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, 1976
Filed:
Jul. 15, 1974
Applicant:
Inventor:
Mitchell S Dimitri, Charleston, SC (US);
Assignee:
Westvaco Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
260 175 ; 260-3 ;
Abstract
A process is disclosed for producing lignin-polymer compositions. The process comprises coprecipitation of hexamethylene tetramine modified alkali lignin and rubber or resin latices with a gas, such as carbon dioxide or sulfur dioxide. The lignin-latex coprecipitate is then gas dried at a temperature which causes decomposition of the ammonium carbonate or ammonium sulfite which was formed during the precipitation step, leaving a lignin reinforced polymer free of inorganic salts.