Patents by Inventor Yukitaka Goto

Yukitaka Goto 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).

  • Patent number: 6448356
    Abstract: An ethylene-&agr;-olefin copolymer which is a copolymer of ethylene with a C3-20 &agr;-olefin and which satisfies the following conditions (a) to (c): (a) the density (D) is from 0.850 to 0.950 g/cm3, (b) the relation between the melt tension (MT) and the melt flow rate (MFR) at 190° C. satisfies the following formula (1): log(MT)≧−0.91×log(MFR)+0.06   (1), and (c) the following three formulae (2), (3) and (4) are satisfied: Tmax≦972D−813   (2) logW60≦−0.114 Tmax+9.48   (3) logW90≧0.0394 Tmax−2.95   (4) where D is the density, Tmax is the elution peak temperature (°C.) by the cross fractionation measurement, W60 is the weight percentage (wt %) of a soluble content at 60° C. or lower, and W90 is the weight percentage (wt %) of a soluble content at 90° C. or higher.
    Type: Grant
    Filed: August 20, 2001
    Date of Patent: September 10, 2002
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Yumito Uehara, Yoshiyuki Ishihama, Yukitaka Goto
  • Publication number: 20020035227
    Abstract: An ethylene-&agr;-olefin copolymer which is a copolymer of ethylene with a C3-20 &agr;-olefin and which satisfies the following conditions (a) to (c):
    Type: Application
    Filed: August 20, 2001
    Publication date: March 21, 2002
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Yumito Uehara, Yoshiyuki Ishihama, Yukitaka Goto
  • Patent number: 5693719
    Abstract: An ethylene polymer which is useful for molding inflation film having a particularly excellent moldability is provided.The ethylene polymer is obtainable by the first and second steps and satisfying the following conditions (a) to (d):(a) the polymer produced in the first polymerization step having an weight average molecular weight (Mw,.sub.1) in the range of 6.times.10.sup.5 to 4.times.10.sup.6 ;(b) the ratio (Mw,.sub.2 /Mw,.sub.1) of the weight average molecular weight of the polymer produced in the first polymerization step (Mw,.sub.1) and the weight average molecular weight of the polymer produced in the second polymerization step (Mw,.sub.2) being in the range of 0.7 to 1.4;(c) the molecular weight in which the integration fraction from the low molecular weight is equal to 1/2 of the weight fraction (W.sub.2) of the polymer produced in the second polymerization step being in the range of 5.times.10.sup.3 to 3.times.10.sup.4 ; and(d) the weight fraction (W.sub.
    Type: Grant
    Filed: December 15, 1995
    Date of Patent: December 2, 1997
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Yukitaka Goto, Nobuaki Sakurai, Tadashi Takahashi, Katsumi Hirakawa, Yoichi Maeda, Yoshihiko Sasaki, Satoshi Nishimura, Masataka Souda
  • Patent number: 5374677
    Abstract: A thermoplastic polymer composition comprising: (i) 100 parts by weight of a thermoplastic polymer component which comprises an ethylene-propylene rubber, an ethylene copolymer and a propylene polymer (including an ethylene-propylene block copolymer), and (ii) 0 to 7 parts by weight of talc, the thermoplastic polymer component being composed of, according to fractionation using o-dichlorobenzene as a solvent, component (A) which is a component soluble in the solvent at 40.degree. C., component (B) which is a component insoluble in the solvent at 40.degree. C. but soluble at 110.degree. C., and component (C) which is a component insoluble in the solvent even at 110.degree. C. in such a proportion that the total amount of the components (A) and (B) is from 50 to 70 parts by weight, the weight ratio of the component (A) to the component (B) being from 0.5 to 1.5, and the amount of the component (C) is from 50 to 30 parts by weight.
    Type: Grant
    Filed: June 19, 1992
    Date of Patent: December 20, 1994
    Assignees: Mitsubishi Petrochemical Company Limited, Toyota Jidosha Kabushiki Kaisha
    Inventors: Takeyoshi Nishio, Takao Nomura, Nobuya Kawamura, Hiroki Sato, Akihiko Uchikawa, Ikuo Tsutsumi, Yukitaka Goto
  • Patent number: 5302653
    Abstract: A thermoplastic polymer composition comprising: (i) 100 parts by weight of a thermoplastic polymer component which comprises an ethylene-propylene rubber, an ethylene copolymer and a propylene polymer (including an ethylene-propylene block copolymer), and (ii) 7 to 25 parts by weight of talc, the thermoplastic polymer component being composed of, according to fractionation using o-dichlorobenzene as a solvent, component (A) which is a component soluble in the solvent at 40.degree. C., component (B) which is a component insoluble in the solvent at 40.degree. C. but soluble at 110.degree. C., and component (C) which is a component insoluble in the solvent even at 110.degree. C. in such a proportion that the total amount of the components (A) and (B) is from 50 to 70 parts by weight, the weight ratio of the component (A) to the component (B) being from 0.5 to 1.5, and the amount of the component (C) is from 50 to 30 parts by weight; the composition having a flexural modulus of 10,000 to 20,000 kg/cm.sup.2.
    Type: Grant
    Filed: January 24, 1992
    Date of Patent: April 12, 1994
    Assignees: Mitsubishi Petrochemical Company Limited, Toyota Jidosha Kabushiki Kaisha
    Inventors: Takeyoshi Nishio, Nobuya Kawamura, Takao Nomura, Hiroki Sato, Akihiko Uchikawa, Ikuo Tsutsumi, Yukitaka Goto
  • Patent number: 4992168
    Abstract: An apparatus for fractionally measuring a polymer comprising: a flow path change valve unit A having an inlet for pouring a sample polymer solution, a loop for metering the sample polymer solution, an internal standard solution pouring mechanism including a loop for metering the liquid and a valve for pouring the liquid, and a valve for changing the system flow path; a composition fractionation unit B which is provided with a column filled with a filler, and which permits the polymer dissolved in the sample polymer solution transferred from the loop for metering the sample polymer solution to precipitate on the filler, and then fractionally dissolves the polymer by stepwisely raising the temperature in the column; a molecular size fractionation unit C which is provided with a column filled with a filler, and which fractionates, depending upon the molecular size, the sample polymer fraction solution which has undergone composition fractionation in the unit B and which is batchwisely transferred therefrom; a so
    Type: Grant
    Filed: March 3, 1989
    Date of Patent: February 12, 1991
    Assignee: Mitsubishi Petrochemical Company Limited
    Inventors: Shigeru Takayama, Yukitaka Goto
  • Patent number: 3962157
    Abstract: A modified polyolefin composition having excellent physical properties such as bending rigidity, bending strength, impact strength, and the like can be prepared by melting and kneading a mixture of a radical generating agent such as benzoyl peroxide, a porous filler, and a polyolefin composed primarily of propylene and, if necessary, a polar vinyl monomer at a high temperature above the decomposition temperature of the radical generating agent.
    Type: Grant
    Filed: August 26, 1974
    Date of Patent: June 8, 1976
    Assignee: Mitsubishi Petrochemical Company Limited
    Inventors: Seikou Nakano, Yukitaka Goto, Takayuki Inoue