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. 26, 2011
Filed:
Sep. 18, 2009
Barrett Richard Bobsein, Sellersville, PA (US);
Melissa Merlau Johnson, Ambler, PA (US);
Joseph Joseph Rabasco, Allentown, PA (US);
Ling LI, Blue Bell, PA (US);
Barrett Richard Bobsein, Sellersville, PA (US);
Melissa Merlau Johnson, Ambler, PA (US);
Joseph Joseph Rabasco, Allentown, PA (US);
Ling Li, Blue Bell, PA (US);
Rohm and Haas Company, Philadelphia, PA (US);
Abstract
A polymer composition with blocks of hydrophobes attached to or within the backbone of an associative thickener. The blocks are composed of two or more units of the same or different hydrophobes whereby the hydrophobe is reversibly switched between being hydrophilic and hydrophobic in nature. When the hydrophobe is rendered hydrophilic, the aqueous thickener is pourable and readily incorporated into aqueous polymer compositions. When this hydrophobe is rendered hydrophobic, the thickener performs its thickening function efficiently, especially in tinted systems. Switching is readily accomplished by adjusting the pH of the associative thickener composition and the aqueous polymer composition being thickened.