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:
May. 14, 1985
Filed:
Apr. 27, 1984
Applicant:
Inventors:
Akio Hata, Yamaguchi, JP;
Michifumi Tanga, Yamaguchi, JP;
Assignee:
Tokuyama Sekisui Kogyo Kabushiki Kaisha, Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
5263442 ; 526 62 ; 526 74 ; 526344 ; 528484 ;
Abstract
A method for removing polymer scales adhering to the inner surface of a polymerization vessel, which comprises polymerizing vinyl chloride monomer in an aqueous medium, discharging the resulting vinyl chloride polymer together with the aqueous medium from the polymerization vessel, thereafter placing in the vessel both a reaction product resulting from the reaction of an amine and acrylic acid or its derivative and an organic liquid which can dissolve or swell the polyvinyl polymer, and washing the inner surface of the vessel with the organic liquid solution of the reaction product.