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:
Sep. 17, 2002
Filed:
Sep. 20, 2000
Seiji Tanimoto, Kurashiki, JP;
Naokiyo Inomata, Kurashiki, JP;
Kuraray Co., Ltd., Kurashiki, JP;
Abstract
Provided is an aqueous emulsion comprising, as the dispersant, a polyvinyl alcohol containing from 1 to 15 mol % of ethylene units in the molecule and having a degree of hydrolysis of at least 95 mol %; and, as the dispersoid, a vinyl ester polymer. The aqueous emulsion is characterized in that, when its film is immersed in water at 20° C. for 24 hours, the degree of water solubility of the film is at most 1.5%, and the degree of water absorption of the film is at most 30%, and that the ratio of the emulsion viscosity at 60° C. (T ) to the emulsion viscosity at 20° C. (T ) T /T is at most 2. The aqueous emulsion has good high-temperature viscosity stability (that is, this depends little on ambient temperatures and has good high-temperature storage stability), and has improved water resistance and improved low-temperature storage stability.