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:
Jun. 26, 2012
Filed:
Mar. 24, 2009
Thomas G. Rukavina, New Kensington, PA (US);
Robert M. Hunia, Kittanning, PA (US);
Caroline S. Harris, Pittsburgh, PA (US);
Yan Wang, Seven Fields, PA (US);
Veronica L. Frain, Brackenridge, PA (US);
Thomas G. Rukavina, New Kensington, PA (US);
Robert M. Hunia, Kittanning, PA (US);
Caroline S. Harris, Pittsburgh, PA (US);
Yan Wang, Seven Fields, PA (US);
Veronica L. Frain, Brackenridge, PA (US);
PPG Industries Ohio, Inc, Cleveland, OH (US);
Abstract
The present invention provides methods for preparing polyurethanes from reaction components including: (a) reacting about 1 equivalent of at least one polyisocyanate; and about 0.1 to about 0.5 equivalents of at least one polyol having 2 to 18 carbon atoms to form an isocyanate functional urethane prepolymer; and (b) reacting the isocyanate functional urethane prepolymer, about 0.05 to about 1.0 equivalents of at least one branched polyol having 4 to 18 carbon atoms and at least 3 hydroxyl groups; and up to about 0.9 equivalents of at least one polyol different from the branched polyol and having 2 to 18 carbon atoms, wherein the reaction components are essentially free of polyester polyol and polyether polyol, as well as methods for preparing polyurethanes using a one pot process.