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:
Mar. 22, 1977
Filed:
Mar. 03, 1975
Fumiya Nagoshi, Kobe, JA;
Hideyuki Arakawa, Akashi, JA;
Hayashi Uchino, Kobe, JA;
Mitsuru Echigoya, Kobe, JA;
Masaki Matsuo, Kobe, JA;
Kanegafuchi Kagaku Kogyo Kabushiki Kaisha, Osaka, JA;
Abstract
A method of producing a polymer or copolymer solution of vinyl chloride series, wherein polymerization of 100 parts by weight of a monomer mixture of at least 50 weight percent of vinyl chloride and less than 50 weight percent of one or more monomers copolymerizable therewith is carried out in a solvent mixture consisting essentially of 30 to 55 weight percent water, remainder N,N-dimethyl formamide, in the presence of 0.5 to 5 parts by weight of a salt of a monomeric compound having a sulphonic acid group and using an initiator for radical polymerization.