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. 04, 1980
Filed:
Aug. 14, 1979
Applicant:
Inventors:
William L Carlstrom, West Bend, WI (US);
Gary L Maechtle, West Bend, WI (US);
Assignee:
Freeman Chemical Corporation, Port Washington, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; C08G / ; B32B / ;
U.S. Cl.
CPC ...
428315 ; 428310 ; 428311 ; 521 51 ; 521131 ; 521906 ;
Abstract
A flexible polyurethane foam having a low flame spread index is produced by combining polyol (preponderantly diol and/or triol) with polyisocyanate (preponderantly diisocyanate) in the presence of a foaming catalyst and a blowing agent. By combining at least 75% by weight of pentabromoethyl benzene, based upon the weight of the polyol, a flame spread index less than 150 can be achieved for the resulting foam in the ASTM test E-162-76. Significantly, polyurethane foams having a flame spread index less than 25 have been produced with this invention.