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:
Jun. 22, 1999
Filed:
Jan. 27, 1997
Applicant:
Inventors:
Robert Fuss, Kelkheim, DE;
Hans-Karl Mueller, Kelsterbach, DE;
Assignee:
Clariant GmbH, Frankfurt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
525 62 ; 525 56 ; 525 61 ;
Abstract
The reaction of polyvinyl acetate in methanolic solution with methanolic sodium hydroxide at a temperature between 10.degree. C. and 65.degree. C. with stirring at a stirring speed of from 5 to 200 rpm with a stirrer which has a ratio of stirrer diameter (d) to container diameter (D) in the range of 0.6<d/D<0.999 leads to a homogeneously hydrolyzed polyvinyl alcohol.