Composition made from poly(arylene-ether-ketone) (PAEK) which is stable in the molten state and method for stabilizing such a composition

Patent metadata

Field	Value
Publication number	US-12258462-B2
Application number	US-202117179080-A
Country	US
Kind code	B2
Filing date	Feb 18, 2021
Priority date	Jul 22, 2015
Publication date	Mar 25, 2025
Grant date	Mar 25, 2025

Abstract

A composition based on poly(arylene ether ketone) (PAEK) which is stable in the molten state, characterized in that it includes a phosphate salt or a mixture of phosphate salts, a process for the stabilization of a composition based on PAEK incorporating said phosphate salts and objects manufactured using the composition.

First claim

The invention claimed is:

1. A composition based on poly(arylene ether ketone) (PAEK) which is stable in the molten state under nitrogen and under air with regard to thermal oxidation,
wherein the composition comprises a mixture of phosphate salts, wherein the mixture of phosphate salts comprises a first phosphate salt chosen among: anhydrous monosodium phosphate, monosodium phosphate monohydrate and monosodium phosphate dihydrate, and a second phosphate salt chosen among anhydrous disodium phosphate, disodium phosphate dihydrate, disodium phosphate heptahydrate, disodium phosphate octahydrate and disodium phosphate dodecahydrate,
wherein the proportions of phosphate salts in the composition are between 100 ppm and 5000 ppm,
wherein composition does not comprise any phosphite and/or any phosphonate.

2. The composition as claimed in claim 1 , wherein the composition based on PAEK is a composition based on one of the following polymers: PEKK, PEEK, PEEKK, PEKEKK, PEEEK or PEDEK.

3. The composition as claimed in claim 1 , wherein the composition based on PAEK is a poly(ether ketone ketone) (PEKK) composition.

4. The composition as claimed in claim 3 , wherein the composition based on PAEK is a composition based on PEKK, and comprises, in addition to the PEKK, at least one of the following polymers: PEK, PEEKEK, PEEK, PEEKK, PEKEKK, PEEEK, PEDEK, with a content of less than 50% by weight of the composition.

5. The composition as claimed in claim 1 , wherein the composition further comprises at least one filler and/or at least one other additive.

6. The composition as claimed claim 1 , wherein the mixture of phosphate salts, also acts as nucleating agent within said composition.

7. The composition as claimed in claim 1 , wherein the percentage change in the viscosity, measured in a molten state, under air, with an oscillation frequency of 0.1 Hz, and with a strain amplitude of 0.5% is lower than the one of said composition without the mixture of phosphate salts.

8. The composition as claimed in claim 1 , wherein the mixture of phosphate salts is water-soluble.

9. The composition as claimed in claim 8 , wherein the mixture of phosphate salts have been incorporated in the composition by wet impregnation of an aqueous solution thereof.

10. The composition as claimed in claim 1 , wherein the mixture of phosphate salts have been incorporated by compounding.

11. A composition based on poly(arylene ether ketone) (PAEK) which is stable in the molten state under nitrogen and under air with regard to thermal oxidation, wherein the composition comprises a mixture of phosphate salts,
wherein the proportions of phosphate salts in the composition are between 100 ppm and 5000 ppm,
wherein composition does not comprise any phosphite and/or any phosphonate,
wherein the mixture of phosphate salts comprises anhydrous monosodium phosphate and anhydrous disodium phosphate.

12. The composition as claimed in claim 1 , wherein composition is stable at a temperature of greater than 350° C.

13. An object manufactured by a technology chosen from laser sintering, fused deposition modeling, molding, injection molding, extrusion, thermoforming, rotational molding, compression molding, compounding or impregnation, using a composition as claimed in claim 1 .

14. The composition as claimed in claim 1 , in the form of granules or in the form of a powder.

15. The composition as claimed in claim 1 , wherein the mixture of phosphate salts is incorporated during a synthesis process of the PAEK.

16. A composition based on poly(arylene ether ketone) (PAEK) which is stable in the molten state under nitrogen and under air with regard to thermal oxidation, wherein the composition comprises a mixture of phosphate salts,
wherein the proportions of phosphate salts in the composition are between 100 ppm and 5000 ppm,
wherein composition does not comprise any phosphite and/or any phosphonate,
wherein the composition based on PAEK is a poly(ether ketone ketone) (PEKK) composition,
wherein the mixture of phosphate salts comprises anhydrous monosodium phosphate and anhydrous disodium phosphate.

17. The composition as claimed in claim 3 , wherein the composition further comprises at least one filler and/or at least one other additive.

18. The composition as claimed claim 3 , wherein the mixture of phosphate salts also acts as nucleating agent within said composition.

19. The composition as claimed in claim 3 , wherein the percentage change in the viscosity, measured in a molten state, under air, with an oscillation frequency of 0.1 Hz, and with a strain amplitude of 0.5% is lower than the one of said composition without the mixture of phosphate salts.

20. The composition as claimed in claim 3 , wherein the mixture of phosphate salts is water-soluble.

21. The composition as claimed in claim 20 , wherein the mixture of phosphate salts have been incorporated in the composition by wet impregnation of an aqueous solution thereof.

22. The composition as claimed in claim 3 , wherein the mixture of phosphate salts have been incorporated by compounding.

23. The composition as claimed in claim 3 , wherein the mixture of phosphate salts is incorporated during a synthesis process of the PAEK.

24. The composition as claimed in claim 3 , wherein composition is stable at a temperature of greater than 350° C.

25. The composition as claimed in claim 3 , in the form of granules or in the form of a powder.

Assignees

• Arkema France

Inventors

• Le Guillaume
• Bussi Philippe

Classifications

• C08K5/521

  Esters of phosphoric acids, e.g. of H3PO4 · CPC title

• C08K2003/322

  Ammonium phosphate · CPC title

• C08L2205/025

  containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title

• C08L2201/08

  Stabilised against heat, light or radiation or oxydation · CPC title

• C08G2650/40

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