COMPOSITION MADE FROM POLY(ARYLENE-ETHER-KETONE) (PAEK) STABLE IN A MOLTEN STATE
A composition made from poly(arylene-ether-ketone) (PAEK), characterized in that it includes an organometallic phosphate salt, or a mixture of organometallic phosphate salts. 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 the composition.
1 . A composition based on poly(arylene ether ketone) (PAEK), wherein the composition comprises an organometallic phosphate salt or a mixture of organometallic phosphate salts.
2 . The composition as claimed in claim 1 , wherein the organometallic phosphate salt(s) have the following formula:
wherein R is or is not different from R′, R and R′ being formed by one or more aromatic groups which are substituted or unsubstituted by one or more groups having from 1 to 9 carbons, R and R′ possibly being directly linked to one another or separated by at least one group chosen from the following groups: —CH 2 —; —C(CH 3 ) 2 —; —C(CF 3 ) 2 —; —SO 2 —; —S—; —CO—; —O—, and M represents an element from Group IA or IIA of the Periodic Table.
3 . The composition as claimed in claim 1 , wherein the organometallic phosphate salt is sodium 2,2′-methylenebis(4,6-di-tert-butylphenyl) phosphate.
4 . The composition as claimed in claim 1 , wherein the proportions of organometallic phosphate salt in the composition are between 10 ppm and 50 000 ppm.
5 . 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.
6 . The composition as claimed in claim 1 , wherein the composition based on PAEK is a poly(ether ketone ketone) (PEKK) composition.
7 . The composition as claimed in claim 6 , 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.
8 . The composition as claimed in claim 1 , wherein the composition also comprises at least one filler and/or at least one other additive.
9 . The composition as claimed in claim 1 , wherein the composition is stable in the molten state.
10 . The composition as claimed in claim 1 , wherein the organometallic phosphate salt or the mixture of organometallic phosphate salts also acts as a nucleating agent within said composition.
11 . 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 .
12 . The use of an organometallic phosphate salt to stabilize a composition based on poly(arylene ether ketone) (PAEK) in the molten state.