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. 25, 1995
Filed:
May. 25, 1994
Nancy Clungeon, Rock Hill, SC (US);
Gregory J Flynn, Pineville, NC (US);
Zhentao He, Charlotte, NC (US);
Jose M Rodriguez, Fort Mill, SC (US);
Henkel Corporation, Plymouth Meeting, PA (US);
Abstract
This invention relates generally to insolubilizers for use with binders in paper coating compositions. There is provided a process for preparing both an insolubilizer and paper coating composition containing the insolubilizer and a binder which, when applied onto paper products, significantly enhances their wet-rub resistance. The insolubilizer is prepared by: (a) forming a glyoxal-urea adduct by reacting from about 1.0 to about 4.0 moles of glyoxal with about 1.0 mole of urea, at an elevated temperature, (b) cooling the glyoxal-urea adduct to room temperature, (c) adding from about 0.5 to about 2.0 moles of free glyoxal to the glyoxal-urea adduct to form an oligomer, and (d) adjusting the pH of the oligomer to from about 5 to about 7.