Blends of polyphenylene ether sulfone and polyester carbonate
View Patent ↗Disclosed herein is a miscible, high flow composition comprising 80 to 99 wt % of a polyphenylene ether sulfone and 1 to 20 wt % of an aryl polyester carbonate copolymer, based on the combined weight of the polyphenylene ether sulfone and the aryl polyester carbonate copolymer.
1. A composition consisting of 80 to 99 wt % of a polyphenylene ether sulfone and 1 to 20 wt % of an aryl polyester carbonate copolymer which optionally comprises siloxane units, based on the combined weight of the polyphenylene ether sulfone and the aryl polyester carbonate copolymer, and optionally one or more additives wherein the one or more additives comprise an antioxidant, phosphorus containing stabilizer, colorant, light stabilizer, optical brightener, UV absorber, or mold release agent and wherein the composition has a melt volume viscosity rate (MVR) at 337° C. with 6.7 Kg, as measured by ASTM D1238, of greater than or equal to 8.5 cc/10 minutes, and a single glass transition temperature (Tg), as measured by ASTM D3418, of greater than or equal to 200 ° C. and the composition is free of any additional copolymer comprising siloxane units.
2. The composition of claim 1 , wherein the aryl polyester carbonate has a weight average molecular weight (Mw) of 5,000 to 80,000 Daltons.
3. The composition of claim 1 , wherein the composition has a multiaxial impact strength, as measured by ASTM D3763, of greater than or equal to 70 Joules.
4. The composition of claim 1 , wherein the polyphenylene ether sulfone and aryl polyester carbonate copolymer blend is transparent with a percent haze (%H) of less than or equal to 10% and a percent transmission (%T) of greater than or equal to 50 percent at 3.2 mm as measured according to ASTM D1003.
5. The composition of claim 1 , wherein greater than or equal to 50 mol % of the aryl polyester carbonate copolymer units are ester units derived from resorcinol, based on the total molar amount of all repeating units in the polymer.
6. The composition of claim 1 , wherein the composition comprises less than 0.1 wt % BPA polycarbonate based on the weight of the whole composition.
7. The composition of claim 1 , wherein the phosphorous containing stabilizer has a molecular weight greater than 200.
8. The composition of claim 1 , wherein the composition has a melt volume viscosity rate (MVR) at 337° C., using a six minute equilibration time, with 6.7 Kg, as measured by ASTM D1238, that is greater than or equal to 8.5 cc/10 minutes and wherein the melt viscosity rate, using an eighteen minute equilibration time at 300° C. with 6.7 Kg, is less than 30% higher than the 6 minute MVR value.
9. The composition of claim 8 , having a heat distortion temperature at 264 psi of greater than or equal to 175° C.
10. The composition of claim 1 , wherein the polyphenylene ether sulfone comprises repeating units having formula (1)
wherein R is hydrogen, alkyl, aryl, alkyl aryl, alkoxy, halogen or combination thereof, x equals 0 to 4, and n equals 25 to 1000.
11. The composition of claim 1 , wherein the aryl polyester carbonate copolymer comprises greater than or equal to 50 mol % of ester units of formula (6) based on the total molar amount of all repeating units in the copolymer
wherein D is a C6-20 alicyclic group or a C6-20 aromatic group; and T is a C6-20 alicyclic group, a C6-20 alkylene-arylene group, or a C6-20 arylene group.
12. The composition of claim 11 , wherein D is derived from resorcinol.
13. The composition of claim 12 , wherein the aryl polyester carbonate copolymer comprises greater than or equal to 80 mol % of ester units of formula (6).