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:
Sep. 15, 1981
Filed:
Mar. 02, 1979
Applicant:
Inventor:
Ingvar K Johansson, Kungsangen, SE;
Assignee:
Svenska Traforskningsinstitutet, Stockholm, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
260 175 ; 260-9 ;
Abstract
A method of producing synthetic resins from waste products containing lignin derivatives and sugars, especially waste liquors from cellulose pulp manufacture, is disclosed. The synthetic resins thus produced are especially utilizable as binders in chipboard, plywood, mineral wool slabs and the like. The method comprises treating the waste product in a first step so as to convert a substantial portion of the sugars contained therein into furfural derivatives. In a second step said furfural derivatives are condensed with the lignin to form a synthetic resin.