Patents Assigned to Sekisui Kagaku Kogyo Kabushiki Kaisha
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Patent number: 4091054Abstract: In a suspension polymerization process of preparing styrenic polymer particles from a styrenic monomer and small particles of a styrenic polymer in a definite particle size range, styrenic polymer particles having a uniform particle size are obtained without the formation of fine polymer powders by simultaneously but separately dropwise adding to an aqueous suspension of the small particles of the styrenic polymer (1) a solution of 100 - 60% by weight of a suspension polymerization catalyst and 1 - 10% by weight of the styrenic monomer and (2) a solution of 0 - 40% by weight of the catalyst and 99 - 90% by weight of the styrenic monomer simultaneously but separately from each other.Type: GrantFiled: July 17, 1975Date of Patent: May 23, 1978Assignees: Sekisui Kagaku Kogyo Kabushiki Kaisha, Sekisui Kaseihin Kogyo Kabushiki KaishaInventors: Fumio Saito, Fumito Yamai, Yositugu Beppu, Shinpei Nakayama
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Patent number: 4084463Abstract: A rotatable drum 4 is supported by rollers 5 on a travelling frame member 1, and surrounds a pipe 3 gripped by the frame member. Swing levers 6, 6' coupled at their one ends to and driven by fluid pressure cylinders 10, 10' are pivotally mounted on the drum at journals 7, 7', and guide rollers 11, 11' and associated cutting and chamfering members 9, 9' rotatably driven by motors 8, 8' are mounted on the swing levers and extend inwardly towards the pipe. Pressure fluctuations in the cylinders are absorbed by accumulators 13, 13', whereby the chamfering and cutting members are sequentially driven into engagement with and smoothly follow the uneven contours of the pipe surface.Type: GrantFiled: January 14, 1977Date of Patent: April 18, 1978Assignee: Sekisui Kagaku Kogyo Kabushiki KaishaInventors: Takahiro Kanbara, Toshihiko Mituhara
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Patent number: 4085169Abstract: Styrenic polymer particles having a substantially uniform particle size are prepared by suspending styrenic polymer particles having particle sizes in a certain range in water to provide an aqueous suspension and after adding to the suspension a styrenic monomer, a suspension polymerization catalyst and a polymerization retarder in an amount of 1/200 to 1/15 mole per 1 mole of the catalyst, conducting the suspension polymerization. By conducting the polymerization in the presence of a foaming agent, one can produce foamable styrenic polymer particles having a substantially uniform particle size.Type: GrantFiled: September 29, 1975Date of Patent: April 18, 1978Assignees: Sekisui Kagaku Kogyo Kabushiki Kaisha, Sekisui Kaseihin Kogyo Kabushiki KaishaInventors: Fumio Saito, Fumito Yamai, Yositugu Beppu, Shinpei Nakayama
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Patent number: 4066546Abstract: A continuous filtering process and apparatus therefor in which a violent turbulence of fluid to be filtered is caused in a filter tank through which the fluid is continuously flowed. The turbulence is caused by rapidly rotating rotators which are arranged in the filter tank so that the surfaces of the rotators face the surfaces of filter media provided in hollow filter disks. A small interval such as three or five millimeters occurs between the rotators and the filter disks. Such violent turbulence of the fluid rapidly disperses concentrated fluid from the surfaces of the filter media so that the clogging of the filter media or the formation of a concentrated polarization layer is substantially prevented. Continuity of the filtering operation is therefore increased even when filter media having very fine perforations therethrough are employed.Type: GrantFiled: October 8, 1975Date of Patent: January 3, 1978Assignees: Toshin Science Co., Ltd., Sekisui Kagaku Kogyo Kabushiki KaishaInventor: Jiro Sasaki
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Patent number: 4065342Abstract: Method and apparatus for producing a synthetic resin tube by deforming a strip of synthetic resin and joining both lateral surfaces of the deformed strip together while transporting the strip in its longitudinal direction.Type: GrantFiled: November 11, 1976Date of Patent: December 27, 1977Assignee: Sekisui Kagaku Kogyo Kabushiki KaishaInventors: Mikio Kobayashi, Isamu Nakano
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Patent number: 4052243Abstract: An improved method for effecting cross-lamination of wide warp and weft webs is provided, wherein a continuous row of cut weft webs having a length corresponding to the width of the warp web to be cross-laminated thereto and arranged in side by side relationship is temporarily prepared on a warp material which is (1) a belt means from which said row of weft webs is transferred onto a warp web in order to be fixed thereto for effecting cross-lamination, (2) a warp web backed up by a belt means from which said row is peeled off in the state loaded on the warp web in order to be fixed thereto for effecting cross-lamination, or (3) a warp web itself to which said row is fixed for effecting cross-lamination, so that the warp material travelling crosswise over the cut weft web at a vertical distance apart therefrom and having been wetted with a liquid having adhesion property to the surface thereof facing said cut weft webs is subjected to successive reciprocating vertical motions so as to touch and pick up the cutType: GrantFiled: July 27, 1976Date of Patent: October 4, 1977Assignees: Polymer Processing Research Institute Ltd., Sekisui Kagaku Kogyo Kabushiki KaishaInventors: Masahide Yazawa, Haruhisa Tani, Masaki Matsumoto, Yasuo Sasaki
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Patent number: 4052350Abstract: 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.Type: GrantFiled: November 28, 1975Date of Patent: October 4, 1977Assignee: Sekisui Kagaku Kogyo Kabushiki KaishaInventors: Tomoo Shiohara, Minoru Kohara, Hiroshi Miyoshi
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Patent number: 4043574Abstract: In a pipe fitting adapted for joining plastic pipes by fusing, one or more notches are provided in portions of the pipe fitting to receive molten resinous material overflowing during the fusing operation.Type: GrantFiled: December 18, 1975Date of Patent: August 23, 1977Assignee: Sekisui Kagaku Kogyo Kabushiki KaishaInventor: Teryoshi Asano
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Patent number: 4036930Abstract: Resin tubes having thick walled portions and thin walled portions are formed by providing a specially configured orifice on an extruder and varying the rate at which the extruded resin tube is pulled from the extruder. The orifice is shaped to form a thin tubular opening and a thick tubular opening communicating with one another, the thick tubular opening being adjacent and down-stream of the thin opening. When the extruded resin tube is pulled at a high speed the thin tubular opening is filled with resin that passes through but does not fill the thick tubular opening. At the slow pulling speed the resin fills at least the open-end portion of the thick tubular opening thereby forming a thick walled portion of the resin tube.Type: GrantFiled: September 24, 1975Date of Patent: July 19, 1977Assignee: Sekisui Kagaku Kogyo Kabushiki KaishaInventors: Sadao Murai, Takeshi Kita, Kiyoshi Mochizuki
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Patent number: 4037004Abstract: Method for producing a thermoplastic resin film or sheet useful for chelate color printing which involves contacting at least one surface of a thermoplastic resin film or sheet with a mixed liquid composition comrising (i) a liquid capable of dissolving or swelling said thermoplastic resin, (ii) a liquid having no ability to dissolve or swell said thermoplastic resin, being compatible with said liquid (i) and having a faster rate of evaporation than said liquid (i), and (iii) an inorganic compound containing at least one metal atom selected from the group consisting of iron, vanadium, titanium, molybdenum and tungsten, or an organic compound capable of forming a chelate compound with the metal atom and developing a color, and evaporating off said liquids (i) and (ii), thereby to form a porous surface layer of the film or sheet to which is adhered an uppermost chelate color printing layer comprising said inorganic or organic compound (iii).Type: GrantFiled: October 3, 1974Date of Patent: July 19, 1977Assignees: Sekisui Kagaku Kogyo Kabushiki Kaisha, Tomoegawa Paper Co., Ltd.Inventors: Shiro Nakano, Norio Kanbe, Tsugumichi Nakagawa, Akira Nishio, Kengo Kitahara
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Patent number: 4025257Abstract: An apparatus for continuously manufacturing an elongated shaped article reinforced by a multiplicity of continuous and parallel fibers is provided. The apparatus includes a series of means for arranging a multiplicity of advancing continuous and parallel fibers into a sheet-like bundle of fibers, means for impregnating the sheet-like bundle of fibers with a liquid foamable resin, means for receiving and gathering the resin impregnated sheet-like bundle of fibers into a gathered bundle of fibers having the resin dispersed therein, a moveable molding passage of three or more endless belts facing one another in parallel relationship and having a cross-section perpendicular to the direction of movement of the fibers corresponding to the cross-section of the desired shaped article and which contact and move with the resin-impregnated bundle of fibers to form the elongated shaped article and means for extracting the elongated shaped article from the molding passage.Type: GrantFiled: June 12, 1975Date of Patent: May 24, 1977Assignee: Sekisui Kagaku Kogyo Kabushiki KaishaInventors: Norio Sagane, Toru Morimoto, Fumihiko Okagawa
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Method for preparing a porous structure by stretching a resin sheet useful as an electrode separator
Patent number: 4024213Abstract: A resin sheet having a porous layered structure useful as an electrode separator for electric cells, said sheet comprising (a) an olefin resin, (b) a finely divided inorganic substance, and (c) at least one substance selected from the group consisting of (i) a water-swellable thermoplastic resin, (ii) a water-insoluble or difficultly water-soluble hydrophilic nonionic surface active agent, and (iii) a water-insoluble difficultly water-soluble hydrophilic anionic surface active agent, said sheet including fine pores arranged throughout its cross section in a plurality of layers, at least some of them forming open cells.The above sheet is prepared by a process comprising fabricating a mixture containing the above components (a), (b) and (c) into a sheet, and stretching the sheet in at least one direction.Type: GrantFiled: February 19, 1975Date of Patent: May 17, 1977Assignee: Sekisui Kagaku Kogyo Kabushiki KaishaInventors: Seiichirou Honda, Hiroyoshi Hata, Yosimasa Simura, Soichi Une -
Patent number: 4020639Abstract: The installation of pipes having oval cross sections is made easier by including an installation portion which has a flat base perpendicular to the major axis of the oval cross section.Type: GrantFiled: December 29, 1975Date of Patent: May 3, 1977Assignee: Sekisui Kagaku Kogyo Kabushiki KaishaInventors: Syoji Nagare, Kozo Osawa
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Patent number: 4020217Abstract: A laminated safety glass structure which comprises at least two glass sheets bonded to each other through an interlayer of a plasticized polyvinyl acetal resin treated with a specific modified siloxane alone or together with a specific alkali metal or alkaline earth metal salt of an organic mono- or di-carboxylic acid. This structure has a highly improved penetration resistance along with superior transparency, aging resistance and weatherability, and is suitable for use as windowpanes in transportation facilities and buildings.Type: GrantFiled: March 7, 1975Date of Patent: April 26, 1977Assignee: Sekisui Kagaku Kogyo Kabushiki KaishaInventors: Isao Karasudani, Toshiyuki Takashima, Yoshiyuki Bokuda
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Patent number: 4013476Abstract: A non-combustible molding material is produced from (a) a hydraulic inorganic mixture consisting of an inorganic substance composed predominantly of silica and an inorganic substance predominantly of calcium oxide, (b) mineral fibers, and (c) a substance selected from the group consisting bitumen, crystalline aluminum oxide, sulfur, metal sulfide and vanadum oxide. A non-combustible molded article having superior flexural strength and low water absorption can be prepared using said material.Type: GrantFiled: September 30, 1974Date of Patent: March 22, 1977Assignee: Sekisui Kagaku Kogyo Kabushiki KaishaInventors: Harutoshi Ueda, Naoyuki Suzuki, Masami Nagao
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Patent number: 4009069Abstract: Method and apparatus for producing a synthetic resin tube by deforming a strip of synthetic resin and joining both laterally disposed edges of the deformed strip together while transporting the strip in its longitudinal direction.Type: GrantFiled: January 27, 1975Date of Patent: February 22, 1977Assignee: Sekisui Kagaku Kogyo Kabushiki KaishaInventors: Mikio Kobayashi, Isamu Nakano
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Patent number: 3988402Abstract: A non-combustible molding material is produced from (a) a hydraulic inorganic mixture consisting of an inorganic substance composed predominantly of silica and an inorganic substance predominantly of calcium oxide, (b) mineral fibers, and (c) a substance selected from the group consisting bitumen, crystalline aluminum oxide, sulfur, metal sulfide and vanadum oxide. A non-combustible molded article having superior flexural strength and low water absorption can be prepared using said material.Type: GrantFiled: September 27, 1974Date of Patent: October 26, 1976Assignee: Sekisui Kagaku Kogyo Kabushiki KaishaInventors: Harutoshi Ueda, Naoyuki Suzuki, Masami Nagao
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Patent number: 3978180Abstract: A non-combustible moulding material is produced from (a) a hydraulic inorganic mixture consisting of an inorganic substance composed predominantly of silica and an inorganic substance predominantly of a source of calcium oxide, (b) mineral fibers, and (c) a substance selected from the group consisting bitumen, crystalline aluminum oxide, sulfur, metal sulfide and vanadum oxide. A non-combustible molded article having superior flexural strength and low water absorption can be prepared using said material.Type: GrantFiled: September 26, 1974Date of Patent: August 31, 1976Assignee: Sekisui Kagaku Kogyo Kabushiki KaishaInventors: Harutoshi Ueda, Naoyuki Suzuki, Masami Nagao
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Patent number: 3967978Abstract: A resin sheet having a porous layered structure useful as an electrode separator for electric cells, said sheet comprising (a) an olefin resin, (b) a finely divided inorganic substance, and (c) at least one substance selected from the group consisting of (i) a water-swellable thermoplastic resin, (ii) a water-insoluble or difficultly water-soluble hydrophilic nonionic surface active agent, and (iii) a water-insoluble difficultly water-soluble hydrophilic anionic surface active agent, said sheet including fine pores arranged throughout its cross section in a plurality of layers, at least some of them forming open cells.The above sheet is prepared by a process comprising fabricating a mixture containing the above components (a), (b) and (c) into a sheet, and stretching the sheet in at least one direction.Type: GrantFiled: March 28, 1974Date of Patent: July 6, 1976Assignee: Sekisui Kagaku Kogyo Kabushiki KaishaInventors: Seiichirou Honda, Hiroyoshi Hata, Yosimasa Simura, Soichi Une
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Patent number: 3962390Abstract: A method of producing shaped articles of thermoplastic resin having a non-foam layer and foam layer, which comprises introducing into a mold thermoplastic resin particles not containing a heat-decomposable blowing agent and thermoplastic resin particles containing such a blowing agent and having a greater heat capacity than said resin particles not containing a blowing agent, heating the mold and, in the meantime, moving said particles in said mold to effect the heat-melting of said particles as well as the heat-decomposition of said blowing agent.Type: GrantFiled: May 21, 1974Date of Patent: June 8, 1976Assignee: Sekisui Kagaku Kogyo Kabushiki KaishaInventors: Hisayuki Mori, Eiichi Adachi, Yoji Noguchi