Method for producing a polyester containing at least one 1,4:3,6-dianhydrohexitol unit with improved colouring

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United States of America Patent

PATENT NO 10400062
APP PUB NO 20170335055A1
SERIAL NO

15522726

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Abstract

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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.

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Patent Owner(s)

  • ROQUETTE FRERES

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fenouillot-Rimlinger, Françoise I'Isle d'abeau, FR 2 5
Jacquel, Nicolas Lambersart, FR 26 22
Pascault, Jean-Pierre Villeurbanne, FR 33 180
Rousseau, Alain Saint-Priest, FR 64 621
Saint-Loup, René Lomme, FR 40 33

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