Composition based on poly (arylene ether ketone) having improved properties

Abstract

A composition based on poly(ether ether ketone) (PEEK) including poly(ether ketone ketone) (PEKK), wherein the poly(ether ketone ketone) (PEKK) includes 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 composition including 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 . Composition based on one of the following polymers: poly(ether ether ketone) (PEEK), poly(ether ketone) (PEK) or poly(ether ketone ether ketone ketone) (PEKEKK), and 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. 
     
     
         2 . The composition according to  claim 1 , characterized in that the PEKK can be 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, and preferably between 55 and 70%. 
     
     
         3 . Composition according to  claims 1  and  2 , characterized in that it comprises at least one filler and/or at least one additive. 
     
     
         4 . Composition according to any one of  claims 1 ,  2  and  3 , characterized in that the proportion by weight of PEEK in the composition is between 60 and 99%, limits included, preferably between 60 and 95% and more preferably still between 70 and 90%, with respect to the total weight of the composition. 
     
     
         5 . Process for improving the yield point and/or the elongation at break of a composition based on one of the following polymers: poly(ether ether ketone) (PEEK), poly(ether ketone) (PEK) or poly(ether ketone ether ketone ketone) (PEKEKK), the said process consisting in incorporating PEKK in the said composition, the said process being characterized in that 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 preferably between 55 and 70%, and in that the PEKK is incorporated in the said composition in proportions of between 1 and 40%, limits included, preferably between 5 and 40% and more preferably still between 10 and 30% by weight, with respect to the total weight of the composition. 
     
     
         6 . Object manufactured from a composition according to one of  claims 1  to  4  by a technology chosen from laser sintering, moulding, injection moulding or extrusion.