Document wgKdKpQya3Rd0KjvqZDL1Z7kQ

For Attention The RUBEROID Co. BOUND BROOK. N. J. V. 0, OOWUB Con to iMin. Abrehan. fteer, Laey, Duke HjLsZeIP -3 -5 Doti August 30, 1946 Rtfmnco Your Letter August 27 Sui/oct V.3, OTPS',* K-Fae Canadian Patent 434 1B2 X Bit* bees tery aueh Interested 1b studying the flee e la Ins greater la the hove patent. Theae are quite broad. The body of the patent eonld no doubt dlaeloae one or aore apeeIfla ozaaplea. fa weald very aaeh like to review the whole patent If a eopy la avaliable. be gather the following formula llalta froa the alalaa: Asbestos Fiber 5mW Oround Blast Furnace Slag 10 - 9)1 Colelua Hydroxide 3 - 42.9< PlatoMOCeoua kartb Alkali (Be CB) 3 - 42.5* 0 m 10< Celght of water (alnlaua) Three tinea the eoablned weight of aollda The lngredleata are sized and then pesaed through a high apeed relatlvely narrow apaea to fors a alurry of low settling rata. The re sulting alurry la traaaferrod to soulda and berdaned by autoclaving at a preasure In exeeae of 50/ per eta-re laah. The fomula la unique la that to aaaa a largo quantity of pulwerined bleat furnace alag together with a rather high average percentage of eauatie aoda. Clatocoeeoua earth la nerely a very finely divided, expensive, fors of alllca (which haa a loose weight of about 12/ par Oo. ft.) and la highly re active la a ealalllte type of forsula, because of the large surface area It oxpoaoa for a quick reaction. jhe writer cannot aoe anything la this forsula, froa either a coat, Manufacturing or product advantage ever any of our favorite alzea, to at preaent warrant our Further atudy or consideration. The analysis however in our files do show St both B-Tae and Mo approach our finished product rather closely la teat eh**'Cteristloe. This sorely Illustrates that a rather wide range of forsula *S_*!ueod to sake the product. * have beeu very curious to learn aoaethlng about their operating technique, particularly s, photo where they Mention passing the alx rapidly through aarrow apace to tew a alurry. I have since been told that their method la oeeentlally as followai* Hot water is Metered Into a alxer and the other ingredients earefullT weighed late It. The asbestos la added to the alz as re ceived, without previous deflberlag. This superficial alx Is passed through a Bauer Refiner which defibers the asbestos and 01-0213908 GAF 22732 For Attention Copy to Mr, t. C. enu BOUND BROOK, N. J. un( iknku, llitr, Dak* D"/* Aijut X, 1946 Reference Subject U.S. CTP5UV KPa* Canadian Paint 131 1B2 * pag* t fan* tha alnrxy. ft# alorry la apparently thinner tbaa aura. Zt is filial dlractly Sato aauld* aa track*. It laral* Itaalf la tha aaU and tkm la ao azoaaa to aarapa off* 100# ataaa pruiara la aaad la aatoclaving. Tha aoald* ara reported ta Uta a 1/S" kola la tha bottoa (alorry doaa aot inla through thla). To faallltata aaaoald* lag air pxwteur* froa a hoaa la appllai to thla nail apaalag. Thla broaka tha ametlea Bataan product and mould. Tha aoalda art aada fra light weight ataal (ap to tha praaaat bloeka only ara aada). filling tha mould* directly aa truck* ao ioabt oaTaa tbaa a lot af labor and aaabla* tbaa ta eueoaaafullr aa* a very hat olurry. bat Z doubt whether tbl* la practical alth oar hoarier elurry which require* aeraplag tha top level with azeas* overflowing Into a return conveyer. CPv.aa 01-0213909 GAF 22733