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. 04, 2013
Filed:
May. 07, 2010
Rory D. Daussin, Spring, TX (US);
Paula A. Cameron, Manvel, TX (US);
Lao-jer Chen, Sugar Land, TX (US);
Jorge Jimenez, Lake Jackson, TX (US);
Joerg-peter Gehrke, Stade, DE;
Rory D. Daussin, Spring, TX (US);
Paula A. Cameron, Manvel, TX (US);
Lao-Jer Chen, Sugar Land, TX (US);
Jorge Jimenez, Lake Jackson, TX (US);
Joerg-Peter Gehrke, Stade, DE;
Dow Global Technologies LLC, Midland, MI (US);
Abstract
The present invention is a process for aliphatic or cycloaliphatic isocyanate. The process comprises reacting an aliphatic or cycloaliphatic primary amine, with phosgene in the presence of an inert solvent wherein the initial reaction temperature is between 100 and 130° C. and the temperature is subsequently ramped to 150 to 180° C. during the course of the reaction, the solvent to amine weight ratio is 95:5 to 80:20, the total reaction pressure is maintained between 50 and 350 psig and the amine is rapidly dispersed in the phosgene through injection in a region of high efficiency mixing.