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:
Jan. 10, 1989
Filed:
Aug. 10, 1987
John E Katchko, Barrington, IL (US);
Charles W Strobel, Schaumburg, IL (US);
Thomas H Plaisance, Wilmette, IL (US);
DeSoto, Inc., Des Plaines, IL (US);
Abstract
A thermosetting size applyable to paper in a size press and curable at a temperature not in excess of about 280.degree. F. for 10 seconds is disclosed. This size comprises an aqueous emulsion comprising water having suspended therein aqueous emulsion copolymer particles of monoethylenically unsaturated monomers comprising hydroxy-functional monomer having an hydroxy number of at least about 20, and the balance of the monomers provides a water insoluble polymer having a glass transition temperature of from about -20.degree. C. to about 50.degree. C. The emulsion has a pH greater than about 2.5, preferably from 4.0 to 7.0, and a stoichiometric deficiency of an aminoplast cross-linking agent is used for cure. An acid curing catalyst is uniformly distributed in the size to speed the cure.