Powder composition of polyarylene ether ketone ketones allowing an excellent castability/coalescence balance suitable for laser sintering

Patent metadata

Field	Value
Publication number	US-11407906-B2
Application number	US-201816044939-A
Country	US
Kind code	B2
Filing date	Jul 25, 2018
Priority date	Dec 20, 2013
Publication date	Aug 9, 2022
Grant date	Aug 9, 2022

Abstract

A method for producing a surface coated with a coating having an improved coalescence, the method including: providing a composition comprising from 99.6% to 99.99% by weight of at least one powder of at least one polyarylene ether ketone and 0.01 to 0.4% by weight of a hydrophilic flow agent, the hydrophilic flow agent being hydrophilic silica; depositing the composition onto a surface forming a coated surface; and baking the coated surface to form a film on the surface.

First claim

The invention claimed is:

1. A method for producing a surface coated with a coating having an improved coalescence, the method comprising the steps of:
a. providing a composition comprising from 99.6% to 99.99% by weight of at least one powder of at least one polyarylene ether ketone and 0.01 to 0.4% by weight of a hydrophilic flow agent, the hydrophilic flow agent being hydrophilic silica;
b. conditioning the powder composition in an environment with 50% relative humidity
c. depositing the composition onto a surface forming a coated surface; and
d. baking the coated surface to form a coalesced film on the surface.

2. The method of claim 1 , wherein the at least one powder of at least one polyarylene ether ketone is present in an amount within the range of 99.8% to 99.99% by weight and the hydrophilic flow agent is present in an amount within the range of 0.01% to 0.2% by weight of a hydrophilic flow agent.

3. The method of claim 1 , wherein the at least one powder of at least one polyarylene ether ketone is present in an amount within the range of 99.9% to 99.99% by weight and the hydrophilic flow agent is present in an amount within the range of 0.01% to 0.1% by weight of a hydrophilic flow agent.

4. The method of claim 1 , in which at least one polyarylene ether ketone is PEKK.

5. The method of claim 4 , further containing a filler.

6. A coated surface produced by the method of claim 5 .

7. The method of claim 4 , further containing at least one additive.

8. A coated surface produced by the method of claim 4 .

9. The method of claim 4 , in which the PEKK has a mass percentage of terephthalic units relative to the sum of the terephthalic and isophthalic units of between 55% and 85%.

10. The method of claim 9 , in which, in addition to the PEKK, a PEK, PEEKEK, PEEK, PEKEKK or PEKK powder of different chemical structure is added, the PEKK representing more than 50% by mass, limit inclusive.

11. A coated surface produced by the method of claim 10 .

12. The method of claim 4 , in which, in addition to the PEKK, a PEK, PEEKEK, PEEK, PEKEKK or PEKK powder of different chemical structure is added, the PEKK representing more than 50% by mass, limit inclusive.

13. The method of claim 1 , further containing a filler.

14. The method of claim 1 , further containing at least one additive.

15. A coated surface produced by the method of claim 1 .

16. The method of claim 1 , in which baking occurs in an oven.

Assignees

• Arkema France

Inventors

• Brule Benoît
• Ster Hervé
• Mathieu Cyrille
• Decraemer Nadine

Classifications

• B33Y70/10

  Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials · CPC title

• C09D7/61 Primary

  inorganic · CPC title

• C08K3/22

  of metals · CPC title

• B29K2105/251

  Particles, powder or granules (expandable particles B29K2105/046) · CPC title

• C08G2650/40

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