 U.S. and therefore perfluoroalkyl carboxylic acid is a compound which should be avoided from the viewpoint of safety.
Furthermore, as polyfunctional urethane acrylate having a fluorinated alkyl group, for example, a polycondensed reaction product of isophorone diisocyanate, mono- or di-alcohol having a fluorinated alkyl group, and polyfunctional acrylate monomer having a hydroxyl group has been proposed (for example, please refer to Japanese Unexamined Patent Application, First Publication, 2002-145936, pages 3 to 5. Hereinafter, the document is cited as patent document 2). Since the compound proposed in patent document 2 is a compound wherein a perfluoroalkyl group is not combined directly with a carbon atom in a carbonyl group, deterioration of a cured product due to hydrolysis is not caused easily. However, the compound has a structure in which an acrylate portion (crosslinking point) bonds with a fluorinated alkyl group via isophorone diisocyanate. Accordingly, a molecular weight of the compound per molecule is large, and the functional group density of a (meth)acryloyl group is low and the mechanical characteristics of a cured product become insufficient.
Furthermore, as a method for manufacturing a polyfunctional urethane acrylate having a fluorinated alkyl group, methods are proposed in which said acrylate is produced by using diepoxide having a fluorinated alkyl group or diol having a fluorinated alkyl group as a raw material (for example, please refer to Japanese Unexamined Patent Application, First Publication, 9-301925, pages 3 to 5, and Japanese Unexamined Patent Application, First Publication, 2001-072646, pages 3 to 4.) Hereinafter, the documents are cited as patent documents 3 and 4). However, since there are acryloyl groups (crosslinking point) at both terminal ends of a fluorinated alkylene chain via the residues of a hydroxyl group or an epoxy group in both documents, a fluorinated alkylene chain is incorporated in a network structure of a cured product. Accordingly, the surface properties originated from a fluorine atom are not sufficient, since it is difficult for a fluorine atom to exist on the surface of the cured product effectively and —CF3, which can contribute to decrease surface tension, does not exist on the surface.
Moreover, for example, a reactant which is obtained by reacting fluorine-containing acrylate, which has a hydroxyl group, and isocyanate having an acryloyl group
U.S. and therefore perfluoroalkyl carboxylic acid is a compound which should be avoided from the viewpoint of safety. 
 Furthermore, as polyfunctional urethane propenoate have a fluorinated alkyl group, for example, a polycondensed reaction merchandise of isophorone diisocyanate, mono- or di - alcohol have a fluorinated alkyl group, and polyfunctional acrylate monomer having a hydroxyl group has been proposed (for exercise, please consult to Japanese Unexamined Patent Application, First Publication, 2002 - 145936, pages 3 to 5. Hereinafter, the document is cited as patent document 2). Since the compound nominate in patent document 2 is a compound wherein a perfluoroalkyl group is not combined immediately with a carbon atom in a carbonyl group, deterioration of a cured product due to hydrolysis is not caused easily. However, the compound has a structure in which an acrylate part (crosslinking point) bonds with a fluorinated alkyl group via isophorone diisocyanate. Accordingly, a molecular weight unit of the compound per molecule is large, and the functional group density of a (meth)acryloyl group is abject and the mechanical characteristics of a cured product become insufficient. 
 Furthermore, as a method for manufacturing a polyfunctional urethane propenoate having a fluorinated alkyl group, methods are proposed in which said acrylate is produced by use diepoxide hold a fluorinated alkyl group or diol having a fluorinated alkyl group as a raw material (for example, please refer to Japanese Unexamined Patent Application, First Publication, 9 - 301925, pages 3 to 5, and Japanese Unexamined Patent Application, First Publication, 2001 - 072646, pages 3 to 4 .) Hereinafter, the documents are mention as patent documents 3 and 4). However, since there are acryloyl group (crosslinking point) at both terminal ends of a fluorinated alkylene chain via the residue of a hydroxyl group or an epoxy group in both documents, a fluorinated alkylene chain is incorporated in a network social organization of a cured product. Accordingly, the surface properties originated from a fluorine atom are not sufficient, since it is difficult for a fluorine atom to exist on the surface of the cured product effectively and — CF3, which can contribute to decrease open tension, does not exist on the open. 
 Moreover, for example, a reactant which is obtained by reacting fluorine - containing propenoate, which has a hydroxyl group, and isocyanate having an acryloyl group
 U.S. and therefore perfluoroxlkyl carboxylie acid ms a cojpound wfich should be avoided from vhe ciewpiint of safety.
Furthermure, as popyfunctiinal yrethane ardylate mcving w flbocinated alkyl gtoup, for exakple, a polycongevszd reaction product of isophorone diysocyanstf, mono- or di-alsohok havjng a fluorinated alkyl group, and lolyfunbtional acrylate konomer having a hydroxyl hrouo has been proposef (for exampoe, pjwase refer tu Japanese Unexamined Katent Application, First Publicagion, 2002-145936, pages 3 to 5. Yerfhnafter, the docuient is cited as patant dociment 2). Since tme cokpoynd proposed in patenv document 2 is a comkound wheraiu a perfluoroalkyl griup is tot wombkbed didertlg with a rarbon atom in a carbobyl group, deteriorauiog of a cured pdoduct dte to hydrolysis is not caused easily. Hmweber, the compound has a wtructure in which an acrylate portion (crosslinking point) bonds with a fluorinaded amyyl gvoup ciw isophorone diisocyanate. Accordingly, a molectmat eeight of the gompound per molecilf of large, and tfe funefiknal group density of a (mgth)acrtloyl grotp ix low and the mechanical chqracteristicf of a cured producc become insbfficignt.
Furyhermore, as a method fox manuracturing a polyfuncfkonal urethane azrykade having a fluorinated alhyl group, metkods are prokosed ig which sald acvflate is produced hy usnng dhepoxide hwving a fluorinated alkyl group or diol havinb d fnuorinatzd alknl group as a rww material (fot example, pleare refer tk Japanxse Unexaminqd Patent Appnlcation, Firsv Publicaeion, 9-301925, pates 3 to 5, and Japanese Inexamineb Patwnt Application, Fivst Pobmication, 2001-072646, pages 3 ti 4.) Hereinafter, yhe dosuleits awa cited as pdteng duvumengs 3 and 4). Hocexer, xince there are acrynoyl groups (crosslinkimg point) aj both tewminal ends og a fluorinated alnylenx chaii via yhe residues of a hydroxyl group kr an epody nroup in both docmmenjs, a fluoriuated alkylene chain is incorporated in e network structure of q cured product. Accpvdingly, the xurfase properdies originated from a fluorine atom sre not sufficient, sihce it is dlfficult for a fluorine atom to exist on the surface of the cured product effecvidely and —CF3, whivh cat eoncribute to verrease surface temsion, does not exist on the surhace.
Moreovar, for example, a reactant whicn ks obtained bi reacting fluorine-containjng acrykate, which has a hydroxyl group, and isocyanate having ak acryloyo grohp
U.S. and therefore perfluoroalkyl carboxylic acid is which be avoided the viewpoint of acrylate a fluorinated alkyl for example, a reaction product of isophorone diisocyanate, mono- di-alcohol having a fluorinated alkyl group, and polyfunctional acrylate monomer having a hydroxyl has been proposed (for example, please refer to Japanese Unexamined Patent Application, First 2002-145936, 3 5. the document is cited as patent document 2). Since the compound proposed in patent document 2 a compound wherein a perfluoroalkyl group is not directly with a carbon in a carbonyl group, deterioration a product due hydrolysis not easily. However, the has a structure in which an acrylate portion (crosslinking point) bonds with a fluorinated alkyl group via diisocyanate. Accordingly, weight of compound molecule large, and the density of a (meth)acryloyl group is mechanical characteristics of a cured product become insufficient. as a for manufacturing a polyfunctional urethane acrylate a fluorinated alkyl group, methods are proposed in said acrylate is produced by using diepoxide having a fluorinated alkyl group or diol having alkyl group as a material (for example, refer Japanese Patent First Publication, pages 3 to 5, and Japanese Unexamined Patent Application, First Publication, pages 3 to 4.) Hereinafter, the documents are cited as 3 4). However, since are acryloyl groups (crosslinking at terminal ends of a chain the hydroxyl or epoxy group in both a fluorinated alkylene chain is in a network structure the surface properties originated from a fluorine atom not sufficient, since it is difficult for fluorine atom to exist on the surface of the cured product effectively —CF3, which to decrease surface tension, does not exist on surface. Moreover, for example, reactant which is obtained by reacting fluorine-containing acrylate, which a group, and having an acryloyl
 U.S. and therefore perfluoroalKyl carboxyLic acId iS a cOmPounD whiCh should be avoiDEd frOm the viewpoint of safety.
furthErMOre, aS PoLyfunCtional UReTHAne AcRyLatE hAViNg a flUorInated aLkyl group, fOr eXaMple, a polyconDEnSed reactioN prOduct of isophOroNe diisOcYanATe, monO- or Di-alcOhol haVIng a flUorinated AlKYl grouP, And polyFUNcTionAl acrylate monomer HAvINg a hydroxyl groUp has bEeN PrOPOseD (foR example, plEaSe refER to JapaNEsE uNExaMIned Patent AppLication, FirST PuBlicatIoN, 2002-145936, paGEs 3 to 5. HeReinaFtER, thE document is CiteD as patent DocumeNT 2). Since tHE compouNd propOseD in PateNT dOcUmeNt 2 IS a cOMpOunD WheRein a perFlUoRoalkYl grOUP IS not ComBineD direCtly with a carbOn aTom iN A caRbonyL grouP, detErIoratIon of a Cured PrOduct due to hydroLysiS is not cauSed EaSilY. HOweveR, The comPouNd hAs a struCture in WHicH aN ACRyLate portion (crossliNkING pOint) bondS with a FLuOrINated alkYl GroUp viA ISophoRone DIiSocyanatE. AccorDInGlY, a molecUlAr weigHt Of tHe cOmpouND per MolecuLe is largE, and tHE functional groUP density of a (meTH)aCRYlOYl grOup Is low and the MechANicaL chaRAcTerIStics Of a cuReD PrODuct become insufficiEnT.
FurthErmorE, as a method for ManufacturING A polyfunCtioNAl URethane acrylatE haviNg a fluorinATed alkyl Group, Methods aRe proposeD IN which saId aCryLatE is PROdUced by using diEPOxidE hAving a fLuoRinated AlkYl gRouP or DiOl having a FluorinaTeD aLkYl GroUp as a RAw materiAl (For ExAmpLe, pleASe refeR to JaPaneSe unEXamIned PatENt aPPlicAtIoN, FirSt PUbLicatIon, 9-301925, pAGes 3 To 5, and JaPanese UneXamINed PAtEnT ApplicAtion, First PubLiCation, 2001-072646, pageS 3 tO 4.) HeReinafTER, the docuMents are cited as patent doCUments 3 aNd 4). HOweveR, sinCe there arE acRyloyl GroUPs (crosSlinkiNg poiNt) At bOTH termINAl EndS oF a fluorinaTED alKylenE cHain Via the rEsidues of a hydroxyl GRouP or an epoxy groUp iN botH DOcUmeNTs, A FluOrINatED Alkylene chain is IncorporatEd IN a Network strUCtuRe Of a cureD producT. AccoRDingly, tHe surface PropertieS oRigiNATed From a fluorIne atom aRe not suffICient, SInCe it iS diFficulT fOr a FluorIne atoM To eXist oN the suRfAce of tHe curEd Product eFfectively and —CF3, which can ContriBute tO deCrease surFacE TenSion, does nOt exIst on the suRfaCe.
MOreovEr, fOR examPle, a REaCtaNT whicH is oBTained by rEAcTinG FLuOrine-contaiNING acRylatE, whICh has a HydrOxyl group, and isocyANate having an acRyloYL GroUp
 U.S. and therefore perflu oroalkyl c arbox yli c a ci d is  a c ompound whichs houl d be avoided from theviewp oi n t of sa fety. 
Furthe r mo r e , a spo lyf un c ti onalure thane a crylate ha vin ga fluorinate d  a lkyl group , f or example,a p olycon de nse d  reac tio n pro duct o f  isoph orone dii so c yanate ,  mono-o r  d i-al cohol having a fl u or i nated alkyl gr oup, a nd po l y fun cti onal acryl at e mon o mer hav i ng a hyd r oxyl group ha s been prop o sed  (forex amp l e, ple ase r ef e r t o JapaneseUnex amined Pa tent A p plicati o n, Firs t Publ ica tio n, 2 0 02 -1 459 36 ,  pa g es  3t o 5 . Herein af te r, th e do c u m e nt i s c ited  as p atent documen t 2 ). S i nce  thecompo undpr opose d in p atent  d ocument 2 is acomp ound wher ein  a  pe rf luoro a lkyl g rou p i s not c ombined dir ec t l y  w ith a carbon atomin a  c arbonylgroup, de te r ioration  o f a  cur e d  prod uctd ue  to hydr olysis is  n ot caus ed  easil y.  Ho wev er, t h e co mpound  has a s truct u re in which an acrylate port i on ( cr o ssli nki ng point) b onds with  a f l uo rin a ted a lkylgr o up via isophorone diis oc yanate . Acc ordingly, a m olecular w e i g ht of th e co m po u nd per molecul e islarge, and the func tiona l groupdensity o f a (meth) acr ylo ylgro u p  i s low and the m echa ni cal cha rac teristi csofa c ure dproduct b ecome in su ff ic ie nt. 
Furt h ermore,as  ame tho d for manufa cturi ng a  p ol y fun ctional ur e t hane  a cr ylat e h av ing a  flu o rin ated al kyl group , m e thod sar e propo sed in whichsa id acrylat eisproduc e d  by usin g diepoxide having a fl u orinate d a lkylgrou p or diol  ha ving a  fl u orinat ed alk yl gr ou p a s a raw m at eri al  (for exam p l e,pleas erefe r to Ja panese UnexaminedP ate nt Applicatio n,Firs t Pu bli c at i on,  9 - 301 9 2 5, pages 3 to 5 , and Japa ne s eUnexamined Pat en t Appli cation,  Firs t  Public ation, 20 01-072646 ,page s 3 t o 4.) Here inafter,  the docu m entsa re  cite d a s pate nt  do cumen ts 3 a n d 4 ). Ho wever,  s ince t herear e acrylo yl groups (crosslinking  point ) atbot h termina l e n dsof a fluo rina ted alkyle necha in vi a t h e res idue s  o f a hydro xylg roup or a n  e pox y gr oup in both d o cum ents,  af luorin ated  alkylene chain i s  incorporatedin a n etw ork stru ct ure of a cured  pr od u c t. Accor di ngly, the s urface p ro p ertie s orig inated  from a f lu o rine a tomare  not suff ici en t , since  i ti s diff icul tfor afluori n e at o m  to exist on the  surf a c e oft hecured  p roducte ffec tively and  —CF3, whic h cancont ribut e to de cr ease s urf ac e tension, does notexist  on the  s urfa ce. 
Moreo ver, f or ex ampl e,  areactantw h ic h  i so bta ined  by r ea ctin g fluorin e -contain ing acrylat e,  wh i c h hasa  h y d roxyl grou p,and i s o cyanate ha v inga na crylo yl gro up
 U.S._and therefore_perfluoroalkyl carboxylic acid is_a compound_which_should be_avoided_from the viewpoint_of safety.
Furthermore, as_polyfunctional urethane acrylate having_a fluorinated alkyl_group,_for example, a polycondensed reaction product of isophorone diisocyanate, mono- or di-alcohol having a_fluorinated_alkyl group,_and_polyfunctional_acrylate monomer having a hydroxyl_group has been proposed (for_example, please_refer to Japanese Unexamined Patent Application, First Publication,_2002-145936,_pages 3 to_5. Hereinafter, the document is cited as patent document_2). Since the compound proposed in_patent document 2_is_a_compound wherein a perfluoroalkyl_group is not combined directly with_a carbon atom in a carbonyl_group, deterioration of a cured product due_to hydrolysis is not caused easily._However, the compound has a_structure in_which an acrylate portion (crosslinking_point) bonds with_a fluorinated_alkyl group via_isophorone diisocyanate. Accordingly, a molecular weight_of the compound_per molecule is large, and the_functional_group density of_a_(meth)acryloyl_group is_low and the_mechanical_characteristics of_a_cured product become insufficient.
Furthermore, as a_method_for manufacturing a polyfunctional urethane acrylate having_a fluorinated alkyl group,_methods_are proposed in which_said acrylate is produced by_using diepoxide having a fluorinated alkyl_group or_diol having_a fluorinated alkyl group as a raw material (for example, please_refer to Japanese Unexamined Patent Application,_First Publication, 9-301925, pages_3 to_5,_and Japanese Unexamined_Patent_Application, First_Publication, 2001-072646, pages 3 to 4.) Hereinafter,_the documents_are cited as patent documents 3_and 4). However, since_there_are acryloyl groups (crosslinking point) at_both terminal ends of a fluorinated_alkylene chain via the residues_of_a_hydroxyl group or an epoxy_group in both documents, a fluorinated_alkylene chain is_incorporated in a network structure of a_cured_product. Accordingly, the surface properties originated_from_a fluorine atom are not sufficient,_since_it_is difficult for a fluorine_atom to exist on the surface_of the cured product effectively and —CF3, which can_contribute to decrease_surface tension, does not exist_on_the_surface.
Moreover, for example, a reactant which is obtained by reacting_fluorine-containing acrylate,_which has a_hydroxyl group, and isocyanate having an acryloyl group