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:
Dec. 23, 2014
Filed:
Aug. 21, 2012
Warren A. Kaplan, Libertyville, IL (US);
Angelo R. Gabbianelli, Waukegan, IL (US);
David J. Norberg, Grayslake, IL (US);
Warren A. Kaplan, Libertyville, IL (US);
Angelo R. Gabbianelli, Waukegan, IL (US);
David J. Norberg, Grayslake, IL (US);
Stepan Company, Northfield, IL (US);
Abstract
A method for improving the thermal stability of polyurethane-modified polyisocyanurate (PU-PIR) foams is provided. Moreover, a process for producing the PU-PIR foams exhibiting improved thermal stability is provided. The foams have incorporated therein a high molecular weight ammonium polyphosphate (APP). APP is employed as a partial or complete substitute for flame retardants conventionally employed in PU-PIR foams. The foams of the invention exhibit excellent and improved thermal stability characteristics as compared to foams to which no APP has been added.