中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

15 records (took 0.014 seconds)

    Method for producing a polyester containing at least one 1,4:3,6-dianhydrohexitol unit with improved colouring
    2.
    发明授权
    Method for producing a polyester containing at least one 1,4:3,6-dianhydrohexitol unit with improved colouring 有权

    公开(公告)号：US10400062B2

    公开(公告)日：2019-09-03

    申请号：US15522726

    申请日：2015-10-28

    Applicant: Roquette Freres

    Inventor： Nicolas Jacquel ,  René Saint-Loup ,  Françoise Fenouillot-Rimlinger ,  Jean-Pierre Pascault ,  Alain Rousseau

    IPC: C08G63/02 ,  C08G63/54 ,  C08K3/22 ,  C08G63/672 ,  C08G63/84 ,  C08G63/86 ,  C08G63/127

    Abstract: The invention concerns a method for producing a polyester containing at least one 1,4:3,6-dianhydrohexitol unit comprising: •a step of introducing, into a reactor, monomers comprising at least one monomer (A) that is a diacid or a diester and at least one monomer (B) that is a 1,4:3,6-dianhydrohexitol; •a step of introducing, into the reactor, a catalytic system comprising either a catalyst comprising the element germanium and a catalyst comprising the element aluminum, or a catalyst comprising the elements germanium and aluminum, or a mixture of said two catalysts; •a step of polymerizing said monomers to form the polyester; •a step of recovering a polyester composition comprising the polyester and the catalytic system. The invention also concerns a polyester composition containing a catalytic system comprising either a catalyst comprising the element germanium and a catalyst comprising the element aluminum, or a catalyst comprising the elements germanium and aluminum, or a mixture of said two catalysts, and the use of same to reduce the coloring of the polyester.

    METHOD FOR CRYSTALLIZING A POLYESTER COMPRISING AT LEAST ONE 1,4:3,6-DIANHYDROHEXITOL UNIT
    7.
    发明申请
    METHOD FOR CRYSTALLIZING A POLYESTER COMPRISING AT LEAST ONE 1,4:3,6-DIANHYDROHEXITOL UNIT 有权

    公开(公告)号：US20220267514A1

    公开(公告)日：2022-08-25

    申请号：US17059948

    申请日：2019-05-29

    Applicant: ROQUETTE FRERES

    Inventor： Nicolas Jacquel ,  René Saint-Loup ,  Audrey Dausque ,  Sébastien Naudin ,  Nicolas Descamps

    IPC: C08G63/80 ,  C08G63/672

    Abstract: The invention relates to the field of polymers and concerns a method for the crystallization of polyester. More particularly, it relates to a crystallization method that comprises a step of providing a polyester comprising at least one 1,4:3,6-dianhydrohexitol unit, and a step of crystallizing said semi-crystalline polyester, said method being characterized in that the crystallization step is performed at a pressure of at least 600 mbar absolute. The method according to the invention makes it possible to strongly limit, or even eliminate, the phenomenon of polyester expansion during crystallization. Advantageously, the elimination of the expansion phenomenon through pressure conditions implemented according to the invention thus makes it possible to dispense with obtaining very fragile empty spheres that break when agitated and thus cause the formation of undesirable fine particles.

    Thermoplastic composite
    8.
    发明授权
    Thermoplastic composite 有权

    公开(公告)号：US11130860B2

    公开(公告)日：2021-09-28

    申请号：US16608986

    申请日：2018-05-07

    Applicant: ROQUETTE FRERES

    Inventor： Hélène Amedro ,  Jean-Marc Corpart ,  Nicolas Jacquel ,  René Saint-Loup

    IPC: C08L67/02 ,  C08J5/04 ,  C08J5/24

    Abstract: A thermoplastic composite comprising a thermoplastic polymer matrix comprising an amorphous polyester containing 1,4: 3,6-dianhydrohexitol units, an alicyclic diol and terephthalic acid, wherein diol component comprises 1,4:3,6-dianhydrohexitol and alicyclic diol in ratio from 0.32 to 0.75; and thermoplastic fibers comprising a semi-crystalline polyester containing 1,4: 3,6-dianhydrohexitol units, an alicyclic diol and terephthalic acid, wherein diol component comprises 1,4:3,6-dianhydrohexitol and alicyclic diol in ratio from 0.05 to 0.30 are disclosed. Methods for producing the polymer composite are also disclosed.

Patent Agency Ranking