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. 09, 1993
Filed:
Oct. 26, 1992
Applicant:
Inventors:
Arno Gardziella, Witten-Rudinghausen, DE;
Achim Hansen, Iserlohn-Letmathe, DE;
Stephan Schroter, Essen, DE;
Josef Suren, Wunnenberg Haaren, DE;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528129 ; 528-1 ; 528149 ; 528155 ; 528163 ; 528218 ; 528230 ; 528250 ; 528254 ; 528423 ; 525398 ; 525405 ; 525480 ; 525481 ; 525491 ; 525496 ; 525497 ; 106 382 ; 106 386 ; 106218 ; 106602 ; 106603 ; 524220 ; 524221 ; 527403 ; 1882 / ;
Abstract
A binding agent for molding compositions and molded bodies produced by reacting a low molecular weight lignin from the Organosolv process with phenol in a weight ratio of 1:20 to 3:1 at 100.degree. to 180.degree. C., adjusting the pH to an acidic value and condensing the mixture with 0.2 to 0.9 moles of formaldehyde per mole of phenol at 60.degree. to 120.degree. C. to form the binding agent useful for producing curable molding compositions, high-temperature molding compositions, refractory products, textile fleeces and friction coatings as well as carbon materials.