Document ByK8LVZjvqq8JVGyyXG7gmwzj

S.V.H.Hsrty\ D.B.Csmoron-brussolo t tlu c*-V( A7.l1 if> til? rW/ta>-V* Hr. f, A, Valkor Vur^thl Control* ttaitoA lo&AtoAoa Bortfortohlro. ' I2n4 Yprtl, 1966 ,, ,Pre Rf:CD2CJ b boar Nr. Vslkor, Further to our Ai*oulo os tho 19th April, | m% h! fcolow our rooonao&Aationo for roduolaf tho Aroolor 14# toxlolto hssarAo and lnToraktloo on B 4t> and NO# )6l, toohnloal tullotlas on tho lut aaaod jproftaoto oeo oaoloooA. ' tho Aroolor oonoantratlon la tho al oeadltloa rooa skoal< bo ouboUntialljr rodaood V onolooln* tho oroso abort tho thoraootat oloaonto art loft to Art# for >4 bouro and Auotlnf tho oibaaot f*o to oUoojphoro u.ln* tho yoolttvo prooouro la tho rooa. Vbo ouotMoa of Ohothor |bo aodirtooUooo oro ottffioloat to aafoly ooatrol tho Aroolor oonoontrailon At alt tlaoo lariat tho roar vlll havo to bo loft antll tho aollfiootloao boy# booh aado (pal tho ajroton tootot. Apart froa tho too 0* broiooln* of tho rofrUoratloa oyotoa taring ooll opollo, tho awbor of thoraootat Aloaoato bolat Irolaol la tho rooa At oqy (loon tlAo auot AOto a ooaollorablo offoot on tho oenooatratloA Of Aroolor vapour la tho fooa ont ao roooaaoal that thogr Ahoull bo kopt to f Ntnlaua. ' - VIth ratarl to buaaa protooUon ahon hondllnf Aroolor U41 vo b>oa of ao bool Atosao AhoaVlo of prooidli^; alotaato frotootion atalnot oontlnuouo Aonuot alth Aroolor. ' ~ wtotptmt that fot trill lot as boro Aotallo of a orooa aMob wootr* to bo oultablo for ttlnt pro* hour* froa Aollf . Vo roooaaonl tho tot of Xooal latoralttoat oontaot. < WOMs 090536 2- The only glovee that will be really suitable for a lone life with Aroolor are those made of Yiton, Bllloone Hubbar, JTfl. or Mylon. All other materials will ewsll appreciably In contact with Aroolor. However, gloves made of material realatant to Aroolor are very expensive and many companies prefer to use gloves made of less resistant material and ohange then more frequently. Thin polypropylene gloves have been found to be very suitable. On fags 1 of the teohnloal bulletin on HB 40 you will find information on the general phyaloal properties of the produot. The vapour pressure and ooeffiolant of thermal expansion are vary similar to Aroolor 1246 but the epeolflo gravity Is aaioh lower. Ve know that HB 40 Is being used as a thermostat aotuatlng fluid In the States but work on evaluating this fluid for this partloular typo of applloation has bean oarrled out privately by the ooopanles Involved. Although ve see no reason why HB 40 should not be used for this typo of applloation, ws are not In a position to reoommend Its use over Aroolor 1246, We will naturally givs you any data that will asalst you In evaluating the fluid but regret that the majority of information on the produot refers to Its use ns a plasticiser and not as a functional fluid. Ths prioe of HB 40 In 460 lb drums la 2/4d par lb pluo 10* I.C.l. You will note from the data on NOS }61 that ths boiling point Is above 000 r and ws see no reason why MCS }6l should not be used at temperature* up to this figure. MCS }6l la a polyphtnyl ether typ* naterlal and la avallabla at a prioa of D.8,/!20 per gallon f.o.b. St.Louie. The best produot for this applloation would be OS-124 but slnoa this la avallabla at J<l65 per gallon f.o.b. St.Louie, we feel that for your partloular requirements MCS JCl will provide a better flnanolal answer. The data ahaat doss not oontaln a Value tor a ooafflolant of thermal expansion but this oan bs oaloulated by using ths reolprooal of density versus temperature. J look forward to hearing from you when you have had an opportunity to study the oontsnts of this letter and the enolosurec. Yours einoersly T. BEHTPH-BPEUHTS MONS 09053 7