Liquid-crystalline polymer composition

• US 6,797,198 B1
• Filed: 03/27/2002
• Issued: 09/28/2004
• Est. Priority Date: 10/08/1999
• Status: Expired due to Term

• Current Assignee: Polyplastics Co., Ltd. (Daicel Corporation)
• Original Assignee: Polyplastics Co., Ltd. (Daicel Corporation)
• Inventors: Ohshiba, Hirokazu, Ohtake, Mineo, Miyashita, Takayuki
• Primary Examiner(s): Wu, Shean C.
• Assistant Examiner(s): Sadula, Jennifer R.
• Application Number:
  US10/089,183
• Time in Patent Office: 916 Days
• Field of Search: 252/299.01, 252/294.1, 252/299.2, 252/299.3, 252/299.4, 252/299.5, 252/299.6, 252/299.61, 252/299.62, 252/299.63, 252/299.64, 252/299.65, 252/299.66, 252/299.67, 252/299.68, 252/299.7, 428/357, 106/401, 106/415-417, 106/316
• US Class Current: 252/299.01
• CPC Class Codes: C09K 19/3809 Polyesters; Polyester derivatives, e.g. polyamides
• CPC Class Codes: C09K 19/52 characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
• CPC Class Codes: Y10T 428/29 Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof

Abstract

This invention offers a liquid crystal polymer which exhibits an excellent low warp and is advantageously used especially as a connector or the like. That is, a liquid crystal polymer composition in which a plate-shaped filler (B) in an amount of 5-100 parts by weight satisfying the following formulae (1) and (2) and having an average particle diameter of 0.5-100 μm is compounded with 100 parts by weight of a liquid crystal polymer (A).

D/W≦5  (1)

3≦W/H≦200  (2)

wherein D is the maximum particle diameter of the plate-shaped filler (B), and the direction of the diameter D is defined as “x”; W is a particle'"'"'s diameter which is in the direction y at the right angle to the direction x; and H is a thickness of the particle in the direction of z which is vertical to the xy-plane.

Claims

1. A liquid crystal polymer composition comprising 100 parts by weight of a liquid crystal polymer (A) and 5-100 parts by weight of a plate-shaped filler (B) wherein the plate-shaped filler satisfies the following formulae (1) and (2) and has an average particle diameter of 0.5-100 μ

m.

2. The composition according to claim 1, wherein 5-100 parts by weight of a fibrous filler (C) having an average fiber diameter of 5-20 μ

m and an average aspect ratio of at least 15 are further compounded therewith to 100 parts by weight of the liquid crystal polymer (A).

3. The composition according to claim 2, wherein the fibrous filler (C) is glass fiber.

4. The composition according to claim 3, wherein the liquid crystal polymer (A) is a polyester amide.

5. A connector which is manufactured from the composition according to claim 3.

6. The composition according to claim 2, wherein the plate-shaped filler (B) consists of at least one substance selected from talc, mica, kaolin and graphite.

7. The composition according to claim 6, wherein the fibrous filler (C) is glass fiber.

8. The composition according to claim 7, wherein the liquid crystal polymer (A) is a polyester amide.

9. The composition according to claim 6, wherein the liquid crystal polymer (A) is a polyester amide.

10. A connector which is manufactured from the composition according to claim 6.

11. The composition according to claim 2, wherein the liquid crystal polymer (A) is a polyester amide.

12. A connector which is manufactured from the composition according to claim 2.

13. The composition according to claim 1, wherein the plate-shaped filler (B) consists of at least one substance selected from talc, mica, kaolin and graphite.

14. The composition according to claim 13, wherein the fibrous filler (C) is glass fiber.

15. The composition according to claim 14, wherein the liquid crystal polymer (A) is a polyester amide.

16. The composition according to claim 13, wherein the liquid crystal polymer (A) is a polyester amide.

17. A connector which is manufactured from the composition according to claim 13.

18. The composition according to claim 7, wherein the liquid crystal polymer (A) is a polyester amide.

19. A connector which is manufactured from the composition according to claim 1.

20. The composition according to claim 1, wherein the plate-shaped filler (B) satisfies a D/W of formula (1) of ≦

2.4, and satisfies W/H of formula (2) of 3 to 42.