MULTILAYER COMPOSITE MATERIAL HAVING A LAYER OF POLYCARBONATE

• US 20080182094A1
• Filed: 01/28/2008
• Published: 07/31/2008
• Est. Priority Date: 01/29/2007
• Status: Abandoned Application

• Current Assignee: Bayer Materialscience AG (Covestro AG)
• Original Assignee: Bayer Materialscience AG (Covestro AG)
• Inventors: Meyer, Klaus, Meyer, Alexander, Pudleiner, Heinz, Yesildag, Mehmet-Cengiz
• Application Number:
  US12/020,926
• Publication Number:
  US 20080182094A1
• Time in Patent Office: Days
• US Class Current: 428/220
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: C08G 64/14 containing a chain-terminating or -crosslinking agent
• CPC Class Codes: Y10T 156/10 Methods of surface bonding and/or assembly therefor
• CPC Class Codes: Y10T 428/31507 Of polycarbonate

Abstract

A multilayer composite material having at least one layer of (co)polycarbonate is disclosed. The (co)polycarbonate contains as end groups phenolate groups of formula (1)

wherein R is selected from the group consisting of C₁₀-C₂₅-alkyl, C₁₀-C₂₅-alkoxy and C₁₀-C₂₅-alkyl-substituted aryl. The inventive composite material which may be transparent or colored, exhibits improved laminability and processability as compared with the prior art and may be laser-printable.

Claims

1. A multilayer composite material comprising at least one layer of (co)polycarbonate the molecular structure of which contains end groups at least one of which conforming to formula (1)

wherein R is a member selected from the group consisting of C₁₀-C₂₅-alkyl, C₁₀-C₂₅-alkoxy and C₁₀-C₂₅-alkyl-substituted aryl.

2. The composite material according to claim 1, wherein said R is linear C₁₂-C₂₀-alkyl.

3. The composite material according to claim 1 wherein said R is m-pentadecyl.

4. The composite material according to claim 1, wherein said end groups includes mostly phenolate groups of formula (I).

5. The composite material according to claim 4, wherein said phenolate groups of formula (I) amount to at least 80% relative to the molar amount of end groups.

6. The composite material according to claim 1, having a thickness of 0.1 to 2 mm.

7. The composite material according to claim 1, wherein said at least one layer is a coextruded film.

8. The composite material according to claim 1 in the form of a member selected from the group consisting of smart ID card, pass, portable data carrier, EC card, health card, credit card and mobile phone card.

9. A process for the production of the composite material according to claim 1 comprising laminating the at least one layer of (co)polycarbonate onto another film.