Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Reexamination Certificate
2007-10-11
2010-06-22
Choi, Ling-Siu (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
C524S048000
Reexamination Certificate
active
07741402
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.
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Nae, Hemi, Proceedings of the 78th Ann. Mtg: Technical Program of the Int'l Coatings Expo 2000, Fed. of Soc. for Coatings Technology, pp. 645-702, ISBN 0-934010-46-3 (2000).
Bobsein Barrett Richard
Johnson Melissa Merlau
Rabasco John Joseph
Zeszotarski Carol
Bunn Andrew G.
Chin Hui
Choi Ling-Siu
Rohm and Haas Company
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