Patents by Inventor Dhruv Vrajlal Parekh

Dhruv Vrajlal Parekh 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).

  • Reaction product of melamine aldehyde resin and diol
    Patent number: 8048970
    Abstract: Novel low viscosity oligomeric polyols and the use thereof in coating compositions are disclosed. The novel low viscosity oligomeric polyols may be prepared by reacting at least one melamine aldehyde resin and at least one of ?,?-diol, ?,?-diol, or mixture thereof. The reaction may occur in the presence of an acid catalyst. Coating compositions with a low VOC able to cure under ambient and forced dry conditions while providing good application and performance characteristics, such as an improved scratch resistance, are also disclosed.
    Type: Grant
    Filed: September 5, 2006
    Date of Patent: November 1, 2011
    Assignee: Akzo Nobel Coatings International B.V.
    Inventors: Alexander Leo Yahkind, Xueting Qiu, Dhruv Vrajlal Parekh
  • Melamine Polyols and Coatings Thereof
    Publication number: 20080207850
    Abstract: Novel low viscosity oligomeric polyols and the use thereof in coating compositions are disclosed. The novel low viscosity oligomeric polyols may be prepared by reacting at least one melamine aldehyde resin and at least one of ?,?-diol, ?,?-diol, or mixture thereof. The reaction may occur in the presence of an acid catalyst. Coating compositions with a low VOC able to cure under ambient and forced dry conditions while providing good application and performance characteristics, such as an improved scratch resistance, are also disclosed.
    Type: Application
    Filed: September 5, 2006
    Publication date: August 28, 2008
    Applicant: AKZO NOBEL COATINGS INTERNATIONAL B.V.
    Inventors: Alexander Leo Yahkind, Xueting Qiu, Dhruv Vrajlal Parekh
  • Polyurethane polyol compositions and coating compositions comprising the same
    Patent number: 6624277
    Abstract: The present invention relates to polyurethane polyol compositions comprising the reaction product of a polyisocyanate, a polyol, and a Guerbet alcohol having at least 12 carbon atoms or a Guerbet alcohol mixture having an average of at least 12 carbon atoms. Preferred polyols are &agr;,&bgr; diols and &agr;,&ggr; diols. The polyurethane polyol compositions exhibit very low viscosity and are particularly useful in very low VOC coating compositions. The resulting cured coating provides surprisingly improved properties.
    Type: Grant
    Filed: December 12, 2001
    Date of Patent: September 23, 2003
    Assignee: AKZO Nobel N.V.
    Inventors: Alexander Leo Yahkind, Robert Brian Feisel, Michael Todd Render, Dhruv Vrajlal Parekh
  • Polyurethane polyol compositions and coating compositions comprising the same
    Publication number: 20020123545
    Abstract: The present invention relates to polyurethane polyol compositions comprising the reaction product of a polyisocyanate, a polyol, and a Guerbet alcohol having at least 12 carbon atoms or a Guerbet alcohol mixture having an average of at least 12 carbon atoms. Preferred polyols are &agr;,&bgr; diols and &agr;,&ggr; diols. The polyurethane polyol compositions exhibit very low viscosity and are particularly useful in very low VOC coating compositions. The resulting cured coating provides surprisingly improved properties.
    Type: Application
    Filed: December 12, 2001
    Publication date: September 5, 2002
    Inventors: Alexander Leo Yahkind, Robert Brian Feisel, Michael Todd Render, Dhruv Vrajlal Parekh