Composition based on poly(arylene ether ketone) having improved properties
View Patent ↗The present invention relates to a composition based on poly(ether ether ketone) (PEEK) comprising poly(ether ketone ketone) (PEKK), characterized in that the poly(ether ketone ketone) (PEKK) comprises a mixture of terephthalic and isophthalic units, the percentage by weight of terephthalic units, with respect to the sum of the terephthalic and isophthalic units, being between 55 and 85%, limits included, and preferably between 55 and 70%, the said composition comprising between 1 and 40%, limits included, preferably between 5 and 40% and more preferably still between 10 and 30% by weight of PEKK, with respect to the total weight of the composition.
1. A composition comprising a) a polymer selected from poly(ether ether ketone) (PEEK), poly(ether ketone) (PEK) or poly(ether ketone ether ketone ketone) (PEKEKK) and b) poly(ether ketone ketone) (PEKK), wherein the poly(ether ketone ketone) (PEKK) comprises a mixture of terephthalic and isophthalic units, the percentage by weight of terephthalic units, with respect to the sum of the terephthalic and isophthalic units, being between 55 and 85%, limits included, and wherein the composition is comprised of between 1 and 40%, limits included, by weight of PEKK, with respect to the total weight of the composition.
2. The composition according to claim 1 , wherein the PEKK is a PEKK blend, each PEKK exhibiting a percentage by weight of terephthalic units, with respect to the sum of the terephthalic and isophthalic units, of between 55 and 85%, limits included.
3. The composition according to claim 1 , wherein the composition comprises at least one additive.
4. The composition according to claim 1 , wherein the composition is comprised of PEEK and the proportion by weight of PEEK in the composition is between 60 and 99%, limits included, with respect to the total weight of the composition.
5. The composition according to claim 1 , wherein the percentage by weight of terephthalic units, with respect to the sum of the terephthalic and isophthalic units, is between 55 and 70%.
6. The composition according to claim 1 , wherein the composition is comprised of between 5 and 40%, limits included, by weight of PEKK, with respect to the total weight of the composition.
7. The composition according to claim 1 , wherein the composition is comprised of between 10 and 30%, limits included, by weight of PEKK, with respect to the total weight of the composition.
8. The composition according to claim 1 , wherein the PEKK is a PEKK blend, each PEKK exhibiting a percentage by weight of terephthalic units, with respect to the sum of the terephthalic and isophthalic units, of between 55 and 70%, limits included.
9. The composition according to claim 1 , wherein the composition is comprised of PEEK and the proportion by weight of PEEK in the composition is between 60 and 95%, limits included, with respect to the total weight of the composition.
10. The composition according to claim 1 , wherein the composition is comprised of PEEK and the proportion by weight of PEEK in the composition is between 70 and 90%, limits included, with respect to the total weight of the composition.
11. A process for improving the yield point and/or the elongation at break of a composition comprised of poly(ether ether ketone) (PEEK), poly(ether ketone) (PEK) or poly(ether ketone ether ketone ketone) (PEKEKK), wherein the process comprises incorporating PEKK in the composition, wherein the PEKK comprises a mixture of terephthalic and isophthalic units, the percentage by weight of terephthalic units, with respect to the sum of the terephthalic and isophthalic units, being between 55 and 85%, limits included, and wherein the PEKK is incorporated in the composition in a proportion of between 1 and 40%, limits included, by weight, with respect to the total weight of the composition.
12. The process according to claim 11 , wherein the percentage by weight of terephthalic units, with respect to the sum of the terephthalic and isophthalic units, is between 55 and 70%, limits included.
13. The process according to claim 11 , wherein the PEKK is incorporated into the composition in a proportion of between 5 and 40%, limits included, by weight, with respect to the total weight of the composition.
14. The process according to claim 11 , wherein the PEKK is incorporated into the composition in a proportion of between 10 and 30%, limits included, by weight, with respect to the total weight of the composition.
15. An object manufactured from a composition according to claim 1 using a technology selected from the group consisting of laser sintering, moulding, injection moulding and extrusion.