Patents Assigned to Tonen Chemical Corporation
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Patent number: 5632152Abstract: Artificial snow granule in granule form comprising a super absorbent polymer in granule form as a nucleus and an ice layer surrounding the nucleus is provided here. An aggregate form is provided by linkage of adjacent ice layers and/or granules. Further, a snow granule quality improver is provided. A method for making the above-mentioned snow granule in a granule or an aggregate form is also provided here.Type: GrantFiled: May 18, 1995Date of Patent: May 27, 1997Assignees: Miura Dolphins Co., Ltd., Tonen Corporation, Osaka Organic Chemical Industry Co., Ltd., Tonen Chemical Corporation, Sanyo Electric Co., Ltd., Masahisa OhtsukaInventors: Yuichiro Miura, Kazuo Hirano, Takayuki Nate, Taiji Kambayashi, Masahisa Ohtsuka, Toshitake Nagai
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Patent number: 5621046Abstract: A polypropylene resin composition including (A) 50-90 parts by weight of a polypropylene resin including (a) 3-30 weight % of stereoblock polypropylene having a weight-average molecular weight of 5,000-1,000,000, a percentage of five continuous propylene monomer units in which all propylene bonds are meso bonds and a percentage of five continuous propylene monomer units in which all propylene bonds are racemic bonds being 70% or more and 5% or more, respectively relative to the all propylene bonds, and (b) 70-97 weight % of an ultra-high stereospecific polypropylene having a melt flow rate of 0.1-1,000 g/10 minutes, an average meso chain length Nm calculated from a triad percentage determined from .sup.13 C-NMR spectrum by the following formula of Nm=2[mm]/[mr]+1, wherein [mm] is (isotactic triad/total triad).times.100 (%) and [mr] is (heterotactic triad/total triad).times.100 (%), meeting a relation of Nm>250+29.Type: GrantFiled: July 11, 1995Date of Patent: April 15, 1997Assignees: Tonen Chemical Corporation, Toyota Jidosha Kabushiki KaishaInventors: Kunio Iwanami, Masatoshi Ohkura, Satoshi Ueki, Shigeyuki Toki, Takeyoshi Nishio, Takao Nomura
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Patent number: 5609947Abstract: A laminated non-woven fabric for filtering medium, which is composed of a plurality of non-woven fabric layers having different average pore sizes and laminated in the order of the average pore size, and a plurality of entangled regions interposed between any of adjacent two non-woven fabric layers which is formed by causing fibers of one of the adjacent two non-woven fabric layers to penetrate into the other layers to entangle the penetrated fibers with fibers of the other layers. The presence of the entangled regions provide a gradual change of the pore size from a non-woven fabric layer to another non-woven fabric layer to result in a good filtering efficiency and an elongated lifetime of a filter.Type: GrantFiled: September 27, 1995Date of Patent: March 11, 1997Assignee: Tonen Chemical CorporationInventors: Toshikazu Kamei, Hidetoshi Takeuchi, Makoto Suzuki
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Patent number: 5556671Abstract: Artificial snow granule in granule form comprising a super adsorbent polymer in granule form as a nucleus and an ice layer surrounding the nucleus is provided here. An aggregate form is provided by linkage of adjacent ice layers and/or granules. Further, a snow granule quality improver is provided. A method for making the above-mentioned snow granule in a granule or an aggregate form is also provided here.Type: GrantFiled: March 15, 1995Date of Patent: September 17, 1996Assignees: Miura Dolphins Co., Ltd., Tonen Corporation, Osaka Organic Chemical Industry Co., Ltd., Tonen Chemical Corporation, Sanyo Electric Co., Ltd., Masahisa OhtsukaInventors: Yuichiro Miura, Kazuo Hirano, Takayuki Nate, Taiji Kambayashi, Masahisa Ohtsuka, Toshitake Nagai
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Process for controlling a particle size of polyarylene sulfide and polyarylene sulfide thus produced
Patent number: 5475081Abstract: A particle size of potyarylene sulfide obtained in polymerization is controlled by a process characterized in that a gaseous phase part of a reactor is cooled or heated after starting decreasing a temperature of a reaction system o an end of precipitation of polyarylene sulfide formed In an embodiment, a water content in the reaction system is 0.8 to 1.7 moles per mole of the alkali metal sulfide; the gaseous phase part of the reactor is cooled in a polymerization stage to thereby condense a part of a gaseous phase in the reactor and the condensed liquid is refluxed to a liquid phase in the reactor; and the gaseous phase part is only cooled after starting decreasing the temperature of the reaction system, whereby high molecular weight polyarylene sulfide suitable for powder coating is formed, which has a weight average molecular weight of at least 30,000 and an average particle size of 50 to 80 .mu.m, wherein particles of 40 to 150 .mu.Type: GrantFiled: November 12, 1993Date of Patent: December 12, 1995Assignee: Tonen Chemical CorporationInventors: Yoichi Imai, Osamu Komiyama, Kazuhiro Ichikawa -
Patent number: 5461105Abstract: A resin composition having excellent paint coatability containing (a) 50-80 weight % of a multi-stage polymerized propylene-ethylene block copolymer consisting essentially of (i) a propylene homopolymer portion, (ii) a propylene-ethylene random copolymer portion, and (iii) an ethylene homopolymer portion, (b) 20-40 weight % of an ethylene-.alpha.-olefin copolymer elastomer, and (c) 20 weight % or less of an inorganic filler, components in the components (a) and (b), which are soluble in p-xylene at a room temperature, having a number-average molecular weight of 4.times.10.sup.4 or more and a weight-average molecular weight of 20.times.10.sup.4 or more.Type: GrantFiled: April 3, 1995Date of Patent: October 24, 1995Assignees: Tonen Chemical Corporation, Toyota Jidosha Kabushiki KaishaInventors: Yoshiharu Saito, Masao Sakaizawa, Kunio Iwanami, Kitsusho Kitano, Michihisa Tasaka, Kenji Kawazu, Shizuo Miyazaki, Takao Nomura, Takeyoshi Nishio, Hisayuki Iwai
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Patent number: 5438091Abstract: A resin composition having excellent paint coatability containing (a) 50-80 weight % of a multi-stage polymerized propylene-ethylene block copolymer consisting essentially of (i) a propylene homopolymer portion, (ii) a propylene-ethylene random copolymer portion, and (iii) an ethylene homopolymer portion, (b) 20-40 weight % of an ethylene-.alpha.-olefin copolymer elastomer, and (c) 20 weight % or less of an inorganic filler, components in the components (a) and (b), which are soluble in p-xylene at a room temperature, having a number-average molecular weight of 4.times.10.sup.4 or more and a weight-average molecular weight of 20.times.10.sup.4 or more.Type: GrantFiled: October 25, 1994Date of Patent: August 1, 1995Assignees: Tonen Chemical Corporation, Toyota Jidosha Kabushiki KaishaInventors: Yoshiharu Saito, Masao Sakaizawa, Kunio Iwanami, Kitsusho Kitano, Michihisa Tasaka, Kenji Kawazu, Shizuo Miyazaki, Takao Nomura, Takeyoshi Nishio, Hisayuki Iwai
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Patent number: 5384172Abstract: A multi-layer plastic fuel tank is constituted by at least one high-density polyethylene layer, at least one polyamide layer, and at least one modified high-density polyethylene layer made of high-density polyethylene modified with an unsaturated carboxylic acid or its derivatives, which is interposed between each high-density polyethylene layer and each polyamide layer for bonding them, the polyamide layer being made of a polyamide copolymer comprising 90-60 weight % of polyamide 6 and 10-40 weight % of polyamide 66.Type: GrantFiled: August 23, 1993Date of Patent: January 24, 1995Assignees: Tonen Chemical Corporation, Toyota Jidosha Kabushiki KaishaInventors: Yutaka Takado, Toshikazu Nakasato, Tetsuro Nogata, Eiji Tezuka, Toshio Yokoi
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Patent number: 5342920Abstract: High molecular weight polyarylene sulfide prepared by reacting an alkali metal sulfide with a dihaloaromatic compound in an organic amide solvent, wherein a gaseous phase part of a reactor is cooled to thereby condense a part of a gaseous phase in the reactor, and the condensed liquid is refluxed to a liquid phase in the reactor. Higher molecular weight is attained by copolymerization with 0.005 to 1.5 mole percent, based on the alkali metal sulfide, of a polyhaloaromatic compound.Type: GrantFiled: December 16, 1992Date of Patent: August 30, 1994Assignee: Tonen Chemical CorporationInventors: Yoichi Imai, Toshiyuki Hirano, Osamu Komiyama, Hidenori Yamanaka
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Patent number: 5227233Abstract: A label comprising a polyethylene film in which the degree of crosslinking inwardly decreases across the thickness of the film and on one side of which printing is performed, and an adhesive layer further formed thereon. The label is good in clarity, is possible to perform back surface printing, can provide an integral feeling and a high-class feeling as if curved-surface printing is performed on a cylindrical container itself, is sufficient in rigidity and strength and therefore is possible to be thinly formed, is resistant to water wetting and contamination, is unnecessary to be stripped in recovering and recycling a polyethylene bottle when the label is stuck thereon, can be stuck on the bottle concurrently with blow molding of the bottle printed, and is therefore suitable for use as a label for in-molding.Type: GrantFiled: November 6, 1991Date of Patent: July 13, 1993Assignee: Tonen Chemical CorporationInventors: Yasushi Itaba, Yutaka Yoshifuji
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Patent number: 5210229Abstract: Gamma-butyrolactone is prepared by catalytic dehydrogenation of 1,4-butanediol in a gaseous phase in the presence of a catalyst comprising copper, chromium, and manganese and/or barium. Improvement is in that the catalyst further contains sodium and/or potassium, whereby formation of by-products is suppressed and high yield, high selectivity and prolonged catalyst life are attained.Type: GrantFiled: July 16, 1992Date of Patent: May 11, 1993Assignee: Tonen Chemical CorporationInventors: Tatsumi Ichiki, Kaori Mori, Sadakatsu Suzuki, Hiroshi Ueno, Kenji Kobayashi
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Patent number: 5177043Abstract: This invention relates to a catalytic component for the polymerization of .alpha.-olefins and provides a catalytic component of magnesium support type capable of exhibiting a high stereoregularity while maintaining an improved strength as well as a high catalytic activity. The features thereof consist in a catalyst component for the polymerization of .alpha.-olefins obtained by contacting (A) a solid component comprising, as essential components, magnesium, titanium, a halogen and an electron-donating compound with (D) an olefin in the presence of (B) a trialkylaluminum and (C) a dimethoxy group-containing compound represented by the general formula R.sup.1 R.sup.2 Si(OCH.sub.3).sub.2 where R.sup.1 and R.sup.2 are, same or different, aliphatic hydrocarbon groups with 1 to 10 carbon atoms and having a volume, calculated by the quantum chemistry calculation, of 230 to 500 .ANG..sup.3 and an electron density of oxygen atoms in the methoxy group, calculated similarly, ranging from 0.685 to 0.800 A. U.Type: GrantFiled: March 22, 1991Date of Patent: January 5, 1993Assignee: Tonen Chemical CorporationInventors: Naomi Koyama, Hiroyuki Furuhashi, Miyuki Usui, Tomoko Okano, Masahide Murata, Satoshi Ueki, Akira Nakano
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Patent number: 5091435Abstract: The cross-linkable, foamable polyolefin resin composition capable of forming foams with excellent mechanical properties and heat resistance is made of (a) 30-80 weight % of a propylene-ethylene random copolymer having an ethylene content of 1.5-6 weight %; (b) 10-60 weight % of a propylene-ethylene random copolymer having an ethylene content of 0.2-1.0 weight %; (c) 10-60 weight % of a linear low-density polyethylene; and (d) 1-30 parts by weight, per 100 parts by weight of the above resin components, of a foaming agent.Type: GrantFiled: July 5, 1991Date of Patent: February 25, 1992Assignee: Tonen Chemical CorporationInventors: Toshiaki Suzuki, Sotoyuki Kitagawa, Takashi Nakayama, Takao Kuno
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Patent number: 5089360Abstract: The high-strength non-woven fabric comprises 100 parts by weight of a non-woven fabric having an apparent fiber diameter of 0.1-15 .mu.m; and 0.3-10 parts by weight of an N-methylol or N-alkoxymethyl nylon resin applied to the non-woven fabric, the N-methylol or N-alkoxymethyol nylon resin being cross-linked. The high-strength non-woven fabric has high mechanical strength with small maximum pore diameter. It is suitable for battery separators.Type: GrantFiled: February 7, 1991Date of Patent: February 18, 1992Assignee: Tonen Chemical CorporationInventors: Tomoaki Kanno, Yoshihisa Matsushima, Makoto Suzuki
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Patent number: RE34607Abstract: The cross-linkable, foamable polyolefin resin composition capable of forming foams with excellent mechanical properties and heat resistance is made of (a) .[.30-80.]. .Iadd.14-80 .Iaddend.weight % of a propylene-ethylene random copolymer having an ethylene content of 1.5-6 weight %; (b) 10-60 weight % of a propylene-ethylene random copolymer having an ethylene content of 0.2-1.0 weight %; (c) 10-60 weight % of a linear low-density polyethylene; and (d) 1-30 parts by weight, per 100 parts by weight of the above resin components, of a foaming agent.Type: GrantFiled: February 4, 1993Date of Patent: May 10, 1994Assignee: Tonen Chemical CorporationInventors: Toshiaki Suzuki, Sotoyuki Kitagawa, Takashi Nakayama, Takao Kuno