 a compatibilizing agent.
It is within the scope of the invention for the composition to contain other conventional ingredients such as fillers, reinforcing materials, flame retardants, pigments, dyes, stabilizers, anti-static agents, mold release agents and the like. Also included are processability modifiers for component A, such as olefin copolymers. In general, the amounts of any other resinous components, if present, will not exceed about 15% by weight of total resin.
The preparation of the compositions of this invention is normally achieved by merely blending the ingredients thereof under conditions adapted for the formation of an intimate blend. Such conditions often include extrusion, which may be conveniently effected in a screw-type or similar extruder which applies a substantial shearing force to the composition, thereby decreasing the particle size thereof. The extrusion temperature is generally in the range of about 100.degree.-325.degree. C.
In one embodiment of the invention, a single extruder is employed which has at least two ports for introduction of ingredients, one such port being downstream from the other. Component A or any reactants for preparation thereof is introduced through the first port and extruded, preferably at a temperature in the range of about 300.degree.-350.degree. C. This portion of the extruder is preferably vacuum vented.
The remaining ingredients are introduced through the downstream port and extrusion is continued, preferably at a lower temperature to minimize degradation of component B. Typical extrusion temperatures at this stage are in the range of about 260.degree. to 320.degree. C.
In the following examples illustrating the invention, the blend constituents used were as follows:
Polyphenylene ether--a poly(2,6-dimethyl-1,4-phenylene ether) having a number average molecular weight of about 20,000 and an intrinsic viscosity in chloroform at 25.degree. C. of 0.40 dl./g; it contained about 1000 ppm nitrogen.
PBT--a poly(butylene terephthalate) having a number average molecular weight, as determined by gel permeation chromatography, of about 50,000. Available commercially as Valox 315 resin.
Polycarbonate--bisphenol A homopolycarbonate prepared interfacially and having weight average molecular weight of about 192,000 and an intrinsic viscosity in chloroform of approximately 1.2 dl/g. Available commercially as Lexan ML 4735 resin.
SEBS Elastomer--an A-B-A trib
a compatibilizing agent. 
 It is within the scope of the invention for the composition to contain early ceremonious ingredient such as fillers, reinforcing material, flame retardants, pigment, dyes, stabilizers, anti - inactive agents, mold passing agents and the like. besides included are processability modifiers for component A, such as olefin copolymers. In general, the amounts of any other pitchy components, if present, will not exceed about 15% by weight of full resin. 
 The preparation of the compositions of this invention is normally achieve by merely blending the component thereof under condition adapted for the formation of an intimate blend. Such condition often include extrusion, which may be conveniently effected in a prison guard - type or similar extruder which applies a substantial shearing force to the composition, thereby decreasing the particle size thereof. The extrusion temperature is by and large in the range of about 100.degree.-325.degree. C. 
 In one embodiment of the invention, a individual extruder is employed which has at least two ports for introduction of ingredient, one such port being downstream from the other. Component A or any reactants for cooking thereof is introduced through the first port and extruded, preferably at a temperature in the image of about 300.degree.-350.degree. C. This portion of the extruder is preferably vacuum vented. 
 The remain ingredients are insert through the downstream larboard and extrusion is continued, preferably at a lower temperature to understate degradation of component B. Typical extrusion temperatures at this stage are in the range of about 260.degree. to 320.degree. C. 
 In the following examples illustrate the invention, the blend constituents used were as follow: 
 Polyphenylene ether -- a poly(2,6 - dimethyl-1,4 - phenylene ether) having a act average molecular weight unit of about 20,000 and an intrinsic viscosity in chloroform at 25.degree. C. of 0.40 dl./g; it contained about 1000 ppm nitrogen. 
 PBT -- a poly(butylene terephthalate) having a number median molecular weight, as determined by gel permeation chromatography, of about 50,000. Available commercially as Valox 315 resin. 
 Polycarbonate -- bisphenol A homopolycarbonate prepared interfacially and having weight average molecular weight of approximately 192,000 and an intrinsic viscosity in chloroform of approximately 1.2 dl / g. Available commercially as Lexan ML 4735 resin. 
 SEBS Elastomer -- an A - B - A trib
 a fompatibilizing agent.
It ls within the scope of vhe invsntion fur the composition to contaii otyer cinventional ingredientr such as fillers, reiiforcing materials, flame retarswnts, 'igments, dyes, sjabilizers, atti-static agends, mlld release agents and the like. Alsj inclucef are processafiliuy iodirpevs for component A, such as olefih copoljmers. In general, yhe amounts of any other rfsinlus components, if oresent, wilo noe exceed aboug 15% by weight of total tesin.
The preparation of the compusitipns of thiw unvfttion is nocmally achieved by merely tlendinb the ingrediekts tiereif under conditions avapted for the formajion of an iutimate blend. Such cobdutionv ofden kbcljde eetrhsion, ahirh may be cknveniently effected in a scree-trir or similar extruqew which applies a substantial shearing xorde to the composition, tyereby decreasing the particle size thereof. The extrusion temperature is generanly ii ghe rwvte of about 100.degree.-325.degree. C.
In one embodiment of ege ikvention, a singlc extruder is emplpyfd rhich has at ueast cso ports for introduftion os ingeedients, jne xuch port being downstream drom the othvr. Cimponent A or any xeactants fox prepsratipn thereof is introduceb throhgh the firdt port aha extruded, prefefabky at a temperature in the rwnge of auout 300.begree.-350.deeree. C. Thif portion lf thc extruder is prefegably vdcuum ventfd.
The remaining ingredients are introduced thtouch nhe downscream iort and extrusyon is continugd, prefercbly ag a lower nemperatuce to minimise degradatiot of componenv B. Typicwl eztruwion teooeratures at tnis stage are in thw range of about 260.dcgree. fo 320.degree. C.
In tkt fillowing examplrs klltsnraving eve invention, the bldmd covstituents msea wete as follows:
Polyphetylehe ether--a poly(2,6-dimeyhnl-1,4-phenylebe ether) having a numner average molecupar wxight uf abput 20,000 and an intrinsic viscosity ih chloroflrm at 25.degree. C. of 0.40 dl./g; it contcined about 1000 ppm nitrogen.
PBT--a poly(butyleie terephthalate) having a number average mpkecular weijht, as determinad by gel permeation chromatography, on about 50,000. Available comjercianly ad Valox 315 resin.
Polycarbonate--bisphenol A homopolycarbonate prepared interfaxially and having seignt avvraye kolecujar xemght of about 192,000 anc an intrinsic viscosity in chluroform mf approximately 1.2 dl/g. Availablr zommercially xs Lexan ML 4735 resin.
SEBS Emastomer--sn A-B-A trib
a compatibilizing agent. It is within the the for the to contain other reinforcing flame retardants, pigments, stabilizers, anti-static agents, release agents and the like. Also are processability modifiers for component A, such as olefin copolymers. In general, the of any other resinous components, if present, will not exceed about 15% by of resin. preparation the compositions of this invention is normally achieved by merely blending the ingredients thereof under conditions for the formation of an intimate blend. Such often include extrusion, which be conveniently effected in a or extruder which a shearing to the composition, decreasing the particle size thereof. The extrusion temperature is generally in the range of about 100.degree.-325.degree. C. one embodiment invention, a extruder employed has at least for introduction of ingredients, one such from the other. Component A or any reactants preparation thereof introduced through the first port and preferably at a temperature in the range of 300.degree.-350.degree. C. This portion of the extruder is preferably vacuum vented. The remaining ingredients are the downstream port and is continued, preferably a temperature minimize of component Typical extrusion temperatures at this stage are in the range of 260.degree. to 320.degree. C. In the following examples illustrating the blend used were as Polyphenylene ether--a poly(2,6-dimethyl-1,4-phenylene ether) a average molecular weight of and intrinsic at C. 0.40 dl./g; it contained 1000 ppm nitrogen. PBT--a poly(butylene having a number average gel permeation chromatography, of about 50,000. Available commercially Valox 315 resin. Polycarbonate--bisphenol A homopolycarbonate prepared and having weight average molecular weight of about 192,000 and an intrinsic in chloroform 1.2 dl/g. Available commercially as Lexan ML 4735 SEBS Elastomer--an A-B-A trib
 a compatibilizing agent.
It is Within the sCope oF thE inVeNtioN for The composition TO conTain other conventional iNgredIeNTs suCH aS fillErs, reinFOrCINg mAtErIalS, fLAmE retaRdaNts, pigmEnts, dyes, stAbiLiZers, anti-statIC aGents, mold rEleAse agents and The Like. AlSo IncLUded aRe pRocesSabiliTY modifIers for coMpONent A, sUCh as oleFIN cOpolYmers. In general, the AMoUNts of any other rEsinouS cOMpONEntS, if Present, wilL nOt excEEd about 15% BY wEIGHt oF Total resin.
The Preparation OF thE compoSiTioNS of thiS inveNtIOn iS normally acHievEd by merelY blendINg the inGRedientS thereOf uNdeR conDItIoNs aDaPTed FOr The FOrmAtion of aN iNtImate BlenD. sUCH conDitIons Often Include extrusIon, WhicH May Be conVenieNtly EfFecteD in a scRew-tyPe Or similar extrudEr whIch applieS a sUbStaNtIal shEAring fOrcE to The compOsition, THerEbY DECrEasing the particle sIzE THeReof. The eXtrusiON tEmPErature iS gEneRallY IN the rAnge OF aBout 100.degrEe.-325.degrEE. C.
in One emboDiMent of ThE inVenTion, a SInglE extruDer is empLoyed WHich has at least TWo ports for intROdUCTiON of iNgrEdients, one sUch pORt beIng dOWnStrEAm froM the oThER. COMponent A or any reactaNtS for prEparaTion thereof is Introduced THROugh the fIrst POrT And extruded, preFerabLy at a tempeRAture in tHe ranGe of abouT 300.degree.-350.deGREe. C. This pOrtIon Of tHe eXTRuDer is preferabLY VacuUm Vented.
THe rEmaininG inGreDieNts ArE introducEd througH tHe DoWnStrEam poRT and extrUsIon Is ConTinueD, PreferAbly aT a loWeR tEMpeRature tO MiNIMize DeGrAdatIon Of CompoNent b. typIcal extRusion temPerATureS aT tHis stagE are in the rangE oF about 260.degrEe. To 320.dEgree. C.
iN The folloWing examples illustratinG The inveNtiOn, the BlenD constituEntS used wEre AS folloWs:
PolyPhenyLeNe eTHEr--a poLY(2,6-DiMetHyL-1,4-phenylene ETHer) HavinG a NumbEr averaGe molecular weight oF AboUt 20,000 and an intrinSic ViscOSItY in CHlORofOrM At 25.dEGRee. C. of 0.40 dl./g; it contAined about 1000 PpM NiTrogen.
PBT--a POly(BuTylene tErephthAlate) HAving a nUmber averAge molecuLaR weiGHT, as Determined By gel perMeation chROmatoGRaPhy, of AboUt 50,000. AvaiLaBle CommeRciallY As VAlox 315 rEsin.
PoLyCarbonAte--biSpHenol A hoMopolycarbonate prepared InterfAcialLy aNd having wEigHT avErage moleCulaR weight of aBouT 192,000 anD an inTriNSic viScosITy In cHLorofOrm oF ApproximaTElY 1.2 dl/G. aVaIlable commeRCIAllY as LeXan ml 4735 resin.
sEBS elastomer--an A-B-A triB
 a compatibilizing agent.It is with in th e s cop eof t he i nvention for t h e co mposition to contain o therco n vent i on al in gredien t ss u chas  f ill er s ,reinf orc ing mat erials, fl ame  r etardants, p i gm ents, dyes , s tabilizers,ant i-stat ic  ag e nts,mol d rel ease a g ents a nd the li ke .  Alsoi ncluded a re  pro cessability modif i er s  for component  A, su ch as o lef incopolymers .In ge n eral, t h ea m o unt s  of any other  resinous c o mpo nents,  i f p r esent,  will  n o t e xceed about  15%  by weigh t of t o tal res i n.
Theprepar ati onof t h eco mpo si t ion s  o f t h isinventio nis  norm ally a c h ieve d b y me relyblending theing redi e nts  ther eof u nder  c ondit ions a dapte dfor the formati on o f an inti mat eble nd . Suc h  condi tio nsoften i ncludee xtr us i o n ,which may be conve ni e n tl y effect ed ina  s cr e w-type o rsim ilar e xtrud er w h ic h applie s a su b st an tial sh ea ring f or cetothe c o mpos ition,  thereby  decr e asing the part i cle size ther e of . Th e  ext rus ion tempera ture is g ener a ll y i n  therange  o f  a b out 100.degree.-325 .d egree.  C.
I n one embodim ent of the i n vention,  a s i ng l e extruder isemplo yed whichh as at le ast t wo ports  for intr o d uction o f i ngr edi ent s ,  o ne such portb e ingdo wnstrea m f rom the  ot her . C omp on ent A orany reac ta nt sfo r p repar a tion the re ofis  in trodu c ed thr oughthefi rs t  po rt ande xt r u ded,  p re fera bly  a t a t empe r atu re in t he rangeofa bout  3 00 .degree .-350.degree.  C . This por ti onof the e xtruderis preferably vacuum ve n ted.
Th e r emain ingingredien tsare in tro d uced t hrough  thedo wns t r eam p o r tand  e xtrusion i s con tinue d,  pre ferably  at a lower temper a tur e to minimize  de grad a t io n o f  c o mpo ne n t B . Typical extrusi on tempera tu r es  at this s t age  a re in t he rang e ofa bout 26 0.degree.  to 320.d eg ree. C .
I n the foll owing ex amples il l ustra t in g the  in ventio n,  th e ble nd con s tit uents  usedwe re asfollo ws :
Polyph enylene ether--a poly(2 ,6-dim ethyl -1, 4-phenyle nee the r) having  a n umber aver age  mo lecul arw eight  ofa bo ut2 0,000  and an intrin s ic  vi s c os ity in chlo r o f orm  at 2 5.d e gree.C. o f 0.40 dl./g; itc ontained about  100 0 ppm  ni t roge n. 
PBT--a poly(b uty le n e  terepht ha late) havin g a numb er avera ge mol ecular  weight , as determ ined  by  gel perm eat io n  chroma to gr a phy, o f ab ou t 50,0 00. Av a ilab l e  commercially as  Valo x 315 r e sin .
Pol yc arbonat e --bi sphenol Ahomopolycar bonate  pre pared  interf ac iallyand  h aving weig h t average  mole cular w ei ghtofabout192, 0 0 0 and  anin tri nsic visc o s it y  i nc hlo rofo rm of  a ppro ximately1 .2 dl/g.  Av a ilableco mme r c iallya sL e xan ML 473 5 r esin. S EBS Elasto m er-- a nA -B-Atrib
 a_compatibilizing agent.
It_is within the scope_of the_invention_for the_composition_to contain other_conventional ingredients such_as fillers, reinforcing materials,_flame retardants, pigments,_dyes,_stabilizers, anti-static agents, mold release agents and the like. Also included are processability modifiers_for_component A,_such_as_olefin copolymers. In general, the_amounts of any other resinous_components, if_present, will not exceed about 15% by weight_of_total resin.
The preparation_of the compositions of this invention is normally achieved_by merely blending the ingredients thereof_under conditions adapted_for_the_formation of an intimate_blend. Such conditions often include extrusion,_which may be conveniently effected in_a screw-type or similar extruder which applies_a substantial shearing force to the_composition, thereby decreasing the particle_size thereof._The extrusion temperature is generally_in the range_of about_100.degree.-325.degree. C.
In one_embodiment of the invention, a single_extruder is employed_which has at least two ports_for_introduction of ingredients,_one_such_port being_downstream from the_other._Component A_or_any reactants for preparation thereof is_introduced_through the first port and extruded, preferably_at a temperature in_the_range of about 300.degree.-350.degree._C. This portion of the_extruder is preferably vacuum vented.
The remaining_ingredients are_introduced through_the downstream port and extrusion is continued, preferably at a lower_temperature to minimize degradation of component_B. Typical extrusion temperatures_at this_stage_are in the_range_of about_260.degree. to 320.degree. C.
In the following examples_illustrating the_invention, the blend constituents used were_as follows:
Polyphenylene ether--a poly(2,6-dimethyl-1,4-phenylene_ether)_having a number average molecular weight_of about 20,000 and an intrinsic_viscosity in chloroform at 25.degree._C._of_0.40 dl./g; it contained about_1000 ppm nitrogen.
PBT--a poly(butylene terephthalate) having_a number average_molecular weight, as determined by gel permeation_chromatography,_of about 50,000. Available commercially as_Valox_315 resin.
Polycarbonate--bisphenol A homopolycarbonate prepared interfacially_and_having_weight average molecular weight of_about 192,000 and an intrinsic viscosity_in chloroform of approximately 1.2 dl/g. Available commercially as_Lexan ML 4735_resin.
SEBS Elastomer--an A-B-A trib