Nitto-Denko Corporation

Toshitsugu Hosokawa

Shinichi Inoue

Masayuki Satake

Yuusuke Toyama

Mizue Nagata

Akiko Ogasawara

Toshitaka Takahashi

Yousuke Makihata

Takaaki Ishii

Kenichi Okada

Yoshihiro Hieda

Kazuhiko Miyauchi

Taiki Shimokuri

Tadaaki Harada

Kunihiro Inui

Takashi Shimizu

Yutaka Moroishi

Fumiko Nakano

Yukiko Azumi

Fumiaki Shirafuji

Yuuichi Morimoto

Minoru Miyatake

Satoru Yamamoto

Shusaku Goto

Takeharu Kitagawa

Koichi Hashimoto

Takashi Kamijo

Tomohiro Mori

Sadahito Misumi

Takashi Taniguchi

Akihisa Murata

Kazuhiro Ikemura

Tsutomu Nishioka

Takeshi Yamanaka

Akiko Tanaka

Akira Ootani

Aimi Matsuura

Kayo Shimokawa

Shinichi Ohizumi

Yuzo Akada

Mizuho Nagata

Hiraku Yamamoto

Hideaki Taki

Minoru Yamane

Keiichi Okamoto

Katsuhito Kamiya

A pressure-sensitive adhesive composition for an optical film, includes a (meth)acryl-based polymer obtained by polymerization of a monomer component including, as a main component, an alkyl (meth)acrylate having an alkyl group of 4 to 18 carbon atoms; and a phosphate ester compound. The pressure-sensitive adhesive composition is capable of forming a pressure-sensitive adhesive layer for optical films. The pressure-sensitive adhesive layer that is for use on optical films and makes it possible to suppress an increase in the surface resistance of a transparent conductive layer even when a laminate including a transparent conductive layer and an optical film such as a polarizing plate with the pressure-sensitive adhesive layer interposed therebetween is stored under hot and humid conditions.

Pressure-sensitive adhesive composition for optical film, pressure-sensitive adhesive layer for optical film, pressure-sensitive adhesive layer-attached optical film, liquid crystal display device, and laminate

An aqueous dispersion-type pressure-sensitive adhesive composition for an optical film includes a emulsion particles of a core-shell structure, wherein the emulsion particles include a (meth)acryl-based copolymer (A) having a glass transition temperature of &#x2212;55&#xb0; C. to 0&#xb0; C. and a (meth)acryl-based copolymer (B) having a glass transition temperature of 0&#xb0; C. to 180&#xb0; C., in a single emulsion particle, one of the copolymers (A) and (B) forms a core layer, and another forms a shell layer, at least one of the copolymers (A) and (B) contains a carboxyl group-containing monomer, a difference of the glass transition temperatures between the copolymers (A) and (B) is 50&#xb0; C. or more, and a ratio (A)/(B) (by weight) is in the range of 50/50 to 90/10.

Pressure-sensitive adhesive composition for optical film, pressure-sensitive adhesive layer for optical film, pressure-sensitive adhesive optical film, and image display device

The invention is a method, an apparatus, and a coated product-manufacturing method each capable of applying a coating solution to a flexible backing sheet using a die coater while preventing contaminants from forming defects. A virtual line L is drawn to pass through the discharge portof the die coaterand to extend perpendicular to the backing sheet, the distance Dbetween a starting line Pand a boundary line Pis 50 mm or less, and the distance between the starting line Pand a line on the roller Pis 5 &#x3bc;m or more.

Method and apparatus for applying coating solution, and method for manufacturing coated product

The present invention aims at providing an antistatic pressure-sensitive adhesive optical film exhibiting excellent antistatic effect, optical properties, and water resistance and having excellent adhesion between the antistatic layer and the pressure-sensitive adhesive layer. An antistatic pressure-sensitive adhesive optical film, the optical film having an antistatic layer laminated on at least one side of the optical film, and a pressure-sensitive adhesive layer further laminated on the antistatic layer, wherein the antistatic layer comprises a conductive polymer and a sulfonic acid compound as raw material components, and the pressure-sensitive adhesive layer is formed of an acryl-based pressure-sensitive adhesive containing nitrogen.

Antistatic adhesive optical film and image display

An object of the present invention is to provide a method for manufacturing an optical film-forming pressure-sensitive adhesive layer, which can reduce the problem with visibility without a reduction in productivity, such as a reduction in coating speed. A method for manufacturing an optical film-forming pressure-sensitive adhesive layer, comprising the steps of: (1) applying, to a release film, an aqueous dispersion-type pressure-sensitive adhesive including an aqueous dispersion containing a (meth)acryl-based polymer in the form of an aqueous dispersion; and (2) drying the applied aqueous dispersion-type pressure-sensitive adhesive, wherein the aqueous dispersion-type pressure-sensitive adhesive has a viscosity of 0.01 Pa&#xb7;s to 0.1 Pa&#xb7;s at a shear rate of 4,000 (l/s), the optical film-forming pressure-sensitive adhesive layer formed on the release film has a surface roughness (Ra) of 10 nm to 40 nm, and the optical film-forming pressure-sensitive adhesive layer has a haze of 1% or less.

Method for manufacturing optical film-forming pressure-sensitive adhesive layer, optical film-forming pressure-sensitive adhesive layer, pressure-sensitive adhesive-type optical film, and image display device

A pressure-sensitive adhesive layer for an optical film made from an aqueous dispersion-type pressure-sensitive adhesive composition, wherein the aqueous dispersion-type pressure-sensitive adhesive composition is an aqueous dispersion comprising a water-dispersible (meth)acryl-based copolymer (A) having a glass transition temperature from &#x2212;55&#xb0; C. to less than 0&#xb0; C.; and a water-soluble or water-dispersible component (B) having a glass transition temperature of 0&#xb0; C. or more, a mixture ratio (A)/(B) is in the range of 50-97/3-50, the component (B) forms domains with maximum lengths between 1 nm and 200 nm in a resin component made of the (meth)acryl-based copolymer (A), and the pressure-sensitive adhesive layer has a haze value (H20) of 1% or less when having a thickness of 20 &#x3bc;m. The pressure-sensitive adhesive layer for an optical film, which is made from an aqueous dispersion-type pressure-sensitive adhesive composition has good reworkability or recyclability, and has a sufficient level of durability.

Adhesive layer for optical film, optical film having adhesive layer, image display device, and detachment method for optical film

A pressure-sensitive adhesive optical film of the present invention comprises an optical film; and a pressure-sensitive adhesive layer laminated on at least one side of the optical film, wherein the pressure-sensitive adhesive layer is formed from an acrylic pressure-sensitive adhesive comprising a (meth)acrylic polymer comprising 30 to 99.99% by weight of an alkyl(meth)acrylate monomer unit and 0.01 to 15% by weight of a functional group-containing monomer unit, and the (meth)acrylic polymer in the acrylic pressure-sensitive adhesive is crosslinked by electron beam irradiation. The pressure-sensitive adhesive optical film has a high level of reworkability, durability and workability.

Pressure-sensitive adhesive optical film, production method thereof, and image display

A pressure-sensitive adhesive composition for an optical film of the present invention comprises 100 parts by weight of a (meth)acrylic polymer comprising 45 to 99.99% by weight of an alkyl (meth)acrylate monomer unit and 0.01 to 2% by weight of a tertiary amino group-containing monomer unit; and 0.01 to 2 parts by weight of a peroxide as a crosslinking agent. The pressure-sensitive adhesive composition can form an pressure-sensitive adhesive layer that has satisfactory reworkability such that optical films can be easily peeled from liquid crystal panels with no adhesive residue and also has satisfactory processability such that it can be worked without pressure-sensitive adhesive fouling or dropout.

Pressure-sensitive adhesive composition for optical film, pressure-sensitive adhesive layer for optical film, production method thereof, pressure-sensitive adhesive optical film and image display

An antistatic optical film comprising an antistatic layer laminated on at least one side of an optical film, wherein the antistatic layer comprises a water soluble or a water dispersible conductive polymer, has excellent antistatic effect, optical characteristics and appearance.

Antistatic optical film, method for manufacturing the same and image viewing display

A pressure-sensitive adhesive layer for optical films. The pressure-sensitive adhesive layer can prevent light leakage caused by stress associated with dimensional change of a component such as an optical film, that has reworkability, and that has satisfactory processability. A pressure-sensitive adhesive optical film produced using the layer is also provided. The pressure-sensitive adhesive layer is prepared with the use of a composition which includes a (meth)acrylic polymer including (a) 34 to 94% by weight of an alkyl (meth)acrylate monomer unit, (b) 5 to 50% by weight of an aromatic ring-containing (meth)acrylate monomer unit, and (c) 0.01 to 0.5% by weight of an amino group-containing (meth)acrylate monomer unit; 0.01 to 2 parts by weight of a peroxide as a crosslinking agent; and 0.01 to 2 parts by weight of a silane coupling agent based on 100 parts by weight of the (meth)acrylic polymer.

Pressure-sensitive adhesive composition for optical films, pressure-sensitive adhesive optical film and image display

There is provided a pressure-sensitive adhesive composition for optical films. The composition can form a pressure-sensitive adhesive layer that can prevent light leakage caused by stress associated with dimensional change of a component such as an optical film, which include the pressure-sensitive adhesive layer that has reworkability such that it can be easily peeled from a component, and that has satisfactory processability such that it can be processed without pressure-sensitive adhesive stain or dropout, after it is formed on an optical film. A pressure-sensitive adhesive optical film produced using the composition is also provided. The pressure-sensitive adhesive composition includes a (meth)acrylic polymer including (a) 34 to 94% by weight of an alkyl (meth)acrylate monomer unit, (b) 5 to 35% by weight of an aromatic ring-containing (meth)acrylate monomer unit, and (c) 0.01 to 0.5% by weight of an amino group-containing (meth)acrylate monomer unit and further including (d) 0.05 to 3% by weight of a carboxyl group-containing (meth)acrylate monomer unit and/or (e) 0.05 to 2% by weight of a hydroxyl group-containing (meth)acrylate monomer unit and having a weight average molecular weight of 1,600,000 to 3,000,000 as determined by gel permeation chromatography; crosslinking agents including 0.01 to 5 parts by weight of an isocyanate crosslinking agent and 0.01 to 2 parts by weight of a silane coupling agent based on 100 parts by weight of the (meth)acrylic polymer.

The present invention aims at providing an antistatic optical film having excellent antistatic effect and high light transmittance, wherein an antistatic layer laminated on at least one side of the optical film. An antistatic optical film having an antistatic layer laminated on at least one side of the optical film, wherein rubbing treatment is performed on a surface of the optical film on which the antistatic layer is laminated, and a conductive polymer in the antistatic layer is aligned.

Charge-preventing optical film, charge-preventing adhesive optical film, manufacturing method thereof, and image display device

An object of the invention is to provide a pressure-sensitive adhesive optical film-peeling method capable of easily detaching the pressure-sensitive adhesive optical film from a glass substrate with no damage to the glass substrate or no adhesive deposit on the glass substrate, and to provide a pressure-sensitive adhesive optical film suitable for use in such a peeling method. The invention is directed to a method for peeling a pressure-sensitive adhesive optical film from an optical film-carrying glass substrate including a glass substrate and the pressure-sensitive adhesive optical film bonded thereto, which includes: exposing the optical film-carrying glass substrate to an environment at a temperature of 40 to 98&#xb0; C. and a relative humidity of 60 to 99% for three minutes or more; and then peeling the pressure-sensitive adhesive optical film from the glass substrate under the environment.

Method for peeling pressure-sensitive adhesive optical film, and pressure-sensitive adhesive optical film

There is provided a method for separating an optical film bonded to an adherend with a pressure-sensitive adhesive layer interposed therebetween from the adherend. The pressure-sensitive adhesive layer is formed using an optical pressure-sensitive adhesive. The optical pressure-sensitive adhesive of the invention comprises a base polymer having a functional group (F); and a coupling agent that has a benzyl ester group and is represented by Formula (1): wherein Aand Aare different functional groups, one of Aand Ashows reactivity or interaction with the functional group (F) of the base polymer, Ris an optionally substituted alkylene group of 1 to 12 carbon atoms and/or an optionally substituted phenylene group, and Rand Rare each a hydrogen atom or an alkyl group of 1 to 12 carbon atoms and may be the same or different.

Method for separating an optical film bonded to an adherend with a pressure-sensitive adhesive optical film

An optical pressure-sensitive adhesive of the invention comprises a base polymer having a functional group (F); and a coupling agent that has a benzyl ester group and is represented by Formula (1): wherein Aand Aare different functional groups, one of Aand Ashows reactivity or interaction with the functional group (F) of the base polymer, Ris an optionally substituted alkylene group of 1 to 12 carbon atoms and/or an optionally substituted phenylene group, and Rand Rare each a hydrogen atom or an alkyl group of 1 to 12 carbon atoms and may be the same or different. The pressure-sensitive adhesive is use in pressure-sensitive adhesive optical films and so on that is excellent in terms of both durability and release property.

Optical pressure-sensitive adhesive, pressure-sensitive adhesive optical film, image display, and method for separating pressure-sensitive adhesive optical film

Growing community of inventors

Ibaraki, Japan

Toshitsugu Hosokawa