LIQUID CRYSTALLINE POLYESTER COMPOSITION

• US 20120135228A1
• Filed: 11/29/2011
• Published: 05/31/2012
• Est. Priority Date: 11/30/2010
• Status: Abandoned Application

• Current Assignee: Sumitomo Chemical Company Limited
• Original Assignee: Sumitomo Chemical Company Limited
• Inventors: FUKUHARA, Yoshiyuki, MIYAKOSHI, Ryo
• Application Number:
  US13/305,890
• Publication Number:
  US 20120135228A1
• Time in Patent Office: Days
• US Class Current: 428/339
• CPC Class Codes: C08K 3/36 Silica
• CPC Class Codes: C08L 27/18 Homopolymers or copolymers or tetrafluoroethene
• 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: Y10T 428/269 including synthetic resin or polymer layer or component

Abstract

Disclosed is a liquid crystalline polyester composition which contains a liquid crystalline polyester and mica and which provides a molded article hard to form blisters therein under a high temperature condition, even when it is molded at a high temperature. The liquid crystalline polyester composition is prepared by incorporating the mica and a fluorocarbon polymer whose flow start temperature is 330° C. or lower into the liquid crystalline polyester. The content of the mica in the liquid crystalline polyester composition is preferably from 15 to 100 parts by mass per 100 parts by mass of the liquid crystalline polyester, and the content of the fluorocarbon polymer in the liquid crystalline polyester composition is preferably from 0.2 to 10 parts by mass per 100 parts by mass of the liquid crystalline polyester.

Claims

1. A liquid crystalline polyester composition containing a liquid crystalline polyester, mica and a fluorocarbon polymer whose flow start temperature defined below is 330°

C. or lower, wherein the flow start temperature is a temperature at which the fluorocarbon polymer, melted under a load of 9.8 MPa while being heated at a rate of 4°

C./min with a capillary rheometer, shows a viscosity of 4,800 Pa·

s when extruded through a nozzle with an inner diameter of 1 mm and a length of 10 mm.

2. The liquid crystalline polyester composition according to claim 1, wherein the volume-average particle diameter of the mica is from 1 to 100 μ

m.

3. The liquid crystalline polyester composition according to claim 1, wherein the content of the mica is from 15 to 100 parts by mass per 100 parts by mass of the liquid crystalline polyester.

4. The liquid crystalline polyester composition according to claim 1, wherein the fluorocarbon polymer is polytetrafluoroethylene having a fluorinated end.

5. The liquid crystalline polyester composition according to claim 1, wherein the content of the fluorocarbon polymer is from 0.2 to 10 parts by mass per 100 parts by mass of the liquid crystalline polyester.

6. A molded article obtained by molding the liquid crystalline polyester composition according to claim 1.

7. The molded article according to claim 6, which is a connector.

8. The molded article according to claim 6, which has a thin-walled portion with a thickness of 0.1 mm or less.