Dai-ichi Kogyo Seiyaku Co., Ltd.

Chuzo Isoda

Takeshi Fujita

Sejin Pu

Shigeo Mori

Katsuaki Matsuo

Kazuyo Aketa

Takuji Nakano

Satoshi Teshima

Osamu Sugimoto

Tsuyoshi Fujiwara

This invention relates to a water-soluble fiber and a method of manufacturing the fiber. The water-soluble fiber of the invention is composed of a high molecular compound with a weight average molecular weight of not less than 10,000, which high molecular compound is obtainable by reacting a polyalkylene oxide compound, which is obtainable by addition polymerization of an ethylene oxide-containing alkylene oxide and an organic compound containing two active hydrogen atoms, with a polycarboxylic acid, an anhydride thereof, a lower alkyl ester thereof, or a diisocyanate and is manufactured by spinning the same high molecular compound. The water-soluble fiber of the invention is not only high in elongation and tensile strength but is readily soluble in water.

Water-soluble fiber and a method for manufacture therefor

Water-soluble fiber and a method for manufacture thereof

First of all, a high molecular sheet comprising a composite whose principal component is a special water soluble high molecular compound, or a multilayer sheet wherein a water soluble high molecular layer is piled on sheet material is prepared. Then, said sheet is layered on the entry side of a lamination substrate comprising insulating material and metallic foil. In this state, thru-holes are formed in the lamination substrate through said sheet. When forming thru-holes, said water soluble high molecular compound serves as a lubricant so as to extend drill life. In addition, it is possible to drill a lot of substrates, which are layered, at one time, resulting in the improvement of production efficiency.

Method for drilling thru-holes on a lamination substrate and a sheet

The present invention relates to a film-shape soap comprising (a) a water soluble polymer and (b) a soap; said water soluble polymer is a polyester of polyether polyol having an average molecular weight of more than about 1,000 and a polycarboxylic acid, and has a weight average molecular weight of not less than about 20,000, which has a rapid soluble time in water in spite of a lower equilibrium moisture content, excellent washability, little stimulation to a skin, flexible (not brittle) and stable properties, and is suitable for a portable type toilet soap, disposable soap and the like.

Film-shape soap

This invention relates to methods for porous resin moldings, for ultrafine fibers for ultrafine fiber nonwoven fabrics. In essence, the invention comprises providing a molding, spun fiber or crude nonwoven fabric containing a thermoplastic resin and a special high molecular compound which has an adequate affinity for the thermoplastic resin and able to dissolve rapidly in water and dissolving out the high molecular compound from the molding, spun fiber or crude nonwoven fabric. The method of the invention involve no risk of explosion or fire hazard in manufacture, free from adverse effects on health, and help curtail the manufacturing time.

Methods for manufacture of porous resin moldings, ultrafine fibers and

A composition capable of providing a polyurethane resin having an improved lipophilic property which comprises an organic polyisocyanate compound, and a polyol component containing a polyether polyol having at least 10% by weight of units of an alkylene oxide having 6 or more carbon atoms, the polyether polyol having an excellent compatibility with an aliphatic hydrocarbon compound or with a hydroxy-terminated diene polymer, its hydrogenation product and a hydroxy-terminated olefin polymer.

Polyurethane composition

Properties of paraffinic or naphthenic mineral oil lubricants may be improved by admixing therewith a polyalkylene oxide compound having a C.sub.2 -C.sub.4 alkylene oxide moiety and a C.sub.6 -C.sub.40 alkylene oxide moiety.

Lubricating oil composition comprising a polyalkylene oxide additive

Polyisocyanurate foam is produced by reacting a polyisocyanate component with an anhydrous reaction product between a dibasic acid anhydride and a partially alcoholated polyether-polyol with an alkali metal hydroxide and/or alkaline earth metal hydroxide. The reaction product acts as a catalyst for trimerizing the polyisocyanate and also as a polyether-polyol component.

Growing community of inventors

Kyoto, Japan

Chuzo Isoda