The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 05, 2002
Filed:
Nov. 28, 2000
George Roth, Homewood, IL (US);
George A. Smith, Newtown, PA (US);
Reuben Grinstein, Tucson, AZ (US);
Paul D. Whyzmuzis, late of Hatfield, PA (US);
Shruti Singhal, Conshohocken, PA (US);
Steve Boucher, Hatfield, PA (US);
Brenda Taipale, Harleysville, PA (US);
Roger Lovald, Lansdale, PA (US);
David Devore, Langhorne, PA (US);
James P. Yosh, Jr., Aurora, OH (US);
Stephen A. Fischer, Franklin, WI (US);
Michael S. Wiggins, Lansdale, PA (US);
Cook Composites & Polymers Co., North Kansas City, MO (US);
Abstract
Described is a process for making acrylic resins suitable as polymeric surfactants used in emulsion polymerization, as pigment grinding resins and for preparing dispersions used as overprint varnishes. The feedstock is styrene, &agr;-methyl styrene, acrylic acid and a polymerization initiator and is preferably free of solvent. This mix is passed through a continuous tube reactor run at a controlled range of pressure and relatively low residence time and temperature. Optimally, when the polymer/unreacted monomers blend exits the reactor and is devolatilized, the recovered monomers are used to make up part of the feedstock.