CA2090576A1 - Composition for vibration damping material, vibration damping moldings and method - Google Patents

Abstract

650.00261 COMPOSITION FOR VIBRATION DAMPING MATERIAL, VIBRATION DAMPING MOLDINGS AND METHOD

ABSTRACT OF THE DISCLOSURE
A composition suitable for use in making vibration damping material includes an alicyclic resin, an isocyanate reactive component and an isocyanate. The vibration damp-ing material can be molded into a desired, complex shape or can be used in a vibration damping member that includes a layer of the vibration damping material and at least one steel sheet. The vibration damping material can include a filler by applying the filler to a cavity surface prior to introducing the composition into the cavity. The isocy-anate index can be shifted from 100 to achieve improved hot fusing ability.

Description

6~ ~Z61 ., -1-~0~0~76 COMPOSlll~N POlR ~RAl~ON Dh~G MA~RIAL, VIBR~TIC)N D~ IG MOL~INGS ~D MET~OD

q~hi8 in~rentior. relat4~ generally l:o a composition to maXe vibration damping ma~erial for use in ~ribration damp-irlg moldinçl~, vibration daDlping ~em~ an~ to a m~hod of ma3cing the vibration ~a~npin~ material. Mor~ speci~ically, this i nvention relat2~ to a composi~ion for ma}cing polyuro~ane ~br~tion d~mping mat~rial who~e molecular chain~; can b~3 varied to ac~ieve ths desir~d vib~atism damp-iAg.

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Eguip~ent such as do~ae~tic appliances, (e.g., wa~hing machine~3, dryer~, re~rigerator~, air coridition2rs, ~ans and the liXe~), Yehicle l~odie~ , chas i8 ol~ equipm~nt , ~ e . g ., copier~3 and ~he liXe), vibr2a~ ue ~o ~o~lng part~ (~3.g.,, motors, farls~ ~o~ln5~ ca~ri~ge~ ~nd the like) or external forces (2.g., the road over which a v~icle is driv~n) exerted on the eguipm~rlt. ThQ vibration ~nay caua~ exc6~-~ e wear on the equ~p~ent, create und~3ira~1e noixe~; and shorten the life o~ auipnient.

2 0 A viscoela8t~c layer o~ ~ibra~ion damping 3~ srial hav~ng a high ~odulu~ o~ ela~ti~ity 1~ used l~o les~sn vi-bration and ~he as~oc:iate probleml3. lh~ vibration daDIping material c~n be ~olded lnto ~hap~ a~ ~y in~ ectio~ or pro-tru~ion mol~ling or a sheet can ~e bon~ed to a ~ 1 sheet to make a vibra'cion damping member~
The vib~ation da~pins~ ria~ hae long ~01~ ular c:hains that ar~s tarlgled with each o~e~. When a ~orce i8 appli~d to ~Q mol~ular chains 80 af3 ~o mo~Ja th~se chi~ins, ~nergy is con~ d unl~ re~3 caused ~y ~e force ~50.00261 di~ort~ the chain~. A Yibration damping e~ ec* i~ ob-tained by the chains co~umi~g th~s en~rgy. To incr~ase the damping capability, it i~ required to effectiv21y de-~ign the molecular chain~ ~aking into account the mol~cular weight~ molecular structure o~ a mono~r ~tarting material, the degree and type Or br~nching of the molecule, ~he cro~-llnking form of t~s molecular network~, the cro6s-linking denRity, the ~or~ ~ copol~merization, the morphol-ogy/mic~o~tructur~, te.g., cry~talline or ~mo~phous), and the l$ke.
Conventionally utllized ~ibration da~ping mat~rial~
having long cha~n moleculQ~, ~u~h a~ polyi~obutylene rub-ber, polyvinyl chloride, polynorbornen~ ru~r, ethyl~ne-propylene disn~ terpolymer tEPD~), 1,2-polybutadiane rub-b~r, natural rubbar ~NR), ~tyren~-bu~adien~ rub~er (~B~
and dicyclopsntadiene re~in, ar~ u~ually produc~d prior to ~eing incorporated into the ~ration damping ~ateri~1.
TherQfora, it i~ dif~icul~ to de~ign the molecular chain ~o i~crea~e vibration d~mping capability.
In ~08t ~onventional ~poxy ~nd polyur~hane vihration dampi~g ~a~erial~, a la~ge ~mou~t Or inorganic filler~ are add~d to inc~ea~s the dynamic modulu~ o~ ela~ticity ~o t~a~
the vibr~tion da~pi~g capability i~ inGr~a~ed. Th~ la~ge Pill~r a~ount ~akeQ i~ di~cult to car~y out l~quid r~ac-tion molding using a ~thcd ~uch ~ r~action inject~on moldi~g (RI~). So~e inorgan~c fille~fi can bQ us~d in r~in-~orced ~I~ tRR~) b~t it is ~ill dlf~cult to r~ct the component8 o~ the Yibration da~pi~g ~aterial~ a~ a le~l of ~bout 20 to about 200 weight peEcent inorganic ~illers, A160, ~lake-~haped filler oa~not pa58 ~hrough nozzl~ u~ed in R~M and R~IM ~aking moldin~ with tha~ ~iller~ almo8t impo~8i~

~50.

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2~0~76 ~ibration damping laaterial can be manu~actured by ~sneading raw materials, e.y., a~phalt ~a rubber-}ike vi~co-ela~tic ~ub~;tance) " poly~nerized plastics, the aforemen-tloned rubb~rs and the likR with the ~iller using a Banbury mixQr and then calend2ring the kn~ad~d product into the form of a she~t or molding it into ~;h~pe~ The raw materi-al~ ar~ alr6~ady ~olid at roc~ 'c~peratur~. The raw materi-al being solid at room temperature and the U3~! of the larg~
amouIIt o~ ~iller r~sult in injec:tion and protrusion molding procese limitation3. Al~o, a lo~ o~ energy in the ~oxDI of heat and pr~sure is reauired Por ~olding.
A~phalt i~ na~urally occurring and it is dif~icult to ~reely d~ n tllo ~nolecula~ c~ain.
~n epoxy reYin vibra'cion ~ ping ma~erial ig ~anufac~
ture~ by mixing and reacting a liquid oligomer having an epoxy ~r~3up and a liqu~d polyaDIline to Iorm a ~olid.. A
freely ~haped molding can he obtainad by pouring th2 liquid mixtur~a into a mold. I~ a ~ 3r il~ an a~ount effecti~e 'co impro~re ~he damping capabili~y i~; mixed with t,h~ liquid~, the viscosity incrsa e pr~YentE~ adequate mixing. I~ mi~ng i~ inade~uate the da~pins7 ~:apab~ y i8 x~duced. The epoxy re~in type molding typically haQ a lower c:apability o~
da~i~g vibra~ion than a moldinç~ ma~ ~rt~m t~l3 abo~-de-scri~e~l asphalt-~a8ed da~ping ~nat~rial ~u~ ~o t~e inability to us~ an e~ee~ive a~ount o~ r. ~l~o, ~e ring-op~n-ing reaction o~ ~n ~poxy grollp wit~ the a~ins is a ~low or incc~nplet~ reaction t:hat i~ likely ~o occur than a polyaddition reactiorl o~ a polyure~a~0 Designin~ ~che molecular chain producE3d :Ero~ the QpOXy r623in i6 not a~
3 0 ea13y a~ ~e i~n~n~ ~h~ ohain produc~ by ~he polyaddition r~action b~atween thQ i60cyanat~3 and t~e ~olyol and/or aDline.

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Some con~7en~ional vibratioII damp~ng materials are health risks. Asphalt may cau~;e a ::~e or keratoderma upon repea~ed expo~ure and can cause carcinQm~ of t~e skin and lung~. Th~ ep~xy is carcinoganic and ~nay cau~e aller~enic dermatiti6, allergy o~ thQ r~spiratory organ~, corneal conjunct~vitis and bronchial a6thma. The ~mines, espucial-ly zlromati~: aminQs, are highly ca:rcinogenic.
~any o~ e conYen~ional ma'c~rial~ are o~tained }~y addition polymerization of vinyl-ba~ed monomer6 but the ~olecular c:hain cannot be ~r~aely adiu~t~d. Alfio, the~e monomers exhibit oompatibil~ty and reaction di~ficulties thu~ iting the blending bel:~r~ onomer~ and thcir poly-merizatlon .
~onventional polyurethane vibration damping ~at~rial~
u;e polypropyl~n~ glycol, polye1:hylene glyool and polye~ter ag thQ polyol reactant that i~ reacted with the i o::yanate.
The~ polyurethanes arQ u~ually s0~t. It i~ pre~sntly 'cheori~ed ~hat thsse polyol r~actarlts con~ribute to th~
poor ~ fectivene~ of ~he polyure~ane ~lbra'clon damping 2 o ~naterial bz~aus~ their molacular chain has a low rotation barrier energy and relatively small ~id~ chains. ~hera-~ore, conversion o~ deforDIation stres~ to kh~al en~rgy iq les~ lik~ly to occux. ~tt:emptEs ha~e been made ~o incre~a~3 ~he hardne~3~ o~ ~:he polyur~than~ by ~rlOEea~ing the hydroxyl ~OH) value o~ ~h~ pol~ol reaota~s to d~ y ~he molecular network. This increa~e i~ l~a~dne~; r~sul~s in ~h~ micro-BroYn ~otion b~t~aen mol6~c:ule ~3egments being le~ liX~ly to occur and th~ dyna~ic modulu~ o~ ela~ticity (E' ) bei~g ir~cr~ d but ~ being seducad which r~3ult~2 in no im-3 0 proYsment in ~rib~ati~rl da~ping capability ~. That i5, the collv~r~tlonal so~t polyurethane has a dy~amig: modulu~ o~
ela6ticity ~:hat i3 too lo~ am~ ~e conven~ional hard poly-urethane haE~ a tan ô that i~ too low. q~U8, the corl~eTI-V' C~U.W~l -~- 20~76 tional ~olyure~}~ane~ are~ not 6uitable, especially for ths non r~3tric~ion typ~ ~ib~ation damping ~e~er.
Th~ methad of lnitially rea~ting the polyol reactant and isos:yanate at an isocyanate index of about 100 or in tll~ range of a~out 80 to 120 i~ called a one-shot proce~s.
e i~oc:yanat~ index i8 not at about 00 the polyure-thane will contain unreaGte~d polyol reactan~ or isscyanate in an amou~t that can adver~ely af~Eect the physical proper-ty o~ the polyurethane or re~ult ln a polyur~thane that is ~;ticky. Polyur~han~ ha~e been intended to be used a~
elaRtic: mat~rial~ such as ela~tomers and ~oam~.
~rhe m~thod o~ f irst reacting a~ polyol r~actant and isocyarlat~ at an isocyanate indsx shi~ted aw~y from loO ~s calle~ a prepo~ymer proc~ bec:zlus~ a prepolymer is pro-duced. Tha prepolymer i~ su~segue~ly reacted ~ith e~ther a polyol r~a ::tarl~ or i~ocyanat~ at an i~ocyanate ind~x o~
about 100 or in the ran~e of ~bout S0 to 120 to produce polyurethane.
I~ the i~ocyan te ind~x i ~hi~ted from loO, the hard-n~ss of th~ polyllr~ an~ and it~ vibr~ion damping capaci~y are reduced. Th~ hardn~86 can ba ~aint ined }:~y mixing a~
inorganic f iller wi~ the polyol r~actant and icocyanate .
Thu~, ~mprov~d vibration da~ping capabil~ty iQ achi2ved withs~u~ sett~ng t~ ~so&:yana~ inds~c to 100 to as:~ieYe the 2s ~proYe3~ent. Ho~r~er, th~ above-di~s~ s~d p~oble~s associ-at~cd wi~ th~ ~iller ~ri6e.
Vibration dampin~ ar~ divid~d into reæ~riction typ~ and non-r~rictlon tylæQ ~sa~ers. l~e r~#tr~ction ber is arranged 6Uch ~hat t~e vi3coel~t~a shRet o~
vibr~ion damping ~na~erial i~ int~ ed b~wo~n ~wo layars o~ vibr~tion dampinçt s~l . hee~s. T~e non-r~s~tric~ion type m~ber ha~ ~,ribra~ion da~ping ~at~rial bond~d to on~
side o~ a vibrat~on da~p~ng ~;t~sl ~heeltO ~i~ both type~, 6Sû,Oa~61 2~9057~

a shaet of ~ibration da~ping ma~erial contacts a ~u~facl3 oî
the equl~ment.
T~e r~triction tyE36! ~e~sr is ~up~3rior to the non-re~triction type member in it~ capa~ility of damping vibra-tion. ~he non-restrictiorl typ~ meDIber has be~tsr ~orma~
ity than the res~riction type mem~er. A typical restric-t~ on typ~ m~mber is di~ficult to weld and ha~ limi~ations in formal~ility becau~e the relatively ~oft viscoelastic damping material be~woen the two ~3heets mak88 ~;moot:h pre~; -~0 in~ che member dif~icult as comparsd to usual ~teel ~heet~. The re~riction t:ype member gen~rally can achieve a co~ ed lo~ ~ac~or not ~llQr thAn 0.5 ~aan intsrpos2d between t~o 0.8 ~illim~ter (m~) th~k ~ts~l ~hse~ o that it ha~ good ~ibration da~ping ::apab~ lity.
The non-r~tric'cion type member can be producQd ~y bondi~g the vib~ation ~aDIping ma~erial to a pre~orlaed and a~embled urface ~hic~ ins::rea~eEs its~ u es. ~oweYer, th~
vibratio~ damping capabilitie~ ar~a not ;a~3 good a3 compared to a r2striction ~ype ~Dber and g~n~arally a combined loss ~ac~or leE~s thzm 0. S whel~ bonded to a 0. 8 DU!I thicX ~teel Qbe~t i~ achiev~
It is pres~ntly th~o~i~sd ~at ~he reason 6ati~actory ~ribration da~nping capabili~is~s hav~ not bl3~3n pr~viou~ly obtai~d with the non~re~triction type me~nber i5 becau 2~ t~e damping ma~arials ha~re pr~marily been ba~ed on bl~nding at lea~;t one poly~er and a ~olid inorganic ~ r.
~ribration damping itl autonobil~ c~n be ~aieved by placi~g sh~et-~or~ ibrakis:~n da~piny ma~erial on an irx~
lax ~loc~r o~ the ~utc~mobile ~otay. T~ vibratios~ damping 3G ~at~r~al i3 fu~d to and D~ad~ ~o confona ~o th~ ~hap~ of ~e ~loor in a paint drying *urnac~ at 2~ te~p~ratur~ of about lQû~ 'co 150 C. Thi8 fuslng and confo~iny pro;:ess i~ call~d hot ~u3ing~, The Yibration da21ping Dla~læial us~d ~7~ 209~76 in hot fu~ing i~ u~ually an asphalt or epo~y vlbratlon da~ping material which ha~ in~er~o~ Yibration d~mpi~g capa-bility a8 compared to th~ con~ntional re~triction type ~ibra~ion damplng memb~r. The t~peratur~ at which the a~phalt or epoxy vibration ~amping materia~s hot fuse can-not be ~reely changed.
The ~ndustry desireR a compo~ition ~or a polyurethan~
~bration damping material, molding~ made fro~ the compo-sition t~at have lmb~dded the~ein a ~iller, Yibra~io~ d~mp-ing member~ that includQ ~h~ co~position and polyurethane ~ibration dam~ing ma~erial that ~an be u~d in a hot ~u~ing process ~hat o~ercome at l~t one o~ th~ a~or~mentioned ~hortcomings.

The present invention compreh~nd~ a composition ~uit-able for u~ in making ~ polyuretha~e ~ibra~ion damping mat~rial, a ~eth~d oP ~aki~g ~ill~r-containing ~old~gs using the co~po~ition, vibration d~mp~ng me~b~rs made usin~
the composition and a polyurethan~ Yibration damping mate-rial that can be us2d in ~ hot fu~in~ pro~ess. Th~ compo-sition includes an alicyclic r~in, an i~ocyanate r~active co~ponen~ and an isocyanat~
The compo~i~ion d~es not po8e th~ health ri~ks a860~i-ated ~ith con~entio~al vibra~ion d~ping material~. T~
polyur~than~ i~ hardened not by lnc~a~ing th~ den~i~y o~
the ~ole ular chain as i~ taug~t by ~he ~rior ~rt, but by u~ilizing t~0 rigidity o~ ~olecular ~ain chain~ o~ th~
alicyclic re~i~ and ~socyanate r~ac~l~e co~ponent, pre~era-bly t~ alicyclic re~in. Th~r~ore, the vib~atio~ energy i~ ~ore liXely ~o convert to gher~al eaergy t~rough khe m~cro-Brown ~otion bet~een ~g~e~t~ o~ ~he mol~cular chain ~o lnc~eas~ vi~ra~ion damping ca~ability~

~5~.0o~61 2~90576 T~a use Or a polyurethane permlts fr~er ~olecul~r chain des~n as compared to other polym~r~. The polyure-thane is obtain~d by a polyaddition r~action between the alicyclic re~in, ~he i~ocyanate rGactiY~ comp~nent and t~e S i~ocyanate. These alicyclic resins, isocyanats reactiva co~ponent~ and i~ocyanatz~ are commexcially available in a wide range of molQcular ~tructures having varioua molecular weight~, branching ~orm5, d~reeB 0~ br~nchlng and the li~e to enable tail~ring of the ~olecular Ghain of the polyure-tha~ for the end use. The ~olecular ~eight and 3truc~ure including the numb~r of function~l grOUp8 0~ the al~cycliG
r~in and i~ocyanate reactive co~ponent can be easily ad-~u3ted due to ~heir ~as~ in r~action and pol~m~rization charact~ri~tics to tailor th~ ~olecular chain.
m~ me~hod produc~s a ~ibra~lon damping ~aterial in-cluding a ~iller wi~hout rs9uirlng tha~ the Co~position and fillor be mixe~ ~rior to ~ntroduction into ~he mold. ~o ac~ieve thi~, a mold cavity ha~ æill~r applied thereto prior ~o in~roduction of the composition. Pre~erably, the iller i~ adhered to ~he cavity sur~ace. Thus, ~h~ ~iller do~s no~ ~av~ to pas3 ~hrough a nozzl~ o~ a ~olding ~china and th~ afor~Qntioned pxoce~ing shortcoming~ of using a ~iller ar~ avoid~d. Al~hough ~ho m~thod o~ applying the ~iller to a mold c~vit~ ~ur~ac~ 1~ di~clo~od in Japan~e Pa~ent ~pplicatio~ No. 3-2747~, ~he ~pplication do~s no~
di~clos~ u~ing th~ pre~en~ composition.
By varying ~ allcyclic r~in, isocyanate reactive co~ponent and ~socyanate, polyureth~n~ vib~ation da~ping ~at~rial can be produc~d that ha~e ~ariou~ da~ping capa-blli~i~s. A polyurethane c~n be produced ~or damping vi-bration whieh ha# ~o~ a high ~i~ration da~ping capabili~y and a high hot ~u~ing abll~ty. Th~ co~bi~a~ion o~ htgh 650.0~
g -` 209V~7~

vibration dan~ping capability and high h~ot fu~ing a~ility i~
obtained ~y ~hi~ting t~ ocyalnat~ in~ex from 100.
. Th~ range of th~ isocyanzlte sh~ rrom 100 dependç2 upon the molecular ~3t~ucture and composit~ on o~ the S alicyclic re~3in, the iElocyanate r~ac~iv~ component and the isocyanate utilize~ and t2~ de~ired phy~ical propertiss o~
th6~ polyurethane. The ~hi~t rarlg~ i5 a re~ult o~ ~che ~ta-tictical molecular weight di3tribu~0n o~ ~che alicyclic resin, the i~ocyana~e r~ac~iv~ co~ponQnt an~ the isocya-nat~ . I r the molecula~ w~ight di~3tribution i n~rrow ~e ~hif~ ran~s wi~hin which elasticlty ~8 obta~ d l~ al~;o narrow.
Numsrou8 other advantag~ and ~atur~ o: the pre~nt irlvention will belcome readily apE~ar~nt ~r~m the ~ollo~ing d~tall~d description o~ th~a pre:eerr~ ~odi~n~ and t~e app~nde~ clai~.

~GU~E 1 is a cro~ e~tional vi~w o~ a D~old u8~d in EX~I,E l explained in the Deta~led D~scri3~tion her~in.
FIt~ 2 i8 a pe~pç~cti~e vie~ o~ ~ pol~a~tharl2 mold ing obtaLinasl by u~ins~ ~e mold o~ ~IGIJR~ l.
FIG~ 3 illu~tr~tQ~ a ~old ha~ring ~i}ler o~ a surf2lce for malcing ~he polyur~han~ ~olding 9~ 2 harein.
~IG~ u;trate a DIOld ~aYinS~ filll3r on a ~i;uri~ace for ~alcing tll~ polyur~thanQ ~c~ld~ng o~ ~XA~?L~ ~ h~r~
iF:tG13RE: 5 i a pro~3p~0ti~ ~ o:~ ~he polyur~hane ~old~ nq c:on~aining ~ille~ mold~ being obtained by tl~e m~a~hod o~ EXa~PLE 3 her~in.
FIGW E 6 is a gralph illu~:rat~g th~ r~lationE~hip 3 0 betwasn the 10~5 ~actor and ~p~r~ or variou~s poly-urethane ~olding~ ~ade according to th~ 33XaDlpl@18 ~er~ 1 an~l 65U.~

-1~
2090~7~
3~or othzr ~Inaterial~ mads in accordance ~ith the comparatiYe 13xa~ple~ h~3xein.
FIGURE 7 i~ a cros3-~ec~ional view o~ a mold used in EXAI~LE 5 her~in.
FIGURE 8 i~ a per~pact~ve ~iew of a polyurethans mold-ing for damping vibration obtai~ed by using the mold ~ho~
in FIGURE 7 h~rein.
FIGtJRE 9 is a per~p~ctive vi~w o~ a 3heet-~orm poly-ursthan~ molding for da~ping ~ib~ation ~o bæ applied onto lo ar~d shaped in con~ormilty w~t~ a l~te21 ~heet w~th irregular-itie~.
FIGtlRES 10, ~1 aIId ~2 ar~ graphs ~howiT3g th~ ~ela~ion~
~hip betw~ the co~nbinedl 1088 ~actor ~or a ~ibrat~ n da~p-ing 7ne~er and t~mperature of variou~ ~?olyurethane ~nolding.
~or da~ping v~ ~ra~ion according to E~a~ple~; o~ th~ present inYention and Co~ara~iYe Exampl~s a~ d~3sGribed herein.

Altllough thi~ inventio~ is sla8ceptible to e~bodim~
in many di~erent ~OrD15, ~ere arEI show~ in the dr~wings ;~nd will b2 de~3cribsd in d~tail, pr~0ntly preî~rred em-bodiments o the invention. It ~ould b~3 ~mdQ~to3d, l~o~
~3~er, t~at the p~essnt d~clo8ur2 i~3 ~o b~3 con~ider~d 21~ an ex~ampli~ication oS th~ principl~ o:t ~ic inYsntion and is not int~nded to llmit th~ inv~tion ~o. the ~odiment~;
illu~tra~
The pra~nt invention i~ diracted to a compositios~
6ui~a~1~ fo~ U8C~ in rnanu~aeturirlg a polyur~thane ~ribration damping ~.t:erialJ a Jnsthod of Du-k~ng polyur~thane ~oldirlg~
using the compoE~ition and a ~ ar, Vi~tiOtl da~npi~g m~m-be~8 th~t util~ze ~e co~po$itls)n zmd a E~olyurc~l:haIl~ ~ibra-~ion d~ping material 3u~t~bl2 $or use in a hot ~u3ing ~roceEs~.

65~ 261 2090~76 Th~ compo~aition inc~ude3 ~n alicyclic resi~, an isocyanat~ rea~:ti~e compor~ent and an i~30cyanate wher~in polyu~e~hane~; mad~ ~herefrom ar~2 ~olid~ a~ room te~nperature and ca~ ex~ibit ~ molt~n re~in characteri~tics that result ~ r~ impro~ed hot fusins~ 3 compo~ition also in-clude~ an e~ective amount o~ cataly~t. Prs~erably, a ~olid ~iller is used in the compositis~n.
The ter~ ocyanat~ reactiv~ component", as used hQrein in its ~variou8 gram~atical ~rm~1 id~3ntl~ies a chem-ical having at least ona group tl~at can reaçt with the NCO
group of the isocyanate.
The ~erm "6ami-mol~en rs~isin characteri~3tic", as3 u8ed in it~ varioui3 gra~atical rO~, mean~ that wh~n a ~ha~t o~ polyurethane is placQd on a horizontal ~teel she2t ha~-ing a 60 milli~et~r ~mm) diam0g~r hola at a temp~ratur~ of 150C. for a tlm2 perlod of 30 ~nu~e~, a drop not ~mall~r than 10 mm in length iB produccd but no drippin~ occur~.
The alicyclic re~in pr~irerably ha3 doubl~ bonds. The al~cyclic re~in can be o~ta~n~d ~rom a Dlunomer th~t is a ~raction of a petrole~ produ~:e containing 5 to 9 carbon ato~ and which ha8 a ri~g-sha~ad molecular structu~e and double bonds ~o~ poly~erizatio~. It i8 pre~ ly ~eorizad that ~he int:reas~ed rotation b~rr~er en~rgy due to t~
chairo~haped ring and (2) ~ide chains tha~ ext:~nd fro~ two carbon ato~ns to ~ o $orm a ring-8haped ~3ide chain resul~s in th2 al~cyclic ~e8in being l~s~ lik~ly ~o defor~ and ~ore likely to convert t~e d~o~atit~n Qnergy into lthermal ener-gy thu8 pro~Jid~ng a high vibrakiosl damping capab~lity. In contra~t, ot~er poly~ u~ as polye~hyl~ and poly-a~rylonitrile only ha~ a ~i~e chain e~ 3nding fro~ one carbon a~o~n. T~ ~,ribratioa da~ping capability ~ ~ u~ually maxi~lzed at ne~r th~a glaE~8 ~raJI~itton temperature o~ tll~
polyur~t~ane. Thi~ t~ratur~ can be ~ju~tet3 by changing ~o.a~

209~7~

the ratio of alicyclic re~3in to i~ocyanat~ r~ac~iYs compo-nent Prefera}~l~, the alit:yclic resin ~as a so~tening point at about 100C. so that it can be melted and mlxed into thç~
i~ocyana~3 reactive compon~nt. co~patibility Or 'ch~ alicy-clic re~ir. an~ the i60cyanate reacti~e component i~ en-}~ance~ by th~ pre~ence o~ a polar group, e.g., carbonyl group, OX- group, NP~`- group arld NH~ group on the alicyclic r~in molecule.
PrQfera~ly, ~ alicyclic resin i8 a t~le3chRric poly-mer haYing at 1 ea~t on~ ON~ or ~H- group which con-tribut~s to the further a~oidanE:e o~ ~e r~3ductlon in reac-~i~ity.
Rspre~sn~tiv~ alicyclic re~in~ includ~ dicyclop~nta diene resin, couma~on~a-inden~ re~ , rosin modi~ied r~sin, poly~ n~a r~sin, alicyclic water-added petrol~um resins an~ th~ like. The OH~ an~ groups are availabl6~
to react with the i~ocyarlato group but ar~ not requir~ad ~h~ an iscc:yanate, raac'cI ~Je compon2nt i; pr~s~ant.
2 o The isocy~nate reac:tiv6~ co~pon~n~ pr~f ~rably ha8 two ~unction~l group~ whic~ re~c~33 t~ m~lecular weight and lower~ th~ vi~c:o~ity o~ alicyclic rssin and isocyana~e reactiv~ compone3lt mixturQ to p~rmit t~ae u~e of an alicy-clic re3in ha~ing a higln vi ~c:o~i~y. T~ 1 . o ma~s the mol~cular chain~ more int~rt~ined which increa~e~ ~ibration da~pi~g c~pability.
Pre~e~bly, ~h~ isocyan~e reac~ive c:o~aon~nt ~8 a liquid in the 1:empQra~ure range of abou~: 20 to about 100 C.
Rep~es~ntat~e isocyana~ce r~ctlv~ ~omp$:ne21t~ in¢lua~3 polyol3 (e.g., polyoxyalkyl@ne ~lycol8 ha~.ring t~o to abouf:
s~x ~:arbon ato~ in t~e~ al~yl group, aL~yle~e glycol6 wherein ~he ~lky~ group s:ontai~ ~ou~ ~wo to about six ~.W~l -13- 20~57~

carbon atom~, diols con~aining two to about ~ix carbon a~om~ and th~ like), polyest~r6, primary and ~scsndary amine~. The polyoxy lkylen~ gly~ols are preP~rr~d.
R~pre~entati~e polye8ter8 includa polyethylena-adipate, polybutylene-adipate, polyethylene-butylen~-adipa~, polye~hylene-dle~hylene-adipa~ and the like.
Repr~entativQ amin~s includQ amlne-capped-polyether-polyols that ar~ com~ercially ava~lable and ars conventionally utllized ln polyursa RIH ~echnology Repre~enta'cive polyoxyalkylene glycols include~ poly-~t~yl~ne glycol, pQlypropylene glycol, copoly~ers thereo~
and th~ like. R~actiVit~ creasas~ i~ the polyoxyal-kylene glycol has the pr~erred primary OH- erd group.
Tlla use o~ a polyol havi~g a primar~ O}I- gro~p a~ the end~ Or th~ ~ol~cule, and an aromatic: isocyanate wit~ t~e alicycl~c resin reæult in a reacti~ ty ~hat i~ ~ar fa~t~r than oth~r ~ibration damping ~at~ri31~ ~he polyure~haae ~olding i~ ~olidl~i~d with~n ~veral m~nu~s at roo~ tem-perature ~nd at normal pre~ure.
Preerably, the i~oeyanat~ ha~ ~wo or ~ore funct~on~l ~.socyanate grOUp8 p~r mol~cule. ~ogt preferably, the i~o-cyanate ha~ a larg~ number o~ l~ocyanat3 groups to obtain a polyuret~a~e havin~ the dQ~i~ed ~olecular weight and ~olecular c~in lsngth b~cau6Q th~ i30cyanat~ r~actl~
componen~ has a rsduced ~olscular w~ightO ~or increa e~
rea~tivi~y, the isocyanate i$ p~ rably a~ aromatic i~o-~yanate. In U8~ ~here color cha~g~ ~u~t be a~oi~ed, th~
i~ocyanat~ is pre~rably an ~lipha~ic i~ocyan~t~
R~regentativ~ lsocyana~ include diphenyl m2thane d~i~ocyana~e, toluene dii~ocyanate, p-phenyl~e dii~o~ya~
nate, dlani~iain~ di~ocyan~t~ 5 nap~halene dii~ocya-na~, di~ethyl tr~ph2~yl ~ha~ t0t~ 0~yanate, triphenyl o~.W~l 2~9~7~

m~thane ~rii~ocyanat~, polyphenylen~ polym~thyl i-~ocyan~t~
and ~h~ lik~.
Pr~fe~red i~ocyanate~ ar~ polyphenylene diisocyanate, di~e~hyl triphenyl methane tetraisocyanate, triphenyl meth-ane trii~ocyana~e and the like.
The cataly~t i~ conventional and i3 u8e~ to promo~s ths addition reactionA
R~pres~ntative cataly6t~ are tert~ary amin~s, organic tin co~pound~ and thQ li~
~apre~en~atiYe te~ti~ry amines includ~ triethylene d~amines, tri~thyla~ine, ~a~ram~thyle~hyl~ne diamine, di-~ethyl~hanol a~Lne and the like.
Polyurethan~ ~olding~ ~r dampinq vibrations can ~e m~e by co~vQntional reaction in~tio~ and op3n pouring molding proce~ea~ usin~ the composition and an optional ~iller. Th~ molding~ can have a compl~x ~hap~ a me~h-od of molding the polyureth~ne i~ a ~old that defines a cavity having a ca~ity ~u~ac~5 t~e ~iller i~ not ~ixed wi~h ~he compo~i~ion prior to in~roduction in~o the ~old caYi~y. ~ather, kh~ fill~r i~ applied ~o th~ 3ur~ace prior to introduc~ion og th~ ¢o~ooi~ia~ Pr~rably, th~ ~iller is fix~d in placOE su~ that ~ova~ank ~ th~ Pi~ler i~ ~lni-mizad when the co~po~itio~ roduc~d in~u th~ Ga~ity.
By applying th~ ~iller ~o th~ sur~a6~ i~ is po~sible ~o in~rea~e the dyna~ic ~o~ulus o~ ~la~tlcity ~E') u~ing a laxge a~oun~ o~ ~iller ~uc~ a3 that achle~d in a conv~n-tional she~t mold~ng proce8s, but ~hich are unach~e~abl~ in a conYQntional po~ure~hane ~olding p~oc~s~. Fur~h~r~ore, the shortco~ings o~ the sheet mol~ing pro¢~ are a~oide~.
T~ giller can be adh~re~ to ~h~ ur~ac~ u~ing a ~
ha~lng an adh~i~e lay~r to whi~ th~ riller is appl~ed.
Alter~iY~ly, i~regular patt~rn~ ~hat are o~ th. ~a~

wv.w~
-1S^ 2090~76 order a~ the grain ~iZ8 0~ the ~iller can be made on the ~ur~ace.
Tbe filler can be applied to n cavity surface that has curve~ by providing in the sur~aCe hole~ therethroUgh that are in communication to a vacuum sol~ce. A ~heet having an adhesive layer can be held in place using thQ reduced pres-sure with the adhesive layer being exposed to receive ~ill-er. Repre~entat~ve material~ from which the sheet can be mads include thermopla6tics, e.g., polyethylene, and ther-lo mosets, e.g., polyamide~ and polyestsrs.
The ~ilm ha~ing an adhesive layer i6 the preferred m~thod of fixing the filler to the ~urface.
Representat~vc filler~ includ~ flake-like ~ub~ance~, e.g., mica, gla_Q flakoQ~, graphite, talc, clay an~ the 15 like, small granule$, e.g., glas8, gla~ ~iber~, carbon black, silica, alumlna, iron, lead, pulverized thermoset re~ins and the like and powdery substancos, e.g., calcium carbonate, carbon black, silica, glass po~der and t~8 like.
You will notc that the method pro~ides for tho use of ther-20 moQet resins that conventionally are not reusable.
Because the filler doe~ not pass throug~ molding ma-chine noz21~ that can be clogged, thore is no need for the filler to be a powder. In ~act, tho po~der filler_ are the least preferred ~iller~ becau~e ~t i_ di~icult for the 25 composition to penotrate between individual powdors on the eurface. For example, granulatod calc$um carbonate having a grain size of several milli~Qter~ i~ preferred over pow-dered calcium carbonate. Furthermoro, grain sizes of ~
ers that could not be u~ed ln the pa~t, e.g., mica having 30 gra$ns that are 6ev~ral millimoters in size, becau6~ they could not be usod in conventional molding machine~ are 6uita~1e for use herein.

UJV~W~V~
^16-2090~7~

Optio~lly, a ~iloxan~ compound can be utilized to i~prove the laixability o~ the isocy~a~e reactiYe co~ponent and the i~ocyanate.
A ~epres~ntativs ~iloxane is a commercially availabl~
dimethyl polysiloxan~ compound.
Non-re~triction and re~trictlon ~ibration damping members can be produce~ by con~rentionally adherillg a s3hee~
o~ the polyure~an6~ vibration ~ ing material to 1 or 2, re6p~cti~r¢1y, matal 8hes~t8.
lo The ability o~ the polyurethanQ vibration damping ~at~rial to b~ ho~ fta~ad ~:an be i~proved by shi~king ~he isocyanat~a index ~roDI 100 to gi~e it 6e~ Qolten re~in cha~act~r~ ic6. Th~ isoayarlate in~e~ to ol~tain s~ mol-t~n ch~ractsristlcs i~3 dependan~ or~ composition. In th~ ~ot ~u~ing proce~8, a ~1at 8}18~t of E~olyurethane vibra-tlon da~npi~ oateria1 i~ p1ac~d on a ~ ac~, ~uch as the, compartm~rlt floor of an ~uto~obilQ, that is~ irregu1ax. Ths da~7ing material i~ hot ~uo~d to th~2 au:rface at a temp~ra ture hiyhær than room tempera~ure, p~e~erably in a paint ~o dryin5~ furnAc~ ~ha~ i~ at a te~p~rature o~ about 100 ~o about 200C., and by gra~ity. ~ vibration damping Dlate rial mu~t becom~ ficier.tly f`le~ ~ithin ~is t~mp~ara-tur~ ran~a for g~aYity to effect Rhapl~g. ~ ration damping ~aate~ial becomol3 too ~1~axib1e it can cau~e ~luid~zation which rD~u1ts 1~ drippltlg o~ the ~ ng ~a~
ri~t through hole~ sr dri~tlny o~ da~ mat~rial ~ro~a proper pol3itioning, bo~ o~ whi~ ar~a und~irab~e.
Th~ term "i~ocyan~tc ~-nd~3x" ~ as u~e~ in ~t~ Yar~ ous gram~atical ~o~, iB de~ined ~y ~hs ~ollowing ~ORMUT~:

EQ~m~;
I oc:ya~at~ index = t (actual i o~:yan~e ~ormula weigh~toichio~0~ric i~oGyanat~ ~o~ula ~ig~ X 100.

VJV~

~ ~ 209~7 ~re~
stoichiom~tric i~ocy~nate formula weight - t~i~scya-nat~ equivalent)/~polyol eguival~n~)~ x (polyol equiva-lent~;
i~ocyanat~ aqui~al~nt ~ t42/(NCO~)~ X 100;
polyol ~quivalen~ a tS6,100/1OH-value)3 X 100;
NC0~ a nitrog~p-carbon-oxygen parcent; and OH ~alua a hydroxyl ~alu~.
Th~ pre~ent polyurethane c~ ~a us~d in a hot ~u~ing.
10 applicat~on, such a8 hot ~u8ing a ~h~e~ of polyurQthane ~o a co~p~r~m~nt floor o~ an automo~ile, ~eca~e the poly~r-ization r~action is ad~usted by ~hi~ing th~ i50~y~n~te index, prop~r ~election o~ t~e i60cy~nat~ reactiv~ co~po-~ent and i~ocyanate ahd the use of ~h~ inorga~ic iller.
15 Preferably, th~ i50cyanate ind~x i8 in a range of about 54 to about 55, wh~n other co~po61tion~ are det~rmined as ln EXaMP~ES S to 7. Thi~ range var~ widely wh~n th~
composition ~S changed and can b~ in the range o~ a~ou~ ~o to about 65.
For the composi~ion8 o~ EXA~P ~ S 5 to 7, below; th~
hot ~u~ing charact~r~ tic a~ar~ a~ ~n isocyanate ~dex o~
about 55 wi~ no melting occur~in~ at an i~ocyanat~ ind~x not le~s th~n a~ou~ 60. At an i80cy~nate index o~ about 50 ~h~ polyurethane dr~ps ~rough hole~ ~r dIip~ ~ro~ propsr 25 posi~ion~. -Th~ ~ollowing Examples ar~ giv~n by way of lllustra-t~on and not by way o~ illu~ration~

EX~MP1~ 1: VIBRATION DAKP~N~ MAT~R~A~
Vi}~ation da~ping material was prepar~d ~y ~ ng 4c 30 wsight par~æ Or ~icyclop~ntadie~ r~ [an al~cy~lic rs~i~
ha~ing 5 car~on ato~, a nu~b~r a~erag~ ~sl~cul~r w~ig~t o~
3809 a~ 0~ Yalu~ o~ ~20 ~illl~ra~ potas~ium ~ydroxide p~r UJV,Wd~ol -1~- 2090~76 gra~ (mg XO}I/g) and a sof~cening po~ nt o~ 100C. ~ and ~o weighl: part~ of polypropylene glyco~ (a polyox~a~cylena gly~ol having prim~ry OH ~d group~, 2 ~unctional group~
and an OEI valu~ o~ lll mg KOHJg) mixed in liquid ~orm at 120~c. T~ resulting liquid Jaixtu~e had a visco6ity of 7,400 centi~oi~e (cp~) at 25~ and 1,200 cp~ at 60C.
~h~ ~ixtur~ was then ~lx~d wi~h 37.3 weight parts of p~lyphQnylene poly~thyli80cyanate havlng 2.7 functional i~ocyanat~ group~ psr i~oc~anat~ moleculQ, a NC0% of 31~
and a viscosity o~ 200 cp~ a~ 25C., 0~72 weight part~ of triethylenediamine a~ a catalyst and 0.72 weight part~ o2 dim~thylpoly~iloxane a~ a co~pati~ility agent to produce a co~po it$on. ~ix~ng ~as do~ at 60~C. I~edia~ely th~re-after, the co~position wa~ pou~e~ into a ~old 1 (FIGURE 1~
ha~ing a ca~ity 2. Th~ t~mperatur~ o~ ths ~old 1 at the tim~ of pouring ~a~ about 23C. A~ter a ti~e pariod of 5 m~nutes, a polyure ~ an~ ~olding 3 ~FIGURE 2) ~o~ damping vibr~tion was re~ov~ ~rom th2 mold 1. The ~p~ci~i~ weight o~ the m~lding was 1.1.
~u~. a freely 6~ap~d ~olding can be obtained in ~ev-eral ninute~ wit~out requ~rin~ a larg~ amou~t o~ ~nergy.
The re~lting mol~ing c~n have a complicated, cu ~om made -Qhap~ which per~i~ it to ~e utillzed to damp vibr~tion~ o~
equ~pm~nt ha~ing complicated shap~.
A 200 mJa x 10 mm x 4 ~m strip ~as cut ~ro~ t:~ mol~ing 3 and bonded to a 220 mm X 10 ~m x 0.8 m~ ~PCC cold rolled st~el ~he~t us;ir~g ~n adh~ e to produc:~ a non-re~'cric~ion typ~ brat~on da~p~ng m~ber. ~ 108~ factc~r of the me~l:er was msa~urQd in accordano6 with tI~e Dle~od ~i~ilar to ;~ASO-M306 and N329. Th~ ~easure3~ant te~nperatllre ~as set to roo~3 tempo~atuic@ (about ~5C~ ~ 40~C, 60C, 80 :: and lOO~C. ~I~URE 6 s~o~rs the tRst.r~s~u~:~ ~or the ~ r of -19- 20~7~

S 1, 2 and 4 (which ar~ di~cu~ed }:elow) and CS)MPA~-ATIYE EXA~I.ES 1, 2 and 3 (which arE~ di~cus~ed below).

EX~LE 2: MOI,13I~G I~t:LUDING SOI.ID FIT~
As ~3ho~n in FIGURE 3, a mold 5 having a 200 mm x 200 mm x 3 m~ ca~riSy 7 wa~ prepare~ ~y adhering a l9o ~nm x 190 mm pi~ce o~ double coated adhesi~re tape 6 in ~h~ cavity.
The tap~ 6 ~das on ths inn~r bottom ~3urfac~ of th~s ca~ity 7 with an adhe~ive layer 8 racinq upward. T~en, 104 gra3n~
(g) of qranulated calcium carbonate as solid ~iller 9 w~'ch a ~rain ~iz~ o~ a~out 3 ~a ~a3 sc2l~2rQd onto the adhesiYe layer ~. Th~ com~osit~on o~ wa~ prepared and 193 g were pouxed into th~3 awld 5 whos~ te3l~p~rature wa~ 23 C.
The~ pouxing pres~ure ~as abou~ at:~ospneric pressure. A
polyur~thane molding having th~ granulat~d cz~lcium carbon-a~e al~o~st uni~ormly disb~ d in ~he mold~ ng was re: noY~d ~rom the mold s a~ter f iv~ mimlt~s . The :mold~ng had a sp~ci ic weig~t o~ a~d th6~ f illQr made up about 3 5 welgh~ perc:ent o~ ~he D~olding.
A~ in EX~L}~ 1, st~p~ wer~ cut ~rom the molding, one etrip was ~ecured to a gtael plat~ and ~che 10~8 ~actor ~a~
measured. FIGua~ 6 sh~ hat thla molding of EXA~PI,E 2 ~ibi'c~d a h~gher damping vibra~ capability ~an ~ch2 COMPA~It7E EXA~?IE~ 1,2 and 3 at temperatlar~3~ graateY than about 30C.

EXA~L~E: 3: MOI,D~NG PRODUC~D USING A s~:E;!r OF POLYET~YL-E~ ~VING ~ ~ESIVE Lax~
E 4 a~how~s a polyet~yls3rl3 ~h~t ~0 ~a~ing an a~e-siv~ layer 8 on on~ ide. ~hQ ~he~ 10 wa~ brought into c108~ contact ~dith ~ C21Vity ~ ac~ 1~ o~ a mold by ~acuu~
shaping a~ an elevat@d temp~rakure ~uch that th~ ~dhe~1Ye lay~r 8 faced up~axd. ~h~n, 10~ g o~ nula~d calciw carbon~te ~o~ 3r 9 ~ c:~t~r~ad on~o the ~ee~ 10.

~ -2~ 2090~ ~6 Th~ c~pssition of EXAMPL~ 1 wa~ prepar~d and 90 g werc pour~d into the mold who~e tempera~u~e was 23C. Th~ pour-ing pressure Ya~ a~out at~ospheric pr~ssure. A poly-urethane ~olding 1a tFIGURE 5) w~ re~oved a~ter fiYe ~in-ut~ he calciu~ carbonate wa~ uniformly di~tributed throughout the ~olding.
Th~ damping ~ibratisn capability, aB determine~ by the test procedure o~ EXAMPLE 1, Ya~ co~parabl~ to that o~ ~he molding o~ EXA~PL~ 2.

~X~PLE 4: PO~URETa~N~ ~OLDING CONTAINING GLASS ~ RS
A ~olding ~a~ made usin~ the co~po6ition o~ ~XaMP$~ 1 to which ~a~ addæd gla~s ~ibar~ ~ulverized ~nto a ~ize oP
about 3 m~ a~ a ~olid ~i~ler an~ a ~old ha~ing a 200 ~m x 200 ~ x 3 ~ ca~ity. Molding wa~ ac~ompli~hed u~ing a RR~ proc~ hat i~ ¢onven~ionally utilized ~or ~aking automobile bumpar~. ~h~ co~po~ition had 42 g o~ filler added to it and the f iller constituted about 18 weight perccnt of ~he total weight of the comp~ ion and filler.
T~ ~p~ci~ic weight o~ th~ mold~ng ~as 1.1.
Th~ lo~ ~actor wa~ det~rMi~d ~n aecordanGe w$th th~
~est procedu~e d~cribed ~n EXA~P~ ~. Th~ t~t re~ult~
ar~ ~h~n graph~cal~ly in FIGUR~ 6.

CO~P~R~TIY~ ~xa~P~ PO~YVINYL CHIORID~ AND ACRY~C
RU~B~R VIB~ION DAMæING ~AT~Ia~
A 3 m~ th~c~ 8heet o~ vl~ra~ion da~pîng ma~er~al t~at included polyvinyl chloride and ac~ylic rubbsr waR utilized as a co~ar~son. The ~peci~ic w~lght o~ ~h~ ~aterial was 1.8.
The 10s8 ~sctor wa~ d~t~ined ~n a~cord~nce wi~h the t~3t proc~du~e describea ~n EXR~P~ Th~ te t re6ult6, a~ graphically illustrated ~n FIGURE 6, sho~ a ~igni~icant ~0~0~76 decreas~ in lo~ ~actor as ~hQ tempe~a~cure irlcr~a~ which i3 unde irab~e~

CO~PARP.TIVE E7~1~ 2: ~T~SRI~ CONTAINING MICA
A 3 mm thick sheet o~ vib~ation da~pin~ mata~ial simi-lar to ~a~ of co~D?A}~ATnns ~XP~LE 1 ~u~ inc:llad$ng orlented mica wa~æ uE:ed a~ a co~ari~on. ~ speci~lc weight of the ~aterial was 1.7.
The los3 ~actor wa~ determined in accordanc~a with the t~a~t proGe~ de~cri~e~ ill EX~ 1. The te~t se~ults, ass graphically illustrated ir~ NGtJRE 6, show a ~igni~icant dç~creaE~e in 1088 ~ao1:or aa the teml?oratur~ increa~e~ ~hicb, de~ irable .
Limitations in ~or3nak ility exi~t bscalasa many piec~:
of the m~ca are orieated to incr~aRe daDIping Ylbration capability, CO~PARATI~ XA~I,E 3: EPoXY ~EsIN DAP~ SATERIAL CON~
~aG GLaSS ~IBE:RS
A 3 ~sm thick ~heet o~ epoxy re~n fill~d with a very ~all a~ount of ~lz~ ib~r~ was produced a~ a vibration da~ping D~at~rial. ~e ~pec~ic w~ight o~ t~e ~aterial was ~e 1D~ ~actor wa~ d~t~rmin~3d iTI acaordarlce with th~
te~t procedurs ds3~ rib~d iIl EXA~L$ 1. Th~ te t res~ults, a illuntrated graphically in FIGURE 6, ~hcw ~hat th~ 10~38 r'ac~or s~rt~ ~ and d~ reas~ which if~ unda~ira}~

CC)~ TI'VE ~3XANP~}i 4: VT~RATION D~lPING ~ERIAL P:E~O-t~U~ dI~IOUI! PR~IXI2~G T~
CYGLIC ~3:SI~
followinq components o~ CS~D~pO ition dl~clo~ed in 13~LE 1 w~ ix~d in a suit~l~ containsr: pxopylen~
~lycol; î~ocyaDa~; cataly8t; arld co~pa~i~sility agent. ~he uJv~w~w~

2090~76 alicyclic ~in wa6 introduced into a ~old haYing a 200 mm x 20~ ~m x 3 m~ cavity. T~e ~ixture of the remainlng com-ponents ~a~ introduc~d into th~ c vity containing the ali-cyclic r~sin. The te~pQrature o~ th~ alicyclic re~in and the re~aining co~pon~nts at pouring wa~ 23C. A molding wa~ removed ~rom th~ ~old a~t~r five minutes.
~he loss factor wa6 det~rm~ned in accorda~ce with th~
te~t procedure de6crib~d ~n EXAMPLE 1.
T~ lo~ ~a¢tor wa~ about 0.01 in th~ range o~ 20O to lo 100C with a capacity o~ dampi~g vi~ration~ far in~er~or ~o tha~ of th~ ~olding o~ EX~MPLE 1. Th~8 sho~s thQ de8ir0 ability o~ mixing the ~licycl~c rQ~in ~i~h the pr~pyl~n2 glycol (th~ i~o~yanate r~ac~iv~ compon~nt.~ prtor to intro-duction into ~h~ ~old.
Th2 polyuxeth~ne mol~ing gui¢kly harden8 without u~ing a large amount o~ cat~lynt th~ increa~ing ~o mo~ding 3peed an~ exhibi~ r~a~k~ly lmprov~d da~pin~ ~ibration capa~ility. I~ i6 pr~sently b~ Yed tha~ thes~ r~ul~s are achleved becau~ the r~c~on b~tws~n the isocyana~
20 reactivo co~ponent and the i&ocyan~k~ readily occurs and th~ alicyclic re~in ha~ ~un~ional group~ that produc~ a telech~ric polymer. T~3 golid illQr, when u~d, i8 u~i-formly dis~ribut~d in th~ ~olding b~cau~e thQ ~ r i5 di~persed and ~ixed onto th~ mold ca~i~y ur~ace bs~ore the 25 compoE~ition i~ in~ro~uced into th~ c:a~rlty. Thi~ provide6 a vi~r~tion da~pin~ ~noldl;~g h~ving ~n i~pro~re~ capability o~ da~ping vi~ratio~.

EXAMP~E ~: POLYURETHAM~ ~OL~IN~ PRO~UCED USING AN IS0-CYA~A~ INDEX 0~ 60 In a 6ui~abl~ Ql, 40 ~ight pa~ts o~ dicyclo~enta-~iene r~in and 55 w~ight part~ og polypropylene gly~ol, ~o~h o~ Yh~ch are d~cri~d ~n EX~P~ 1, an~ 5 w~ight part~ o~ etbyl~ne ~lycol a3 ~ low ~ol~culax ~ht polyol o~u~w~v~
-2~
~9~6 were ~ix~d at a ~e~pera~ur~ o~ 120C. The ~e~per~ure of the mixt~re was then reduced to a temperature o~ 60C.
The ~ixture wa then mixed with 34.7 weight parts of polyphenylene polymsthylisocyanate, which i~ de~cribed in EXAMPLE 1, and 33.7 weight part~ of gla~s ~ rs a~ an inorganic filler prior to mixing ~hQruwith a ~olution of 1 weight part of triethylenediam~nQ and 1 weight part o~
dimethylpoly3iloxane to produce ths compQsition. Then, the co~position wa~ poured into a ~old 14 (~IG~RE 7) having a 200 ~m x ~00 ~m x 4 ~m ca~ity 16. Prior to introdu~ing the compo~itlon in~o th~ ca~i~y 16l 61 g o~ g~anulated calcium carbonate ha~ing a ~rai~ ~ize o~ about 1 mm in dlam~ter, had bean sca~tered o~ th~ cavi~y ~urface a~d held there u3ing a~ adAe~iv~. ~h~ t~mpe~at~ e o~ ~h~ ~old was 24C to 26~C. prior to adding th~ compositio~. A~t~r ten minute~
wlth the ~old 1~ expo~sd t~ room t~mp~ratur~, a ~lat sheet of polyur~thane ~olding 18 (FIG~R~ 8) ~o~ damping vibra-tions ~a~ re~oY~d ~rom ~h~ ~old 14.
~ 200 ~ x lO ~m x 4 ~ ~trip wa~ ~ut ~rom th~ molding 18 and hot fused tn a 200 m~ x 10 ~ x O.8 SPCC co~d-roll~d st~ heet at a temp~raturQ of 150~C ~or a time pe~iod o~ 30 mi~ute~ to produca a no~-restriction ~ype ~ibration da~pinq me~ber.
Th~ co~binQd lo~s ~actor o~ tha ~emb~r wa~ mQa~urad in accordance with a ~thod ~ilar to 3AS0-~306 and 329. Th~
~ea~ur~merlt ~e~p~ratu~s ~ 20o ' 30~ ' ~oo ~ 50, 60~, ~0 and 100C.
T~e t98~ re ult , a~ graph~cally illu trat~d in FIG~RE
10, sho~ th~ sup~riority o~ ~he non-rQskriction type ~ibra-tion da~ping ~ember o~ EXa~PL~ 5 ~ campared to ~h~ non-re~tr$ction type damping me~b~r~ o~ CO~A~ATIYE EXANæL~S ~, 6, 7 and 8, which ~re di~cu~s~d in ~ore detail below.

~50.~0261 -2~ 20~0~7~

Par~icularly, good damping vibxatiorl capability wa~
exh~ited ~or t~e 10~B ~ac~or in t~e range of 200 to 400C.
whis:h is r~3ar roo~a temperature. Al~hough the re~onation peak wa~ too flz~ at t~ c:)8~3 ~actor above 0.4 to ~etermin~
a hal~-value width at th~ height o~ 3 ~b and no measur~m~nt could be made, ~uch a high l~el o~ c~pability had never been previously achiev3~d with conven~ional, non-rsstriction vibratic:~n damping ~ember~.
~h~ compo~ition ~as t~en us~d to ~parately fa~ricate mold~ng ~ample 20 ~FIGURE 93 ~hich ~ad a sp~ciflc weight of 1.~ and wa~ ~00 ~m X 200 ~m x 4 ~m in ~ZB. The ea~ple 20 wae placed over a ~teel ~hQ~t 22 having lrr~gularities.
T:ne ~ampl~ 20 and st~el sh~t 22 were expo~;ed to a tempera-~ure ol~ 120C ~or a ~me period Qf~ 10 minute~ to de~ermine whathQr hea~ and gravity would cause the ~a~nple 2~ to CS~
~orm to ~he i2regu1ar ~ ace, Under these conditio;~;, the sample 2 0 did not hot ~u5e ~ecau~-e tl~ wa~ no melting .
Thus, the ~aterial o~ this ~isxampl~ provided ~uperior vibra-tion da3~ping bu~ wa~ no~ ~;uitable for application6 where 2 0 hot ~u~ing is~ d~ixed .
TABI.E 1, bel~w, is3 a com~ilation of whether or not fu~ing occurred usin~ the ~ate~ial~ of IZ:X~5PLE5 5 ~o 7 and COMPAR~TIVE ~PLES 5 'co 8, which ar~ discu~;sed belo~r.
S~l I

.~ ----l EXAMPLES COMPARATIvE ~XAMPLES
~_: _c ~ ~ _~ ~ , , ~ 6 7 ~ 6 ~ 8 _ __ __ _ _~ . . . __ .
X~ossy~nato 60 55 so 1,00 _ _ _ __ ~ _~ ___ ___ ~ ___ ~h~al~e~ (D~1 4.0 4.0 4.0 4.0 ~0 3~0 ~.0 ~ __ ,_ __ __ ~ __ ~p~u~g~o a.s l.g ~S ~.~ l.B ~-7 3 0 ~eight ~ . ___ __ _ __ __ 2 ~ 7 ~
--__ _I , . ~__ j Fu8~D.g ~ ~oat t~o y~s ~o 2~o 1 ~o 2Jo ~o a~ gr~ ty ~_~_ ~ _I __ ~_ c_ PI,B 6: POLYU~Eq~NE ~I,DING PRODUCED USING A~ ISO-CYANATS IPJDE:X OF 55 A compo:~ition ~;imilar to t~at o~ EXA~LE 5 ~as pre-pared but ~h~ alicycli c re8in~ po~ypropyl~ne ~lycol an~
polyphenylene polymethyli~ocy~nata ~ere u~;E2d ~n amounts ~o providQ an isocyanat~ i~d~x o~ 55~ The re~ulting compo~$-tion waE; pour~d irl~o th~ mold 14 o~ FIGU~ 7, that i9 d~-~c~ibed in ~3X~I.E 5, 'co produce a polyurethans ~olding.
The combine~d lo~s ~actor wa~ msasured in accordance ~it~ ~ proc~dure d~c~ibe~ ~ n EXA~I,E 5 .
A8 shc~wn in FIGUR~ 10, t~e te t x~sults for the poly-uret~ane ~olding o~ thi~ ex~m~le e~how it~ ~uperiority to matsrial~ ~ade ill acc:ordanc~ COMPAR~TI~E EXA~LES 5, 6, 7 and 8, whicll are d~ cribed b~ w. Good da~nping vibrz~-tio~ c3~p~bili~y wa~ exhi~itad and ~e 108~ ~actor could r~ot be ~nea~ured at near roo~ ~emE~erature. Such a high lev~l of capabilit~ had nevs~:c been a¢hi~vQd with ~ny co~ventional non-rs~tric~ion vibration da~nping ~erO
In accor~lanc~ wit~ tha tel3t procaduro de~cri~ed in ~X~LE 5, i~ was detQrmin~d t~lat the mat~rial o~ th~
~xa~pl~ ~a~ caE;~bl~ o~ ho~ ~usir~g.

EXalgPL~ 7: POL~URET}~E IIOIDI~G PROI~UC:~SD USTNG AN ISO-2 5 C~a~ATE ~ D~X OP 5 0 A colapo~ition 3imil3r ~o that o~e X~L~ 5 wa~ pre-parsd but ~h~ alicycllt: r~6in, polypropylene~ glycol and polyphsnylen2 poly3~e~hyli~ocyanate wer~ u~d in amou~ts to ~rovid~ an isoayanat~3 ind~x o:e 50. q~hQ resulting coDIpo~i-tion ~a~ pour~d inte~ thç~ ~ol~ 14 o~ F~URE 7 to produce a ps~lyurethane ~slding.

v~U.W~l -26- 2~9~7~

In accordance wi~ the te~t pro ;:edlar~ de~3rri:b~d in EX~LE 5, it was ~etla~rmin~d that the material o~ thi example ~as exce~6ively hot fu$ed 60 that lt was not appli-cabl~.

CoNPARATIVE EXAPIPL'E 5; POLYUR~ll~ MOI-DINt; PRODUCED
USl:NG AN ISOCYANA'r:113; INI)EX OF 100 A coDlposition ~imilar ~o that o~ EX~L~ 5 was pre-pared but tha alicyclic resirl, polypropylene glycol and polyph~nyl~an2 poly~et~yli~ocy~nat~ wer~ u~3ed in amount ~o proYid~ an isocyanat~ ind~x o~ 100. ThQ r~sulting CODlpO~i-tion wa~ pouræd in~o ths ~ol~ ~4 o~ FIG~JRE 7 that i~ d~-~;cribed in EXAMP~ 5 to produc:e a polyurethane ~clldirlg.
~e com~lned 106~ ~actor and the ~ot ~u~;~ng charact~r-istit: were detex~ined irl ac~:ordance wit~ t~e procedu~es di~clo~ed in EL~LE: 5. The r~3ult3, as ~hown in FI~URE 10 and T~B~: I, is~dicate good da~ping bu~c ~here waE~ no }~ot fu~ing.

Co~D?ARATIVIS ~X~I,E 6: ~ATEE~ MADE USING POLYVINYL
C}~O~DE A~l) AC~YLIC RtJB~
2 o A ~heet o~ ~ribration dampislg material havl ng a ~c3cnes~ of 4 ~m an~ a ~p~ci~lc g~a~ity o 1.8 was coalven-~onally madR u~ing polylrinyl chlorid~ ~nd acrylic nabb~r.

T~ coD~ined 106X rac1:0r a~d the ho~ ~u6ing c31aracter-~stic were ~ rmined in accor~anc@ vith the tes~ proc~
dur~s~ di~elo ed in EXA~P~E 5. q~h2 r~8Ul~R, a8 sho~n in PIGUR~ 10 and ~ I, indlcat~ poor da~ping and tha~ ther~
was no hot ~u~inq.

~O~ TIVE ~XA~I.E 7: ~aT~ co~rplNING ~IC~
A 3 ~am thicX ~heet o~ Yibratio~ ing ~aterial si3~i-lar to tha~ o~ PA~$~ EX~I.E 5 but including or~nted ~5~ 261 209~7~

mica wa~ us~d a~ a te~t compari~on. The gpeci~ic weight of the l~atex~al was 1.7.
T2~e eombin~d 106~; factor and the hot :eu~ing character-i~tic were dete~insd in ~ccordancQ wi t~ the test proce-dures described in EX~LE 5 . Tl~e result~;, a~ ~ho~n i n FIGU}~ lo and TABLE I, indica'cç~ poor dampi~g and ~at there wa~ hot Iusing.
Limitakions in for~ab~lity eXi8~ becau8e many piece~
of tha mica ar~ orie~lted to lncr~ase damping vibration capability.

Co~IPARATIYE EX~LE 8 ~ ERI~ CONT~NING ASY~T
~ 6h~et o~ vibration d~nping matQrial 4 mm thick and having a speci~ic gravity o~ 1. 5 wa~ con~entionally ~ade using asphalt.
lS ~h~ c:ombined 108~ ~ac~or and the hot `u~in~ charac~er-i~tic werQ dstermin~d in ~ccordanco wit~ ~he te~t proce-dures de6cribed ~ n ~XA~I,E 5 . Th~ r~a~ult6, a~ ~howT~
FIGIlRE 10 and TABI,E I, in~cat~ poor ~ ping and that there was no hot fus~ing.

EXAI~LE 8: POLYT~RE~IANE: ~OI~ING PRO~UC~D USI~G AM
ISOCYa~E IND;@.X OF 70 At ~ te~E~erature o~ :1 20C., 40 weigh~ part~: o~ tha dicyclopenta~ e r~in with 60 ~ ght parts o~ poly~ther polyol has~ing 3 runctional groUp~ and arl 0~ value o~ 285 lag 2 5 KOH/g we~e m~ xe~l. The f ~st mi2~urE~ wa~3 then c0012d to a ~e~pera~ur@ o~ 60C. Tha ~ir~ ~ixtur~ wa~ th~ ~ixed, at room temp~rature, witl~ ~3~8 w~ight part~ o~ e polypher1yl-ene polymE~thyli~;ocyanat~a or EX~lPI E S and 25 wei~t parts oP ~la~s ~ibers prior to ~ixi~g 1:1~æ~to 0.4L veight par~ of triethylen~ d~ ne as a catalyst and o .. 4 w~ ht parts o~
d~me~ylpolysiloxane a~ a compa'cibility açl~3nt to produc~ a composition. Th~ i~ocyanat~3 ind~x ~a~3 70. Prior to intro--28- 2 ~ 7 6 ducing ~c~e composi~on into ~he mold cavit~ ~ 5 (FIe~ 7) 2, 61 g o granula~d calcium carbonat~ having a grain ~ize of a~out 1 ~nm in diameter had been ~cat~ered on the caYity ~urfac~ a~ held ~ç~r~ u~ing an adhaeiYe. ~ ~lat polyure-t~lane molding sh~e~ ~8 ~FIGURE ~ for da~nping v~ration ~as obtained.
The combined 108g ~actor wa6~ ~easur~d in accordance wi~ ~he te Eat procedur~a de~cri~ed lrl ~A~I.E 5 . ~he ~e3t results, as graphically illu~tr t~d in FIGU~ 11, ~how ~he s3llperiority Or the po1yurat~an~: ~olding of ~ example a~3 compar~d to t:hat o~ COa~P~TIVE~ 9, w~iah i~ di~s-cu~ d ~elow. ~rhe high 1eve1 of capability had never bQ~n achieved with any co~ent10rl nor~-restr1ction typQ ~ibration da~pirlg ~n~mber~ be~or~:.

13XA~PLE 9: USE OF RE~IN ~ G NO T~SRalINA~ OHs ~ composition ~i~ni1ar to ~at o~ EXAlfPI.E 8 was pre-par2d by r~placing 20 veight-part~ the dicy~10~ diene r~sin with dicyclopentad~ ha~i~g a number average mo-1ecu1ar we~h~ o~ 420~ a aponi~cation v~lue o~ 175 mgKOH/g]~ a reBin having carbonyl group3 but no 0~15 at ~he end~ . Tbe i~oc:yanat~ index was m~ ain~d Zlt 7 0 . A
polyur~thane molding was pro~uc~3d iSl accordanc~
proc~durs d~a~crib~d in ~ lS 8.
$he co~in~d 10~38 ~ator ~a~ ~asured by t~ae t:~81;
procedur~ de criLb~d in ~E 8. Th~ t~a~t re~ults ho~
that the Iholdirlg o~ ~h~s exam~le i~ superio~ to ~he ~a'c~ri al of CO~PI~ATIYE EX~ 9, di6cu~s~d below, as ~ sho~n isl FIG~R~ 11. q~ high le~el of capab~lity had ~ever b~Rn achieved with any c:orn~an~ion non-re~triction type vib~at~on ~0 da~ping ~amber~ b~PorQ.

EXal~L~ ~0: USE OF ANOq~HER ALICYCL~C RESI~

2~90~7~

A compo~it~ on ~imilar to that of ~XA~LE 8 ~a~ pre-pared bu~ 2 o we~g~t pa~ts o~ ~ dlcyclopentadl~e re~in Wil5 rQplaCed ~ith c:ou~ons-indena res~ which i~ an a~
clic re3in ha~ving 9 carbon atom~, a number average ~olecu-lar weight of 64 o and no ~unctional end groups . Tihe iso-cyanate index w s m~intainQd at 70. A polyurethane molding wa~ produced irl accordance ~ith ~hs procedure disclosed in EX~LE 8.
~he com}~ined lo~ ~Eactor was measured by the ~es~
procedure dç~scribed in EX~?LE 8. Thç~ re~3ults sho~ ~h~t ~he molding o~ thi3 example i~ ~uperior to the ~a~zrial of COMPA XA~I,E 9, discu~s~6ad below, a i~ ~shown in FIG--11. The high l~v~l o~ capability had never b~en achievad wi~ any corl~ention non-r~triction typQ vibration 1~ damping mQmbers bQ~Eore.

COP5~ IVE EX~LE 9: CO~IONA~ PO~
A convsr~tional polyur~t~an~ t~a~ ~ ;; u~e~ in au~omobil~:
b~per~; wa~ te~ted. Tllis polyu:ce~ane ~a~ produced by mixing 100 weight parts o~ poly~3thar polyol, 20 weight 2 0 part~ o~ ethylene glycol as th~3 polyol of low ~nol~cular w~ight, 5 velght part~3 o~ di~n~ nodip~nylmet;~an! as thQ
aro~atic am~e and ~5.4 ~ighl: part~ of li~u~d d~phenyl-me~hane diiQoc:yanat~ (NDI~ ha~ing a~ ~7co~ of 24~S. Th~
i~ocyanate index was 100. ~h1a r~asultinçl ::ompo~it~on ~a~
mad~ into a poly~ thal~ molding ~y th~ ~ae~od di~clo . ed in EX~PL~E 8.
No alicyclie re~in Wil~ u~iliz6~d~
Th~ co~bined lo~ acl:or wa~ d~t~rminsd in act:ord~nca w~ th the teQt proce~ 3 d~cribed in B~I~E 8 . Thla te~t 3 o results are ~how~l in ~IGURE 11.

~xa~ PO~Y~rHAN13 H~I~G A3~ ISOCYAN~T~ ~DEX OF
62 WI~OUT FIIL~

6Sl~.~2~1 3~ 209~7~

A composi~ion si~ilar to that o~ EXA~: 8 wa~ u~d bu1: the alicyclic re~in, polyol and i~ocyanate ~ere u~ed in amount~ to ~chiev~ an i~ocyanate index of 62. A polyu~e-thane mol~aing ~a~ n pro~uced by intro~cing the co~posi-tion into the mold ca~ity discu;;~d in li:XA~I.E 8, but with-out th6~ calciu~ carbonate.
The co~bined 10B8 :Eactor was determined by bonding a strip to the steel ~heat a de~c:ribEId in 1~ E 8 and fux~ r bonding ~o ~e ~trip a 220 m~a x 10 mm x 0.4 Dm thick SPCC cold-rolled ~eel s~heet. A restrictio:n ~ype ber ha~ing a ~aIldwich ~ructurEI was produ~:ed. The rs-. ults o~ the co~bin~ 109~8 ~actor 'cast are di~closed in FIGI~RE 12 .

EXa~r.E: 12: POL~}~ tING AN ISOCYANAT}3 INDEX OF
6Z WIT~ FI~R
~ CO1nPO~itiOn iden~iCa1 tO ~at 0~ EXA~LE 11 Wa8 PrOdUCed. ~ PO1Y~r~athane mO1d~ g Wa~ 'then PrOdUC~3d bY
in~rOdUCing the C01~03it:iOn intO th~ mO1d~ C~VitY di~;CU88~d in EXA~PLE 8, inC1Uding l:he Ca~iU~ CarbOnat~
~e COmbined 19K5 faCtOr Wa~ me~6Ured in aCCOrdanCe ~ith `~hÇI te8t ~rOCE~dUre ~ C1O8e~ 1n EXA~SPLE 11. ~he~ te~t re~isult~ are ~ho~n in ~XG;T~RE 12~

EXA~LE 13: poI~ aNE ~tING AN ISO ::~RTE IND~X OF
80 WI~HOU~ FI~
A composition ~imila~ ~o tha~ ~ EXA~PLE: 11 wa~ pro-duced b~t ~he isocyanake ~d~x wa~ 80. A polyurethane ~olding was then p~odu ::~d by i~troduci~g t~aæ co~apo~it~on into th~a mold cavi~y di;cu~d in ~WI.~ 8, but wi~hout ths calciuh c~r~o~lat~
3 0 The com}~ined lo~ ~ac~o~ wa~ ured in accorda~ce with the t6~ proc:edur6~ disc~o~Qd in ~P~æ 11. Th~ test rs~ul~s are ~hown in FI~ 12 65~61 - 2~90~6 EXA~P~: 14: POLYU~NAN~: ~VING AN ISOCY~ATE INDEX OF
8 0 WIT~ A ~I~
A composition ~imilar lto tha~ of ~:XA2~LE ~1 wa~ pro-duced but tl~e i~ocyanat~ index wa~ BO. A polyurethane moldin~ was then produced by in~roducing the co~pol3ition into th~ mold ca~ity di~cu~ed in EXAPIPL~13 8, including the calcium carbonate.
The comb~Qd 108fs, ~actor was m~2a~ured in accordance with the ~e~st procedure d~clos~d in ~ PLE 11. The test r~ults ar~ ~hown in ~IG~R33 12.

CO~n?ARATIVE EXA~LE 10: CûNV~IONAI, r~aTERIAL INCI.~DING
ASPHAI,T HaVIN~ A ~30~ FOAM RAT~
A ~h~st o~ Yibration damping ~t~srial l~aving a foam rate o 1309c (due ~o the t~peraturR~ ~Eoa~Dins~ did not oc-c~r), a thickne~E; oP 1.65 ~ a~d a ~p~cific grav~y of 1.47 Yas made using foa~ asphalt.
T~e com~ined 108~3 ~actor was mea~ d in accor~ance wi~h ths proc~dure d~sc:lo~d in EX~PI,E 11. The t~t rP-sults ar~ s~own in ~ 12.

2 0 COMP~IVE EX~I E U: co~v~arIoNAL NAT~ IN~UDING
P~SP~LT }~VI~G ~ 150~ TE
A a~hee~ o~ vibration da~pi~ag D~tQrial haYing a ~oa~
ra'ce o~ 1~0%, a t~ickna~ o~ 1.55 ~ alld a ~peci~ graYity Or 1~ 47 wa~ 2~ade u~lng ~oa~ a~phalt~.
The coD~bin~d los3 ~cz~or wz~ asur~d irl acc:ordance~
with t~ proc~3dllre dl~c:losed in ~ 1J Th2 te~t r~-sult~ ar~3 ~ho~n irl FIGUR~ 12r .
COME'I~TIVE EX~E 12: CO~E~TIONA~ ~ INCLUDI~G
AS~T ~A~ING A 200% POP~ RA~E

~S~
-32- 2~90~7 A she~ of vi~ration ~a~ap~n~ rial haYinq a ~oa~
rat6~ of 200%, a t~ic3cnes~ of 1.80 ~ artd a .peci~ic grilvity of 1.~5 ~ag3 mad~ u~ing ~oz~ aAphalt.
l~e combin~d lo~s factor wa~ measured ~n accordance S with the procedur~ disclos~d in EXa~LE 1~.. ThB test re-~ults ~re ~hc~n in ~IGURE 12.
The polyur~thane moldin~ ~or damping vlbration is ob~ained by ~ polyaddition reaction b~tqeen an i~;ocyan~t~
group and i~ocyana~s reactivQ co~ponent. T~e polyaddition r~a ::tion is adju-~ted by s~ifting th2 i80cy~nate index to . ue:h a point tl~a~ the polyuretl~ane Dlolding eachibits a de-~ired ~ molten r2~in charactarist~s: at a desir~d hot ~u~ing ~e~peratur6~. Th~ polyuret~an~: moldi~g haa a hig~
capabillty o~ da~ping vibratioJ~ n a~y conventional non-r~striction ~ype ~ibrzltio~ da~ping ~e~r~, and can ba îu~ed ~y h~at a~d gravi~ ~o~orphioally to a ~ ace, 8UCll aæ an auto~obile floor, with irr~ ariti~s.
~ hi~ inYention ha~ been de~::rib~d in ter~s o~ spec~lc ~mbodim~nt~: s~t forth in de~il. It ~hould be und~rstood, ~0 how~ver, that th~ e eDIbodimen~ 3; ar~ prese~ted by way of illustrat~on only, and tha~ t~l8 :InY~3ntion 'i8 not neces~ari-ly li~it~3d ~ersto. Modiric:ation~ and varlatisn~ within p~ rit and ~cop~3 of t,h~ lai~ c Sollow wlll b~
readlly appar~n~ ~oa~ d~clu~ , as thos~3 Qkill~d in 25 the art will appreFiate.

Claims (18)

1. A composition suitable for use in making vibration damping material, the composition comprising:
comprising an alicyclic resin having about 5 to about 9 carbon atoms;
an isocyanate reactive component; and an isocyanate.

2. The composition in accordance with claim 1 wherein the alicyclic resin is a telecheric polymer.

3. The composition in accordance with claim 1 wherein the alicyclic resin has at least one polar group.

4. The composition in accordance with claim 1 wherein the alicyclic resin has at least one group selected from the group of carbonyl, OX-, NH2- and NH- groups.

5. The composition in accordance with claim 1 wherein the isocyanate reactive component is a polyoxyalkylene glycol.

6. The composition in accordance with claim 1 wherein the isocyanate is an aromatic isocyanate.

7. The composition in accordance with claim 1 wherein the isocyanate has at least two isocyanate groups.

8. The composition in accordance with claim 1 where-in vibration damping material made therefrom exhibits semi-molten resin characteristics at a hot fusing temperature.

9. The composition in accordance to claim 1 wherein vibration damping material made therefrom can be hot fused.

10. A vibration damping material made from the com-position of claim 1.

11. The composition in accordance with claim 1 where-in the isocyanate index is in a range of about 40 to about 65.

12. The composition in accordance with claim 1 where-in the isocyanate index is adjusted to such a point that the polyurethane exhibits semi-molten resin characteristics at a hot fusing temperature.

13. A vibration damping member comprises the vibra-tion damping material in accordance with claim 1, wherein the vibration damping material has semi-molten resin char-acteristic at a hot fusing temperature higher than room temperature.

14. A composition suitable for use in making vibra-tion damping material, the composition comprising:
an alicyclic resin having about 5 to about 9 carbon atoms, the alicyclic resin being a telecheric polymer;
a polyoxyalkylene glycol having 2 to about 5 carbon atoms in the alkylene group; and an isocyanate having at least two isocyanate groups.

15. A method of making a polyurethane suitable for use as a vibration damping material, the polyurethane being capable of being produced in a mold having a mold cavity and mold cavity surface, the method comprising the steps of:
(a) mixing a composition comprising an alicyclic resin having about 5 to about 9 carbon atoms, a polyox-yalkylene glycol and an isocyanate; and then (b) introducing the composition into the cavity.

16. The method in accordance with claim 15 further comprising the step of applying a filler to the mold cavity surface, the applying step occurring before the introducing step.

17. The method in accordance with claim 16 further comprising the step of applying an adhesive to the mold cavity surface prior to the filler applying step with the adhesive adhering the filler to the surface.

650.00261

18. A vibration damping material made in accordance with the method of claim 15.