Patents by Inventor Richard B. Du Vernet

Richard B. Du Vernet 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 rosin esterification in the presence of phosphinic acid and phenol sulfide and subsequent neutralization with a magnesium salt
    Patent number: 4725384
    Abstract: The treatment of a rosin ester prepared by reacting rosin and a polyhydric alcohol in the presence of a catalytic combination of phosphinic acid (also called hypophosphorous acid) and a phenol sulfide compound with a magnesium salt of an organic acid is disclosed to improve the clarity and viscosity stability of hot melt adhesives when used as a tackifier in the adhesive formulation. According to the process of the invention, a rosin is reacted with up to a 50% equivalent excess of the polyhydric alcohol in the presence of phosphinic acid and a phenol sulfide compound at a temperature of from about 180.degree. C. to about 300.degree. C. and the reaction product is treated subsequently with from 0.01% to 5.0% of a magnesium salt of an organic acid.
    Type: Grant
    Filed: November 17, 1986
    Date of Patent: February 16, 1988
    Assignee: Westvaco Corporation
    Inventor: Richard B. Du Vernet
  • C.sub.21 -Dicarboxylic acid isethionates as primary anionic surfactants
    Patent number: 4514335
    Abstract: Disclosed are novel water-soluble surfactants prepared by reacting 2-hydroxyethane sulfonate with C.sub.21 -dicarboxylic acid or a mixture of C.sub.21 -dicarboxylic acid and fatty acids wherein the C.sub.21 -dicarboxylic acid comprises at least 5% by weight of the mixture, the C.sub.21 -dicarboxylic acid having the formula ##STR1## wherein x and y are integers from 3 to 9, x and y together equal 12, Z is a member of the group consisting of hydrogen and COOH, with one Z of each moiety.
    Type: Grant
    Filed: September 16, 1983
    Date of Patent: April 30, 1985
    Assignee: Westvaco Corporation
    Inventor: Richard B. Du Vernet
  • C21-Dicarboxylic acid isethionates as primary anionic surfactants
    Patent number: 4476055
    Abstract: Disclosed are novel water-soluble surfactants prepared by reacting 2-hydroxyethane sulfonate with C.sub.21 -dicarboxylic acid or a mixture of C.sub.21 -dicarboxylic acid and fatty acids wherein the C.sub.21 -dicarboxylic acid comprises at least 5% by weight of the mixture, the C.sub.21 -dicarboxylic acid having the formula ##STR1## wherein x and y are integers from 3 to 9, x and y together equal 12, Z is a member of the group consisting of hydrogen and COOH, with one Z of each moiety.
    Type: Grant
    Filed: July 6, 1982
    Date of Patent: October 9, 1984
    Assignee: Westvaco Corporation
    Inventor: Richard B. Du Vernet