Tomoegawa Paper Co., Inc.

Yukinori Sakumoto

Atsushi Koshimura

Takeshi Hashimoto

Takeshi Nishigaya

Masaharu Kobayashi

Fumiyoshi Yamanashi

Katsuji Nakaba

Shigeyuki Yokoyama

Akihiro Shibuya

Chikara Murata

Kazuya Ohishi

Yasuhiro Matsunaga

Takeshi Shima

Kazuhiro Yamasaki

Masaki Tsushima

Toshio Tagami

Shinichi Takahashi

Nobuyuki Nakayama

Fuminori Aikawa

Hiroshi Matsushita

The present invention provides an anti-reflection material and a polarizing film which can exhibit excellent anti-reflection properties and can obtain a visible image without glittering and without reducing an image contrast while exhibiting an excellent wear resistance and chemical resistance, as well as, exhibiting an excellent stain resistance. A surface-roughened layer (,) is provided on one surface or double surfaces of a transparent substrate (,) directly or via another layer, and the surface-roughened layer (,) comprises an ultraviolet-curing resin comprising at least an epoxy compound and a photo-cationic polymerization initiator.

Anti-reflection material and method for producing the same

The invention provides an antiglare material which exhibits excellent antiglare property by preventing shining of external light in a display and is suitable for display of vivid and high-definition images free of any glare, and a polarizing film using the same. The antiglare material includes a transparent substrate provided with a roughened surface layer on one or both sides thereof. The roughened surface layer is formed from an ultraviolet curing resin containing at least an epoxy compound and a photo-cationic polymerization initiator, and beads of a crosslinked acrylic resin. The polarizing film is constructed by laminating a first protective material, which is provided with a roughened surface layer formed from an ultraviolet curing resin containing at least an epoxy compound and a photo-cationic polymerization initiator, and beads of a crosslinked acrylic resin on one side thereof, on one side of a polarizing substrate, and laminating a second protective material on the other side of the polarizing substrate. The crosslinked acrylic resin beads include at least 60 wt. % of particles having a particle size ranging from 0.5 to 6.0 .mu.m and less than 20 wt. % of particles having a particle size greater than 6.0 .mu.m. The HAZE values of the transparent substrate and first protective material fall within a range of 3-30.

Antiglare material and polarizing film using the same

An adhesive tape for electronic parts, comprising

Adhesive tapes

An antiglare material capable of exhibiting an excellent antiglare effect by preventing imaging reflection of an external light source and suitable for an image display with sharpness and high resolution as well as a polarizing film by utilizing the same. The antiglare material of the invention is a transparent substrate of which at least one of the surfaces is roughened to a predetermined surface roughness. The polarizing film of the invention is a laminate consisting of a first protective layer which is the above defined antiglare material and a second protective layer laminated onto the unroughened surface of the first protective layer with intervention of a polarizing substrate. The roughened surface of the transparent substrate in the above mentioned antiglare material, which may be used in the above described polarizing film, preferably has a haze value in the range from 1 to 25 according to JIS K7105 and the transparent substrate is preferably a transparent film.

Antiglare material and polarizing film by using the same

An adhesive tape for electronic parts, comprising (a) a heat resistant base film, and (b) an adhesive layer laminated on at least one surface of said base film, said adhesive layer comprising

Adhesive tapes which can be adhered and cured at a relatively low temperature, keeps enough electric insulation in case of adhering to the leadframe of semiconductor devices. The adhesive tape comprises a releasing film and an adhesive layer provided on a surface of said releasing film, said adhesive layer being semi-cured into a B-stage and composed of:

Adhesive tape for electronic parts and liquid adhesive

This invention is to provide a liquid adhesive of the present invention can be adhered and cured at a relatively low temperature and have sufficient heat resistance and reliability, etc., and an adhesive tape using the same. The liquid adhesive of this invention is obtainable by dissolving (a) a piperazinylethylaminocarbonyl-containing butadiene-acrylonitrile copolymer having a weight average molecular weight of 10,000-200,000, an acrylonitrile content of 5-50% by weight, and an amino equivalent of 500-10,000, represented by the following formula (I): ##STR1## wherein, k, m, and n are molar ratios and taking n as 1, k is a number of 3-175, and m is a number of 0.3 to 93; and (b) a compound having at least two maleimide groups, the ratio of component (b) based on 100 parts by weight of component (a) being in the range of 10 to 900 parts by weight. This is applied to one or both surfaces of a heat resistant film or one surface of a release film to form an adhesive layer, thereby obtaining an adhesive tape for electronic parts.

Bisimide compound and process for the production thereof

This invention is to provide a liquid adhesive can be adhered and cured at a relatively low temperature and have sufficient heat resistance and reliability, etc., and an adhesive tape using the same. The liquid adhesive of this invention is obtainable by dissolving

A liquid adhesive comprising a dispersion of the following component (b) in a solution of the following component (a) in an organic solvent:

Liquid adhesive for electronic parts and process for forming insulating

The piperazinylethylaminocarbonyl-containing butadiene-acrylonitrile copolymer of this invention is a novel substance useful as an adhesive component for adhesive tapes, which tapes are used in the interior of a resin-sealed type semiconductor device. The copolymer has a weight average molecular weight of 10,000-200,000, and is represented by the following general formula (I) and obtained by condensing a carboxyl-containing butadiene-acrylonitrile copolymer having a weight average molecular weight of 10,000-200,000 with N-aminoethylpiperazine in the presence of a phosphite and a pyridine derivative to undergo the amidation. ##STR1## wherein k, m, and n indicate molar proportions, where n is taken as 1, k is a number in the range of 3-175, and m is a number in the range of 0.3-93.

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Shizuoka, Japan

Yukinori Sakumoto