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:
Apr. 28, 1998
Filed:
Nov. 25, 1994
William A Ames, Longview, TX (US);
Robert E Holliday, Longview, TX (US);
Timothy J McKeon, White Oak, TX (US);
Luis A Pagan, Longview, TX (US);
James H Scott, Longview, TX (US);
Horst K Seeger, Longview, TX (US);
Gregory T Slemons, Longview, TX (US);
Max Statman, Longview, TX (US);
Jeffrey J Vanderbilt, Longview, TX (US);
Eastman Chemical Company, Kingsport, TN (US);
Abstract
A process for the production of elastomeric polypropylene is disclosed. The process entails contacting the propylene monomer neat or in an unreactive hydrocarbon solvent, with a catalyst in a recirculated, stirred reactor at a temperature of about 60.degree. to 80.degree. C. thereby producing elastomeric polypropylene. The reactor contents are in the slurry/solution phase and are essentially free of catalyst poisons. The reactor is capable of recirculating contents that are very viscous such that the reactor contents are well mixed while a portion of the contents of the reactor containing propylene, any solvent, and elastomeric polypropylene are continually removed by the use of a high viscosity pump to recover the elastomeric polypropylene.