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:
Jan. 30, 2001
Filed:
Oct. 06, 1998
Applicant:
Inventor:
Susumu Nikkeshi, Fukushima, JP;
Assignee:
Tohoku Munekata Co Ltd, Fukushima-Ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 5/16 ;
U.S. Cl.
CPC ...
B32B 5/16 ;
Abstract
The present invention relates to silicon oxide having tannic acid adsorbed thereon, which is used as a degradation-preventing additive for a thermoplastic resin. This can be obtained by treating 100 parts by weight of silicon oxide with a solution containing 0.5 to 8.0 parts by weight of tannic acid to allow tannic acid to be adsorbed thereon. A reduction (degradation) in a molecular weight of a thermoplastic resin brought about by hydrolysis caused by moisture for a long period of time or thermal decomposition in molding can be inhibited by adding 0.2 to 3.4 % of the tannic acid-adsorbed silicon oxide thus obtained to a thermoplastic resin.