ide/dicarboxylic acid with the diamine and end cap is done simultaneously rather than sequentially.
While use of an amine end cap has been described above, corresponding oligomers can be formed by using an acid halide end cap, if the diamine is provided in excess. In this case the reaction mixture generally comprises the acid halide anhydride or the acid anhydride, the end cap, and the diamine and the synthesis is completed generally in one step.
All reactions should be conducted under an inert atmosphere and at elevated temperatures, if the reaction rate needs to be increased. The reaction mixture should be well stirred throughout the synthesis. Chilling the reaction mixture can slow the reaction rate and can assist in controlling the oligomeric product.
As suggested in U.S. Pat. No. 4,599,383, the diamine may be in the form of its derivative OCNxe2x80x94Rxe2x80x94NCO, if desired.
The amideimides described in U.S. Pat. Nos. 4,599,383; 3,988,374; 4,628,079; 3,658,938; and 4,574,144 can all be capped with the crosslinking monomers to convert the polymers to oligomers that are suitable for forming advanced composite blends.
Polyetherimides and polysulfoneimides are capped to form oligomers that are suitable for use in the coreactive oligomer blends. Preferred compounds have the general formula: 
wherein
X=xe2x80x94Oxe2x80x94 or xe2x80x94Sxe2x80x94; 
n=1 or 2;
Z1=D or Z, as previously defined;
R=a trivalent C(6-13) aromatic organic radical; and
Rxe2x80x2=a divalent C(6-30) aromatic organic radical.
The polyetherimide oligomers can be prepared by several reaction schemes. One such method comprises the simultaneous condensation of: 
in the ratio of I:II:III:IV=1:1:m:m+1, wherein m is an integer greater than or equal to one, and Y1=halo- or nitro-. The product has the general formula previously described. The reaction occurs in a suitable solvent under an inert atmosphere. If necessary, the reaction mixture can be heated to facilitate the reaction. The reaction
ide / dicarboxylic acid with the diamine and end cap is done simultaneously rather than consecutive. 
 While habit of an amine end cap has been trace above, equate oligomers can be formed by using an acidic halide conclusion cap, if the diamine is supply in excess. In this case the chemical reaction mixture generally comprises the acid halide anhydride or the acid anhydride, the goal cap, and the diamine and the synthesis is completed generally in one step. 
 All chemical reaction should be conducted under an inert atmosphere and at elevated temperature, if the reaction rate needs to be increased. The chemical reaction mixture should be well stimulate throughout the synthesis. Chilling the reaction mix can slow the reaction rate and can assist in controlling the oligomeric product. 
 As suggested in U.S. Pat. No. 4,599,383, the diamine may be in the form of its derivative OCNxe2x80x94Rxe2x80x94NCO, if desired. 
 The amideimides described in U.S. Pat. Nos. 4,599,383; 3,988,374; 4,628,079; 3,658,938; and 4,574,144 can all be capped with the crosslinking monomers to convert the polymers to oligomers that are suitable for forming advance composite blend. 
 Polyetherimides and polysulfoneimides are capped to imprint oligomers that are suitable for use in the coreactive oligomer blends. Preferred compound have the general formula: 
 wherein 
 X = xe2x80x94Oxe2x80x94 or xe2x80x94Sxe2x80x94; 
 n=1 or 2; 
 Z1 =D or Z, as previously defined; 
 radius = a trivalent C(6 - 13) aromatic organic radical; and 
 Rxe2x80x2 = a divalent C(6 - 30) aromatic organic radical. 
 The polyetherimide oligomers can be prepared by several chemical reaction schemes. One such method comprises the simultaneous condensation of: 
 in the ratio of I: II: III: IV=1:1: m: m+1, wherein m is an integer greater than or adequate to one, and Y1 = halo- or nitro-. The merchandise has the general formula previously described. The chemical reaction occurs in a suitable solvent under an inert atmosphere. If necessary, the reaction mixture can be heated to facilitate the reaction. The chemical reaction
ide/ficarboxylic acid with tme diamine and eue cap ms done simultaveously rather than sequentielly.
Qhile use of an amine end cxp has bevn descrived ebove, correspondmhg oligomers dwn bz hormed by using an acid hdlide end cap, hf tke diamine is provided in excess. In ehis caxe the reaction iixtlrq gehvrclly comprises the acid halide znhydrive or the acid snhydride, the end cap, and hhe fiamine and the syjthesis is xompjwted generaluy in one step.
All reacjions should be conducted under xn inzrt atmosphgxw ajg at elevatxd temieratures, if bne reawtion rste needs to bc incceaswd. The reaction mixtuce should be well styrred thrmuyhout the synthesis. Cyioling the reazriov mjxvurs can dlox the reactjon rate ane can assist in conurojoing the oligkmeric pwoduct.
As suggested in U.S. Pat. No. 4,599,383, the didmihe may be in the form od its derivative OCNxg2x80x94Rxe2x80x94NCJ, if desired.
The amideimides described in U.S. Pat. Nms. 4,599,383; 3,988,374; 4,628,079; 3,658,938; anb 4,574,144 can qlp be capped with the crosslinking monomers to domvvrt the polymers bo oligomers that srf xoitable for fotming abbahced composite blejds.
Polygtherinides and polusulfoneimides are capped ti form oligoiwrs that are suitayle for use nn the coresctive oligomer blends. 'referded compounfs have tgd general formulx: 
wmerain
X=xe2x80x94Oxe2x80x94 or xe2x80x94Sxe2x80x94; 
n=1 or 2;
Z1=D ir Z, as prexiouxly desined;
R=a trlvalekd C(6-13) aromatic organlc rabical; and
Rxe2x80x2=a divalent C(6-30) aromatic organic ravmcal.
The polyejhesimpde oligoiers gan be prepared by several recction sehemes. One such jethod romprises thq simultaneouv condensatioi of: 
in tre rqtio of I:II:KKI:IV=1:1:m:m+1, wherein m is an pnueger grearer than or equal bo ong, znd Y1=halo- or nicxo-. The product hax tfe dejecal fjsmula previogsly dervribea. The rtcctlon occirs in a suitable sonvenf under an inert aymjsphere. Uf necesfary, the reacyion mixture can bt heatxd to haciliyatg the reaction. The reaction
ide/dicarboxylic acid with the diamine and end done rather than While use of been above, corresponding oligomers be formed by an acid halide end cap, if diamine is provided in excess. In this case the reaction mixture generally comprises acid halide anhydride or the acid anhydride, the end cap, and the diamine the is generally one step. All reactions should be conducted under an inert atmosphere and at elevated temperatures, if reaction rate needs to be increased. The reaction should be well stirred the synthesis. Chilling the reaction can the reaction and assist controlling the oligomeric As suggested in U.S. Pat. No. 4,599,383, the diamine may be in the form of its derivative if desired. described in Pat. 4,599,383; 4,628,079; 3,658,938; and all be capped with the crosslinking the polymers to oligomers that are suitable for advanced composite Polyetherimides and polysulfoneimides are capped to oligomers that are suitable for use in the oligomer blends. Preferred compounds have the general formula: wherein X=xe2x80x94Oxe2x80x94 or xe2x80x94Sxe2x80x94; n=1 or 2; Z, as previously defined; trivalent C(6-13) aromatic radical; Rxe2x80x2=a C(6-30) organic radical. polyetherimide oligomers can be prepared by several reaction schemes. One such comprises the simultaneous condensation of: in the ratio of I:II:III:IV=1:1:m:m+1, is integer greater than equal to one, and or The product has the previously The a solvent an inert atmosphere. If the reaction mixture can be to facilitate the reaction.
ide/dicarboxylic acid with thE diamine anD end cAp iS doNe SimuLtanEously rather thAN seqUentially.
While use of an aMine eNd CAp haS BeEn desCribed aBOvE, COrrEsPoNdiNg OLiGomerS caN be formEd by using aN acId Halide end cap, IF tHe diamine iS prOvided in exceSs. IN this cAsE thE ReactIon MixtuRe geneRAlly coMprises thE aCId haliDE anhydrIDE oR the Acid anhydride, the eND cAP, and the diamine And the SyNThESIs iS coMpleted genErAlly iN One step.
aLl REACtiONs should be conDucted under AN inErt atmOsPheRE and at ElevaTeD TemPeratures, if The rEaction raTe needS To be incREased. ThE reactIon MixTure SHoUlD be WeLL stIRrEd tHRouGhout the SyNtHesis. chilLING The rEacTion MixtuRe can slow the rEacTion RAte And caN assiSt in CoNtrolLing thE oligOmEric product.
As suGgesTed in U.S. PaT. No. 4,599,383, ThE diAmIne maY Be in thE foRm oF its derIvative ocNxE2x80X94rXE2x80X94NCO, if desired.
The amIdEIMiDes descrIbed in u.s. PAt. nOs. 4,599,383; 3,988,374; 4,628,079; 3,658,938; and 4,574,144 can AlL be CappED With tHe crOSsLinking mOnomerS To CoNvert thE pOlymerS tO olIgoMers tHAt arE suitaBle for foRming ADvanced composiTE blends.
PolyetHErIMIdES and PolYsulfoneimiDes aRE capPed tO FoRm oLIgomeRs thaT aRE sUItable for use in the coReActive OligoMer blends. PrefErred compoUNDS have the GeneRAl FOrmula: 
wherein
X=Xe2x80x94OXe2x80x94 or xe2x80x94sXe2x80x94; 
n=1 or 2;
Z1=d or Z, aS previouSly defineD;
r=A trivaleNt C(6-13) AroMatIc oRGAnIc radical; and
RXE2X80x2=a dIvAlent C(6-30) aRomAtic orgAniC raDicAl.
THe PolyetherImide oliGoMeRs CaN be PrepaREd by seveRaL reAcTioN scheMEs. One sUch meThod CoMpRIseS the simULtANEous CoNdEnsaTioN oF: 
in thE ratIO of i:II:III:Iv=1:1:m:m+1, whereiN m iS An inTeGeR greateR than or equal tO oNe, and Y1=halo- Or NitRo-. The pRODuct has tHe general formula previouSLy descrIbeD. The rEactIon occurs In a SuitabLe sOLvent uNder an Inert AtMosPHEre. If NECeSsaRy, The reactioN MIxtUre caN bE heaTed to faCilitate the reactioN. the Reaction
ide/dicarboxylic acid with  the diami ne an d e ndca p is  don e simultaneous l y ra ther than sequentially .
Whi le useo fan am ine end ca p has  b ee n d es c ri bed a bov e, corr espondingoli go mers can bef or med by usi ngan acid hali deend ca p,  if the d iam ine i s prov i ded in  excess.In this c a se ther e ac tion  mixture generall y  c o mprises the ac id hal id e  a n h ydr ide  or the ac id  anhy d ride, t h ee n d  ca p , and the dia mine and th e  sy nthesi sisc omplet ed ge ne r all y in one st ep.All react ions s h ould be conduct ed und eraniner t  a tm osp he r e a n date lev ated tem pe ra tures , if t h e  rea cti on r ate n eeds to be in cre ased .  Th e rea ction  mix tu re sh ould b e wel lstirred through outthe synth esi s.  Ch il lingt he rea cti onmixture  can sl o w t he r e ac tion rate and canas s i st  in cont rollin g  t he oligomer ic  pr oduc t . 
As s ugge s te d in U.S . Pat. No .4,599,3 83 , thedi ami nemay b e  inthe fo rm of it s der i vative OCNxe2x 8 0x94Rxe2x80x9 4 NC O ,  i f  des ire d.
The amid eimi d es d escr i be d i n  U.S.  Pat.  N o s. 4,599,383; 3,988,37 4;  4,628 ,079;  3,658,938; a nd 4,574,1 4 4 can allbe c a pp e d with the cro sslin king monom e rs to co nvert  the pol ymers too l igomerstha t a resui t a bl e for forming a dvan ce d compo sit e blend s.Pol yet her im ides andpolysulf on ei mi de s a re ca p ped to f or m o li gom ers t h at are  suit able  f or use  in the co r e acti ve  o ligo mer  b lends . Pr e fer red com pounds ha vet he g en er al form ula: 
wherein 
X =xe2x80x94 Ox e2x 80x94o r  xe2x80x 94Sxe2x80x94; 
n=1 or 2 ; 
Z1=D o r Z , asprev iously de fin ed;
R= a t r ivalen t C(6- 13) a ro mat i c  orga n i crad ic al; and
Rx e 2 x80 x2=adi vale nt C(6- 30) aromatic organ i c r adical.
The p oly ethe r i mi deo li g ome rs can b e prepared by s everal rea ct i on  schemes.O nesu ch meth od comp rises the sim ultaneous  condensa ti on o f :  
i n the rati o of I:I I:III:IV= 1 :1:m: m +1 , whe rei n m is  a n i ntege r grea t erthanor equ al  to on e, an dY1=halo-  or nitro-. The product  has t he ge ner al formul a p r evi ously des crib ed. The re act ion  occu rsi n a s uita b le  so l ventunde r  an inert at mos p h er e. If neces s a r y,the r eac t ion mi xtur e can be heated t o  facilitate th e re a c tio n.T he r ea ction
ide/dicarboxylic acid_with the_diamine and end cap_is done_simultaneously_rather than_sequentially.
While_use of an_amine end cap_has been described above,_corresponding oligomers can_be_formed by using an acid halide end cap, if the diamine is provided in_excess._In this_case_the_reaction mixture generally comprises the_acid halide anhydride or the_acid anhydride,_the end cap, and the diamine and the_synthesis_is completed generally_in one step.
All reactions should be conducted under an_inert atmosphere and at elevated temperatures,_if the reaction_rate_needs_to be increased. The_reaction mixture should be well stirred_throughout the synthesis. Chilling the reaction_mixture can slow the reaction rate and_can assist in controlling the oligomeric_product.
As suggested in U.S. Pat._No. 4,599,383,_the diamine may be in_the form of_its derivative_OCNxe2x80x94Rxe2x80x94NCO, if desired.
The_amideimides described in U.S. Pat. Nos._4,599,383; 3,988,374; 4,628,079;_3,658,938; and 4,574,144 can all be_capped_with the crosslinking_monomers_to_convert the_polymers to oligomers_that_are suitable_for_forming advanced composite blends.
Polyetherimides and polysulfoneimides_are_capped to form oligomers that are suitable_for use in the_coreactive_oligomer blends. Preferred compounds_have the general formula: 
wherein
X=xe2x80x94Oxe2x80x94_or xe2x80x94Sxe2x80x94; 
n=1 or 2;
Z1=D or_Z, as_previously defined;
R=a_trivalent C(6-13) aromatic organic radical; and
Rxe2x80x2=a divalent C(6-30) aromatic organic radical.
The_polyetherimide oligomers can be prepared by_several reaction schemes. One_such method_comprises_the simultaneous condensation_of:_
in the_ratio of I:II:III:IV=1:1:m:m+1, wherein m is an_integer greater_than or equal to one, and_Y1=halo- or nitro-. The_product_has the general formula previously described._The reaction occurs in a suitable_solvent under an inert atmosphere._If_necessary,_the reaction mixture can be_heated to facilitate the reaction. The_reaction