乙烯基树脂Vinylresin.docx

乙烯基树脂Vinylresin.docx

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乙烯基树脂Vinylresin

乙烯基树脂（Vinylresin）

乙烯基树脂（Vinylresin）

ThecharacteristicsofVinylEsterResinsareinternationallyrecognizedandhighlyresistanttocorrosion.

A,standardbisphenolAepoxyvinylresinismadefrommethylacrylicacidwithbisphenolAepoxyresinwassynthesizedbyvinylresin,styreneissolubleinsolution,thetypeofresinhasthefollowingfeatures:

1.Thedoublebondatbothendsofthemolecularchainisextremelylively,sothatthevinylresincansolidifyrapidly,whichcanbeusedinarapidway,andthehighlycorrosivepolymerisobtained.

2.Synthesisofmethylacrylicacid,methylattheedgeofesterbondcanprotectandimprovethehydrolysisresistance;

3,theresincontainsesterbonds,whichare35to50%lesspermolethanchemicalpolyester（UPR）.

4.Themoresecondaryhydroxylgroupscanimprovethewettingandadhesionoftheglassfiberandimprovethemechanicalstrengthofthelaminatedproducts.

5.Becauseitisonlycrosslinkedatbothendsofthemolecule,themolecularchaincanelongateundertheactionofstresstoabsorbexternalforcesorthermalshock,showingresistancetomicrocrackorcracking.

Flameretardantvinylresinisgenerallysynthesizedfrombrominatedepoxyresin.Duetothebromineinresin,theflame

retardantvinylresinisresistanttochemicalresistance.Vinylresinbasecoating

Thephenolicepoxyresinwasintroducedintotheframeworkofvinylesterresin.ThesyntheticvinylesterresinwasgenerallycalledNovolacvinylesterresin.Resinhashighthermalstability.Whentheresinsolidifies,thecrosslinkingdensityislarge.Itsthermaldeformationtemperatureof120-135?

canprolongtheservicelifeandexcellentcorrosionresistance,especiallyforchlorinesolutionororganicsolventcorrosionresistanceisgood.Inordertoadapttotheneedsofhightemperatureresistantstrengthsituation,moremanufacturerstomodifiedphenolicepoxyvinylesterresin,improvethecrosslinkingdensityandheat-resistantpropertyoftheresin,ithasexcellentacid,solventresistance,corrosionresistanceandoxidationresistance,suitableforallkindsofhightemperatureandstrongcorrosionconditions,suchasdesulfurization（FGD）device,suchashightemperaturechimney.

Editingthissectionoftheflexiblevinylesterresininordertomeettheneedsofthevariousanti-corrosionengineeringconstruction,developedtheflexiblevinylesterresin,flexiblevinylesterresinhashighadhesiononthesurfaceofasteelandconcrete,comparedwiththetraditionalepoxyvinylesterresinanditselongationandhigherbondingstrengthgreatlyincreased,theimpactstrengthincreasednearlyfourtimes,interlaminarstrengthincreasedby20%,anduniquewearresistance.

（1）forcorrosionresistantlining,stitchingmaterialor

coatingresin,suchasoverallmortarfloorbottominthemaking,canbeomittedthedomesticoperationofglassfiberreinforcedplasticisolationlayerismade,atthesametimeofimprovingtheoverallperformance,alsocansavecost;

（2）adhesionofvariousmaterials;

IncombinationwithKevlarorotherreinforcedmaterialsforhighstrengthandwear-resistantproductssuchassportsormilitaryhelmets,sailboats,etc.

EditthisparagraphPUthistyperesinismodifiedepoxyvinylesterresinbycarbamate（TDI）ofepoxyvinylesterresinwasmodified,bothwithinthechainisnotsaturatedandunsaturatedchainside.ComparedwiththeusualbisphenolAepoxyvinylesterresin,ithasexcellentcorrosionresistance,flexibilityandgoodprocess.Duetotheintroductionofcarbamate,

Itimprovesthecompatibilityofresinandfiber,andcanmaintainthegoodairdryingontheresinsurface.Itcanbesuitableforwindingandotherprocesses.

Editthissectionoftheotherapplicationofthedomesticmarketofvinylesterresininadditiontotheabovevarieties,therearetwobroadcategories:

onekindismorevendorsusingacrylictypevinylesterresin,oronthebasisoftheresinmodifiedbyurethaneprocessing,thistypeofresinheatresistancelevellowerthanthecorrespondingmethylacrylicacidtypevinylester10-20?

theelongationoftheresin,

butduetolackofmethylesteronkeyprotection,ledtothe

decreaseofthecorrosionresistanceofresinsuchasalkaliresistance;Anothertypeofresinisthespecialproductsinourcountry,itisfumaricacidmodifiedbisphenolAepoxyvinylesterresin,butinAstrictsense,itdoesnotbelongtothevinylesterresin,butthevinylesterresinandbisphenolAunsaturatedpolyesterresininAtransitionalspecies,thistypeofvinylesterresinhashighcrosslinkingdensity,thecharacteristicsofbrittlenessandshrinkthebig,becausetheesterbondcontentinresinishigherthanstandardvinylresin40-50%,sotherelativelypooralkaliresistance.Vinylesterresin[1]

Thedevelopmentofalow-shrinkagevinylresinwasdevelopedbythenewtechniqueofeditingthevinylesterresin

Vinylesterresinasthecategoryofunsaturatedpolyesterresin,highactivity,curingreactionratefaster,causeofvinylesterresincuringaftercuringshrinkagerate,generalunsaturatedpolyesterresin（includingconventionalvinylresin）curingshrinkageisbigger,canachievebodycontractionofaround7-10%,withtheimprovementoftechnicalrequirementsforhighperformanceresinathomeandabroad,hopetofindsomelowcuringshrinkageofvinylesterresin,thisisoneofthemanymanufacturersathomeandabroadtoseektechnologybreakthrough.Themechanismofthelowshrinkageresinismorecomplicated,andsomemanufacturersinordertoovercometheresincuringshrinkage,lowshrinkageadditive（LPA）byaddingmethodstoachieveagoal,buthasitslimitationsintheapplication,andmanufacturersaremakingmoreeffortstotheresinsynthesismethodandmoleculardesignleveluptosolvethetechnicalproblems,

Lowshrinkageofepoxyvinylesterresinwithitshasenoughmechanicalstrengthandstiffness,enoughsizestability,heatcycle,bettercorrosionresistanceoftheuniqueperformancemeettherequirementsofhigh-qualityFRPproducts.

2resistantvinylesterresin:

Vinylesterapplicationatpresentmostoccasionsiscorrosionoccasion,butbecausehasmoresecondaryhydroxylvinylresin,canimprovethewettabilityoftheglassfiberandcakingproperty,improvethemechanicalstrengthoflaminatedproducts;Inaddition,itiscross-linkedatbothendsofthemolecule,sothemolecularchaincanbeelongatedunderthestress,toabsorbexternalforcesorthermalshock,andshowresistancetomicrocrackorcracking.Therefore,vinylresininsomeappliedinrequirementsGaoLixueperformance,impactresistance,butregularvinylresininendurancestudyimpactorneedstobeimproved,especiallywithfumaricacidmodifiedsomeofthevinylresin,becausethistypeofresincuringhighcrosslinkingdensity,junctionbetweenthemolecularchainsegmentsisshorter,sothepoorimpactresistanceperformance.Inthesyntheticdesignoftheseresins,itisrequiredthattherearemoreetherbondsonthemainchainofresinmolecules,sothattheresistanceoftheresincanbeimprovedsufficiently.Nowthereisanotherway,

Inrubbermodified,byusingendcarboxylnitrilerubber（CTBN）andnitrilerubber（BNR）tougheningmethylacrylicepoxyvinylesterresin,justafterthekindofmethodsathomeandabroad,alotofwork,theelongationofnaturalrubbermodifiedvinyl

resinsuchasbeenimprovedgreatly,andcanreach12%.

Generallytheimpactstrengthofvinylresin（nogap）isnotgreaterthan14.00KJ/M2,andnowsomeofthenewdevelopmentofimpactresistanceofrubbermodifiedvinylresincanreachmorethan22KJ/M2,rubbermodifiedvinylresincanbeupto25KJ/M2,sotheimpactresistantvinylresincantheverygoodapplicationinsomehighimpactresistanceofFRPproduction,suchassportsleigh,sporthelmet,etc.

3thickenedwithvinylesterresin

Asakindofhigh-performanceunsaturatedresin,vinylresinthickeningpropertiesofmanufacturershasalwaysbeentheresearchdirection,thisisbecausetheuniqueapplicationcharacteristicsofBMC/SMCrecognisedbythemajorityofcustomers,especiallywiththeBMC/SMCapplicationinautomobileparts,thickeningtypevinylresinistheimpactofthegeneralhigherunsaturatedresin,andgoodcreepresistanceandfatigueresistance.Thesepartsincludewheels,seats,heatsinks,gateplates,enginevalves,etc.Ofcourse,thethickenedvinylresincanbewidelyusedintheproductionofelectricinsulation,industrialpumpvalveandgolffirstclass.

Asakindofthickenedvinylresin,naturerequiresthefollowingcharacteristics:

thegoodinfiltrationofmaterialsandfillers;Initiallowviscosityandfastthickeningproperties;Goodmechanicalpropertiesincludingtoughnessandfatigueresistance;Longstoragecycle;Lowercuringexothermicpeakandlow-ethylenevolatilization.Touse

effect,inthesynthesisofvinylresin,themorecommonmethodis:

theoriginalintroductionofacidicfunctionalgroupsonvinylestermolecule（carboxylicacids）andreusingthecarboxylandalkalineearthmetaloxides,suchasmagnesiumoxide,calciumoxide,etc.）,butthismethodlongthickeningtime,generallyneedafewdays,theconditionissensitivetomoisturecontent.Nowalsodevelopedanothermethod,whichUSESisocyanateandpolyolreactiontoproducemeshstructure,soastoachieverapidthickeningoftheresin,thismethodissuitableforlowpressuremolding,stableviscositycontrol,lowrequirementsfortemperatureandhumidity,storedforalongperiod,atthesametimeproductscombinedwiththecharacteristicsofhighstrengthbetweenthelayers,atthesametimealsocanuselowacidvalueresinwithexc