Nitto-Denko Corporation

Yuyama Mfg. Co., Ltd.

Masayuki Okamoto

Masahito Niwa

Jun Akiyama

Kiyoe Shigetomi

Masato Yamagata

Yosuke Shimizu

Hiroaki Kishioka

Satoshi Mita

Satoshi Honda

Naofumi Kosaka

Shou Takarada

Ryoko Asai

Naoaki Higuchi

Hiroaki Fumoto

Tetsuro Ikeda

Yoshimi Konno

Taiyan Jiang

Naoki Koike

Masayuki Satake

Hiroyuki Yuyama

Takafumi Imai

Kenichi Okada

Katsunori Yoshina

Mitsuyoshi Shirai

Takahiro Nonaka

Atsushi Takashima

Tomohide Banba

Taiki Shimokuri

Kazuhisa Maeda

Kaori Akamatsu

Kaori Mizobata

Ginji Mizuhara

Hirokazu Chihara

Takashi Kondou

Masanori Uesugi

Yoshihiko Ide

Mika Takashima

An adhesive composition contains at least a polymer and an ionic liquid. The adhesive composition includes components such that when an ionic liquid-free adhesive layer is formed of a composition composed of the components of the adhesive composition that are other than the ionic liquid among components contained in the adhesive composition, the ionic liquid-free adhesive layer has a relative permittivity of 5 or more at a frequency of 100 Hz, after being left to stand in an environment of 22° C. and 20% RH for 3 days.

Adhesive composition, adhesive sheet, and adhered body

Provided is a PSA sheet having a PSA layer. The PSA layer includes a layer A forming at least one surface thereof. The PSA sheet has an adhesive strength N0 of 2.0 N/10 mm or greater, after one day at room temperature following application of the layer A side to a surface of an alkaline float glass plate as an adherend having a contact angle of 5°-10° with distilled water; has an N1 to N0 reduction rate of 30% or lower, wherein N1 is a water-resistant adhesive strength measured after stored at room temperature for one day, immersed in water for 30 minutes, taken out from the water and then residual water is wiped off, and has an N2 to NO reduction rate of 40% or higher, wherein N2 is a water-peel strength measured after stored at room temperature for one day, 20 μL distilled water is dropped onto the adherend and is allowed to enter a PSA layer/adherend interfacial edge. N2 is measured at a tensile speed of 300 mm/min at a peel angle of 180°.

Pressure-sensitive adhesive sheet and method for peeling pressure-sensitive adhesive sheet

Provided is an optical PSA composition that can be easily peeled using an aqueous liquid such as water and has sufficient adhesive strength. An optical PSA composition comprising an acrylic polymer is provided. The PSA composition comprises at least one species of compound A selected among surfactants and compounds having polyoxyalkylene backbones. The monomers forming the acrylic polymer comprises less than 20 wt % alkoxyalkyl (meth)acrylate and less than 20 wt % alkoxypolyalkylene glycol (meth)acrylate. Alternatively, the compound A content is less than 1 part by weight to 100 parts by weight of the acrylic polymer.

Optical pressure-sensitive adhesive composition and use thereof

A polarizing film, wherein transparent protective films are laid, respectively, on/over both surfaces of a polarizer to interpose an adhesive layer (a) and an adhesive layer (b), respectively, between both the surfaces and the transparent protective films. The adhesive layer (a) has a glass transition temperature of &#x2212;60&#xb0; C. or higher and lower than 40&#xb0; C. The adhesive layer (b) has a glass transition temperature of 40&#xb0; C. or higher. The adhesive layer (a) is a layer formed in the form of a cured product layer yielded by radiating an active energy ray to an active-energy-ray-curable adhesive composition (a). The active-energy-ray-curable adhesive composition (a) comprises at least one or more radical polymerizable compounds, and when a total amount of the radical polymerizable compound(s) is defined as 100% by weight, one or more alkyl (meth)acrylates (A) (each) having 10 to 20 carbon atoms are comprised in a proportion of 15% or more by weight.

Polarizing film, method for producing same, optical film, and image display device

A polarizing film, wherein transparent protective films are laid, respectively, on/over both surfaces of a polarizer to interpose an adhesive layer (a) and an adhesive layer (b), respectively, between both surfaces of a polarizer, and transparent protective films. The adhesive layer (a) on/over one of both the surfaces has a glass transition temperature of &#x2212;60&#xb0; C. or higher and lower than 40&#xb0; C. The adhesive layer (b) on/over the other surface has a glass transition temperature of 40&#xb0; C. or higher. The adhesive layer (a) is a layer formed in the form of a cured product layer yielded by radiating an active energy ray to an active-energy-ray-curable adhesive composition (a). The active-energy-ray-curable adhesive composition (a) comprises, as radical polymerizable compounds, a component A having a logPow of &#x2212;2 to 2, and a component B having a logPow more than 7, these logPow values being each an octanol/water distribution coefficient.

Provided is an optical pressure-sensitive adhesive sheet which excels in whitening resistance and high-temperature bonding reliability and exhibits superior bump absorptivity. The optical pressure-sensitive adhesive sheet according to the present invention includes an acrylic pressure-sensitive adhesive layer and has a moisture content of 0.65 percent by weight or more after storage in an environment of 60&#xb0; C. and 95 percent relative humidity for 120 hours, in which the acrylic pressure-sensitive adhesive layer contains an acrylic polymer and has a storage shear modulus at 23&#xb0; C. of from 0.8&#xd7;10to 5.0&#xd7;10Pa, and the acrylic polymer is formed from, as an essential monomer component, a monomer that will form a homopolymer having a glass transition temperature of &#x2212;10&#xb0; C. or higher.

Optical pressure-sensitive adhesive sheet

An acrylic pressure-sensitive adhesive composition for optical use includes: an acrylic polymer (A) that contains, as a monomer unit, a vinyl monomer having a nitrogen atom in its backbone and that does not substantially contain a carboxyl group-containing monomer; and a (meth)acrylic polymer (B) having a weight average molecular weight of 1000 or more and less than 30000.

Acrylic pressure-sensitive adhesive composition for optical use and acrylic pressure-sensitive adhesive tape for optical use

An acrylic pressure-sensitive adhesive composition contains 100 parts by mass of an acrylic polymer (A), 1 to 70 parts by mass of a (meth)acrylic polymer (B) having a weight average molecular weight (Mw) of 1000&#x2266;Mw&#x3c;30000, and 1 to 50 parts by mass of a hydrogenated tackifying resin (C). The (meth)acrylic polymer (B) is a polymer having a weight average molecular weight smaller than that of the acrylic polymer (A) as a pressure-sensitive adhesive composition, and functions as a tackifying resin along with the hydrogenated tackifying resin (C).

Acrylic pressure-sensitive adhesive composition, acrylic pressure-sensitive adhesive layer, and acrylic pressure-sensitive adhesive tape

The present invention provides an optical-use pressure-sensitive adhesive sheet, which includes a pressure-sensitive adhesive layer containing a polymer formed of one or more monomer ingredients containing, as an indispensable monomer ingredient, a monomer of which homopolymer has a glass transition temperature of not lower than &#x2212;10&#xb0; C., said sheet having a moisture content of at least 0.65% by weight after stored in an environment at 60&#xb0; C. and 95% RH for 120 hours. The pressure-sensitive adhesive layer is preferably an acrylic pressure-sensitive adhesive layer.

Optical-use pressure-sensitive adhesive sheet

The present invention relates to an optical acrylic pressure-sensitive adhesive composition, containing: 100 parts by mass of an acrylic polymer (A) which contains a vinylic monomer having a nitrogen atom in a skeleton thereof as a monomer unit and does not substantially contain a monomer containing a carboxyl group; 1-70 parts by mass of a (meth)acrylic polymer (B) having a weight average molecular weight of 1,000 or greater and less than 30,000; and 1-50 parts by mass of a hydrogenated tackifying resin (C), and an optical acrylic pressure-sensitive adhesive tape including a pressure-sensitive adhesive layer containing the optical acrylic pressure-sensitive adhesive composition.

Optical acrylic pressure-sensitive adhesive composition and optical acrylic pressure-sensitive adhesive tape

The present invention relates to a pressure-sensitive adhesive composition including, as a main ingredient, a monomer mixture or an acrylic copolymer material obtained by at least partially polymerizing the monomer mixture, the monomer mixture including: at least one monomer (monomer m1) selected from alkyl (meth)acrylates represented by the following formula (I) CH&#x2550;C(R)COORin which Ris a hydrogen atom or a methyl group, and Ris an alkyl group having 1 to 20 carbon atoms: at least one monomer (monomer m2) selected from N-hydroxyalkyl(meth)acrylamides represented by the following formula (II) CH&#x2550;C(R)CONHRin which Ris a hydrogen atom or a methyl group, and Ris a hydroxyalkyl group having 2 to 4 carbon atoms: and at least one monomer (monomer m3) selected from N-vinyl cyclic amides and (meth)acrylamides that may have an N-alkyl group; and the monomer mixture including substantially no carboxyl group-containing monomer.

Pressure-sensitive adhesive composition, pressure-sensitive adhesive sheet, and method for producing the same

The present invention relates to a pressure-sensitive adhesive composition used for a pressure-sensitive adhesive sheet to be directly attached to a metal surface, the composition including, a monomer mixture or an acrylic copolymer material obtained by at least partially polymerizing the monomer mixture, the monomer mixture including: at least one monomer (monomer m1) selected from alkyl(meth)acrylates represented by the following formula (I): CH&#x2550;C(R)COORin which Ris a hydrogen atom or a methyl group, and Ris an alkyl group having 1 to 20 carbon atoms, and N-methylol (meth)acrylamide (monomer m2); in which the monomer m1 and the monomer m2 are contained in a total amount of 60% by weight or more based on the total amount of the monomer mixture, and the monomer mixture includes substantially no carboxyl group-containing monomer.

Pressure-sensitive adhesive composition and use thereof

Provided is an adhesive method of pressure-sensitive adhesive sheet for vehicle coatings, giving a pressure-sensitive adhesive sheet highly adhesive even to a coating surface easily causing the low adhesion by bleed-out of leveling agent or the like. The adhesive method of pressure-sensitive adhesive sheet for vehicle coatings according to the present invention is characterized in that the difference (absolute value) between the solubility parameter (SP value) of a pressure-sensitive adhesive layer (X) formed on the side of the pressure-sensitive adhesive sheet in contact with the vehicle coating and the solubility parameter (SP value) of the surface control agent contained in the vehicle coating is 0.6 (cal/cm)or less.

Adhesive method of pressure-sensitive adhesive sheet for vehicle coatings

A tablet filling device for supplying a vial container of desired size certainly with no mistake comprising a plurality of containing means containing vial containers by size, a means for taking out a vial container from the containing means based on prescription data, means for carrying a vial container taken out by the container take out means, a means for providing a table to a vial container carried by the carrying means, a means for collecting a vial container in the middle of carriage by the carrying means, a means provided on the carrying passage of the carrying means and detecting the size of a carried vial container, and a control means for judging whether the size of a vial container selected based on the prescription data matches the size of a vial container detected by the container size detection means and collecting the carried vial container by the container collection means if they do not match each other.

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Ibaraki, Japan

Masayuki Okamoto