Patents by Inventor Tsuyoshi Isozaki
Tsuyoshi Isozaki 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: 11970607Abstract: To provide a polyacetal resin composition and a molded article thereof, which are less likely to crack even if stressed in contact with any hydrochloric acid-containing liquid. The polyacetal resin composition contains, per 100 parts by mass of a polyacetal resin: 0.01 to 10 parts by mass of at least one fatty acid metal salt selected from 1) to 3) below; and 0.1 to 5 parts by mass of a stress relaxant having a melting point of 67.5° C. to 200° C. when measured by using a differential scanning calorimeter at a flow rate of nitrogen of 20 cm3/min and at a heating rate of 10° C./min. 1) metal salt formed of long chain fatty acid having 10 to 34 carbon atoms and calcium; 2) metal salt formed of long chain fatty acid having 10 to 34 carbon atoms and zinc; and, 3) metal salt formed of long chain fatty acid having 10 to 34 carbon atoms and magnesium.Type: GrantFiled: July 9, 2019Date of Patent: April 30, 2024Assignee: GLOBAL POLYACETAL CO., LTD.Inventors: Takashi Ishii, Tsuyoshi Isozaki
-
Publication number: 20210269634Abstract: To provide a polyacetal resin composition and a molded article thereof, which are less likely to crack even if stressed in contact with any hydrochloric acid-containing liquid. The polyacetal resin composition contains, per 100 parts by mass of a polyacetal resin: 0.01 to 10 parts by mass of at least one fatty acid metal salt selected from 1) to 3) below; and 0.1 to 5 parts by mass of a stress relaxant having a melting point of 67.5° C. to 200° C. when measured by using a differential scanning calorimeter at a flow rate of nitrogen of 20 cm3/min and at a heating rate of 10° C./min.Type: ApplicationFiled: July 9, 2019Publication date: September 2, 2021Applicant: MITSUBISHI ENGINEERING-PLASTICS CORPORATIONInventors: Takashi ISHII, Tsuyoshi ISOZAKI
-
Publication number: 20130261260Abstract: There is provided a thermosetting resin composition having excellent flowability, low temperature moldability, curability, and heat resistance after curing or the like in the absence of a solvent. The thermosetting resin composition of the present invention contains, as essential components, a maleimide compound (A), a compound (B) having two or more polymerizable unsaturated hydrocarbon groups in its molecule, and a cyanate ester compound (C).Type: ApplicationFiled: October 24, 2011Publication date: October 3, 2013Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventor: Tsuyoshi Isozaki
-
Patent number: 7056585Abstract: A prepreg comprising a thermosetting resin (D) composition containing, as an essential component, an aluminum hydroxide-boehmite composite (A) obtained by hydrothermal treatment of aluminum hydroxide, and a substrate (I), a laminate using the above prepreg, and a metal-foil-clad laminate using the above laminate.Type: GrantFiled: July 25, 2003Date of Patent: June 6, 2006Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Hiroyuki Mishima, Tsuyoshi Isozaki, Hidenori Kimbara, Norio Nagai
-
Publication number: 20040166324Abstract: A prepreg comprising a thermosetting resin (D) composition containing, as an essential component, an aluminum hydroxide-boehmite composite (A) obtained by hydrothermal treatment of aluminum hydroxide, and a substrate (I), a laminate using the above prepreg, and a metal-foil-clad laminate using the above laminate.Type: ApplicationFiled: July 25, 2003Publication date: August 26, 2004Inventors: Hiroyuki Mishima, Tsuyoshi Isozaki, Hidenori Kimbara, Norio Nagai
-
Patent number: 6770703Abstract: A process for the preparation of a powder coating composition, wherein 5-90% by weight of at least one monomeric compound selected from glycidyl group-containing unsaturated compounds and methylglycidyl group-containing unsaturated compounds is copolymerized with 95-10% by weight of an ethylenically unsaturated monomer in methanol to obtain a resin solution. The resin solution is spray-dried to obtain a powdery resin. Alternatively, the resin solution is fed to an extruder having a die and a plurality of vent ports and extruded through the die, while removing volatile matters through the vent ports, to obtain extrudates. The extrudates are pulverized to obtain a powdery resin.Type: GrantFiled: June 15, 2001Date of Patent: August 3, 2004Assignee: Mitsubishi Gas Chemical CompanyInventors: Tsuyoshi Isozaki, Masahiro Kurokawa
-
Publication number: 20010042933Abstract: A process for the preparation of a powder coating composition, wherein 5-90% by weight of at least one monomeric compound selected from glycidyl group-containing unsaturated compounds and methylglycidyl group-containing unsaturated compounds is copolymerized with 95-10% by weight of an ethylenically unsaturated monomer in methanol to obtain a resin solution. The resin solution is spray-dried to obtain a powdery resin. Alternatively, the resin solution is fed to an extruder having a die and a plurality of vent ports and extruded through the die, while removing volatile matters through the vent ports, to obtain extrudates. The extrudates are pulverized to obtain a powdery resin.Type: ApplicationFiled: June 15, 2001Publication date: November 22, 2001Inventors: Tsuyoshi Isozaki, Masahiro Kurokawa
-
Patent number: 6309572Abstract: A process for the preparation of a powder coating composition, wherein 5-90% by weight of at least one monomeric compound selected from glycidyl group-containing unsaturated compounds and methylglycidyl group-containing unsaturated compounds is copolymerized with 95-10% by weight of an ethylenically unsaturated monomer in methanol to obtain a resin solution. The resin solution is spray-dried to obtain a powdery resin. Alternatively, the resin solution is fed to an extruder having a die and a plurality of vent ports and extruded through the die, while removing volatile matters through the vent ports, to obtain extrudates. The extrudates are pulverized to obtain a powdery resin.Type: GrantFiled: May 24, 1999Date of Patent: October 30, 2001Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Tsuyoshi Isozaki, Masahiro Kurokawa
-
Patent number: 5750739Abstract: There is disclosed a process for producing a glycidyl ester of acrylic acid or methacrylic acid which comprises the steps of neutralizing acrylic acid or methacrylic acid with a carbonate or a bicarbonate of an alkali metal in an excess amount of epichlorohydrin while an oxygen-containing gas is blown into the liquid reaction system; subjecting water formed by the neutralization and epichlorohydrin to azeotropic distillation to discharge them outside the reaction system and to form an alkali metal salt of acrylic acid or methacrylic acid; adding a quaternary ammonium salt as a catalyst to the reaction system to react the alkali metal salt of the acid with the epichlorohydrin and thus synthesize the glycidyl ester of the acid; cooling the liquid reaction product while recovering part of the excess epichlorohydrin under reduced pressure; adding aqueous solution of an alkali hydroxide to the liquid reaction product to separate into aqueous layer and organic layer; adding a catalyst deactivator to the organic phaType: GrantFiled: August 7, 1996Date of Patent: May 12, 1998Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Tsuyoshi Isozaki, Masahiro Kurokawa, Akihiro Honma
-
Patent number: 5527927Abstract: There are disclosed a process for producing glycidyl acrylate or glycidyl methacrylate by the transesterification of glycidol and methyl methacrylate, etc. which process comprises carrying out the transesterification in the presence of a polymerization inhibitor by using, as a catalyst, a quaternary ammonium salt represented by the general formula (I) or a quaternary phosphonium salt represented by the general formula (II)(R.sup.1 R.sup.2 R.sup.3 R.sup.4)NX (I)(R.sup.1 R.sup.2 R.sup.3 R.sup.4)PX (II)wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each an alkyl group having 1 to 20 carbon atoms, or the like, and X is a cyanide ion, cyanate ion or the like to complete the reaction; thereafter arresting the reaction by adding a catalyst deactivator represented by the general formula (III)SB (iii)wherein S is a sulfonic acid or a heteropolyacid and B is an alkali metal excluding potassium or an alkaline earth metal; and distilling away unreacted methyl methacrylate, etc.Type: GrantFiled: May 10, 1995Date of Patent: June 18, 1996Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Masahiro Kurokawa, Akihiro Honma, Tsuyoshi Isozaki
-
Patent number: 5182392Abstract: A process for producing a bistrimellitic imide of the formula (2) ##STR1## wherein X is an aliphatic group having at least 2 carbon atoms, an alicyclic group or an aromatic group,which comprises reacting a trimellitic anhydride with a diamine of the formula (1)H.sub.2 N--X--NH.sub.2 (1)wherein X is as defined above, in the presence of a solvent mixture containing an aprotic polar solvent and an aromatic hydrocarbon solvent which can be distilled azeotropically with water, the amount of the aromatic hydrocarbon solvent being 10 to 90% by weight based on the total weight of these two solvents.Type: GrantFiled: November 14, 1991Date of Patent: January 26, 1993Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Hiroka Tanisake, Takeshi Koyama, Tsuyoshi Isozaki