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:
Jul. 13, 1976
Filed:
Dec. 26, 1973
Applicant:
Inventor:
Arthur A Armstrong, Cary, NC (US);
Assignee:
Monsanto Company, St. Louis, MO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ; C08K / ; C08K / ; C08L / ;
U.S. Cl.
CPC ...
260 / ; 260 / ; 260 342 ;
Abstract
The method of making an acrylic spinning solution wherein a wet acrylonitrile-containing polymer is mixed with a solvent for the polymer to form a slurry, the slurry then being heated under pressure to obtain a polymer solution wherein the polymer is in solution in the solvent. The polymer solution is then passed through an elongated vaporization zone in which the pressure is decreased along the zone to provide a predetermined pressure profile along the length of the zone. The pressure profile through the zone is maintained above the polymer gel profile to remove most of the water while keeping the polymer in solution throughout the vaporizaton zone.