中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

10 records (took 0.022 seconds)

    PRODUCTION OF POLYBUTYLENE TEREPHTHALATE
    2.
    发明专利
    PRODUCTION OF POLYBUTYLENE TEREPHTHALATE 失效

    公开(公告)号：JPH0782355A

    公开(公告)日：1995-03-28

    申请号：JP25090893

    申请日：1993-09-14

    Applicant: TORAY INDUSTRIES

    Inventor： KAMATA KATSUMA ,  HAMADA SUSUMU ,  ITO SHIN

    IPC: C08G63/183 ,  C08G63/181 ,  C08G63/78 ,  C08G63/82 ,  C08G63/85

    Abstract: PURPOSE:To provide a process for producing a polybutylene terephthalate by using an organotitanium compound catalyst, wherein a catalyst solution stable for a long time is used as the catalyst and whereby the production cost can be reduced and the quality of the product can be improved. CONSTITUTION:A process for producing a polybutylene terephthalate by using an organotitanium compound catalyst, comprises performing the esterification reaction and the polymerization reaction in the presence of the catalyst prepared by adding a hindered phenol compound and oxalic acid to a solution of an organotitanium compound.

    DEPOLYMERIZATION OF POLYBUTYLENE TEREPHTHALATE POLYMER
    3.
    发明专利
    DEPOLYMERIZATION OF POLYBUTYLENE TEREPHTHALATE POLYMER 失效

    公开(公告)号：JPS62225526A

    公开(公告)日：1987-10-03

    申请号：JP6848386

    申请日：1986-03-28

    Applicant: TORAY INDUSTRIES

    Inventor： HAMADA SUSUMU ,  UMEDA AKIRA ,  IIDA HIROSHI ,  MATSUKI TOMIJI

    IPC: C08G63/91

    Abstract: PURPOSE:To carry out depolymerization of a polymer to monomers which can be regenerated to a polymer having high polymerization degree and excellent transparency by repolymerization, by adding butanediol to a polybutylene terephthalate polymerized in the presence of a specific catalyst and heating the mixture under reduced pressure. CONSTITUTION:(A) A polybutylene terephthalate produced by the polymerization of a dicarboxylic acid component composed mainly of terephthalic acid and a glycol component composed mainly of 1,4-butanediol in the presence of an organic titanium compound of formula (R is alkyl, etc.) (e.g. tetramethyl titanate) is depolymerized by adding (B) preferably 0.2-2.0mol of 1,4-butanediol (based of 1mol of the dicarboxylic acid of the component A) and heating the mixture e.g. at 210-250 deg.C under a pressure of

    PRODUCTION OF 1,4-BUTANEDIOL POLYESTER
    5.
    发明专利
    PRODUCTION OF 1,4-BUTANEDIOL POLYESTER 失效

    公开(公告)号：JPS62225522A

    公开(公告)日：1987-10-03

    申请号：JP6848486

    申请日：1986-03-28

    Applicant: TORAY INDUSTRIES

    Inventor： UMEDA AKIRA ,  HAMADA SUSUMU ,  AZUMA KUNIHIRO

    IPC: C08G63/82

    Abstract: PURPOSE:To obtain the titled polymer having excellent moldability, etc., by carrying out esterification reaction in the presence of an organic Sn compound catalyst and adding a polycondensation reaction catalyst to the reaction system under a specific condition, thereby remarkably decreasing the content of minute foreign materials originated from the organic Sn compound in the polymer. CONSTITUTION:A dicarboxylic acid component composed mainly of terephthalic acid and a diol component composed mainly of 1,4-butanediol are subjected to esterification reaction in the presence of an organotin compound (e.g. butyltin hydroxyoxide) as an esterification reaction catalyst. After the completion of the esterification reaction, a polycondensation reaction catalyst (e.g. tetraethyl titanate) is added to the reaction system under agitation at a circumferential speed of >=4m/sec, preferably >=5m/sec to effect the polycondensation reaction and obtain the objective polymer. The above polycondensation reaction catalyst is preferably added to the system in the form of a diol solution, etc.

    RECOVERY OF BY-PRODUCT TETRAHYDROFURAN
    6.
    发明专利
    RECOVERY OF BY-PRODUCT TETRAHYDROFURAN 失效

    公开(公告)号：JPS57135828A

    公开(公告)日：1982-08-21

    申请号：JP2090181

    申请日：1981-02-17

    Applicant: TORAY INDUSTRIES

    Inventor： HAMADA SUSUMU ,  AJIKI AKIMASA ,  HARADA HIROYUKI ,  SATOU TSUTOMU

    IPC: C07D307/08 ,  C07D307/06 ,  C08G63/00 ,  C08G63/88 ,  C08J11/00

    Abstract: PURPOSE:To reduce loss in resources and load in waste water disposal stage, by vaporizing tetrahydrofuran in waste water discharged from steam ejectors in a polyester condensation reaction. CONSTITUTION:A polycondensation reaction apparatus for polyester produced by using butanediol-1,4 as a component of starting materials, is kept at a predetermined degree of vacuum by steam ejectors 2, 3, 4, 5, 6 driven by steam 1. Steam drain, cooling water, tetrahydrofuran, etc. are condensed by condensers 7, 8 and discharged as waste water to a hot well 11. The temperature of waste water within the hot wall 11 is kept at 64-98 deg.C to vaporize tetrahydrofuran having a b.p. of 64-65 deg.C. The vaporized tetrahydrofuran is supplied through a vent pipe 14 to a condenser 15 where tetrahydrofuran is condensed. Tetrahydrofuran is once stored in a reservoir 16, and then fed to a tetrahydrofuran purifier.

    PRODUCTION OF POLYBUTRYLENE TEREPHTHALATE POLYMER
    7.
    发明专利
    PRODUCTION OF POLYBUTRYLENE TEREPHTHALATE POLYMER 失效

    公开(公告)号：JPH03153731A

    公开(公告)日：1991-07-01

    申请号：JP29440089

    申请日：1989-11-13

    Applicant: TORAY INDUSTRIES

    Inventor： TAMURA MICHIO ,  HAMADA SUSUMU ,  OGAWA TATSURO

    IPC: C08G63/78 ,  C08G63/82 ,  C08G63/85

    Abstract: PURPOSE:To produce the title high quality polymer within a shortened reaction time while preventing the inactivation and insolubilization of an organotitanium compound catalyst by adding a hindered phenolic compound as a stabilizer to a solution of the catalyst. CONSTITUTION:A process for producing a polybutylene terephthalate by using terephthalic acid or its derivative and 1,4-butanediol as the principal materials, wherein a hindered phenolic compound, e.g. pentaerithritol tetrakis[3-(3,5-di-t- butyl-4hydroxyphenyl)propionate], is added to a solution of an organotitanium compound used as a reaction catalyst. The stability of the catalyst solution can be markedly improved, and a large amount of the solution can be prepared at once. The organotitanium compound catalyst can be prevented from being inactivated and insolubilized by hydrolysis, so that the reaction time can be shortened and the quality of the formed polymer can be markedly improved in the production of the title polymer.

    PRODUCTION OF POLYESTER/POLYETHER COPOLYMER
    8.
    发明专利
    PRODUCTION OF POLYESTER/POLYETHER COPOLYMER 失效

    公开(公告)号：JPH03153730A

    公开(公告)日：1991-07-01

    申请号：JP29440189

    申请日：1989-11-13

    Applicant: TORAY INDUSTRIES

    Inventor： HAMADA SUSUMU ,  TAMURA MICHIO ,  OGAWA TATSURO

    IPC: C08G63/78 ,  C08G63/66 ,  C08G63/85

    Abstract: PURPOSE:To prevent the formation of tetrahydrofuran as a by-product and to shorten the reaction time by performing the esterification reaction of a dicarboxylic acid component with a glycol component and a polyalkylene glycol in the presence of a polyester/polyether copolymer and a specified reaction catalyst. CONSTITUTION:The esterification reaction of a dicarboxylic acid component based on terephthalic acid with a glycol component based on 1,4-butanediol and a polyalkylene glycol is performed in the presence of a polyester/polyether copolymer and an organotitanium compound and/or an organotin compound, and the formed ester is polycondensed. The polyester/polyether copolymer added in the above reaction is a polymer obtained from terephthalic acid, 1,4butanediol and a polyalkylene glycol by a well-known method, and when the above production process is continuously performed, the polymer formed in situ can be applied.

Patent Agency Ranking