Resin composition and molded article

Patent metadata

Field	Value
Publication number	US-12448514-B2
Application number	US-202117482938-A
Country	US
Kind code	B2
Filing date	Sep 23, 2021
Priority date	Mar 27, 2019
Publication date	Oct 21, 2025
Grant date	Oct 21, 2025

Abstract

A resin composition containing an aromatic polyether ketone resin (I); and a fluorine-containing copolymer (II), the resin composition satisfying an r2/r1 ratio of 1.60 or lower, wherein r1 is an average dispersed particle size of the fluorine-containing copolymer (II) and r2 is an average dispersed particle size of the fluorine-containing copolymer (II) after melt flow rate measurement at 380° C. and a load of 5000 g and with a preheating time of five minutes in conformity with ASTM D1238. Also disclosed is a pellet obtained by molding the resin composition and a molded article formed from the resin composition or the pellet.

First claim

What is claimed is:

1. A resin composition comprising:
an aromatic polyether ketone resin (I); and
a fluorine-containing copolymer (II),
the resin composition satisfying an r2/r1 ratio of 1.60 or lower,
wherein r2 is an average dispersed particle size of the fluorine-containing copolymer (II) measured after conducting a melt flow rate measurement at 380° C. and a load of 5000 g and with a preheating time of five minutes in conformity with ASTM D1238, the measurement being performed on a solid of the fluorine-containing copolymer (II) obtained after the melt flow rate measurement, and r1 is an average dispersed particle size of the fluorine-containing copolymer (II) measured prior to conducting the melt flow measurement.

2. The resin composition according to claim 1 ,
wherein the aromatic polyether ketone resin (I) has a melting point of 300° C. to 380° C.

3. The resin composition according to claim 1 ,
wherein the aromatic polyether ketone resin (I) has a glass transition temperature of 130° C. to 220° C.

4. The resin composition according to claim 1 ,
wherein the fluorine-containing copolymer (II) has a melting point of 200° C. to 323° C.

5. The resin composition according to claim 1 ,
wherein the fluorine-containing copolymer (II) is a copolymer of tetrafluoroethylene and a perfluoroethylenic unsaturated compound represented by the following formula (1):
CF 2 ═CF—Rf 1   (1)

wherein Rf 1 is —CF 3 or —ORf 2 , where Rf 2 is a C1-C5 perfluoroalkyl group.

6. The resin composition according to claim 1 ,
wherein the aromatic polyether ketone resin (I) and the fluorine-containing copolymer (II) are present in a mass ratio (I): (II) of 99:1 to 30:70.

7. The resin composition according to claim 1 , further comprising a fibrous filler (III).

8. A pellet obtained by molding the resin composition according to claim 1 .

9. A molded article formed from the pellet according to claim 8 .

10. A molded article formed from the resin composition according to claim 1 .

Assignees

• Daikin Ind Ltd

Inventors

• Nakanishi Koji
• Seki Toyomitsu
• Kono Hideki

Classifications

• C08L27/18

  Homopolymers or copolymers or tetrafluoroethene · CPC title

• C08G65/4012

  Other compound (II) containing a ketone group, e.g. X-Ar-C(=O)-Ar-X for polyetherketones · CPC title

• C08K7/02

  Fibres or whiskers · CPC title

• C08G2650/40

  containing ketone groups, e.g. polyarylethylketones, PEEK or PEK · CPC title

• C08L71/10 Primary

  from phenols · CPC title