Liquid crystalline polyester composition and metal composite molded product using the same

• US 9,045,621 B2
• Filed: 12/14/2011
• Issued: 06/02/2015
• Est. Priority Date: 02/28/2011
• Status: Active Grant

• Current Assignee: Toray Industries Incorporated
• Original Assignee: Toray Industries Incorporated
• Inventors: Matsubara, Satoshi, Umetsu, Hideyuki, Hase, Takayuki
• Primary Examiner(s): ZACHARIA, RAMSEY E
• Application Number:
  US13/638,052
• Publication Number:
  US 20130022828A1
• Time in Patent Office: 1,266 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: C08K 3/34 Silicon-containing compounds
• CPC Class Codes: C08L 67/00 Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain of polyester-amides C08L77/12; of polyester-imides C08L79/08; Compositions of derivatives of such polymers
• CPC Class Codes: C09K 19/3809 Polyesters; Polyester derivatives, e.g. polyamides
• CPC Class Codes: C09K 2019/521 Inorganic solid particles
• CPC Class Codes: Y10T 428/259 Silicic material
• CPC Class Codes: Y10T 428/31681 Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]

Abstract

A liquid crystalline polyester composition containing at least 100 parts by weight of liquid crystalline polyester (A) and 10 to 100 parts by weight of talc (B). The talc (B) has a ratio (a1/a2) of oil absorption (a1) ml/100 g to specific surface area (a2) m2/g in a range of 14.0 to 26.0 (ml·g)/(100 g·m2) and has a number-average particle diameter of 10 to 30 μm.

Claims

1. A liquid crystalline polyester composition comprising 100 parts by weight of liquid crystalline polyester (A) and 10 to 100 parts by weight of talc (B), wherein

the talc (B) in the composition has a ratio (a1/a2) of oil absorption (a1) ml/100 g to specific surface area (a2) m²/g in a range of 14.0 to 26.0 (ml·

g)/(100 g·

m²) and has a number-average particle diameter of 10 to 30 μ

m.

2. The liquid crystalline polyester composition according to claim 1, wherein

the specific surface area (a2) of the talc (B) is 0.9 to 1.8 m²/g.

3. The liquid crystalline polyester composition according to claim 2, wherein

the talc (B) has residue on 45-micron sieve of 1.0 percent by weight or less relative to a total amount of talc contained in the composition.

4. The liquid crystalline polyester composition according to claim 1, wherein

the talc (B) has residue on 45-micron sieve of 1.0 percent by weight or less relative to a total amount of talc contained in the composition.

5. The liquid crystalline polyester composition according to claim 4, further comprising 10 to 100 parts by weight of glass fiber (C), wherein

the glass fiber (C) has a number-average fiber length of 30 to 500 μ

m.

6. A molded product manufactured by injection molding the liquid crystalline polyester composition according to claim 4.

7. A metal composite molded product comprising the molded product according to claim 6, and having a resin part and a metal part joined to the resin part.

8. A connector or a relay comprising the metal composite molded product according to claim 7.

9. The liquid crystalline polyester composition according to claim 1, further comprising 10 to 100 parts by weight of glass fiber (C), wherein

the glass fiber (C) has a number-average fiber length of 30 to 500 μ

m.

10. The liquid crystalline polyester composition according to claim 1, wherein

the liquid crystalline polyester (A) has structural units (I), (II), (III), (IV) and (V), wherein

content of the structural unit (I) is 65 to 80 mole percent relative to a total amount of the structural units (I), (II) and (III),

content of the structural unit (II) is 55 to 85 mole percent relative to a total amount of the structural units (II) and (III), and

content of the structural unit (IV) is 50 to 95 mole percent relative to a total amount of the structural units (IV) and (V):

11. The liquid crystalline polyester composition according to claim 4, wherein

the liquid crystalline polyester (A) has structural units (I), (II), (III), (IV) and (V), wherein

content of the structural unit (I) is 65 to 80 mole percent relative to a total amount of the structural units (I), (II) and (III),

content of the structural unit (II) is 55 to 85 mole percent relative to a total amount of the structural units (II) and (III), and

content of the structural unit (IV) is 50 to 95 mole percent relative to a total amount of the structural units (IV) and (V):

12. A molded product manufactured by injection molding the liquid crystalline polyester composition according to claim 1.

13. A metal composite molded product comprising the molded product according to claim 12, and having a resin part and a metal part joined to the resin part.

14. A connector or a relay comprising the metal composite molded product according to claim 13.