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:
Jan. 17, 1984
Filed:
Jul. 27, 1982
Applicant:
Inventors:
Franz Weissenfels, Sieburg, DE;
Walter Engels, Siegberg, DE;
Assignee:
Dynamit Nobel AG, Cologne, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ;
U.S. Cl.
CPC ...
521116 ; 521121 ; 521125 ; 521181 ;
Abstract
Improvement in the preparation of open-pored phenolic resin foams by the foaming of intimate mixtures of water-containing phenolic resol resins in the viscosity range of from 1000 to 20,000 cP, low-boiling organic liquids in which the phenolic resol resins are not soluble as blowing agents and acid-containing hardeners, the improvement comprising adding to the foamable phenolic resol resin before or during the preparation of the foamable mixture, 1.0 to 6.0 weight-percent of ethoxylated castor oil and 0.5 to 5 weight-percent of an alkyl sulfate salt of the general formula