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:
May. 26, 1987
Filed:
Jan. 28, 1986
Applicant:
Inventors:
Assignee:
Chemische Werke, Marl, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
540202 ;
Abstract
Isocyanate-uretdiones having the formula: ##STR1## wherein the R groups are identical or different and are hydrocarbon groups having the formulas: ##STR2## and n is an integral or fractional number from 1 to 5. Production of the isocyanate-uretdiones, which can be dissociated by heat up to an extent of greater than 70%, is accomplished through dimerization of aliphatic diisocyanates having the formula: ##STR3## with a phosphine catalyst having the formula: