Back to results
US 10,012,770 B2Granted
Optical film, method of manufacturing the same, polarizing plate and liquid crystal display device
AssigneeFUJIFILM Corporation
InventorsKenichi Fukuda, Miho Asahi, Yutaka Nozoe
Life of this patent
Estimating the term…
Abstract
There is provided an optical film comprising a layer formed on a base film by curing a curable composition containing the specific component (A) in an amount of 50 to 99% by mass and the specific component (B) in an amount of 1 to 50% by mass, based on the total solid content of the curable composition when the total solid content of the curable composition is set to 100% by mass.
Claims10
An optical film comprising:
- a base film formed from a cellulose acylate or a (meth)acrylic polymer having at least one of a lactone ring structure, an anhydrous glutaric acid ring structure and a glutarimide ring structure in its main chain, and
- a layer formed on the base film by curing a curable composition containing the following (A) in an amount of 50 to 99% by mass and the following (B) in an amount of 1 to 50% by mass, based on the total solid content of the curable composition when the total solid content of the curable composition is set to 100% by mass:
- (A) at least one of a compound having a cycloaliphatic hydrocarbon group and an ethylenically unsaturated double bond and a compound having a fluorene ring and an ethylenically unsaturated double bond, and
- (B) a rosin compound which has an acid number from 280 to 400 mgKOH/g,
- wherein when the layer containing (A) and (B) has a film thickness of 10 μm, a converted moisture permeability of the layer containing (A) and (B) ranges from 5.0 to 100 g/m2/day,
- the moisture permeability is a value obtained according to a method described in JIS Z-0208 after the lapse of 24 hours under a temperature of 40 ° C. and a relative humidity of 90%, the moisture permeability of the layer containing (A) and (B) and having a film thickness of 10 pm is calculated by the following Equation (2):
- Jb×db/10 Equation (2)
- in Equation (2),
- Jb represents the moisture permeability of the layer when the optical film is separated into the base film and the layer containing (A) and (B), and
- db [μm] is a film thickness of the low moisture-permeable layer.
7 more elements
A method of manufacturing an optical film, comprising:
- forming a base film from a cellulose acylate or a (meth)acrylic polymer having at least one of a lactone ring structure, an anhydrous glutaric acid ring structure and a glutarimide ring structure in its main chain, and
- forming a layer on the base film by curing a curable composition containing the following (A) and (B):
- (A) at least one of a compound having a cycloaliphatic hydrocarbon and an ethylenically unsaturated double bond and a compound having a fluorene ring and an ethylenically unsaturated double bond in an amount of 50 to 99% by mass, based on the total solid content of the curable composition when the total solid content of the curable composition is set to 100% by mass,
- (B) a rosin compound having an acid number from 280 to 400 mgKOH/g, in an amount of 1 to 50% by mass, based on the total solid content of the curable composition,
- wherein when the layer containing (A) and (B) has a film thickness of 10 μm, a converted moisture permeability of the layer containing (A) and (B) ranges from 5.0 to 100 g/m2/day,
- the moisture permeability is a value obtained according to a method described in JIS Z-0208 after the lapse of 24 hours under a temperature of 40 ° C. and a relative humidity of 90%, the moisture permeability of the layer containing (A) and (B) and having a film thickness of 10 pm is calculated by the following Equation (2):
- Jb×db/10 Equation (2)
- in Equation (2),
- Jb represents the moisture permeability of the layer when the optical film is separated into the base film and the layer containing (A) and (B), and
- db [μm] is a film thickness of the low moisture-permeable layer.
7 more elements
Dependencies are inferred from the claim text.