Aromatic liquid-crystalline polyester composition and film of the same

• US 7,344,657 B2
• Filed: 09/23/2005
• Issued: 03/18/2008
• Est. Priority Date: 09/30/2004
• Status: Expired due to Fees

• Current Assignee: Sumitomo Chemical Company Limited
• Original Assignee: Sumitomo Chemical Company Limited
• Inventors: Katagiri, Shiro, Okamoto, Satoshi
• Primary Examiner(s): WU, SHEAN CHIU
• Application Number:
  US11/232,884
• Publication Number:
  US 20060069190A1
• Time in Patent Office: 907 Days
• Field of Search: 428/1.6, 428/1.62, 428/209, 428/458, 428/480, 428/910, 524/284, 524/341, 524/601, 525/444, 528/176, 528/190, 528/191, 528/193, 528/206, 528/207, 528/212, 528/305, 528/308, 528/495, 252/299.01
• US Class Current: 252/299.01
• CPC Class Codes: C08K 5/136 Phenols containing halogens
• CPC Class Codes: C08L 67/03 the dicarboxylic acids and dihydroxy compounds having the carboxyl- and the hydroxy groups directly linked to aromatic rings
• CPC Class Codes: C09K 2323/06 Substrate layer characterised by chemical composition
• CPC Class Codes: C09K 2323/061 Inorganic, e.g. ceramic, metallic or glass
• CPC Class Codes: H05K 1/0326 containing O
• CPC Class Codes: H05K 2201/0141 Liquid crystal polymer [LCP]
• CPC Class Codes: H05K 3/4626 characterised by the insulating layers or materials H05K3/4688 takes precedence
• CPC Class Codes: Y10S 428/91 Product with molecular orientation
• CPC Class Codes: Y10T 428/31681 Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
• CPC Class Codes: Y10T 428/31786 Of polyester [e.g., alkyd, etc.]

Abstract

An aromatic liquid-crystalline polyester composition is provided, which comprises at least one compound selected from an aliphatic carboxylate aryl ester and an aromatic carboxylic anhydride; an aromatic liquid-crystalline polyester; and a solvent containing at least 30% by weight of a halogen-substituted phenol compound. Using the composition, an aromatic liquid-crystalline polyester film with a low viscosity in melting state can be obtained.

Claims

1. An aromatic liquid-crystalline polyester composition comprising:

at least one compound selected from an aliphatic carboxylate aryl ester of formula (II) and an aromatic carboxylic anhydride;

an aromatic liquid-crystalline polyester; and

a solvent containing at least 30% by weight of a halogen-substituted phenol compound represented by formula (I);

2. The composition according to claim 1, wherein the at least one compound is contained in the amount of about 0.1 part by weight to about 10 parts by weight on the basis of 100 parts by weight of the aromatic liquid-crystalline polyester, and the aromatic liquid-crystalline polyester is contained in the amount of about 0.5 part by weight to about 100 parts by weight on the basis of 100 parts by weight of the solvent.

3. A liquid-crystalline aromatic polyester film obtainable by casting the composition according to claim 1 onto a support into a film form and removing the solvent.

4. A laminate comprising the liquid-crystalline aromatic polyester film according to claim 3 and a metal layer.

5. A multi-layered board comprising at least one of the liquid-crystalline aromatic polyester film obtainable from the composition according to claim 1 and at least one of metal layer.