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:
Oct. 18, 1994
Filed:
Sep. 29, 1989
Applicant:
Inventors:
Ernst O Dueber, Tervuren, BE;
Berend Eling, Wezembeek-Oppem, BE;
Assignee:
Imperial Chemical Industries PLC, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
521124 ; 521125 ; 521128 ; 521160 ; 528 67 ; 25218221 ;
Abstract
RIGID FOAMS, in particular, polyisocyanurate and polyurethene foams having improved fire and surface properties can be prepared by reacting a polymethylene polyphenyl polyisocyanate composition with a polyfunctional active hydrogen compound under foam-forming conditions, the polyisocyanate composition containing not more than 20% by weight of dyisocyanates and not more than 20% by weight of polyisocyanates containing more than 5 isocyanate groups per molecule.