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. 02, 1976
Filed:
Jul. 09, 1974
Robert J Lockwood, East Haven, CT (US);
Richard H Roess, Clinton, CT (US);
The Upjohn Company, Kalamazoo, MI (US);
Abstract
A novel process for the preparation of polyisocyanurate spray foams is disclosed. The catalyst combination comprises (i) N,N-dimethylcyclohexylamine, and (ii) a tetra (lower-alkyl) quaternary ammonium salt of an alkanoic acid. The use of this catalyst combination in the preparation of polyisocyanurate spray foams enables the systems to be sprayed under conditions of low ambient temperature upon cold substrates and to achieve good adhesion between the foam and substrate under such conditions. The polyisocyanurate foams produced using the novel catalyst combination of the invention are characterized by having high resistance to flame and heat distortion.