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:
Aug. 18, 2009
Filed:
Apr. 01, 2005
Rina Carlini, Mississauga, CA;
Adela Goredema, Mississauga, CA;
Eniko Toma, Mississauga, CA;
Christine E. Bedford, Burlington, CA;
Rina Carlini, Mississauga, CA;
Adela Goredema, Mississauga, CA;
Eniko Toma, Mississauga, CA;
Christine E. Bedford, Burlington, CA;
Xerox Corporation, Norwalk, CT (US);
Abstract
Processes for preparing bis(urea-urethane) compounds wherein Ris alkyl, aryl, arylalkyl, or alkylaryl, Ris alkylene, arylene, arylalkylene, or alkylarylene, Ris alkylene, arylene, arylalkylene, or alkylarylene, and Ris hydrogen or alkyl, comprising: (1) first bring to a reaction temperature of about 20-125° C. a reaction mixture comprising monoalcohol reactant R—OH and diisocyanate reactant OCN—R—NCO, the monoalcohol being present in an amount of about 0.8-1.2 moles monoalcohol per mole diisocyanate, the monoalcohol and diisocyanate reactants being admixed in a solvent, the reactants and solvent being present in relative amounts of at least about 1 milliliter solvent per millimole diisocyanate, the reaction temperature continuing until reaction between the monoalcohol and the diisocyanate is complete; and (2) subsequent to step (1), adding to the reaction mixture diamine without isolating the reaction product of step (1), thereby forming compound of the formula in desirably high yield and purity.