THERMOPLASTIC POLY(ARYLENE ETHER)/POLYAMIDE BLENDS AND METHOD OF MAKING
A thermoplastic composition comprises: a compatibilized blend of a poly(arylene ether), an aliphatic-aromatic polyamide and a polymeric compatibilizer; and an impact modifier; wherein the aliphatic-aromatic polyamide is composed of units derived from a dicarboxylic acid and units derived from a diamine and the units derived from a dicarboxylic acid comprise 60 to 100 mol % of units derived from terephthalic acid and the units derived from a diamine comprise 60 to 100 mol % of units derived from 1,9-nonanediamine, 2-methyl-1,8-octanediamine, or a combination of 1,9-nonanediamine and 2-methyl-1,8-octanediamine.
1 . A thermoplastic composition comprising:
a compatibilized blend of a poly(arylene ether), an aliphatic-aromatic polyamide and a polymeric compatibilizer; and
an impact modifier;
wherein the aliphatic-aromatic polyamide is composed of units derived from a dicarboxylic acid and units derived from a diamine and the units derived from a dicarboxylic acid comprise 60 to 100 mol % of units derived from terephthalic acid and the units derived from a diamine comprise 60 to 100 mol % of units derived from 1,9-nonanediamine, 2-methyl-1,8-octanediamine, or a combination of 1,9-nonanediamine and 2-methyl-1,8-octanediamine.
2 . The thermoplastic composition of claim 1 , wherein the composition comprises a dispersed phase and a continuous phase and the dispersed phase comprises poly(arylene ether) and has a mean domain size of 0.5-3 micrometers.
3 . The thermoplastic composition of claim 1 , wherein the aliphatic-aromatic polyamide, prior to forming the composition, has an amine end group less than 45 micromoles per gram of polyamide.
4 . The thermoplastic composition of claim 1 , wherein the poly(arylene ether) is present in an amount of 5 to 60 weight percent, the aliphatic-aromatic polyamide is present in an amount of 35 to 80 weight percent, the impact modifier is present in an amount of 5 to 22 weight percent, and the polymeric compatibilizer is present in an amount of 0.1 to 20 weight percent, based on the total weight of the composition.
5 . The thermoplastic composition of claim 1 , wherein the polymeric compatibilizer comprises an epoxy functionalized polyolefin, an epoxy functionalized poly(alkenyl aromatic) resin or a combination thereof.
6 . The thermoplastic composition of claim 1 , wherein the composition has a notched Izod impact strength at 23° C. that is greater than or equal to 5 kilojoules per square meter as determined by ISO 180/A and an elongation at break greater than or equal to 9% as determined by ISO 527.
7 . The thermoplastic composition of claim 1 , wherein the composition further comprises reinforcing filler, electrically conductive filler or a combination thereof.
8 . A thermoplastic composition produced by melt blending:
an aliphatic-aromatic polyamide;
a poly(arylene ether) wherein a portion of the poly(arylene ether) is functionalized poly(arylene ether);
an impact modifier; and
a polymeric compatibilizer having an average of greater than or equal to 3 epoxy groups per molecule;
wherein the aliphatic-aromatic polyamide is composed of units derived from a dicarboxylic acid and units derived from a diamine and the units derived from a dicarboxylic acid comprise 60 to 100 mol % of units derived from terephthalic acid and the units derived from a diamine comprise 60 to 100 mol % of units derived from 1,9-nonanediamine, 2-methyl-1,8-octanediamine, or a combination of 1,9-nonanediamine and 2-methyl-1,8-octanediamine.
9 . The thermoplastic composition of claim 8 , wherein the composition comprises a dispersed phase and a continuous phase and the dispersed phase comprises poly(arylene ether) and has a mean domain size of 0.5-3 micrometers.
10 . The thermoplastic composition of claim 8 , wherein the aliphatic-aromatic polyamide, prior to forming the composition, has an amine end group less than 45 micromoles per gram of polyamide.
11 . The thermoplastic composition of claim 8 , wherein the poly(arylene ether) is present in an amount of 5 to 60 weight percent, the aliphatic-aromatic polyamide is present in an amount of 35 to 80 weight percent, the impact modifier is present in an amount of 5 to 22 weight percent, and the polymeric compatibilizer is present in an amount of 0.1 to 20 weight percent, based on the total weight of the composition.
12 . The thermoplastic composition of claim 8 , wherein the polymeric compatibilizer comprises an epoxy functionalized polyolefin, an epoxy functionalized poly(alkenyl aromatic) resin or a combination thereof.
13 . The thermoplastic composition of claim 8 , wherein the composition has a notched Izod impact strength at 23° C. that is greater than or equal to 5 kilojoules per square meter as determined by ISO 180/A and an elongation at break greater than or equal to 9% as determined by ISO 527.
14 . The thermoplastic composition of claim 8 , wherein the composition further comprises reinforcing filler, electrically conductive filler or a combination thereof.
15 . A thermoplastic composition produced by melt blending:
an aliphatic-aromatic polyamide;
a poly(arylene ether);
an impact modifier;
a functionalizing agent; and
a polymeric compatibilizer having an average of greater than or equal to 3 epoxy groups per molecule,
wherein the aliphatic-aromatic polyamide is composed of units derived from a dicarboxylic acid and units derived from a diamine and the units derived from a dicarboxylic acid comprise 60 to 100 mol % of units derived from terephthalic acid and the units derived from a diamine comprise 60 to 100 mol % of units derived from 1 ,9-nonanediamine, 2-methyl-1,8-octanediamine, or a combination of 1,9-nonanediamine and 2-methyl-1,8-octanediamine.
16 . The thermoplastic composition of claim 15 , wherein the composition comprises a dispersed phase and a continuous phase and the dispersed phase comprises poly(arylene ether) and has a mean domain size of 0.5-3 micrometers.
17 . The thermoplastic composition of claim 15 , wherein the aliphatic-aromatic polyamide, prior to forming the composition, has an amine end group less than 45 micromoles per gram of polyamide.
18 . The thermoplastic composition of claim 15 , wherein the poly(arylene ether) is present in an amount of 5 to 60 weight percent, the aliphatic-aromatic polyamide is present in an amount of 35 to 80 weight percent, the impact modifier is present in an amount of 5 to 22 weight percent, and the polymeric compatibilizer is present in an amount of 0.1 to 20 weight percent, based on the total weight of the composition.
19 . The thermoplastic composition of claim 15 , wherein the functionalizing agent comprises fumaric acid, maleic anhydride, citric acid or a combination of two or more of the foregoing.
20 . The thermoplastic composition of claim 15 , wherein the polymeric compatibilizer comprises an epoxy functionalized polyolefin, an epoxy functionalized poly(alkenyl aromatic) resin or a combination thereof.
21 . The thermoplastic composition of claim 15 , wherein the composition further comprises reinforcing filler, electrically conductive filler or a combination thereof.