Blends of polyphenylene ether sulfone and silicone polyester carbonate

Abstract

Disclosed herein is a composition comprising a polyphenylene ether sulfone and a resorcinol based silicone aryl polyester carbonate copolymer wherein greater than or equal to 50 mol % of copolymer repeating units are ester units derived from resorcinol, based on the total molar amount of all repeating units in the polymer and wherein the blend has less than 1 weight percent polycarbonate, based on the total weight of the composition, has FAR 25.853 peak heat release of less than 60 KW/m 2 and time to peak heat release of greater than or equal to 120 seconds.

1 . A composition comprising a polyphenylene ether sulfone and a resorcinol based silicone aryl polyester carbonate copolymer wherein greater than or equal to 50 mol % of copolymer repeating units are ester units derived from resorcinol, based on the total molar amount of all repeating units in the polymer and wherein the blend comprises less than 1 weight percent polycarbonate, based on the total weight of the composition, has FAR 25.853 peak heat release of less than 60 KW/m 2  and time to peak heat release of greater than or equal to 120 seconds. 
     
     
         2 . The composition of  claim 1 , wherein the composition has a melt volume viscosity rate (MVR) at 300° C. using a six minute equilibration time, with 6.7 Kg, as measured by ASTM D1238, of greater than or equal to 1.5 cc/10 minutes. 
     
     
         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 is present in an amount of 70 to 99 wt % and the resorcinol based silicone aryl polyester carbonate copolymer is present in an amount of 1 to 30 wt %, based on the total weight of the composition. 
     
     
         5 . The composition of  claim 1 , wherein greater than or equal to 80 mol % of copolymer repeating units are ester units derived from resorcinol, based on the total molar amount of all repeating units in the polymer and wherein the blend has FAR 25.853 peak heat release of less than 50 KW/m 2  and time to peak heat release of greater than or equal to 140 seconds. 
     
     
         6 . The composition of  claim 1 , wherein the polyphenylene ether sulfone is present in an amount of 80 to 99 wt % and the resorcinol based silicone aryl polyester carbonate copolymer is present in an amount of 1 to 20 wt %, based on the total weight of the composition. 
     
     
         7 . The composition of  claim 6 , wherein the composition has a percent transmittance (% T) greater than or equal to 50% and a percent haze of less than or equal to 10% at 3.2 millimeters as per ASTM method D1003. 
     
     
         8 . The composition of  claim 1  wherein the resorcinol based silicone aryl polyester carbonate copolymer has a weight average molecular weight (Mw) of 5,000 to 80,000 daltons. 
     
     
         9 . The composition of  claim 1 , wherein the resorcinol based silicone aryl polyester carbonate copolymer has a silicone content of 1 to 40 wt %, based on the total weight of the copolymer and the copolymer comprises a siloxane unit of formula (15) 
       
         
           
           
               
               
           
         
         wherein R is methyl and E has an average value of 5 to 50. 
       
     
     
         10 . The composition of  claim 1  further comprising 0.1 to 20% by weight, based on the total weight of the composition, of one or more metal oxides. 
     
     
         11 . The composition of  claim 10  wherein the metal oxide is titanium dioxide with a particle size of 3 to 20 micrometers. 
     
     
         12 . The composition of  claim 1  further comprising a fluoropolymer. 
     
     
         13 . The composition of  claim 1  further comprising a boron compound. 
     
     
         14 . The composition of  claim 1  further comprising a brominated flame retardant selected from the group consisting of brominated polycarbonates, brominated epoxy resins, brominated polystyrenes, brominated aryl acrylates, brominated phthalimides, and mixtures thereof. 
     
     
         15 . The composition of  claim 1  wherein the polyphenylene ether sulfone comprises repeating units of 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, or, more specifically, n equals 25 to 500, or, more specifically, n equals 25 to 100. 
       
     
     
         16 . The composition of  claim 1  wherein the polyphenylene ether sulfone has a weight average molecular weight of 20,000 to 70,000 g/mol. 
     
     
         17 . The composition of  claim 1  wherein the composition has a melt volume viscosity rate (MVR) at 300° C., using a six minute equilibration time, with 6.7 Kg, as measured by ASTM D1238, that is greater than or equal to 1.5 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. 
     
     
         18 . The composition of  claim 1 , wherein the resorcinol based silicone aryl polyester carbonate copolymer comprises a siloxane unit of formula (19) 
       
         
           
           
               
               
           
         
         wherein each R independently is a C 1-13  alkyl group, C 1-13  alkoxy group, C 2-13  alkenyl group, C 2-13  alkenyloxy group, C 3-6  cycloalkyl group, C 3-6  cycloalkoxy group, C 6-14  aryl group, C 6-10  aryloxy group, C 7-13  arylalkyl group, C 7-13  arylalkoxy group, C 7-13  alkylaryl group, or C 7-13  alkylaryloxy group, E has an average value of 5 to 50, each R 3  is independently a divalent C 2-8  aliphatic group, each M is independently a halogen, cyano, nitro, C 1-8  alkylthio, C 1-8  alkyl, C 1-8  alkoxy, C 2-8  alkenyl, C 2-8  alkenyloxy group, C 3-8  cycloalkyl, C 3-8  cycloalkoxy, C 6-10  aryl, C 6-10  aryloxy, C 7-12  arylalkyl, C 7-12  arylalkoxy, C 7-12  alkylaryl, or C 7-12  alkylaryloxy, and each n is independently 0, 1, 2, 3, or 4. 
       
     
     
         19 . The composition of  claim 18 , wherein n is 0 and R 3  is a C 3  aliphatic group. 
     
     
         20 . The composition of  claim 18 , wherein n is 1, M is C 1-8  alkoxy, and R 3  is a C 3  aliphatic group. 
     
     
         21 . A composition consisting of 80 to 99 weight percent of a polyphenylene ether sulfone; 1 to 20 weight percent of a resorcinol based silicone aryl polyester carbonate copolymer wherein greater than or equal to 80 mol % of copolymer repeating units are ester units derived from resorcinol, based on the total molar amount of all repeating units in the polymer; 0.001 to about 2 weight percent of a phosphorus containing stabilizers; and 0 to 20 weight percent of a metal oxide, wherein weight percent is based on the total weight of the composition.