Coating Composition, Optical Film, Anti-reflection Film, Polarizing Plate, and Display Unit Using Them

• US 20070289497A1
• Filed: 09/26/2005
• Published: 12/20/2007
• Est. Priority Date: 09/27/2004
• Status: Active Grant

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: Suzuki, Takato
• Granted Patent: US 7,906,207 B2
• Time in Patent Office: Days
• US Class Current: 106/287.240
• CPC Class Codes: C08F 216/14 Monomers containing only one unsaturated aliphatic radical
• CPC Class Codes: C08F 222/103 of trialcohols, e.g. trimethylolpropane tri(meth)acrylate
• CPC Class Codes: C09D 133/16 Homopolymers or copolymers of esters containing halogen atoms
• CPC Class Codes: G02B 1/111 using layers comprising organic materials
• CPC Class Codes: G02B 5/30 Polarising elements light-modulating devices with active elements G02F1/00
• CPC Class Codes: Y10T 428/261 In terms of molecular thickness or light wave length

Abstract

A coating composition comprises: a fluoro-aliphatic group-containing copolymer comprising a repeating unit A corresponding to a fluoro-aliphatic group-containing monomer, and a repeating unit B corresponding to at least one monomer, wherein each of the I/O values of said at least one monomer constituting the repeating unit B is 1.0 or less.

Claims

1. A coating composition comprising:

a fluoro-aliphatic group-containing copolymer comprising a repeating unit A corresponding to a fluoro-aliphatic group-containing monomer, and a repeating unit B corresponding to at least one monomer, wherein each of the I/O value(s) of said at least one monomer constituting the repeating unit B is 1.0 or less.

2. The coating composition as claimed in claim 1,

wherein the fluoro-aliphatic group-containing copolymer comprises:

(i) a repeating unit corresponding to a fluoro-aliphatic group-containing monomer represented by the following formula (1);

wherein R₁ represents a hydrogen atom or a methyl group;

X represents an oxygen atom, a sulfur atom or —

N(R₂)—

;

m represents an integer of from 1 to 6;

n represents an integer of from 1 to 3; and

R₂ represents a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms; and

(ii) a repeating unit corresponding to a monomer represented by the following formula (2);

wherein R₃ represents a hydrogen atom or a methyl group;

Y represents a divalent linking group; and

R₄ represents a straight chain, branched or cyclic alkyl group having from 1 to 20 carbon atoms.

3. The coating composition as claimed in claim 1,

wherein the fluoro-aliphatic group-containing copolymer comprises:

(i) a repeating unit corresponding to a fluoro-aliphatic group-containing monomer represented by the following formula (3);

wherein R⁰ represents a hydrogen atom, a halogen atom, or a methyl group;

L represents a divalent linking group; and

n represents an integer of from 1 to 18; and

(ii) a repeating unit corresponding to a monomer represented by the following formula (2).

wherein R₃ represents a hydrogen atom or a methyl group;

Y represents a divalent linking group; and

R₄ represents a straight chain, branched or cyclic alkyl group having from 1 to 20 carbon atoms.

4. The coating composition as claimed in claim 1,

wherein the fluoro-aliphatic group-containing copolymer comprises:

(i) a repeating unit corresponding to a fluoro-aliphatic group-containing monomer represented by the following formula (4);

wherein R¹ represents a hydrogen atom, a halogen atom, or a methyl group;

X represents an oxygen atom, a sulfur atom or —

N(R²)—

;

m represents an integer of from 1 to 6;

n represents an integer of from 1 to 18; and

R² represents a hydrogen atom or an alkyl group having from 1 to 8 carbon atoms which may have a substituent; and

(ii) a repeating unit corresponding to a monomer represented by the following formula (2).

wherein R₃ represents a hydrogen atom or a methyl group;

Y represents a divalent linking group; and

R₄ represents a straight chain, branched or cyclic alkyl group having from 1 to 20 carbon atoms.

5. The coating composition as claimed in claim 1,

wherein the fluoro-aliphatic group-containing copolymer comprises:

(i) a repeating unit corresponding to a fluoro-aliphatic group-containing monomer represented by the following general formula [5];

wherein, R₂ represents a hydrogen atom, halogen atom or methyl group, L₂ represents a divalent connecting group, and n represents an integer of from 1 to 6; and

(ii) a repeating unit corresponding to a monomer represented by the following formula (2).

wherein R₃ represents a hydrogen atom or a methyl group;

Y represents a divalent linking group; and

R₄ represents a straight chain, branched or cyclic alkyl group having from 1 to 20 carbon atoms.

6. An optical film comprising, on a transparent support, at least one layer formed by the coating composition set forth in claims 1 whereby said layer is formed by coating at a coating speed of 25 m/min or more.

7. An anti-reflection film which is the optical film as claimed in claim 6, the optical film having an anti-reflection property.

8. A polarizing plate comprising a polarizing film, wherein the anti-reflection film as claimed in claim 7 is used on at least one side of the polarizing film.

9. A polarizing plate comprising a polarizing film, wherein the anti-reflection film as claimed in claim 7 is used as a protective film of one side of the polarizing film, and an optical compensating film having optical anisotropy is used as a protective film of the other side of the polarizing film.

10. An image display apparatus comprising the anti-reflection film as claimed in claim 7.

11. An image display apparatus comprising the polarizing plate claimed in claim 8.

12. An image display apparatus comprising the polarizing plate claimed in claim 9.