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:
Jun. 25, 1996
Filed:
Jun. 15, 1994
Applicant:
Inventors:
Monica A Ferrero-Heredia, East Greenbush, NY (US);
James Day, Scotia, NY (US);
George L Gaines, Jr, Scotia, NY (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
521170 ; 521155 ; 521163 ; 521164 ; 528 48 ; 528 52 ; 528 76 ; 528 85 ; 524196 ; 524198 ;
Abstract
Closed cell polyurethane foams, useful as thermal insulation for refrigerators and the like, are prepared by blending a polyisocyanate, a polyol and a suspension of at least one solid alkaline reagent, preferably sodium hydroxide, in an inert carrier liquid having a suitable viscosity. Preferred carrier liquids include polyepoxides and polyoxyalkylenediamines. The alkaline reagent reacts with and removes the carbon dioxide employed as a blowing agent, thus decreasing the thermal conductivity of the foam.