Laminated structures of polyethylene terephthalate and elastomeric copolyesterethers

• US 4,636,442 A
• Filed: 10/11/1985
• Issued: 01/13/1987
• Est. Priority Date: 10/11/1985
• Status: Expired due to Term

• Current Assignee: Eastman Chemical Company
• Original Assignee: Eastman Kodak Company
• Inventors: McFarlane, Finley E., Beavers, Randy S., Shepherd, Freddie A., Musser, Harry R.
• Primary Examiner(s): Herbert, Thomas J.
• Application Number:
  US06/786,433
• Time in Patent Office: 459 Days
• Field of Search: 428/480, 428/482, 428/413, 524/765, 264/22, 525/481
• US Class Current: 428/480
• CPC Class Codes: B32B 2553/00 Packaging equipment or accessories not otherwise provided for
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/285 comprising polyethers
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: C08G 63/672 Dicarboxylic acids and dihydroxy compounds
• CPC Class Codes: Y10T 428/31786 Of polyester [e.g., alkyd, etc.]

Abstract

Disclosed is multi-layered sheet material comprising a layer of polyethylene terephthalate and a layer of an elastomeric copolyesterether. This sheet material is useful in packaging applications where resistance to flex cracking is important.

Claims

1. A shaped article comprising a poly(ethylene terephthalate) layer and a layer comprising an elastomeric polyesterether positioned in contact with said poly(ethylene terephthalate) layer, said polyesterether having an I.V. of about 0.8-1.5, a melting point above about 150°

C. and being the reaction product of

(a) 100 mol % of at least one aromatic or cycloaliphatic dicarboxylic acid having from 8 to 12 carbon atoms,

(b) about 75-96 mol % of an aliphatic or cycloaliphatic glycol having 2 to 13 carbon atoms, and

(c) about 25-4 mol % of polyether glycol having 2-4 carbon atoms between ether units and a molecular weight of about 200-3000.

2. A shaped article according to claim 1 wherein said polyesterether is positioned between two layers of poly(ethylene terephthalate).

3. A shaped article according to claim 1 wherein said dicarboxylic acid of said polyesterether comprises terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid, or 1,4-cyclohexanedicarboxylic acid.

4. A shaped article according to claim 1 wherein said aliphatic or cycloaliphatic glycol of said polyesterether comprises ethylene glycol, diethylene glycol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, 1,4-cyclohexanedimethanol, diethylene glycol or triethylene glycol.

5. A shaped article according to claim 1 wherein said polyesterether is the reaction product of

(a) a dicarboxylic acid component comprising terephthalic acid, isophthalic acid, naphthalene dicarboxylic acid, or 1,4-cyclohexanedicarboxylic acid,

(b) a glycol component comprising about 75 to about 96 mol % ethylene glycol, diethylene glycol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, 1,4-cyclohexanedimethanol, diethylene glycol or triethylene glycol, and

(c) a polyether glycol comprising about 25 to about 4 mol % polytetramethylene ether glycol.

6. A five-layered, shaped article according to claim 1 comprising alternating layers of poly(ethylene terephthalate) and polyesterether.

7. A shaped article according to claim 1 wherein said article is a film.

8. A shaped article according to claim 1 wherein said polyethylene glycol of said polyesterether comprises polytetramethyleneether glycol.

9. A five-layered, shaped article according to claim 8 comprising alternating layers of poly(ethylene terephthalate) and polyesterether.

10. A shaped article according to claim 8 wherein said article is a film.