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:
Sep. 07, 2010
Filed:
Jul. 21, 2006
Thomas Savino, Northville, MI (US);
Nikolay Lebedinski, West Bloomfield, MI (US);
Thomas Savino, Northville, MI (US);
Nikolay Lebedinski, West Bloomfield, MI (US);
BASF Corporation, Florham Park, NJ (US);
Abstract
A method produces a uretonimine-modified isocyanate composition having increased low-temperature tolerance. The method comprises providing a first polyisocyanate composition having two or more isocyanate groups and comprising 4,4'-diphenylmethane diisocyanate (MDI) and reacting the first polyisocyanate composition at a temperature of from about 90° C. to about 115° C. and in the presence of a catalyst such that the isocyanate groups form carbodiimides for forming uretonimine and uretonimine oligomers. The reaction of the first polyisocyanate composition is quenched with a quenching agent to produce an intermediate composition having an intermediate isocyanate value of from about 21.0 to about 26.0. The intermediate composition is blended with a second isocyanate composition to form a stable uretonimine-modified isocyanate composition.