Patents by Inventor Tsutomu Isaka
Tsutomu Isaka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 4689369Abstract: A silane-crosslinkable copolymer composition comprising:(A) 100 parts by weight of a copolymer prepared by radically polymerizing a polymerizable monomeric mixture consisting essentially of ethylene and an ethylenically unsaturated silane compound having a hydrolyzable organic group under a high pressure, and containing said silane compound in an amount of from 0.1 to 5 wt %;(B) from 0.001 to 10 parts by weight of a silanol condensation catalyst; and(C) from 0.01 to 5 parts by weight of a silane compound having a hydrolyzable organic group.Type: GrantFiled: February 5, 1986Date of Patent: August 25, 1987Assignee: Mitsubishi Petrochemical Co., Ltd.Inventors: Iwao Ishino, Akihiko Ohno, Tsutomu Isaka
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Patent number: 4563316Abstract: A process for enhancing the adhesion of the surface of a polyolefin shaped product which comprises applying corona discharge the said surface under the continuous movement between an electrode for discharge and another electrode opposite thereto while jetting a gaseous material other than the air itself onto the part of the said surface to which corona discharge is applied so as to achieve the following relationships among the carbon atoms, the nitrogen atoms and the oxygen atoms present within 100 .ANG. from the said surface:(a) -3.5.ltoreq.([O]/[C]-[O']/[C'])/([N]/[C]-[N']/[C']).ltoreq.1.8(b) 3.0.ltoreq.[N']/[C']wherein [C], [N] and [O] are respectively the numbers of the carbon atoms, the nitrogen atoms and the oxygen atoms within 100 .ANG. from the said surface before the application and [C'], [N'] and [O'] are respectively the numbers of the carbon atoms, the nitrogen atoms and the oxygen atoms within 100 .ANG.Type: GrantFiled: October 7, 1983Date of Patent: January 7, 1986Assignee: Toyo Boseki Kabushiki KaishaInventors: Tsutomu Isaka, Hiroshi Nagano
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Patent number: 4456704Abstract: A method for producing cross-linked polyethylene resin foams which comprises mixing a polyolefin resin, a blowing agent and, optionally, a surface active agent containing hydroxyl groups or an acid amide compound under pressure, said polyolefin resin containing a cross-linkable ethylene polymer having on the side chains thereof silyl groups which effect cross-linking upon contact with water; extruding the mixture into a low pressure zone where the extrudate is allowed to expand; and bringing the expanded extrudate into contact with a silanol condensing catalyst so that the expanded extrudate is cross-linked on contact with water.Type: GrantFiled: October 8, 1982Date of Patent: June 26, 1984Assignee: Sekisui Kaseihin Kogyo Kabushiki KaishaInventors: Mikio Fukumura, Hideo Shibata, Shuhei Doi, Tsutomu Isaka, Takayuki Inoue
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Patent number: 4446283Abstract: A novel crosslinkable polyethylene resin composition which can be readily crosslinked rapidly is provided. The composition comprises a copolymer consisting essentially of ethylene and a specific unsaturated silane compound having a (meth)acrylate group as a copolymerizable group and a methoxy group as a hydrolyzable group, and an effective amount of a silanol condensation catalyst.Type: GrantFiled: June 9, 1982Date of Patent: May 1, 1984Assignee: Mitsubishi Petrochemical Company LimitedInventors: Shuhei Doi, Tsutomu Isaka, Shinichiro Iida
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Patent number: 4413066Abstract: A crosslinkable polyethylene resin composition comprises, basically, (A) a copolymer of ethylene and an ethylenically unsaturated silane compound, wherein the content of the ethylenically unsaturated silane compound unit is 0.001 to 15 percent by weight, and (B) a silanol condensation. The copolymer may further comprise a monomer copolymerizable with the ethylene and the ethylenically unsaturated silane compound. The composition may be expandable, further comprising a foaming agent and may further comprise a polyolefin and a filler and may be in the form of a film or sheet.Type: GrantFiled: February 18, 1981Date of Patent: November 1, 1983Assignee: Mitsubishi Petrochemical Company, Ltd.Inventors: Tsutomu Isaka, Mitsugu Ishioka, Takeo Shimada, Takayuki Inoue
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Patent number: 4397981Abstract: A novel flame-retardant ethylene polymer composition comprising a copolymer consisting essentially of ethylene and an olefinically unsaturated silane compound such as vinyltriethoxysilane, a silanol condensation catalyst such as dibutyltin dilaurate, and a flame retardant such as a chlorinated polyethylene.Type: GrantFiled: December 17, 1980Date of Patent: August 9, 1983Assignee: Mitsubishi Petrochemical Company LimitedInventors: Shuhei Doi, Tsutomu Isaka
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Patent number: 4351876Abstract: A laminate film or sheet of crosslinked polyethylene resin has as an outer layer a resin layer comprising a copolymer of ethylene and an ethylenically unsaturated silane compound which has been crosslinked by the contact thereof with moisture and has a gel content of 5 percent or more, and possesses excellent processing stability during its lamination, almost no odor, and, simultaneously, heat resistance and heat sealability.Type: GrantFiled: December 17, 1980Date of Patent: September 28, 1982Assignee: Mitsubishi Petrochemical Company LimitedInventors: Shuhei Doi, Tsutomu Isaka, Shinichiro Iida
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Patent number: 4343852Abstract: A packaging material which is capable of packaging an article(s) in a closely fitted and tightly sealed state and consists essentially of a composite film stretched at least in one direction,said composite film comprising a base film and a surface film provided on at least one surface of the base film and having certain specific shrinkage characteristics,said base film being made of a resin composition comprising a propylene polymer, andsaid surface film being made of a polymer composition comprising at least two of (A) a copolymer of propylene and ethylene in a weight proportion of 99.5:0.5 to 90:10, (B) a copolymer of propylene and an .alpha.-olefin having 4 to 10 carbon atoms in a weight proportion of 70:30 to 95:5 and (C) a copolymer of butene and any other .alpha.-olefin having 2 to 10 carbon atoms in a weight proportion of 70:30 to 99:1, each of the copolymers being in an amount of 10 to 90% by weight on the total weight of the copolymers.Type: GrantFiled: July 14, 1980Date of Patent: August 10, 1982Assignee: Toyo Boseki Kabushiki KaishaInventors: Tsutomu Isaka, Kazuyoshi Ohashi, Yukinobu Miyazaki
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Patent number: 4297310Abstract: A conductor wire is extrusion coated with a polyethylene resin containing a copolymer comprising predominantly ethylene and an unsaturated silane compound having the formula R Si R'.sub.n Y.sub.3-n, wherein: R is an ethylenically unsaturated hydrocarbyl group or hydrocarbyloxy group; R' is an aliphatic saturated hydrocarbyl group; Y is a hydrolyzable organic group; and n is zero, 1, or 2, thereby to fabricate a coated wire which is then caused to contact water in the presence of a silanol condensation catalyst in a crosslinking process step.Type: GrantFiled: November 13, 1979Date of Patent: October 27, 1981Assignee: Mitsubishi Petrochemical Co., Ltd.Inventors: Susumu Akutsu, Tsutomu Isaka, Mitsugu Ishioka
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Patent number: 4293608Abstract: A heat sealable packaging material comprising (A) a stretched base layer formed of a propylene polymer and (B) a stretched surface layer formed of a blend of a propylene-ethylene copolymer and a C.sub.4 -C.sub.10 .alpha.-olefin-propylene copolymer in a weight proportion of 20:80 to 94:6 by weight on at least one surface of said base layer.Type: GrantFiled: October 15, 1979Date of Patent: October 6, 1981Assignee: Toyo Baseki Kabushiki KaishaInventors: Tsutomu Isaka, Saburoh Kumada
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Patent number: 4264667Abstract: A transparent polyester film having excellent antistatic properties, which are little effected with variation of the humidity, and further having excellent flexing resistance, pinhole resistance and printability, which is made from a mixture comprising (i) a polyester consisting essentially of a residue of dibasic acids wherein at least 80% by mol is terephthalic acid and a residue of at least one glycol and (ii) a block copolyester consisting of a crystalline polyester segment having a high melting point and a soft polymer segment having a low melting point and a number average molecular weight of 400 to 8,000, said soft polymer segment having a low melting point being contained in an amount of 0.Type: GrantFiled: May 23, 1978Date of Patent: April 28, 1981Assignee: Toyo Boseki Kabushiki KaishaInventors: Tetsushi Murakami, Koichi Matsunami, Tsutomu Isaka, Yasutomi Yoshino, Yukinobu Miyazaki
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Patent number: 4230767Abstract: A packaging material having an excellent seal packaging property, which comprises (A) a base layer consisting of a stretched film made of a polymer composition comprising a propylene polymer and (B) a surface layer consisting of a stretched film made of a polymeric mixture comprising a polymer blend provided on at least one surface of said base layer, said polymer blend comprising a copolymer of ethylene and propylene and a copolymer of butene and any other polymerizable monomer having an ethylenic unsaturation in a weight proportion of 5:95 to 95:5.Type: GrantFiled: February 8, 1979Date of Patent: October 28, 1980Assignee: Toyo Boseki Kabushiki KaishaInventors: Tsutomu Isaka, Maki Matsuo, Yukinobu Miyazaki
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Patent number: 4070417Abstract: A transparent polyester film having excellent printability, flexing resistance and pinhole resistance and further excellent interlaminar strength, which is made from a polymer mixture or blend comprising (i) a polyester consisting essentially of a residue of dibasic acids wherein at least 80 % by mol is terephthalic acid and a residue of at least one glycol and (ii) a block copolyester consisting of a crystalline polyester (hard) segment having a high melting point and a soft polymer segment having a low melting point and a number average molecular weight of 400 to 8,000, said soft polymer segment having a low melting point being contained in an amount of 0.5 to 10 % by weight on the basis of the whole weight of the polymer mixture or blend, and said crystalline polyester segment having a melting point of at least 170.degree. C when a polymer is produced by the monomers composing the segment alone and said soft polymer segment having a melting or softening point of 100.degree. C or lower.Type: GrantFiled: December 18, 1975Date of Patent: January 24, 1978Assignee: Toyobo Co., Ltd.Inventors: Tsutomu Isaka, Hiroshi Nagano, Tetsushi Murakami, Koichi Matsunami, Yukio Yamane
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Patent number: 4045515Abstract: A film of excellent cutting property in the transverse direction which comprises a mixture of polypropylene and at least one ethylene polymer and satisfying the following requirements:1. Ny - Nx = 6 .times. 10.sup.-3 .about. 25 .times. 10.sup.-3 :Wherein Nx in the refractive index in the machine direction andNy is the refractive index in the transverse direction;2. (Nx + Ny) .times. 0.5 - Nz .ltoreq. 0.012:Wherein Nz is the refractive index in the vertical direction and Nx and Ny are each as defined above;3. break elongation in the machine direction = 150 .about. 800%; and4. no substantial necking is seen on the surface thereof.Type: GrantFiled: January 8, 1976Date of Patent: August 30, 1977Assignee: Toyo Boseki Kabushiki KaishaInventors: Tsutomu Isaka, Shuji Inoue, Kunihiko Arakawa
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Patent number: 3952073Abstract: A film of excellent cutting property in the transverse direction which comprises a mixture of polypropylene and at least one ethylene polymer and satisfying the following requirements:1. Ny - Nx = 6 .times. 10.sup.-.sup.3 .about. 25 .times. 10.sup.-.sup.3Wherein Nx is the refractive index in the machine direction and Ny is the refractive index in the transverse direction;2. (Nx + Ny) .times. 0.5 - Nz .ltoreq. 0.012Wherein Nz is the refractive index in the vertical direction and Nx and Ny are each as defined above;3. break elongation in the machine direction = 150 .about. 800 %; and4. no substantial necking is seen on the surface thereof.Type: GrantFiled: June 11, 1973Date of Patent: April 20, 1976Assignee: Toyo Boseki Kabushiki KaishaInventors: Tsutomu Isaka, Shuji Inoue, Kunihiko Arakawa