Sanyo Chemical Industries, Ltd.

Masami Koike

Yoji Fujiura

Takashi Sumiya

Yukio Zenitani

Mihoko Nomoto

Noriyuki Kimura

Kengo Ochi

A gelating agent for an alkaline cell is a cross-linked polymer (A) comprising (meth)acrylic acid and/or its alkali metal salt as a main constituent monomer unit and obtained by an aqueous solution polymerization or a reversed phase suspension polymerization and satisfies the following required conditions (1), (2). The gelating agent has good draining property, satisfactorily high speed charging property of the alkaline electrolytic solution and is therefore effective to produce cells with little unevenness of the charging amount of the electrolytic solution and having uniform quality by mass production and an alkaline cell using the gelating agent is provided with durable discharge time and remarkably excellent impact resistance for a long duration. The said required conditions are required condition (1); that the gelating agent contains 50% by weight or more of a particle whose swollen particle size becomes 300 to 4,000 &mgr;m when the gelating agent is swollen in an aqueous potassium hydroxide solution of 40% by weight concentration and required condition (2); that the aqueous potassium hydroxide solution of 40% by weight concentration containing 3% by weight of the gelating agent has 0 to 20 mm stringiness.

Gelating agent for alkaline cell and alkaline cell

The present invention can provide a water-absorbent or water-retention material comprising water-absorbent resin derived from monomer unit components comprising 40 to 99 wt. % of hydroxyl alkyl (meth)acrylate, 1 to 60 wt. % of (meth)acrylic acid and/or alkali metal salt thereof and 0.00001 to 3 wt. % of crosslinking agent; and a water-absorbent or water-retention material comprising water-swellable polymer which is obtained by further thermally crosslinking a particles of partially alkaline neutralized product of a copolymer of 20 to 99 mol % of acrylamide and 1 to 80 mol % of acrylic acid. The water-absorbent or water-retention material of the present invention is not readily subject to an influence of salts, and the absorbency does not deteriorate with respect to an aqueous solution containing a great amount of metallic ion of salts.

Water-absorbent or water-retention material and production method thereof

This invention relates to a cable whose inner opening space has been sealed with a polyurethane resin formed with a polyurethane resin-forming sealing material comprising components (A) and (B). (A): a component comprising a dispersion (1) of a water-insoluble water absorbent resin (D) or its hydrogel in a polyol (C), wherein said resin (D) is formed by polymerizing in the polyol (C) a water soluble monomer or its precursor and crosslinking agent and/or polysaccharide; and (B): a component comprising an organic polyisocyanate (2); and sealing process of the same. This invention provides a cables having an excellent water preventing property without the risk of falling-off of the sealing material at the time of cable connection.

Cable sealed with a polyurethane resin and sealing process of the same

A material for treating excretions of pet animals which is obtainable by combining pulp (A), inorganic substance (B), guar gum (C) and optionally water-absorbent resin (D) to form guranules. The weight ratios of (A) to (B) to (C) to (D) is 15-55:15-55:5-40: 5-45. The treating material is capable of absorbing liquids from excretions quickly, forming into clumps when absorbing liquid and maintaining the shape of the clump even when handled for removal.

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Kyoto, Japan

Masami Koike