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:
Nov. 25, 1997
Filed:
Oct. 05, 1995
Applicant:
Inventors:
Lawrence E Katz, Orange, CT (US);
Edward A Barsa, Cheshire, CT (US);
Benjamin W Tucker, Bethany, CT (US);
Paul V Grosso, Eagan, MN (US);
Assignee:
Arco Chemical Technonogy, L.P., Greenville, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528 52 ; 528 44 ; 528 53 ; 2521822 ; 544193 ; 544222 ;
Abstract
A process for preparing isocyanate adducts having a high proportion of monoisocyanurate using a quaternary ammonium carboxylate trimerization catalyst. Also claimed are specific carboxylate catalysts, together with a process for producing the catalysts. The catalysts are particularly useful for trimerizing hexamethylene diisocyanate and isophorone diisocyanate.