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:
Oct. 06, 2015
Filed:
Dec. 06, 2012
Rohn and Haas Company, Philadelphia, PA (US);
Barrett R. Bobsein, Sellersville, PA (US);
John J. Rabasco, Allentown, PA (US);
Rohm and Haas Company, Philadelphia, PA (US);
Abstract
The present invention relates to a process for preparing hydrophobically modified alkylene oxide polyurethanes by polymerizing, in the presence of a catalyst, a solvent-free melt of a polyisocyanate branching agent; a water-soluble polyalkylene glycol having an Mof from 2000 to 11,000 Daltons; and a diisocyanate; wherein the solvent-free melt further includes a hydrophobic capping agent, or a hydrophobic capping agent is added to the melt after the addition of catalyst. Hydrophobically modified alkylene oxide polyurethanes prepared by the process of the present invention show excellent ICI/KU properties and are useful as thickeners for coatings formulations.