Coating composition, optical film, anti-reflection film, polarizing plate, and display unit using them

• US 7,906,207 B2
• Filed: 09/26/2005
• Issued: 03/15/2011
• 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
• Primary Examiner(s): Mulcahy; Peter D.
• Assistant Examiner(s): HU, HENRY S
• Application Number:
  US11/659,591
• Publication Number:
  US 20070289497A1
• Time in Patent Office: 1,996 Days
• Field of Search: 428/333, 427/240, 526/245, 106/287.24
• US Class Current: 428/333
• 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. An optical film comprising, on a transparent support, at least one layer formed by 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 inorganic nature/organic nature (I/O) value(s) of said at least one monomer constituting the repeating unit B is 1.0 or less, whereby said layer is formed by coating at a coating speed of 25 m/min or more,

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) or (5);

2. An anti-reflection film which is the optical film as claimed in claim 1, the optical film having an anti-reflection property.

3. An image display apparatus comprising the anti-reflection film as claimed in claim 2.

4. An anti-reflection film which is the optical film as claimed in claim 1, wherein the coating composition comprises 0.001 to 5.0 mass % of the fluoro-aliphatic group-containing copolymer.

5. An optical film comprising, on a transparent support, at least one layer formed by 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 inorganic nature/organic nature (I/O) value(s) of said at least one monomer constituting the repeating unit B is 1.0 or less, whereby said layer is formed by coating at a coating speed of 25 m/min or more,

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) or (4);

6. The optical film as claimed in claim 5, wherein the coating composition comprises 0.001 to 5.0 mass % of the fluoro-aliphatic group-containing copolymer.

7. An anti-reflection film which is the optical film as claimed in claim 5, 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 anti-reflection film as claimed in claim 8.

12. An image display apparatus comprising the anti-reflection film as claimed in claim 9.