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:
Aug. 19, 2014
Filed:
Dec. 22, 2008
Hwa Yong Lee, Gyeonggi-do, KR;
Tae Woong Lee, Gyeonggi-do, KR;
Dong Sik Kim, Seoul, KR;
Nam Jung Kim, Gyeonggi-do, KR;
Young Woo Kim, Incheon, KR;
Hwa Yong Lee, Gyeonggi-do, KR;
Tae Woong Lee, Gyeonggi-do, KR;
Dong Sik Kim, Seoul, KR;
Nam Jung Kim, Gyeonggi-do, KR;
Young Woo Kim, Incheon, KR;
Lubrizol Advanced Materials, Inc., Cleveland, OH (US);
Abstract
Disclosed is a transparent multilayer sheet that is excellent in antistatic properties, as well as transparency. The transparent multilayer sheet includes a surface layer comprising a conductive thermoplastic polyurethane or polyurea resin containing ethylene oxide; and a back layer attached to the surface layer and comprising a transparent non-conductive polymer resin. Preferably, the polyurethane or polyurea resin is a polymerization product of (a) a polyether-based polymer containing ethylene oxide and reacting with an isocyanate group; (b) an aromatic or aliphatic diisocyanate compound; and (c) a chain extender C2 to C10 containing a primary hydroxyl group or an amine group, and the transparent non-conductive polymer resin is selected from the group consisting of polyethylene terephthalate, glycol modified polyethylene tereph-thalate, glycol modified polycyclohexaneterephthalate, polymethylmethacrylate, polycarbonate, transparent acrylonitrile-butadiene-styrene (ABS), and mixtures thereof.