Patents by Inventor Franck Hubert

Franck Hubert has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for obtaining polyols and polyol thus obtained
    Patent number: 6573304
    Abstract: The invention relates to the field of polymer chemistry. It features a method for obtaining polyols consisting in a first step in reacting glycols, i.e. plurialcohols with a functionality at least equal to two (MEG,DEG,DPG, . . . ) on polyethyleneterephthalate (PET) in the presence of a transesterefication catalyst (CAT) (MEG,DEG,DPG; . . . ), on polyethyleneterephthalate (PET) in the presence of a glycolysis catalyst (CAT), then in a last step, comprises, in distilling the free glycols. The method is characterized in that a step subsequent to the first and prior to, or simultaneous with, the last step, comprises the glycolysis catalyst deactivation by a deactivating agent (DES). As an example, the glycolysis reaction catalyst (CAT) is one of the agents of the group comprising zinc acetate and manganese acetate, amines such as triethylamine and tributylamine, and the selected deactivating agent is phosphoric acid at 85%.
    Type: Grant
    Filed: October 15, 1999
    Date of Patent: June 3, 2003
    Assignee: Techniques du Batiment et de l'Industrie S.A.R.L.
    Inventors: Gérard Durand, Franck Hubert, Jean-Charles Marechal, Hélène Migeon, Gilles Tersac