Abstract: A thickener blend composition, and method for thickening aqueous systems, comprising an associative thickener wherein the same group that is attached to or within the backbone of the associative thickener is reversibly switched between being hydrophilic and hydrophobic in nature. When the group that is attached to or within the backbone is rendered hydrophilic, the aqueous thickener is pourable and readily incorporated into aqueous polymer compositions. When this group is rendered hydrophobic, the thickener performs its thickening function efficiently. Switching is readily accomplished by adjusting the pH of the associative thickener composition and the aqueous polymer composition being thickened.
Type:
Grant
Filed:
March 20, 2008
Date of Patent:
June 22, 2010
Assignee:
Rohm and Haas Company
Inventors:
Jerome Michael Harris, Barrett Richard Bobsein
Abstract: A composition and method whereby the same group that is attached to or within the backbone of an associative thickener is reversibly switched between being hydrophilic and hydrophobic in nature. When the group that is attached to or within the backbone is rendered hydrophilic, the aqueous thickener is pourable and readily incorporated into aqueous polymer compositions. When this group is rendered hydrophobic, the thickener performs its thickening function efficiently. Switching is readily accomplished by adjusting the pH of the associative thickener composition and the aqueous polymer composition being thickened.
Type:
Grant
Filed:
October 11, 2007
Date of Patent:
June 22, 2010
Assignee:
Rohm and Haas Company
Inventors:
Barrett Richard Bobsein, Melissa Merlau Johnson, John Joseph Rabasco, Carol Zeszotarski
Abstract: Composite materials that contain formaldehyde-free, cured binder compositions are disclosed. Also disclosed are methods of making and using composite materials containing formaldehyde-free binder compositions.