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. 09, 1991
Filed:
Nov. 29, 1989
Applicant:
Inventors:
Leslie Wild, Cincinnati, OH (US);
Donald C Knobeloch, Fairfield, OH (US);
Assignee:
Quantum Chemical Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
528482 ; 528491 ; 528497 ; 528502 ; 528503 ;
Abstract
An improved process for crystallizing polymer subjected to temperature rising elution fractionation is provided. The process improves the separation of the polymer species upon elution and significantly reduces 'tailing' typically observed with such fractionated species. The improvements consists of crystallizing the polymer from a dilute polymer solution outside of the column and in the absence of column packing material. Only after crystallization is the polymer combined with the column packing material. This can be accomplished by either dry-blending or by slurrying.