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. 27, 1980
Filed:
Jan. 27, 1978
Applicant:
Inventor:
Hiroshi Kato, Nishinomiya, JP;
Assignee:
Nippon Gohsel Kagaku Kogyo Kabushiki Kaisha, Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
525 62 ; 8138 ; 210 44 ; 210 45 ; 210 51 ; 210 56 ; 526287 ; 526317 ;
Abstract
Recovery of partially hydrolyzed copolymers of vinyl acetate and unsaturated carboxylic or sulfonic acid from aqueous solution dissolving them by adding an acid to the solution at a temperature of at least 40.degree. C. and then separating the deposited copolymers. This process can be advantageously applied to waste water dissolving the above hydrolyzed copolymers from desizing and washing of textile. About 70 to about 90% of the hydrolyzed copolymers dissolved in the solution can be recovered, and the recovered copolymers can be reused as a sizing agent for fibers.