the hydrophobic resin.
Claim 5
Dependent Claim
24 words
A polarizing film according to Claim 1, wherein the hydrophobic resin is selected from a polyolefin, a polyvinylidene halide, a polyester and a polyamide.
Claim 6
Dependent Claim
37 words
A polarizing film according to Claim 1, which is obtained by kneading the dichroic substance having liquid crystal properties and the hydrophobic substance, fabricating a film by melting and extruding the kneaded product, followed by uniaxial stretching.
Claim 7
Dependent Claim
16 words
A polarizing film according to Claim 5, wherein uniaxial stretching is effected to 1.1 to 18-fold.
Claim 8
Dependent Claim
57 words
A polarizing film according to Claim 5, which is obtained by carrying out kneading at a temperature at which said dichroic substance having liquid crystal properties exhibits liquid crystal state or isotropic liquid state, and effecting uniaxial stretching at a temperature at which said dichroic substance having liquid crystal properties exhibits crystal state or liquid crystal state.
Claim 9
Dependent Claim
58 words
A polarizing film according to Claim 5, which is obtained by effecting uniaxial stretching at a temperature being a melting point of the hydrophobic resin (T m ) - 100 °C to T m - 5 °C and/or a glass transition temperature of the hydrophobic resin (T g ) - 50 °C to T g + 100 °C.
Claim 10
Dependent Claim
25 words
A polarizing film according to Claim 1, wherein a maximum absorption wavelength of the dichroic substance having liquid crystal properties is 250 nm or higher.
Claim 11
Dependent Claim
29 words
A polarizing film according to Claim 1, wherein a temperature range of the liquid crystal phase of the dichroic substance having liquid crystal properties is 20 °C or higher.
Claim 12
Dependent Claim
179 words
A polarizing film according to Claim 1, wherein the dichroic substance having liquid crystal properties is selected from the compounds represented by the formulae (a) to (g): wherein represents -A- and -B- each represent -CH=N- , - -O- , - =N- , -N=N- , -CH=CH- , -C≡C- , Y- and Z- each represent H-, CH₃(CH₂) m - (where m is an integer equal to 0 to 10), CH₃(CH₂) m O- (where m is an equal to 0 to 10), Cl-, Br-, I-, F-, CHO-, CH₃(CH₂) m COO- (where m is an integer equal to 0 to 10), -CN, -NO₂, -NH₂, -N(R)₂, -N-[(CH₂) m -CH₃]₂ (where m is an integer equal to 0 to 10), (where R represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms); R₁, R₂, R₃ and R₄ each represent H-, CH₃(CH₂) m - (where m is an integer equal to 0 to 10), CH₃(CH₂) m O- (where m is an integer equal to 0 to 10), Cl-, Br-, I-, F- or O₂N-; and n is an interger of 1 to 4.
Claim 13
Dependent Claim
70 words
A polarizing film according to Claim 11, wherein the dichroic substance having liquid crystal properties is selected from the compounds represented by the following formula: Y-(N=N-E) p (N=N-G) q -Z wherein Y and Z each represent a terminal group as defined in Claim 11, E and G each represent a phenylene group or naphthylene group which may be substituted, and p and q each represent integers of 1 to 3.
Claim 14
Dependent Claim
54 words
A polarizing film according to Claim 11, wherein the dichroic substance having liquid crystal properties is selected from the compounds represented by the following formula: Y-N=CH-E-CH=N-Z wherein Y and Z each represent a terminal group as defined in Claim 11, and E represents a phenylene group or a naphthylene group which may be substituted.
Claim 15
Dependent Claim
57 words
A polarizing film according to Claim 11, wherein the dichroic substance having liquid crystal properties is selected from the compounds represented by the following formula: Y-CH=N-G-N=CH-Z wherein Y and Z each represent a terminal group as defined in Claim 11, and G represents a phenylene group, a naphthylene group or a biphenylene group which may be substituted.
References Cited (Backward Citations)
No citation records indexed.
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