Rigid cycloolefin copolymer film
AssigneeHoechst Aktiengesellschaft
InventorsCynthia Bennett, Michael-Joachim Brekner, Otto Herrmann-Schoenherr, Frank Osan
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Abstract
A rigid single- or multilayer non-oriented or mono- or biaxially oriented film in which at least one layer comprises a cycloolefin copolymer, wherein the cycloolefin copolymer has an intrinsic E modulus (E.sub.i) which has the following dependence on the glass transition temperature T.sub.g : E.sub.i =(0.0025[GPa/.degree.C]times.T.sub.g [.degree.C.])+B[GPa] where B=2.93-3.19 and T.sub.g is the glass transition temperature.
Claims17
A film having at least one layer in which at least one of said layers comprises a non-ring opening cycloolefin copolymer, wherein the cycloolefin copolymer has an intrinsic E modulus (E.sub.i) satisfying the following relation:
- E.sub.i =(0.0025[GPa/.degree.C]times.T.sub.g [.degree.C.])+B[GPa]
- where B=2.93-3.19 and T.sub.g is the glass transition temperature of the cycloolefin copolymer.
A film having at least one layer in which at least one of said layers comprises a cycloolefin copolymer, wherein the .sup.13 C-NMR spectrum of the cycloolefin copolymer has a peak at 40.8 ppm relative to TMS.
Dependencies are inferred from the claim text.