Patents by Inventor Francis Petrocelli

Francis Petrocelli 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).

  • Shear thinning vinyl acetate based polymer latex composition, especially for adhesives
    Patent number: 6794466
    Abstract: The present invention elates to a vinyl acetate based polymer latex composition obtained by emulsion polymerization of: (a) polyvinyl alcohol, (c) a monomer mixture comprising vinyl acetate, and (d) optionally one or more additional co-monomer(s), in presence of (c) 0.0001-0.05 wt. % of a chain transfer agent, based on total monomer weight, said vinyl acetate based polymer latex composition having a weight average particle size ≧400 nm and a higher shear thinning factor than the vinyl acetate based polymer latex composition (a), (b) and (d) obtained in the absence of the chain transfer agent (c). According to one embodiment, emulsion polymerization is carried out in presence of 0.001 to 0.05 wt. % of a chain transfer agent selected from the group consisting of aldehydes and chain transfer agents having a similar chain transfer constant with regard to vinyl acetate as the monomer. According to another embodiment, emulsion polymerization is carried out in presence of 0.0001 to 0.01 wt.
    Type: Grant
    Filed: October 19, 2001
    Date of Patent: September 21, 2004
    Assignee: Air Products Polymers, L.P.
    Inventors: Helmut Zecha, Rudolf Weissgerber, Francis Petrocelli
  • Shear thinning vinyl acetate based polymer latex composition, especially for adhesives
    Publication number: 20030109620
    Abstract: The present invention elates to a vinyl acetate based polymer latex composition obtained by emulsion polymerization of:
    Type: Application
    Filed: October 19, 2001
    Publication date: June 12, 2003
    Inventors: Helmut Zecha, Rudolf Weissgerber, Francis Petrocelli