Polyimide resin compositions

Abstract

A thermoplastic composition comprises a polymer blend. The polymer blend comprises a first polyimide and a second polyimide. The first polyimide has repeating units derived from a first dianhydride and a first diamine. The second polyimide has repeating units derived from a second dianhydride and a second diamine. Either the first dianhydride and the second dianhydride are the same or the first diamine and the second diamine are the same.

1 . A thermoplastic composition comprising a non-delaminated polymer blend wherein the polymer blend comprises:
 a first polyimide comprising structural units derived from a first dianhydride and a first diamine; and   a second polyimide comprising structural units derived from a second dianhydride and a second diamine; and   wherein the first dianhydride and the second dianhydride are the same or the first diamine and the second diamine are the same.   
     
     
         2 . The thermoplastic composition of  claim 1 , wherein the polymer blend is a miscible polymer blend. 
     
     
         3 . The thermoplastic composition of  claim 1 , wherein the polymer blend is a compatible polymer blend. 
     
     
         4 . The thermoplastic composition of  claim 1 , wherein the first dianhydride and the second dianhydride are bis(ether anhydrides) and the first and second diamines have the formula:
   H 2 N—R 10 —NH 2   (IV)   
       wherein R 10  is a substituted or unsubstituted divalent organic moiety such as: an aromatic hydrocarbon moiety having 6 to 20 carbons and halogenated derivatives thereof; a straight or branched chain alkylene moiety having 2 to 20 carbons; a cycloalkylene moiety having 3 to 20 carbon atoms; or a divalent moiety of the general formula (V) 
       
         
           
           
               
               
           
         
       
       wherein Q is defined as a divalent moiety selected from the group consisting of —O—, —S—, —C(O)—, —SO 2 —, —SO—, and —C y H 2y — wherein y is an integer from 1 to 20. 
     
     
         5 . The thermoplastic composition of  claim 1 , wherein the first dianhydride and the second dianhydride are selected from the group consisting of bisphenol A dianhydride, oxydiphthalic anhydride (ODPA) and combinations thereof. 
     
     
         6 . The thermoplastic composition of  claim 1 , wherein the first diamine and the second diamine are selected from the group consisting of m-phenylenediamine, p-phenylenediamine, diamino diaryl sulfones and combinations thereof. 
     
     
         7 . The thermoplastic composition of  claim 1 , wherein first polyimide comprises structural units derived from oxydiphthalic anhydride (ODPA) and diamino diaryl sulfone (DAS) and the second polyimide comprises structural units derived from bisphenol-A dianhydride (BPADA) and diamino diarylsulfone (DAS). 
     
     
         8 . The thermoplastic composition of  claim 1 , wherein,
 the first polyimide is present in an amount of 50 to 99 weight percent;   the second polyimide is present in an amount of 1 to 50 weight percent; and   the thermoplastic composition further comprises 0 to 70 weight percent of a component selected from the group consisting of fillers, reinforcements, additives, and combinations thereof;   wherein the first polyimide, the second polyimide, and the component are present at a total weight percent of 100.   
     
     
         9 . The thermoplastic composition of  claim 1 , wherein the composition further comprises at least one polymer. 
     
     
         10 . The thermoplastic composition of  claim 9 , wherein the at least one polymer is selected from the group consisting of polyphenylene sulfone, polyetherimide, polysulfone, polycarbonate, polyphenylene ether, poly methyl methacrylate, acrylonitrile butadiene styrene, polystyrene, polyvinylchloride, perfluoroalkoxyalkane polymer, co-polymer of tetra fluoro ethylene and perfluorinated vinyl ether, fluorinated ethylene propylene polymer, poly(phenylene sulfide, poly(ether ketone), poly(ether-ether ketone), ethylene chloro trifluoro ethylene polymer, polyvinylidene fluoride, polytetrafluoroethylene, polyethylene terephthalate, polyacetal, polyamide, ultra high molecular weight polyethylene, polypropylene, polyethylene, high density polyethylene, low density polyethylene, polybenzimidizole, poly(amide-imide), poly(ether sulfone), poly(aryl sulfone), polyphenylenes, polybenzoxazoles, polybenzthiazoles and blends and co-polymers thereof. 
     
     
         11 . The thermoplastic composition of  claim 1 , wherein the polymer blend has a heat deflection temperature of greater than or equal to 150° C. according to ASTM D648. 
     
     
         12 . The thermoplastic composition of  claim 1 , wherein the polymer blend has a tensile strength greater than or equal to 70 MPa according to ASTM D638. 
     
     
         13 . The thermoplastic composition of  claim 1 , wherein the polymer blend has a coefficient of thermal expansion of less than or equal to 100 ppm/° C. from 30° C. to 200° C. as measured by thermal mechanical analysis with a thermal ramp rate of 5° C./minute. 
     
     
         14 . The thermoplastic composition of  claim 1 , wherein the polymer blend has a continuous use temperature greater than or equal to 150° C. 
     
     
         15 . A thermoplastic composition comprising a non-delaminated polymer blend wherein the polymer blend comprises:
 50 to 99 weight percent of a first polyimide comprising structural units derived from a first dianhydride and a first diamine; and   1 to 50 weight percent of a second polyimide comprising structural units derived from a second dianhydride and a second diamine;   wherein the first dianhydride and the second dianhydride are the same or the first diamine and the second diamine are the same,   wherein weight percent is based on the total weight of the polymer blend, and   wherein the polymer blend has a single glass transition temperature.   
     
     
         16 . The thermoplastic composition of  claim 15 , wherein the first dianhydride and the second dianhydride are bis(ether anhydrides) and the first and second diamines have the formula:
   H 2 N—R 10 —NH 2      
       wherein R 10  is a substituted or unsubstituted divalent organic moiety such as: an aromatic hydrocarbon moiety having 6 to 20 carbons and halogenated derivatives thereof; a straight or branched chain alkylene moiety having 2 to 20 carbons; a cycloalkylene moiety having 3 to 20 carbon atoms; or a divalent moiety of the general formula 
       
         
           
           
               
               
           
         
       
       wherein Q is defined as a divalent moiety selected from the group consisting of —O—, —S—, —C(O)—, —SO 2 —, —SO—, and —C y H 2y — wherein y is an integer from 1 to 20. 
     
     
         17 . The thermoplastic composition of  claim 15 , wherein the first dianhydride and the second dianhydride are selected from the group consisting of bisphenol A dianhydride, oxydiphthalic anhydride (ODPA) and combinations thereof. 
     
     
         18 . The thermoplastic composition of  claim 15 , wherein the first diamine and the second diamine are selected from the group consisting of m-phenylenediamine, p-phenylenediamine, diamino diaryl sulfones, and combinations thereof. 
     
     
         19 . The thermoplastic composition of  claim 15 , wherein first polyimide comprises structural units derived from oxydiphthalic anhydride (ODPA) and diamino diaryl sulfone (DAS) and the second polyimide comprises structural units derived from bisphenol-A dianhydride (BPADA) and diamino diarylsulfone (DAS). 
     
     
         20 . The thermoplastic composition of  claim 15 , wherein the thermoplastic composition further comprises 0 to 70 weight percent of a component selected from the group consisting of fillers, reinforcements, additives, and combinations thereof;
 wherein the first polyimide, the second polyimide, and the component are present at a total weight percent of 100.   
     
     
         21 . The thermoplastic composition of  claim 15 , wherein the composition further comprises at least one polymer. 
     
     
         22 . The thermoplastic composition of  claim 21 , wherein the at least one polymer is selected from the group consisting of polyphenylene sulfone, polyetherimide, polysulfone, polycarbonate, polyphenylene ether, poly methyl methacrylate, acrylonitrile butadiene styrene, polystyrene, polyvinylchloride, perfluoroalkoxyalkane polymer, co-polymer of tetra fluoro ethylene and perfluorinated vinyl ether, fluorinated ethylene propylene polymer, poly(phenylene sulfide, poly(ether ketone), poly(ether-ether ketone), ethylene chloro trifluoro ethylene polymer, polyvinylidene fluoride, polytetrafluoroethylene, polyethylene terephthalate, polyacetal, polyamide, ultra high molecular weight polyethylene, polypropylene, polyethylene, high density polyethylene, low density polyethylene, polybenzimidizole, poly(amide-imide), poly(ether sulfone), poly(aryl sulfone), polyphenylenes, polybenzoxazoles, polybenzthiazoles and blends and co-polymers thereof. 
     
     
         23 . The thermoplastic composition of  claim 15 , wherein the polymer blend has a heat deflection temperature of greater than or equal to 150° C. according to ASTM D648. 
     
     
         24 . The thermoplastic composition of  claim 15 , wherein the polymer blend has a tensile strength greater than or equal to 70 MPa according to ASTM D638. 
     
     
         25 . The thermoplastic composition of  claim 15 , wherein the polymer blend has a coefficient of thermal expansion of less than or equal to 100 ppm/° C. from 30° C. to 200° C. as measured by thermal mechanical analysis with a thermal ramp rate of 5° C./minute. 
     
     
         26 . The thermoplastic composition of  claim 15 , wherein the polymer blend has a continuous use temperature greater than or equal to 150° C. 
     
     
         27 . A thermoplastic composition comprising a polymer blend wherein the polymer blend comprises:
 50. to 95 weight percent of a first polyimide comprising structural units derived from a first dianhydride and a first diamine; and   to 50 weight percent of a second polyimide comprising structural units derived from a second dianhydride and a second diamine;   wherein the thermoplastic composition further comprises 0 to 70 weight percent of a component selected from the group consisting of fillers, reinforcements, additives, and combinations thereof,   wherein the first polyimide, the second polyimide, and the component are present at a total weight percent of 100;   wherein the first dianhydride and the second dianhydride are the same or the first diamine and the second diamine are the same,   wherein the polymer blend has greater than one glass transition temperature, and   wherein an article formed by injection molding the thermoplastic composition is essentially free from delamination after aging at 280° C. for 240 hours.   
     
     
         28 . The thermoplastic composition of  claim 27 , wherein the first dianhydride and the second dianhydride are bis(ether anhydrides) and the first and second diamines have the formula:
   H 2 N—R 10 —NH 2      
       wherein R 10  is a substituted or unsubstituted divalent organic moiety such as: an aromatic hydrocarbon moiety having 6 to 20 carbons and halogenated derivatives thereof; a straight or branched chain alkylene moiety having 2 to 20 carbons; a cycloalkylene moiety having 3 to 20 carbon atoms; or a divalent moiety of the general formula 
       
         
           
           
               
               
           
         
       
       wherein Q is defined as a divalent moiety selected from the group consisting of —O—, —S—, —C(O)—, —SO 2 —, —SO—, and —C y H 2y — wherein y is an integer from 1 to 20. 
     
     
         29 . The thermoplastic composition of  claim 27 , wherein the first dianhydride and the second dianhydride are selected from the group consisting of bisphenol A dianhydride, oxydiphthalic anhydride (ODPA), and combinations thereof. 
     
     
         30 . The thermoplastic composition of  claim 27 , wherein the first diamine and the second diamine are selected from the group consisting of m-phenylenediamine, p-phenylenediamine, diamino diaryl sulfones and combinations thereof. 
     
     
         31 . The thermoplastic composition of  claim 27 , wherein first polyimide comprises structural units derived from oxydiphthalic anhydride (ODPA) and diamino diaryl sulfone (DAS) and the second polyimide comprises structural units derived from bisphenol-A dianhydride (BPADA) and diamino diarylsulfone (DAS). 
     
     
         32 . A thermoplastic composition comprising a polymer blend wherein the polymer blend comprises:
 a first polyimide comprising structural units derived from a oxy diphthalic anhydride and a diamino diaryl sulfone;   a second polyimide comprising structural units derived from a bis-phenol A dianhydride and a diamino diaryl sulfone.   
     
     
         33 . The thermoplastic composition of  claim 32 , wherein the first polyimide is present in an amount of 10 to 90 weight percent, based on the total weight of the polymer blend and the second polyimide is present in an amount of 10 to 90 weight percent, based on the total weight of the polymer blend. 
     
     
         34 . The thermoplastic composition of  claim 32 , wherein the first polyimide is present in an amount of 50 to 90 weight percent, based on the total weight of the polymer blend and the second polyimide is present in an amount of 10 to 50 weight percent, based on the total weight of the polymer blend. 
     
     
         35 . A composition of matter comprising a non-delaminated article derived from the composition according to  claim 1 .