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81. 发明专利

JPH0337232A MOISTURE-SHRINKING RESIN MOLDING 失效
公开(公告)号：JPH0337232A
公开(公告)日：1991-02-18
申请号：JP17325289
申请日：1989-07-04
申请人： SANYO CHEMICAL IND LTD
发明人： SAKAKIBARA TOKU , TANAKA KEIJI , FUJIURA YOJI
IPC分类号： C08J5/00 , B29C55/02 , B29C61/06
摘要： PURPOSE:To obtain the subject molding which can shrink within a short time even at a low temperature merely by absorbing moisture and is capable of package, etc., suited for the shape of an irregularly shaped article, by stretching a mixture of a hydrophilic resin with a thermoplastic resin. CONSTITUTION:A moisture-shrinking resin molding is obtained by stretching a mixture of a hydrophilic resin (a nonionic resin, an anionic resin, a cationic resin or an amphoteric resin) with a thermoplastic resin (particularly desirably one containing an acrylic ester elastomer), e.g. starch/polymethyl methacrylate mixture. This molding can be conveniently used without requiring any special shrinking apparatus and can shrink within a short time when it absorbs moisture even at a low temperature. When an irregularly shaped article is wrapped with the molding in the form of a film and left under high humidity conditions, the film can shrink in conformity with the shape of the article and can pack it. Therefore, the molding can be used for a heat-sensitive article to which any conventional shrinking resin composition cannot be applied.

82. 发明专利

JPH02195652A ELECTROLYTE GELLING AGENT OF DRY BATTERY 失效
公开(公告)号：JPH02195652A
公开(公告)日：1990-08-02
申请号：JP1478989
申请日：1989-01-23
申请人： SANYO CHEMICAL IND LTD
发明人： SAKAKIBARA TOKU , TANAKA KENJI , TANAKA KEIJI
IPC分类号： H01M6/22
摘要： PURPOSE:To improve the anti-leakage property of a battery and to maintain the discharge property stable for a long period by using a sulfonic water- absorbent resin and/or a nonionic water-absorbent resin as the main component of an electrolyte gelling agent of a manganese dry battery. CONSTITUTION:A sulfonic water-abosorbent resin and/or a nonionic water- abosorbent resin are used as the main component of the catalyst gelling agent. As the sulfonic water-absorbent resin, can be used a water absorbent resin or the like which is made by polymerizing a vinyl monomer A including a sulfonic radical, a copolymer type bridging agent B, and a nonionic vinyl monomer C and/or another anion type vinyl monomer D when necessary, and may be neutralized or partially neutralized with an alkaline compound. Such a gelling agent and a manganese dry battery using such a gelling agent present a good liquid-absorbent and viscosity promoting properties to both a zinc chloride electrolyte and an ammonium chloride/zinc chloride mixture electrolyte.

83. 发明专利

JPH0279911A WATER-HOLDING AGENT FOR SOIL AND WATER-HOLDING METHOD 失效
公开(公告)号：JPH0279911A
公开(公告)日：1990-03-20
申请号：JP23089788
申请日：1988-09-14
申请人： SANYO CHEMICAL IND LTD
发明人： TANAKA KEIJI , TANAKA KENJI , SAKAKIBARA TOKU
IPC分类号： A01G1/00
摘要： PURPOSE:To obtain water-absorbing polymer suitable as water-holding agent for soil having excellent stability of water-absorbed gel to sunshine, large water- absorbability and neutral pH by randomly copolymerizing specific amount of nonionic hydrophilic monomer as essential composing unit. CONSTITUTION:A random copolymer containing (A1) monomer having carboxylic acid group, (A2) monomer having carboxylic acid salt, (B) nonionic hydrophilic monomer (e.g., hydroxyalkyl acrylate) and (C) polymerizable crosslinking agent as essential composing units is used as a water-holding agent for soil. Molar ratio of A1 component and A2 component is 50:50-5:95 and fractions of every components in the copolymer are 50-97.99mol% of A1 component +A2 component, 2-30mol% of B component and 0.01-5mol% of C component.

84. 发明专利

JPH0276534A TRAY FOR FOOD 失效
公开(公告)号：JPH0276534A
公开(公告)日：1990-03-15
申请号：JP22812688
申请日：1988-09-12
申请人： SANYO CHEMICAL IND LTD
发明人： YAMAGUCHI YUZO , TANAKA KENJI , TANAKA KEIJI
IPC分类号： B65D81/26 , A23B4/06 , A23B4/07
摘要： PURPOSE:To enable the food tray to have the functions to absorb dripping from food, thawing water and condensed dews by providing the tray with small holes or slits through which liquid can pass on the food-contacting face and with moisture retention and water absorption layers on the outer faces with which the food does not contact. CONSTITUTION:A food tray made of a moisture-impermeable material such as a thermoplastic resin 1 has small holes or slit 2 through which liquid can pass formed on its faces contacting with the food and has the water absorption and moisture retention layer 3 formed on a part or the whole part of the outer faces which does not contact with the food. The water absorption and water retention layers 3 may be a laminated material which comprises a layer of water absorption polymer on the side contacting with the small holes or slits and another moisture-impermeable material on the outer face of the water absorption polymer layer, or may be another laminated material which comprises a water-insoluble and moisture-permeable material on the side contacting with the small holes or slits, the water absorption polymer layer, as an intermediate layer, and water-impermeable layer on its outer face.

85. 发明专利

JPH01259084A HEAT-RESPONDING MATERIAL 失效
公开(公告)号：JPH01259084A
公开(公告)日：1989-10-16
申请号：JP8778588
申请日：1988-04-08
申请人： SANYO CHEMICAL IND LTD
发明人： TANAKA KEIJI , AKAMATSU TAKASHI , JO KIYOKAZU , SATO YASUO
IPC分类号： C08B37/08 , B01J20/26 , C09K5/00
摘要： PURPOSE:To provide the subject material containing an oxyalkylene ether of a polysaccharide as a constituent component, insoluble and non-swellable in water, having water absorption reversibly varying with temperature, contracting with heat to release absorbed water even in the presence of large excess water and useful as a temperature sensor, etc. CONSTITUTION:The objective material is composed of a crosslinked polymer or graft crosslinked polymer of an oxyalkylene ether of a polysaccharide (preferably chitosan) and preferably a vinyl monomer and is useful as a concentrating and separating agent for water-soluble organic substance, a mechanochemical element material, a moisture-controlling agent for toy, an anti-fogging agent, etc.

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