Patents Assigned to The Central Synthetic Rubbers Research Institute
  • Adhesive composition
    Patent number: 5986038
    Abstract: An adhesive composition comprising a fluorinated elastomer having dicyclopropane rings formed by reaction of chloroform with unsaturated bonds introduced into the molecule of fluorinated elastomer by an alkali treatment, as an adhesive component has a good room temperature adhesiveness and very distinguished electric characteristics perse such as a high insulation resistance, a low dielectric constant, a low dielectric loss tangent, etc. and is effectively applied to adhesion of electronic materials in printed substrates, etc.
    Type: Grant
    Filed: March 5, 1998
    Date of Patent: November 16, 1999
    Assignees: Nippon Mektron, Limited, The Central Synthetic Rubbers Research Institute
    Inventors: Lin-chiu Chiang, Jenq-Tain Lin, Haruyoshi Tatsu, Lev Moiseevich Kogan, Anatoli Stepanovich Skornyakov, Tat'yana Borisovna Zapevalova, Olga Viktorinovna Blagodatova, Sergei Vasil'evich Sokolov
  • Fluorine-containing elastomer composition
    Patent number: 5767204
    Abstract: A fluorine-containing elastomer composition, which comprises a terpolymer of tetrafluoroethylene, perfluoro(lower alkyl vinyl ether) and a perfluoro unsaturated nitrile compound represented by the following general formula:CF.sub.2 .dbd.CFO(CF.sub.2)nOCF(CF.sub.3)CN,wherein n is an integer of 2 to 5, and a bis(aminophenyl) compound represented by the following general formula as a cross-linking agent: ##STR1## wherein A is an alkylidene group having 1 to 6 carbon atoms or a perfluoroalkylidene group having 1 to 10 carbon atoms and X and Y are a hydroxyl group or an amino group, can produce vulcanized products having good vulcanization physical properties and a.good compression set.
    Type: Grant
    Filed: October 16, 1995
    Date of Patent: June 16, 1998
    Assignees: Nippon Mektron Limited, The Central Synthetic Rubbers Research Institute
    Inventors: Riichi Iwa, Haruyoshi Tatsu, Volkova Margarita Alexeevna, Rondarev Dmitrii Stefanovich, Sokolov Sergey Vasilyevich, Greenblat Mark Peysakhovich, Senyushov Lev Nikolaevich
  • Perfluoro unsaturated nitrile compound and process for producing the same
    Patent number: 5736614
    Abstract: A perfluoro unsaturated nitrile compound represented by the following general formula:CF.sub.2 .dbd.CFO(CF.sub.2)nOCF(CF.sub.3)CNis produced by reaction of chlorine or bromine to a perfluoro unsaturated carboxylic acid ester represented by the following general formula:CF.sub.2 .dbd.CFO(CF.sub.2)nOCF(CF.sub.3)COORfollowed by reaction with ammonia, thereby converting the ester group to an acid amide group, and then conducting a dehydration reaction and a dehalogenation reaction of the resulting perfluoro unsaturated carboxylic acid amide represented by the following general formula:CF.sub.2 .dbd.CFO(CF.sub.2)nOCF(CF.sub.3)CONH.sub.2in any desired sequence, and is effectively applied as a cross-linking site monomer for fluorine-containing elastomers.
    Type: Grant
    Filed: October 18, 1996
    Date of Patent: April 7, 1998
    Assignees: Nippon Mektron Limited, The Central Synthetic Rubbers Research Institute
    Inventors: Satoru Saito, Riichi Iwa, Haruyoshi Tatsu, Rondarev Dmitrii Stefanovich, Sokolov Sergey Vasilyevich, Berenblit Vsevolod Vulfovich
  • Process for producing perfluoro unsaturated nitrile compounds
    Patent number: 5717037
    Abstract: A perfluoro unsaturated nitrile compound represented by the following general formula:CF.sub.2 .dbd.CFO(CF.sub.2)nOCF(CF.sub.3)CNis produced by reaction of chlorine or bromine to a perfluoro unsaturated carboxylic acid ester represented by the following general formula:CF.sub.2 .dbd.CFO(CF.sub.2)nOCF(CF.sub.3)COORfollowed by reaction with ammonia, thereby converting the ester group to an acid amide group, and then conducting a dehydration reaction and a dehalogenation reaction of the resulting perfluoro unsaturated carboxylic acid amide represented by the following general formula:CF.sub.2 .dbd.CFO(CF.sub.2)nOCF(CF.sub.3)CONH.sub.2in any desired sequence, and is effectively applied as a cross-linking site monomer for fluorine-containing elastomers.
    Type: Grant
    Filed: October 18, 1996
    Date of Patent: February 10, 1998
    Assignees: Nippon Mektron Limited, The Central Synthetic Rubbers Research Institute
    Inventors: Satoru Saito, Riichi Iwa, Haruyoshi Tatsu, Rondarev Dmitrii Stefanovich, Sokolov Sergey Vasilyevich, Berenblit Vsevolod Vulfovich
  • Fluorine-containing elastomer composition
    Patent number: 5700879
    Abstract: A fluorine-containing elastomer composition, which comprises a terpolymer of tetrafluoroethylene, perfluoro(lower alkyl vinyl ether) and cyano group-containing (perfluorovinylether) represented by the following general formula:CF.sub.2 .dbd.CF?OCF.sub.2 CF(CF.sub.3)!nCNwherein n is an integer of 1 to 5, and a bis(aminophenyl) compound represented by the following general formula as a cross-linking agent: ##STR1## , wherein A is, for example, an alkylidene group, and X and Y are a hydroxyl group or an amino group, can produce vulcanized products having a good heat resistance and good physical properties, and the bis(aminophenyl) compound has no problem as to its safety.
    Type: Grant
    Filed: October 16, 1995
    Date of Patent: December 23, 1997
    Assignees: The Central Synthetic Rubbers Research Institute, Nippon Mektron Limited
    Inventors: Yuichi Yamamoto, Haruyoshi Tatsu, Volkova Margarita Alexeevna, Sokolov Sergey Vasilyevich, Veretennikov Nikolai Vladimirovich
  • Perfluoro unsaturated nitrile compound and process for producing the same
    Patent number: 5679851
    Abstract: A perfluoro unsaturated nitrile compound represented by the following general formula:CF.sub.2 =CFO(CF.sub.2)nOCF(CF.sub.3)CNis produced by reaction of chlorine or bromine to a perfluoro unsaturated carboxylic acid ester represented by the following general formula:CF.sub.2 =CFO(CF.sub.2)nOCF(CF.sub.3)COORfollowed by reaction with ammonia, thereby converting the ester group to an acid amide group, and then conducting a dehydration reaction and a dehalogenation reaction of the resulting perfluoro unsaturated carboxylic acid amide represented by the following general formula:CF.sub.2 =CFO(CF.sub.2)nOCF(CF.sub.3)CONH.sub.2in any desired sequence, and is effectively applied as a cross-linking site monomer for fluorine-containing elastomers.
    Type: Grant
    Filed: October 18, 1996
    Date of Patent: October 21, 1997
    Assignees: Nippon Mektron Limited, The Central Synthetic Rubbers Research Institute
    Inventors: Satoru Saito, Riichi Iwa, Haruyoshi Tatsu, Rondarev Dmitrii Stefanovich, Sokolov Sergey Vasilyevich, Berenblit Vsevolod Vulfovich