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:
Apr. 26, 2016
Filed:
Mar. 05, 2012
Prachur Bhargava, Wilmington, DE (US);
Glen T. Carroll, Norristown, PA (US);
Tuyen T. Nguyen, Newark, DE (US);
Kostantin A. Vaynberg, Cherry Hill, NJ (US);
Prachur Bhargava, Wilmington, DE (US);
Glen T. Carroll, Norristown, PA (US);
Tuyen T. Nguyen, Newark, DE (US);
Kostantin A. Vaynberg, Cherry Hill, NJ (US);
HERCULES INCORPORATED, Wilmington, DE (US);
Abstract
The present invention relates generally to water soluble polymer powder formulations, and more particularly, to a cellulose ether formulation which in powder form is suitable for direct addition to water-based systems to produce smooth, lump free solutions. The cellulose ethers are crosslinked with an aldehyde crosslinker and include a dry weak acid which slows hydrolysis of the hermiacetal linkage formed by the crosslinker. The selected acid does not adversely affect solubility stability.