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:
Sep. 09, 1997
Filed:
Aug. 03, 1995
Applicant:
Inventors:
Toshihiko Tanaka, Yokkaichi, JP;
Hiroshi Minamide, Yokkaichi, JP;
Assignee:
Tosoh Corporation, Shinnanyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
526210 ; 523334 ; 524386 ; 524387 ; 526209 ; 528495 ; 528496 ;
Abstract
A method of producing suspension polymerized vinyl chloride polymers or copolymers of improved flowability by polymerizing vinyl chloride monomers alone, or in a mixture with other monomers, in an aqueous medium, to form a slurry of polymer suspended in said aqueous medium. After removing unreacted monomers, a polyhydric alcohol is added to the slurry containing the suspension polymerized polymer or to a product obtained after the dewatering of the slurry, in an amount of 0.001 to 0.5 parts by weight based on 100 parts by weight of the vinyl chloride polymer or copolymer suspended in the slurry.