Rigid cycloolefin copolymer film

• US 5,534,606 A
• Filed: 02/14/1994
• Issued: 07/09/1996
• Est. Priority Date: 02/12/1993
• Status: Expired due to Term

• Current Assignee: Ticona GmbH (Celanese Corporation)
• Original Assignee: Hoechst Aktiengesellschaft (Sanofi )
• Inventors: Herrmann-Schoenherr, Otto, Bennett, Cynthia, Osan, Frank, Brekner, Michael-Joachim
• Primary Examiner(s): Zitomer, Fred
• Application Number:
  US08/195,084
• Time in Patent Office: 876 Days
• Field of Search: 526/281, 526/160, 526/308, 526/282
• US Class Current: 526/281
• CPC Class Codes: C08J 2345/00 Characterised by the use of homopolymers or copolymers of compounds having no unsaturated aliphatic radicals in side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic or in a heterocyclic ring system; Derivatives of such polymers
• CPC Class Codes: C08J 5/18 Manufacture of films or sheets

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_i) which has the following dependence on the glass transition temperature T_g :

E.sub.i =(0.0025[GPa/°C.]×T.sub.g [°C.])+B[GPa]

where B=2.93-3.19 and T_g is the glass transition temperature.

Claims

1. 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_i) satisfying the following relation:

space="preserve" listing-type="equation">E.sub.i =(0.0025[GPa/°

C.]×

T.sub.g [°

C.])+B[GPa]

where B=2.93-3.19 and T_g is the glass transition temperature of the cycloolefin copolymer.

3. A film as claimed in claim 1, wherein the ¹³ C-NMR spectrum of the cycloolefin copolymer has peaks at 29.3, 33.3, 40.8 and 49.8 ppm relative to TMS.

4. A film as claimed in claim 1, wherein said film is a single-layer film.

5. A film as claimed in claim 1, wherein said film is uniaxially oriented.

6. A film as claimed in claim 1, wherein said film is biaxially oriented.

7. A film as claimed in claim 1, wherein the cycloolefin copolymer comprises recurring units of the formula (I) and (II), and optionally, (III) and/or (IV) and/or (V):

##STR3## in which (III) is not the same as (I), R¹ to R⁵ are the same or different and are selected from the group consisting of H, aryl, C₁ -C₁₀ -alkyl, C₃ -C₁₀ -cycloalkyl, and in which

R⁶ to R¹⁴ are the same or different and have the meaning of R¹ to R⁵, or may be C₂ -C₁₀ -alkenyl or C₃ -C₁₀ -cycloalkenyl, and in which the radical pairs R⁶ /R⁷, R⁸ /R⁹, R¹⁰ /R¹¹ and/or R¹² /R¹³ in each case are bonded to one another and, together with the carbon atoms to which they are bonded, are a C₄ -C₁₀ -cycloalkyl or C₄ -C₁₀ -cycloalkenyl radical, which in turn can be bridged by a --C(R¹,R²)-radical, in which R¹ and R² have the meanings given above for R¹ to R⁵.

8. A film as claimed in claim 7, wherein R¹, R², R³, R⁴ and R⁵ are hydrogen.

9. A film as claimed in claim 1, wherein the cycloolefin copolymer has been prepared using a metallocene catalyst system.

10. A film as claimed in claim 1, wherein the glass transition temperature of the cycloolefin copolymer is between 50°

and 250°

C.

11. A film as claimed in claim 1, wherein the cycloolefin copolymer has a viscosity number of between 25 and 500 ml/g measured in decalin at 135°

C.

12. A film as claimed in claim 1, said film further comprising 0 to 2% by weight of inert particles, based on the weight of the film.

13. A capacitor dielectric film comprising a film as claimed in claim 1.

14. An electrical insulation comprising a film as claimed in claim 1.

15. A packaging film comprising a film as claimed in claim 1.

16. A reproduction film comprising a film as claimed in claim 1.

17. A display window for LCD cells comprising a film as claimed in claim 1.

2. A film having at least one layer in which at least one of said layers comprises a cycloolefin copolymer, wherein the ¹³ C-NMR spectrum of the cycloolefin copolymer has a peak at 40.8 ppm relative to TMS.