Liquid crystalline polyester composition

• US 7,824,572 B2
• Filed: 12/08/2009
• Issued: 11/02/2010
• Est. Priority Date: 06/27/2007
• Status: Expired due to Fees

• Current Assignee: Sumitomo Chemical Company Limited
• Original Assignee: Sumitomo Chemical Company Limited
• Inventors: Okamoto, Satoshi
• Primary Examiner(s): WU, SHEAN CHIU
• Application Number:
  US12/633,091
• Publication Number:
  US 20100084609A1
• Time in Patent Office: 329 Days
• Field of Search: 428/480, 252/299.01, 252/299.5, 252/299.62, 252/299.66, 252/299.67
• US Class Current: 252/299.01
• CPC Class Codes: C08G 63/605 the hydroxy and carboxylic groups being bound to aromatic rings
• CPC Class Codes: C08K 5/01 Hydrocarbons C08K5/0091 takes precedence
• 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 19/12 at least two benzene rings directly linked, e.g. biphenyls
• CPC Class Codes: C09K 19/3809 Polyesters; Polyester derivatives, e.g. polyamides
• CPC Class Codes: C09K 2019/123 Ph-Ph-Ph
• CPC Class Codes: Y10T 428/31786 Of polyester [e.g., alkyd, etc.]

Abstract

The present invention provides a liquid crystalline polyester composition comprising a terphenyl and a liquid crystalline polyester, wherein the terphenyl substantially consists of p-terphenyl, and the p-terphenyl is contained in the composition in the amount of 0.3 to 15 parts by weight on the basis of 100 parts by weight of the liquid crystalline polyester. The liquid crystalline polyester composition has high flowability and low anisotropy, which can also suppress generation of gases when molded.

Claims

1. A liquid crystalline polyester composition comprising a terphenyl and a liquid crystalline polyester, wherein the terphenyl substantially consists of p-terphenyl, and the p-terphenyl is contained in the composition in the amount of 0.3 to 15 parts by weight on the basis of 100 parts by weight of the liquid crystalline polyester.

2. The liquid crystalline polyester composition according to claim 1, wherein the liquid crystalline polyester comprises the structural units shown in anyone of the combinations (a) to (f):

(a);

combination of the structural units (A₁), (B₂) and (C₃);

combination of the structural units (A₂), (B₂) and (C₃);

combination of the structural units (A₁), (B₁), (B₂) and (C₃);

combination of the structural units (A₂), (B₁), (B₂) and (C₃); and

combination of the structural units (A₂), (B₁), (B₂) and (C₃); and

(b);

combinations (a) in which a part or all of structural unit (C₃) is replaced by structural unit (C₁);

(c);

combinations (a) in which a part or all of structural unit (C₃) is replaced by structural unit (C₂),

(d);

combinations (a) in which a part or all of structural unit (C₃) is replaced by structural unit (C₄)

(e);

combinations (a) in which a part or all of structural unit (C₃) is replaced by structural units (C₄) and (C₅), and

(f);

combinations (a) in which a part of (A₁) is replaced by structural unit (A₂), in which the structural units (A₁)-(A₂), (B₁)-(B₃) and (C₁)-(C₃) are represented by the following formulas;

3. The liquid crystalline polyester composition according to claim 2, which is obtainable by melt-kneading the liquid crystalline polyester with the terphenyl.

4. The liquid crystalline polyester composition according to claim 2 or 3, further comprising an inorganic filler in an amount of 0.1 to 400 parts by weight on the basis of 100 parts by weight of the liquid crystalline polyester.

5. A molded article obtained by melt-molding the liquid crystalline polyester composition of claim 2.

6. A surface-mount component obtained by melt-molding the liquid crystalline polyester composition of claim 2.