Patents Assigned to Mitsui Petrochemical Ind., Ltd.
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Patent number: 6383396Abstract: The present invention relates to an absorbent comprising at least one cycloolefin copolymer which contains polymerized units which are derived from at least one cyclic and at least one acyclic olefin.Type: GrantFiled: June 15, 2000Date of Patent: May 7, 2002Assignees: Ticona GmbH, Mitsui Petrochemical Ind., Ltd.Inventors: Freddy Helmer-Metzmann, Alexandra Jacobs
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Patent number: 6132622Abstract: The present invention relates to an absorbent comprising at least one cycloolefin copolymer which contains polymerized units which are derived from at least one cyclic and at least one acyclic olefin.Type: GrantFiled: June 12, 1998Date of Patent: October 17, 2000Assignees: Ticona GmbH, Mitsui Petrochemical Ind. Ltd.Inventors: Freddy Helmer-Metzmann, Alexandra Jacobs
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Patent number: 6020444Abstract: The present invention relates to a process for preparing a cycloolefin copolymer by polymerization of at least one cyclic olefin and at least one acyclic olefin in the presence of a catalyst comprising at least one metallocene compound of the formula I, ##STR1## where L is a .pi.-ligand, L' is a .pi.-ligand, T is a bridge between L and L', M is a tetravalent transition metal, m is 1 or 2 and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are, independently of one another, identical or different and are each a hydrogen atom or a C.sub.1 -C.sub.20 -hydrocarbon radical.Type: GrantFiled: June 4, 1998Date of Patent: February 1, 2000Assignees: Hoechst AG, Mitsui Petrochemical Ind., Ltd.Inventors: Michael Riedel, Thomas Weller, Alexandra Jacobs
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Patent number: 6008298Abstract: Polymer alloy comprising a) one or more cycloolefin copolymers and b) one or more types of core/shell particles having a diameter of 0.01 to 0.7 micrometer.Type: GrantFiled: January 22, 1998Date of Patent: December 28, 1999Assignees: Hoechst Aktiengesellschaft, Mitsui Petrochemical Ind., Ltd.Inventors: Wilfried Hatke, Frank Osan, Otto Herrmann-Schonherr
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Patent number: 5150922Abstract: The improved electrofusion joint and header for supplying hot water that perform satisfactorily at elevated temperatures as evidenced by high heat resistance, that exhibit good sealing property and that can be handled efficiently in mounting and various other operations have a crosslinked thermoplastic resin layer and at least one joining portion which comprises a non-crosslinked thermoplastic resin layer that is formed a as an integral part of said crosslinked thermoplastic resin layer in the area where it contacts a tubular member to be joined, and a heating electric wire provided either within or on the outer or inner surface of said non-crosslinked thermoplastic resin layer. Such electrofusion joint and header are applicable to any part of a piping system for supplying hot water and they will withstand use for a prolonged period.Type: GrantFiled: January 9, 1990Date of Patent: September 29, 1992Assignees: Osaka Gas Co., Ltd., Mitsui Petrochemical Ind., Ltd., Shinwa Sangyo Co., Ltd.Inventors: Akio Nakashiba, Hiroyuki Nishimura, Fumio Nagatani, Kazunori Mito, Toshio Shibabuchi, Mikio Nakaoka
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Patent number: 4966929Abstract: Disclosed is a damping member comprising, as main components, a petroleum resin, asphalt and mica. By selecting and using mica as the filler and incorporating mica in an amount smaller than the amount of asphalt, the adhesion follow-up property to a substrate can be improved.This damping material can be attached simply and assuredly to a substrate having a curved surface, such as a tube or pipe, an air-conditioning duct or a part of a building or vehicle by heat-pressing or heat-fusion-bonding, and a product having an excellent damping effect is provided.Type: GrantFiled: July 18, 1989Date of Patent: October 30, 1990Assignees: Mitsui Petrochemical Ind., Ltd., NEC Environment Engineering, Ltd.Inventors: Toru Tomoshige, Yasumasa Fujii, Youhei Suzuki, Kenji Yokoyama, Yoshio Iida
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Patent number: 4675444Abstract: A process for producing an aminophenol, which comprises(A) a step of reacting a dihydric phenol with an aminating reagent in the liquid state under heat in the presence of water and a water-soluble catalyst,(B) a step of removing the unreacted aminating reagent from the reaction mixture, and then precipitating the crude aminophenol from the reaction mixture from which the aminating reagent has been removed, thereby to obtain a crystallization mixture containing the crude aminophenol,(C) a step of separating the crystallization mixture into crystals of the crude aminophenol and the reaction mother liquor containing the catalyst,(D) a step of circulating part or the whole of the reaction mother liquor to the aminating step, and(E) a step of washing the crude aminophenol crystals with a washing liquor to obtain the washed crude aminophenol crystals and the washing mother liquor, and thereafter separating the aminophenol from the washed crude aminophenol crystals and purifying it.Type: GrantFiled: November 25, 1985Date of Patent: June 23, 1987Assignees: Mitsui Petrochemical Ind., Ltd., Honshu Chemical Ind. Co., Ltd.Inventors: Fujihisa Matsunaga, Eiji Kato, Tsuyoshi Kimura, Yoichiro Isota