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. 29, 2014
Filed:
Feb. 14, 2006
Petrus Wilhelmus Franciscus Arisz, Amsterdam, NL;
Kate M. Lusvardi, Chadds Ford, PA (US);
Tuyen T. Nguyen, Newark, DE (US);
Petrus Wilhelmus Franciscus Arisz, Amsterdam, NL;
Kate M. Lusvardi, Chadds Ford, PA (US);
Tuyen T. Nguyen, Newark, DE (US);
Hercules Incorporated, Wilmington, DE (US);
Abstract
This invention relates to non-uniformly substituted ('blocky') hydroxyethylcelluloses (HECs) and derivatives thereof that exhibit associative behavior in both neat solutions and in filled systems. The HECs and derivatives thereof exhibit unique and highly desirable rheology and are more efficient in thickening aqueous systems than prior art HEC products. These blocky HECs can be distinguished from prior art and commercial HEC products by having an unsubstituted anhydroglucose trimer ratio (U3R) greater than 0.21 and the hydroxyethyl molar substitution greater than about 1.3 and less than about 5. This invention also relates to processes for making blocky HEC and uses thereof in functional systems.