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. 05, 1981
Filed:
Feb. 11, 1980
Applicant:
Inventor:
Anupama Mishra, Guelph, CA;
Assignee:
Uniroyal Ltd., Ontario, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
260 324 ; 260 / ; 4273855 ; 4284231 ; 528 50 ; 528 52 ; 544193 ;
Abstract
Potassium salt of 2-pyrrolidinone is used as a catalyst to cyclotrimerize an organic diisocyanate, yielding a mixture of monomeric cyclotrimerized product (isocyanurate) and oligomers thereof, soluble in common organic solvents and vinyl monomers. The catalyst can be used to make one-shot isocyanurate-crosslinked polyurethanes. Prepolymers and moisture-curing coating compositions can also be prepared.