Thermoplastic molding composition made of polyarylene ethers and polyphenylene sulfide with improved processing stability

Patent metadata

Field	Value
Publication number	US-9296872-B2
Application number	US-201213473022-A
Country	US
Kind code	B2
Filing date	May 16, 2012
Priority date	May 18, 2011
Publication date	Mar 29, 2016
Grant date	Mar 29, 2016

Abstract

The present invention relates to a thermoplastic molding composition which comprises the following components:
A) from 10 to 50% by weight of at least one polyarylene ether having an average of at most 0.5 phenolic end groups per polymer chain and having no carboxy groups, B) from 5 to 44.5% by weight of at least one polyphenylene sulfide, C) from 10 to 65% by weight of at least one fibrous and/or particulate filler, D) from 0.5 to 20% by weight of an elastic graphite, E) from 0 to 20% by weight of at least one polyarylene ether comprising carboxy groups, F) from 0 to 20% by weight of at least one polyarylene ether having an average of at least 1.5 phenolic end groups per polymer chain and having no carboxy groups, and G) from 0 to 40% by weight of at least one additive

where the sum of the proportions by weight of components A) to G) is 100% by weight, based on the molding composition.

First claim

The invention claimed is:

1. A thermoplastic molding composition comprising
A) from 10 to 50% by weight of at least one polyarylene ether having an average of at most 0.5 phenolic end groups per polymer chain and having no carboxy groups,
B) from 5 to 44.5% by weight of at least one polyphenylene sulfide,
C) from 10 to 65% by weight of at least one fibrous and/or particulate filler, wherein C) comprises no graphite,
D) from 0.5 to 20% by weight of an elastic graphite having an elasticity of from 60 to 130% as measured in a metal cylinder by compressing the graphite under a pressure from 5 to 70 MPa, measuring a first height, removing the pressure, measuring a second height after removing the pressure, and calculating the elasticity from the difference between the first height and the second height,
E) from 0 to 20% by weight of at least one polyarylene ether comprising carboxy groups,
F) from 0 to 20% by weight of at least one polyarylene ether having an average of at least 1.5 phenolic end groups per polymer chain and having no carboxy groups, and
G) from 0 to 40% by weight of at least one additive that comprises no graphite,
where the sum of the proportions by weight of components A) to G) does not exceed 100% by weight, based on the molding composition.

2. The thermoplastic molding composition according to claim 1 , wherein the apparent melt viscosity at 350° C./1150 s −1 of the polyarylene ether A) is from 150 to 300 Pa s.

3. The thermoplastic molding composition according to claim 1 , wherein the intrinsic viscosity of the polyarylene ether A) is from 0.20 to 0.95 dl/g, measured to DIN EN ISO 1628-1.

4. The thermoplastic molding composition according to claim 1 , wherein the polyarylene ether A) used comprises a polyarylene ether sulfone having an average of at most 0.5 phenolic end groups per polymer chain and having no carboxy groups.

5. The thermoplastic molding composition according to claim 1 , wherein the apparent melt viscosity at 350° C./1150 s −1 of the polyphenylene sulfide B) is from 40 to 200 Pa s.

6. The thermoplastic molding composition according to claim 1 , wherein glass fibers are used as component C).

7. The thermoplastic molding composition according to claim 1 , wherein a graphite with d50 particle size of less than 20 μm is used as component D).

8. The thermoplastic molding composition according to claim 1 , wherein a graphite comprising exclusively particles measuring less than 100 μm is used as component D).

9. The thermoplastic molding composition according to claim 1 , wherein a polyarylene ether sulfone comprising carboxy groups is used as polyarylene ether E).

10. The thermoplastic molding composition according to claim 1 , wherein the intrinsic viscosity of the polyarylene ether E) is from 40 to 65 ml/g, measured to DIN EN ISO 1628-1.

11. The thermoplastic molding composition according to claim 1 , wherein the polyarylene ether F) used comprises a polyarylene ether sulfone having an average of at least 1.5 phenolic end groups per polymer chain and having no carboxy groups.

12. A process for producing fibers, foils, or moldings which comprises utilizing the thermoplastic molding composition according to claim 1 .

13. A fiber, foil, or molding comprising a thermoplastic molding composition according to claim 1 .

Assignees

• Weber Martin
• Maletzko Christian
• Hennenberger Florian
• Basf Se

Inventors

• Weber Martin
• Maletzko Christian
• Hennenberger Florian

Classifications

• C08G75/14

  Polysulfides · CPC title

• C08L71/08

  Polyethers derived from hydroxy compounds or from their metallic derivatives (C08L71/02 takes precedence) · CPC title

• C08G65/4006

  (I) or (II) containing elements other than carbon, oxygen, hydrogen or halogen as leaving group (X) · CPC title

• C08L81/02

  Polythioethers; Polythioether-ethers · CPC title

• C08G75/0218

  containing oxygen · CPC title