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:
Oct. 01, 2002
Filed:
May. 06, 1999
Applicant:
Inventors:
Eleanor Meyer de Groot, Friendswood, TX (US);
Bing Yang, Houston, TX (US);
David Ralph Stewart, Richmond, TX (US);
Assignee:
KRATON Polymers U.S. LLC, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 4/736 ;
U.S. Cl.
CPC ...
B29C 4/736 ;
Abstract
A process for pelletizing elastomeric anionically polymerized polymers which comprises subjecting the polymer to solid state extrusion in a single screw extruder with a length to diameter ratio of 10:1 or less wherein the barrel of the extruder has longitudinal grooves and transversally extending pins to increase mixing wherein the temperature in the extruder is sufficient to agglomerate or melt the polymer but be lower than the degradation temperature of the polymer and the speed of the extruder screw is from 30 to 100 rpm.