Patents by Inventor Yves Merck

Yves Merck 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).

  • One-step process for the preparation of carboxyl group-terminated polyesters
    Patent number: 4740580
    Abstract: The present invention provides a process for the preparation of carboxyl group-terminated polyesters, which comprises reacting in one step at elevated temperatures, terephthalic acid and at least one dihydric aliphatic compound and optionally an aromatic polycarboxylic acid having three or more carboxyl groups and/or a polyhydric organic compound having three or more hydroxyl groups and/or a linear aliphatic or cycloaliphatic dicarboxylic acid, the proportions by weight of the respective reactants being such as to produce a polyester having an acid number of from 10 to 25 mg KOH/g and a hydroxyl number of at most 5 mg KOH/g.
    Type: Grant
    Filed: April 14, 1987
    Date of Patent: April 26, 1988
    Assignee: U C B, S.A.
    Inventors: Yves Merck, Daniel Maetens, Jean-Marie Loutz