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, 2005
Filed:
Aug. 13, 2002
Kurt Stark, Burgkirchen, DE;
Bernhard Glaser, Wörth, DE;
Werner Bauer, Winhöring, DE;
Peter Tschirner, Emmerting, DE;
Kurt Stark, Burgkirchen, DE;
Bernhard Glaser, Wörth, DE;
Werner Bauer, Winhöring, DE;
Peter Tschirner, Emmerting, DE;
Wacker Polmer Systems GmbH & Co. KG, Burghausen, DE;
Abstract
Low molecular weight polyvinyl acetals have a solution viscosity of from 2 to 12 mPas and a degree of polymerization Pless than 200, and are obtained by hydrolyzing a vinyl ester polymer having a solution viscosity of from 1.0 to 1.6 mPas until the content of vinyl alcohol units is ≧50 mol %, to produce a polyvinyl alcohol whose solution viscosity is from 1.0 to 2.0 mPas, and then acetalizing the resultant polyvinyl alcohol. The products may be used as binders and films of increased adhesion to substrates.