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. 25, 2000
Filed:
Nov. 19, 1997
Karl-Heinz Kochem, Ingbert, DE;
Wolfgang Rasp, Homburg, DE;
Herbert Peiffer, Mainz, DE;
Wilfried Hatke, Hofheim, DE;
Ticona GmbH, Frankfurt, DE;
Mitsui, , JP;
Abstract
The invention relates to a film having more than one layer and made from cycloolefin polymers and having a base layer and at least one outer layer, the base layer being built up essentially from a cycloolefin polymer COP having a glass transition temperature Tg and the outer layer being built up essentially from a mixture of cycloolefin polymers, wherein the mixture of cycloolefin polymers comprises at least two cycloolefin polymers COP.sub.1 and COP.sub.2 whose glass transition temperatures Tg.sub.1 and Tg.sub.2 differ by at least 5.degree. C., where Tg.sub.2 -Tg.sub.1 .gtoreq.5.degree. C. and at the same time the condition Tg.sub.2 -Tg.gtoreq.5.degree. C. is fulfilled.