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:
Jan. 15, 1980
Filed:
Jun. 12, 1978
Applicant:
Inventors:
Tetsunosuke Shiomura, Takaishi, JP;
Tatuo Ooka, Izumi, JP;
Takashi Kobayashi, Takaishi, JP;
Kazuo Hagiwara, Izumi, JP;
Hideo Sadotomo, Tokyo, JP;
Assignee:
Mitsui Toatsu Chemicals, Incorporated, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
528499 ; 526351 ; 528501 ;
Abstract
A solution containing atactic polypropylene by-produced during the preparation of a propylene-containing polymer is passed through a tubular, elongated heating zone having a pressure difference of at least 3 kg/cm.sup.2 between its inlet and outlet so that the calculated flow velocity at the outlet is at least 40 m/sec, whereby sticky fine particles of molten atactic polypropylene substantially free of the solvent are formed in suspension in the vaporized solvent. Then, the sticky fine particles are separated from the vaporized solvent.