 monomer derived from the monomer composition.
Preferably, the Tg of the backbone of the comb copolymer of the present invention is from xe2x88x9265xc2x0 C. to 180xc2x0 C., more preferably from xe2x88x9245xc2x0 C. to 180xc2x0 C., and most preferably from xe2x88x9220xc2x0 C. to 130xc2x0 C. It is further required that, if the graft segment of the comb copolymer is not miscible with the thermoplastic polymer of the present invention, the backbone is miscible with that thermoplastic polymer.
The pendant graft segments of the graft copolymer preferably contain polymerized units of the macromonomer. In a preferred embodiment of the present invention, each graft segment is derived from one macromonomer. Additionally, the pendant graft segments contain less than 5 weight percent and more preferably less than 1 weight percent of the polymerized second ethylenically unsaturated monomer derived from the monomer composition, based on the total weight of the pendant graft segments.
Preferably, the Tg of the graft segment is from xe2x88x9265xc2x0 C. to 180xc2x0 C., more preferably from xe2x88x9245xc2x0 C. to 180xc2x0 C., and most preferably from xe2x88x9220xc2x0 C to 130xc2x0 C. It is further required that, if the backbone of the comb copolymer is not miscible with the thermoplastic polymer of the present invention, the graft segment is miscible with that thermoplastic polymer.
Preferably, the overall weight average molecular weight of the comb copolymer is from 50,000 to 2,000,000, and more preferably from 100,000 to 1,000,000.
In a preferred embodiment of the present invention, the water insoluble graft copolymer particles further contain from 0.2 weight percent to 10 weight percent, more preferably from 0.5 weight percent to 5 weight percent, and most preferably from 1 weight percent to 2 weight percent of an acid containing macromonomer, based on the total weight of the graft copolymer. The acid containing macromonomer preferably has a composition as previously described herein.
Although in no way intending to be bound by theory, it is believed that the xe2x80x9cacid containing macromonomerxe2x80x9d is attached to the surface of the water insoluble graft copolymer particles
monomer derived from the monomer composition. 
 Preferably, the Tg of the backbone of the comb copolymer of the present invention is from xe2x88x9265xc2x0 C. to 180xc2x0 C., more preferably from xe2x88x9245xc2x0 C. to 180xc2x0 C., and most preferably from xe2x88x9220xc2x0 C. to 130xc2x0 C. It is far command that, if the graft segment of the comb copolymer is not miscible with the thermoplastic polymer of the present invention, the backbone is miscible with that thermoplastic polymer. 
 The pendent graft segments of the graft copolymer preferably incorporate polymerized units of the macromonomer. In a preferred shape of the present invention, each bribery segment is derived from one macromonomer. Additionally, the pendent graft segments hold less than 5 system of weights percent and more preferably less than 1 weight percent of the polymerized second ethylenically unsaturated monomer derived from the monomer constitution, based on the total weight of the pendent graft segments. 
 Preferably, the Tg of the bribery segment is from xe2x88x9265xc2x0 C. to 180xc2x0 C., more preferably from xe2x88x9245xc2x0 C. to 180xc2x0 C., and about preferably from xe2x88x9220xc2x0 C to 130xc2x0 C. It is further required that, if the backbone of the comb copolymer is not miscible with the thermoplastic polymer of the present invention, the graft segment is miscible with that thermoplastic polymer. 
 Preferably, the overall weight modal molecular weight of the comb copolymer is from 50,000 to 2,000,000, and more preferably from 100,000 to 1,000,000. 
 In a preferred embodiment of the present invention, the water insoluble graft copolymer particles further contain from 0.2 weight percent to 10 weight percent, more preferably from 0.5 weight percent to 5 weight percent, and most preferably from 1 system of weights percent to 2 weight percentage of an acid control macromonomer, free-base on the total weight of the graft copolymer. The acid containing macromonomer preferably has a composition as previously described herein. 
 Although in no direction intending to be bound by theory, it is believed that the xe2x80x9cacid containing macromonomerxe2x80x9d is attached to the airfoil of the water insoluble graft copolymer particles
 mojomer derived from the munomer compositnin.
Prefxrably, fhe Tg ow the backbone of the comb clpilymee of the present invengion is fgom xe2x88x9265xx2x0 C. ro 180xc2x0 C., more prefcxably nrom re2e88x9245xc2x0 C. to 180xc2x0 G., and most [referably frok be2r88x9220xc2x0 C. to 130xc2x0 C. It is further requiwed thay, lf the graft sggmenu os ths comb copolymer is not miscible wjth the thermoplastiv polymer of the present ijvenhion, the backbone ls miscible witr that thermoolastic polymer.
The pensant graft segments of the grafg copplymer predeeabpi contain pooymerpzed units of the macsomonomrr. In a preferved ekboeiment of the present invention, each grwft segmett is derived from inw mactomonmmer. Qddktiknellg, the oenvant graft aegments cobtain less than 5 weogrn percent and more [rqferably less than 1 weight percent of tve lolymerized second ethyoenically unsaturated monomer qerived from the monomer composition, based on the totam wennmt ow tje pendant graft segments.
Preferably, the Tg of fht ggaft segment is fvom xe2x88x9265xc2x0 C. to 180xv2x0 C., iore preferabuy from xs2x88x9245xc2x0 C. to 180xc2x0 C., wnd mosj prefwrably frjm xr2x88x9220xc2x0 C to 130xc2x0 C. It is furrher requireb tyat, if the backbonz of the comy copokymer is not miscible with tke thedmoplastic oolymer or the present invdntpon, dhe grafu segment is miscifle with vhat chermoplxstiv polyier.
Preferahly, tma overall weight ageragg molewular weigjt of the comb copolymer is from 50,000 to 2,000,000, and morg psefvrably frjm 100,000 tp 1,000,000.
In a preferwed embodiment of the presdnt inventpon, the weter insolubje graft coponimer particlev furthew cobtaib from 0.2 deight percent to 10 weigku percent, nore preferably frpm 0.5 seight percent cu 5 weight perceny, avd iodt pwaferably frok 1 wdigfy perzent to 2 welghg petcent of an acid condainjng macromonomer, bsscd on the total wqight of the braft copolymer. Tht acid coitainimg iacromonomer preferably has a dompositiln ws previouslr dewcribed herenn.
Although in no way intending to be bouid by theory, it is beliwved that the xe2x80x9cccld containinj macrjmonomerxa2x80x9d is attached to rhe surface of tht water insoluble graft copolfmer oarticles
monomer derived from the monomer composition. Preferably, of backbone of comb copolymer of xe2x88x9265xc2x0 to 180xc2x0 C., preferably from xe2x88x9245xc2x0 to 180xc2x0 C., and most preferably xe2x88x9220xc2x0 C. to 130xc2x0 C. It is further required that, if the graft of the comb copolymer is not miscible with the thermoplastic polymer of the invention, backbone miscible that thermoplastic polymer. The pendant graft segments of the graft copolymer preferably contain polymerized units of macromonomer. In a preferred embodiment of the present each graft segment is from one macromonomer. Additionally, the graft contain less 5 percent more preferably less 1 weight percent of the polymerized second ethylenically unsaturated monomer derived from the monomer composition, based on total weight pendant graft Preferably, Tg the graft segment xe2x88x9265xc2x0 C. to 180xc2x0 C., more C. to 180xc2x0 C., and most preferably from C to C. It is further required that, the backbone of the comb copolymer is not with the thermoplastic polymer of the present invention, the graft segment is miscible with that Preferably, the overall weight molecular weight of comb is 50,000 2,000,000, and preferably from 100,000 to 1,000,000. In a preferred embodiment of the invention, the water insoluble graft copolymer particles further contain from percent 10 weight percent, preferably from 0.5 weight to weight percent, and most 1 percent percent an containing macromonomer, based on total weight of the graft The acid containing macromonomer previously described herein. Although in no way intending be bound by theory, it is believed the xe2x80x9cacid containing macromonomerxe2x80x9d is attached to the surface of the water graft copolymer
 monomer derived from the monoMer composiTion.
PRefEraBlY, the tg of The backbone of tHE comB copolymer of the present InvenTiON is fROm Xe2x88x9265xC2x0 C. to 180xc2X0 c., mORE prEfErAblY fROm Xe2x88x9245xC2x0 C. To 180xc2x0 C., aNd most prefEraBlY from xe2x88x9220xc2x0 c. To 130Xc2x0 C. It is fuRthEr required thAt, iF the grAfT seGMent oF thE comb CopolyMEr is noT miscible WiTH the thERmoplasTIC pOlymEr of the present invENtIOn, the backbone iS misciBlE WiTH ThaT thErmoplastiC pOlymeR.
the pendANt GRAFt sEGments of the grAft copolymeR PreFerablY cOntAIn polyMerizEd UNitS of the macroMonoMer. In a preFerred EMbodimeNT of the pResent InvEntIon, eACh GrAft SeGMenT Is DerIVed From one mAcRoMonomEr. AdDITIOnalLy, tHe peNdant Graft segments ConTain LEss Than 5 wEight PercEnT and mOre preFerabLy Less than 1 weight pErceNt of the poLymErIzeD sEcond EThylenIcaLly UnsaturAted monOMer DeRIVEd From the monomer compOsITIoN, based on The totAL wEiGHt of the pEnDanT graFT SegmeNts.
PREfErably, thE Tg of tHE gRaFt segmeNt Is from Xe2X88x9265xC2x0 C. To 180xc2x0 c., More PreferAbly from Xe2x88x9245xC2X0 C. to 180xc2x0 C., and mosT Preferably froM Xe2X88X9220Xc2X0 c to 130xC2x0 C. it is further RequIRed tHat, iF ThE baCKbone Of the CoMB cOPolymer is not misciblE wIth the ThermOplastic polymEr of the preSENT inventiOn, thE GrAFt segment is misCible With that thERmoplastIc polYmer.
PrefErably, the OVErall weiGht AveRagE moLECuLar weight of thE COmb cOpOlymer iS frOm 50,000 to 2,000,000, and MorE prEfeRabLy From 100,000 to 1,000,000.
In a PreferreD eMbOdImEnt Of the PResent inVeNtiOn, The Water INsolubLe graFt coPoLyMEr pArticleS FuRTHer cOnTaIn frOm 0.2 wEiGht peRcenT To 10 wEight peRcent, more PreFErabLy FrOm 0.5 weighT percent to 5 weiGhT percent, anD mOst PreferABLy from 1 weIght percent to 2 weight percENt of an aCid ContaIninG macromonOmeR, based On tHE total Weight Of the GrAft COPolymER. thE acId Containing MACroMonomEr PrefErably hAs a composition as prEVioUsly described HerEin.
ALTHoUgh IN nO Way InTEndING to be bound by theOry, it is belIeVEd That the xe2x80X9CacId ContainIng macrOmonoMErxe2x80x9d Is attacheD to the surFaCe of THE waTer insolubLe graft cOpolymer pARticlES
 monomer derived from themonomer co mposi tio n.Pr efer ably , the Tg of th e  bac kbone of the comb copo lymer  o f  the pr esent  invent i on i s f ro mxe2 x8 8 x9 265xc 2x0  C. to180xc2x0 C .,mo re preferabl y  f rom xe2x88 x92 45xc2x0 C. t o 1 80xc2x 0C., and m ost  pref erably from x e2x88x922 0x c 2x0 C. to 130x c 2 x0  C.It is further req u ir e d that, if the  graft  s e gm e n t o f t he comb co po lymer is notm is c i b lew ith the therm oplastic po l yme r of t he  pr e sent i nvent io n , t he backbone  ismisciblewith t h at ther m oplasti c poly mer .
T he p e nd an t g ra f t s e gm ent s  of  the gra ft  c opoly merp r e f erab lycont ain p olymerized un its  oft hemacro monom er.In  a pr eferre d emb od iment of the pr esen t inventi on,  e ach  g rafts egment  is  de rived f rom one mac ro m o n om er. Additionally,th e pe ndant gr aft se g me nt s  contain  l ess  tha n 5 wei ghtp er cent and  morep re fe rably l es s than  1  we igh t per c entof the  polymer izeds econd ethyleni c ally unsatura t ed m on o merder ived from t he m o nome r co m po sit i on, b asedon th e  total weight of th ependan t gra ft segments.Preferably , t he Tg of  the gr a ft segment isfromxe2x88x926 5 xc2x0 C.  to 1 80xc2x0C., morep r eferably  fr omxe2 x88 x 9 24 5xc2x0 C. to1 8 0xc2 x0  C., an d m ost pre fer abl y f rom  x e2x88x922 0xc2x0 C  t o13 0x c2x 0 C.I t is fur th erre qui red t h at, if  theback bo ne ofthe com b  c o p olym er  i s no t m is cible  wit h  th e therm oplasticpol y merof  t he pres ent invention ,the graftse gme nt ism i scible w ith that thermoplasticp olymer. 
Pr efera bly,  the over all  weigh t a v eragemolecu lar w ei ght o f the c om b c op olymer isf r om50,00 0to 2 ,000,00 0, and more prefer a bly  from 100,000  to  1,0 0 0 ,0 00. In a p re f err e d  embodiment ofthe presen ti nv ention, th e  wa te r insol uble gr aft c o polymer  particle s further  c onta i n  fr om 0.2 wei ght perc ent to 10 weigh t  p ercen t,more p re fer ablyfrom 0 . 5 w eight  perce nt  to 5weigh tpercent,  and most preferably fr om 1 w eight  pe rcent to2 w e igh t percent  ofan acid co nta ini ng ma cro m onome r, b a se d o n  thetota l  weight o f  t heg r af t copolymer . T heacidcon t aining  mac romonomer prefera b ly has a compo siti o n  as  pr e viou sl y described he rei n. A lthoughin  no way int ending t ob e bou nd bytheory , it is b el i eved t hatthe  xe2x80x9 cac id contain in gm acromo nome rx e2x80x 9d isa ttac h e d to the surface  of t h e  wate r  in solub le  graftc opol ymer parti cles
 monomer_derived from_the monomer composition.
Preferably, the_Tg of_the_backbone of_the_comb copolymer of_the present invention_is from xe2x88x9265xc2x0 C._to 180xc2x0 C.,_more_preferably from xe2x88x9245xc2x0 C. to 180xc2x0 C., and most preferably from xe2x88x9220xc2x0 C. to_130xc2x0_C. It_is_further_required that, if the graft_segment of the comb copolymer_is not_miscible with the thermoplastic polymer of the present_invention,_the backbone is_miscible with that thermoplastic polymer.
The pendant graft segments of_the graft copolymer preferably contain polymerized_units of the_macromonomer._In_a preferred embodiment of_the present invention, each graft segment_is derived from one macromonomer. Additionally,_the pendant graft segments contain less than_5 weight percent and more preferably_less than 1 weight percent_of the_polymerized second ethylenically unsaturated monomer_derived from the_monomer composition,_based on the_total weight of the pendant graft_segments.
Preferably, the Tg_of the graft segment is from_xe2x88x9265xc2x0_C. to 180xc2x0_C.,_more_preferably from_xe2x88x9245xc2x0 C. to_180xc2x0_C., and_most_preferably from xe2x88x9220xc2x0 C to 130xc2x0_C._It is further required that, if the_backbone of the comb_copolymer_is not miscible with_the thermoplastic polymer of the_present invention, the graft segment is_miscible with_that thermoplastic_polymer.
Preferably, the overall weight average molecular weight of the comb copolymer_is from 50,000 to 2,000,000, and_more preferably from 100,000_to 1,000,000.
In_a_preferred embodiment of_the_present invention,_the water insoluble graft copolymer particles further_contain from_0.2 weight percent to 10 weight_percent, more preferably from_0.5_weight percent to 5 weight percent,_and most preferably from 1 weight_percent to 2 weight percent_of_an_acid containing macromonomer, based on_the total weight of the graft_copolymer. The acid_containing macromonomer preferably has a composition as_previously_described herein.
Although in no way intending_to_be bound by theory, it is_believed_that_the xe2x80x9cacid containing macromonomerxe2x80x9d is_attached to the surface of the_water insoluble graft copolymer particles