Sekisui Kagaku Kogyo Kabushiki Kaisha

Sekisui Fine Chemical Co., Ltd.

Cosmed Pharmaceutical Co., Ltd.

Konishiroku Photo Industry Co., Ltd.

Sekisui Chemical Co., Ltd.

Hisamitsu Pharmaceutical Company, Inc.

Minoru Kohara

Kazuhiko Kanki

Kunikazu Yamada

Kazuo Saiuchi

Fumio Kamiyama

Tomoo Shiohara

Yasuhiko Araki

Mituo Nagata

Makoto Tomono

Takahira Kasuya

Goichi Yamakawa

Kazutoshi Yamazaki

Hideaki Morita

Hiroshi Miyoshi

Hirozo Funaki

Norio Sagane

Hisayuki Matsuda

Yukio Ohtsuka

Yutaka Shibata

Shinzo Yamada

It is intended to provide a composition which has well-balanced pressure-sensitive adhesiveness and cohesive force as well as favorable application properties to the skin, and a patch which has the above-described characteristics and hardly peels off. This object can be achieved by providing a composition comprising an acrylic copolymer containing from 3 to 25% by weight of hydroxyethyl (meth)acrylate as a constituent, a plasticizer and a pseudo-crosslinking compound, wherein the ratio of the content of the plasticizer to the content of the pseudo-crosslinking compound ranges from 30:1 to 250:1, and a patch.

Pressure-sensitive adhesive composition and skin patch

The invention provides a pressure-sensitive adhesive for the skin excellent in pressure-sensitive adhesiveness to the human skin and repeelability therefrom, which does not cause the horny layer to be torn away in peeling and is lowly irritant to the skin; and tapes or sheets made by using the same. The pressure-sensitive adhesive is characterized by comprising (a) 100 parts by weight of a copolymer which is prepared from an olefinic macromonomer and a vinyl monomer and whose molecular weight (in terms of polystyrene and as determined by gel permeation chromatography (GPC)) has a two-peak distribution (with the proviso that when the copolymer is to be post-cured, the distribution is one as determined before the post cure) and (b) 20 to 250 parts by weight of a softener which is compatible with the copolymer and liquid or pasty at room temperature and has a boiling point of 250 or above (with the proviso that when the content of the softener (b) exceeds 80 parts by weight, the copolymer must be post-cured).

Pressure-sensitive adhesive for the skin and tapes or sheets for the skin made by using the same

To offer adhesives for percutaneous absorption, adhesive compositions for percutaneous absorption and preparations for percutaneous absorption which show high ability to dissolve drugs and to dissolve absorption promoting agents and enable high percutaneous absorption and have suitable cohesion and adhesion and do not damage the skin when detached. Adhesives for percutaneous absorption which comprise a copolymer in which the constituents are methoxyethyl acrylate 40-60 wt %, lauryl(meth)acrylate 30-40 wt % and a polar monomer 10-25 wt % only.

Adhesive for percutaneous absorption, adhesive composition for percutaneous absorption and preparation for percutaneous absorption

A conductive fine sphere with a K-value and a recovery factor in a predetermined range is provided. Suppose a load value (kgf) is F, a compression displacement (mm) is S, and a radius (mm) is R at 10% compression deformation of this spacer, a K-value defined as the following equation is in the range of 250 kgf/mm.sup.2 to 700 kgf/mm.sup.2 at 20.degree. C., and a recovery factor after the compression deformation is in the range of 30% to 80% at 20.degree. C., and ##EQU1##

Fine sphere, a spherical spacer for a liquid crystal display element and

A coated color particle with extremely low susceptibility to decoloring is provided. The coated color particle comprises a colored core particle and a coating layer formed on the surface of the core particle, wherein the coating layer is formed by treatment of the core particle with an agent selected from the group consisting of silane compounds, silyl isocyanates, and organic titanium compounds.

Coated particle

A particulate spacer for use in a liquid crystal display cell, electrochromic display device, or the like is provided. The particulate spacer comprises a core particle and a functional layer formed on the surface of the core particle.

Particulate spacers and liquid crystal display cells containing these

The present invention relates to toners for electrophotography wherein the main resin component comprises a lower molecular weight polymer and a higher molecular weight polymer each of which is different from the other wherein the higher molecular weight polymer has a glass transition point of at least 50.degree. C. and the lower molecular weight polymer has a glass transition point no higher than 65.degree. C. The above polymers comprise one or more polymers selected from styrene polymers, arcylic polymers, and styrene-acrylic copolymers. Generally, the lower molecular weight polymer has a weight average molecular weight of 50,000 or less and the higher molecular weight polymer has a weight average molecular weight of 80,000 or more.

Toner for electrophotography

A filler for liquid chromatography, said filler consisting essentially of a hydrophilic ion-exchanger obtained by copolymerizing a mixture of (A) 5 to 90% by weight of a polymerizable monomer containing one polymerizable double bond and at least one carboxyl group per molecule and having a hydrophobic parameter of not more than 2.3, (B) 10 to 95% by weight of a crosslinkable polymerizable monomer containing at least two polymerizable double bonds per molecule and having a hydrophobic parameter of not more than 2.3, and (C) 0 to 85% by weight of a monomer being different from the monomer (A), containing one polymerizable double bond per molecule and having a hydrophobic parameter of not more than 2.3; and a method for separating a biological material such as proteins, enzymes and amino acids by liquid chromatography using the aforesaid filler.

Filler for liquid chromatography useful for separating a hemoglobin

A liquid-chromatographic filler comprising a particulate synthetic polymer, such as glycerol di or tri (meth) acrylate wherein the filler exhibits a behavior such that in chromatography using polyethylene glycol as a sample and water as an eluent, the elution time of the sample increases with a rise in temperature. Separation of water-soluble substances by liquid chromatography can be achieved by using an aqueous medium as an eluent, and this filler.

Filler for liquid chromatography and method for separating water-soluble

A process for stabilizing a chlorine-containing resin which comprises contacting a chlorine-containing resin with one or more gaseous hydrides.

Process for stabilizing chlorine-containing resins

A chlorine-containing resin composition comprising a chlorine-containing resin and at least one calcium compound selected from the group consisting of 2CaO.SiO.sub.2, 3CaO.SiO.sub.2, 3CaO.2SiO.sub.2, the above enumerated compound(s) having coated thereon an organic silicon compound, CaO.TiO.sub.2, 2CaO.TiO.sub.2, 3CaO.TiO.sub.2, CaO.Al.sub.2 O.sub.3, 2CaO.Al.sub.2 O.sub.3, 3CaO.Al.sub.2 O.sub.3, CaAl.sub.2 O.sub.4, CaB.sub.2 O.sub.6, Ca.sub.7 MgAl.sub.10 O.sub.23, CaNb.sub.2 O.sub.6, CaTa.sub.2 O.sub.6, CaTiO.sub.3, CaZrO.sub.3 and CaZrTi.sub.2 O.sub.7. The chlorine-containing resin composition may further comprise an organic acid salt and/or an organic tin compound.

Growing community of inventors

Kyoto, Japan

Minoru Kohara