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:
Jul. 03, 2001
Filed:
Jun. 29, 1999
Joseph J. Zupancic, Glen Ellyn, IL (US);
Jack C. Allman, Twin Lakes, WI (US);
James V. Lang, Harvard, IL (US);
BASF Corporation, Southfield, MI (US);
Abstract
The invention provides thermosetting coating compositions in which acrylic copolymers are used as carriers for fluorocarbon resins. The compositions have a combination of high fluorocarbon content, high solids content, and a low viscosity suitable for coil coating. Thus, the solids are borne in organic solvent systems which permit minimization of the viscosity and a moderate evaporation rate. The solvent system has a &dgr;,of from 1.7 to 2.6 (calories/cubic centimeter),and a &dgr;,of from 8 to 9.5 (calories/cubic centimeter),and is exemplified by a mixture of 4 or more of the following solvents: aliphatic ketones having from 4 to 10 carbon atoms, alkyl esters having a total of from 5 to 7 carbon atoms, aromatic acid esters having from 8 to 12 carbon atoms, lactones, and aromatic solvents. The acrylic polymer is comprised of (a) acrylic esters having no additional functionality, (b) acrylic esters having additional functionality by which the acrylic polymer may be cross-linked, and (c) an acryloxyalkyl oxazolidine.