Nitto-denko Corporation

Shigeki Muta

Takao Yoshikawa

Masahiro Ohura

Masahiro Oura

Hitoshi Takahira

Masatoshi Suzuki

Kazuyuki Kitakura

Kazuhito Hosokawa

Shinji Inokuchi

Masatomi Harada

Kosuke Morita

Tetsuya Hirose

Kiichiro Matsushita

Naoyuki Nishiyama

Takafumi Hida

Ryuuichi Kabutoya

Shuuhei Yamamoto

Kazumasa Tanaka

The present invention provides a sealing sheet containing a flame retardant adhesive sheet having a flame retardant-containing adhesive layer, wherein the flame retardant-containing adhesive layer has a void content of 5-40%.

Sealing sheet

The present invention relates to a moisture-proof material having a polyurethane film substrate and an adhesive layer formed on at least one surface of the substrate, which material shows a tensile strength of not less than 7500 psi, and an elongation at break of not less than 550%.

Moisture-proof material

The present invention provides a double-sided pressure-sensitive adhesive tape or sheet including a bubble-containing pressure-sensitive adhesive layer; and a releasable liner protecting a pressure-sensitive adhesive surface of the bubble-containing pressure-sensitive adhesive layer, said releasable liner comprising at least a releasably treated layer formed by an ionizing radiation-curable silicone type releasing agent, in which the releasably treated layer formed by the ionizing radiation-curable silicone type releasing agent is employed onto a pressure-sensitive adhesive surface on the heavier releasable side. The double-sided pressure-sensitive adhesive tape or sheet may employ a bubble-containing pressure-sensitive adhesive layer formed by a bubble-containing pressure-sensitive adhesive composition in the form in which a gas component is mixed in a pressure-sensitive adhesive composition.

Double-sided pressure-sensitive adhesive tape or sheet

Adhesive sheets using an acrylic pressure-sensitive flame-retardant adhesive having excellent properties such as adhesive force and holding power at high temperature and also having a self fire-extinguishing property which instantaneously extinguishes fire, i.e., a flame-retardance, are provided. A photopolymerizable composition comprising a) 100 parts by weight of a monomer (or the oligomer thereof) comprising 70 to 100% by weight of a (meth)acrylic acid alkyl ester having on the average a carbon number of 2 to 14 in the alkyl group and 30 to 0% by weight of a monoethylenically unsaturated monomer copolymerizable with the ester, b) 0.02 to 5 parts by weight of a polyfunctional (meth)acrylate as a crosslinking agent, c) 0.01 to 5 parts by weight of a photopolymerization initiator, and d) 10 to 180 parts by weight of a flame retardant having a melting point of at least 60&deg; C. is prepared, a pressure-sensitive flame-retardant adhesive is prepared from the photopolymerized product of the composition, and the adhesive is formed on one or both surfaces of a substrate.

Photopolymerizable composition, pressure-sensitive flame-retardant adhesive, and adhesive sheets

An adhesive sheet (,) in which heat-conductive and pressure-sensitive adhesive layers (,) which comprise a) a copolymer of a monomer mixture containing main monomers comprising as main component an alkyl (meth)acrylate carrying an alkyl group having from 2 to 14 carbon atoms on average and from 1 to 30% by weight, based on the above main monomers, of a polar monomer having a glass transition point, as a homo-polymer, of &deg; C. or lower; and b) from 10 to 300 parts by weight, per 100 parts by weight of the copolymer, of a heat-conductive filler are formed on both surfaces of a heat-conductive base material (,) is inserted between an electronic part (,) and a heat-radiating member (,) to thereby adhere and fix the heat-radiating member (,) to the electronic part (,) while providing a high heat-conductivity with the heat-conductive and pressure-sensitive adhesive layers (,).

Thermally conductive pressure-sensitive adhesive and adhesive sheet containing the same

A peelable heat-conductive and pressure-sensitive adhesive is disclosed, which comprises: (a) 100 parts by weight of a polymer produced from a monomer mixture comprising from 70 to 100% by weight of one or more alkyl (meth)acrylates in which the alkyl groups on the average have 2 to 14 carbon atoms and from 0 to 30% by weight of one or more monoethylenic monomers copolymerizable therewith, each based on the amount of the monomer mixture; (b) from 20 to 400 parts by weight of a plasticizer having a boiling point of 150&deg; C. or higher; and (c) from 10 to 1,000 parts by weight of a heat-conductive filler. Also disclosed is an adhesive sheet comprising a substrate and, formed on one or each side thereof, a layer of the adhesive. The pressure-sensitive adhesive can exhibit tight adhesion during use and easy peeling after use.

Peelable heat-conductive and pressure-sensitive adhesive and adhesive sheet containing the same

Pressure-sensitive adhesive having excellent heat resistance and heat

Pressure-sensitive adhesive of (meth)acrylate, unsaturated acid,

Thermally conductive pressure-sensitive adhesive, adhesive sheet

Heat-conductive and pressure-sensitive adhesive sheets which are excellent in heat resistance, scarcely undergo anchoring fracture between the base material and the adhesive layer and, therefore, are usable in fixing electronic parts to heat-radiating members or fixing members in various fields including constructive materials, vehicles, aircrafts and ships. the heat-conductive and pressure-sensitive adhesive sheets are in the form of sheets, tapes, etc. wherein a layer of a heat-conductive and pressure-sensitive adhesive composition, which contains an alkyl (meth)acrylate polymer having hydrophilic groups, is formed on the high frequency sputter-etched surface(s) of a plastic film containing 2 to 50% by volume of a heat-conductive, electrical insulating filler.

Heat-conductive and pressure-sensitive adhesive sheets and method for

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Ibaraki, Japan

Shigeki Muta