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