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    2.
    发明专利
    未知

    公开(公告)号：DK464175A

    公开(公告)日：1976-04-17

    申请号：DK464175

    申请日：1975-10-15

    Applicant: BASF AG

    Inventor： REBHAN J ,  MATTHIES H G

    IPC: C08G63/00 ,  C07C69/82 ,  C08G63/78 ,  C08G

    Abstract: An improved process for the continuous manufacture of linear high molecular weight polyesters by direct esterification of terephthalic acid with excess glycols in a medium comprising terephthalic acid glycol esters or their oligomers, under superatmospheric pressure at temperatures above 200 DEG C, followed by polycondensation in the presence of catalysts at from 260 DEG to 290 DEG C. The improvement is that the mixture fed to the esterification contains terephthalic acid and glycols in the molar ratio of 1:1.15 to 1:1.5 and that during the esterification from 20 to 30% by weight of the excess of glycols over the molar ratio terephthalic acid: glycols = 1:1 are continuously distilled from the reaction mixture.

    3.
    发明专利
    未知

    公开(公告)号：SE415263B

    公开(公告)日：1980-09-22

    申请号：SE7511490

    申请日：1975-10-14

    Applicant: BASF AG

    Inventor： REBHAN J ,  MATTHIES H G

    IPC: C08G63/00 ,  C07C69/82 ,  C08G63/78 ,  C08G63/22

    Abstract: An improved process for the continuous manufacture of linear high molecular weight polyesters by direct esterification of terephthalic acid with excess glycols in a medium comprising terephthalic acid glycol esters or their oligomers, under superatmospheric pressure at temperatures above 200 DEG C, followed by polycondensation in the presence of catalysts at from 260 DEG to 290 DEG C. The improvement is that the mixture fed to the esterification contains terephthalic acid and glycols in the molar ratio of 1:1.15 to 1:1.5 and that during the esterification from 20 to 30% by weight of the excess of glycols over the molar ratio terephthalic acid: glycols = 1:1 are continuously distilled from the reaction mixture.

    5.
    发明专利
    未知

    公开(公告)号：DK269580A

    公开(公告)日：1980-12-26

    申请号：DK269580

    申请日：1980-06-24

    Applicant: BASF AG

    Inventor： NEUBERG R ,  MATTHIES H G ,  DRUSCHKE W

    IPC: C08G63/00 ,  C08G63/12 ,  C08G63/181 ,  C08G63/66 ,  C08G63/668 ,  C09J167/00 ,  C08G

    Abstract: Thermoplastic segmented elastomeric copolyether-esters which substantially consist of a plurality of recurring short-chain and long-chain ester units linked to one another by ester bonds, the proportion of the short-chain ester units of the formula I where R is the divalent radical remaining after removal of the carboxyl groups of aromatic dicarboxylic acids having a molecular weight of II where R is defined as above and B is the divalent radical remaining after removal of the terminal hydroxyl groups from a long-chain glycol, being from 25 to 85% by weight of the copolyester, and which contain from 0.01 to 5 mole %, based on copolyester, of trifunctional or more highly functional compounds, serving as branching agents, chemically incorporated into the polymer molecule. The copolyesters are particularly suitable for use in pressure-sensitive adhesives.

    8.
    发明专利
    未知

    公开(公告)号：SE7511490L

    公开(公告)日：1976-04-20

    申请号：SE7511490

    申请日：1975-10-14

    Applicant: BASF AG

    Inventor： REBHAN J ,  MATTHIES H G

    IPC: C08G63/00 ,  C07C69/82 ,  C08G63/78 ,  C08G63/22

    Abstract: An improved process for the continuous manufacture of linear high molecular weight polyesters by direct esterification of terephthalic acid with excess glycols in a medium comprising terephthalic acid glycol esters or their oligomers, under superatmospheric pressure at temperatures above 200 DEG C, followed by polycondensation in the presence of catalysts at from 260 DEG to 290 DEG C. The improvement is that the mixture fed to the esterification contains terephthalic acid and glycols in the molar ratio of 1:1.15 to 1:1.5 and that during the esterification from 20 to 30% by weight of the excess of glycols over the molar ratio terephthalic acid: glycols = 1:1 are continuously distilled from the reaction mixture.

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