Document 3gze0o1O9XoKZK7m364Dr0B6

Mr. 1. Mart - South lotad hook Bovssber 9, 1951 Itown. TaoAkio - Ugh - Gordon - Diatbir - hbliioB ejkuzuxi A bsearch pbojbct - txvxLoncm or ucimrzosr caisxuti romou 176 - UBOXAIOBX KPORT V-Sl X but to mtlpi tf pour latter of Soraaber 8, vhleh umn the nrlov* points nlMd in aj prior letter to pen doted the 7th* Vhan Mr. Qordon finds tine, Z should torp aueh like to hors kla glT consideration to Canadian Potest Bo. 476,897 leaned ItpVeibtr 11, 19$1 to B. Loves aad G. P. Leehieh, referred to is p letter to pen doted October 4. This potest, pen will note, severs tvo Interesting featured 1. tbs ess of sa saeeelerator" la a ealeio-sllleate tppe of lmsolotlaa (preferably eodiua-hrdroxide) vhleh Is elslaed to result la *prosettla8s sad cutting dova the suteelavlag tlao. 2. 1 derlee for pxeperlp oilgains the asbestos fibres re ferred to la tbe potest as eteaa-beeted fingers*. X shall accordingly avolt pour further observations vith sonsldsrabls Interest. IllG. President 01-0213950 GAF 22774 The RUBEROID Co. SOUTH BOUND BROOK. N.J. H.in:v us: For Attention Mr. B Abraham, Prss. - New lork Deu November 13, 1951 Copy to Messrs. Van Akin, High, Gordon, Denaher, Robinson Reference Tour letters Otft-. 1* and Nor. 9 Subject CA1SIUTE #1 RE5EARCH FROJXCT - DEVEZOMCNT OF LICBTSBIOHT CAISILITE roraoru - Canadian patent i*76,89? Canadian Patent 1*76,897, September 11, 1951, assigned to Pebco, is the same as a. S. Patent 2,1*83,1*96 of October 191;9. In answer to the quaatlans brought up in jour letter of October U. Is use nncalcined diatoaaeeous earth In all our Calsillte farmulatlons as well as dry lime hydrate and asbestos fiber. Sodium bgrdrox ide is used as an accelerator for forsulss 171* and 176 which are low density formulations. Steam heated fingers cannot be successfully used in our present type of molds* Vertical molds are necessary for this purpose* Our best formula tico to date for preset slurry is b^H-9 in which sodium silicate is also used as an accelerator. This formulation can be preset in either horiseetal or vertical molds* This la the formula we plan to experiment with first in Mr. Van Akin's proposed continuous preset molding process. Our present standard slurry U9B-FC cannot be preset by aqy swans of beating to 212F. In the rabco process the steam heated fingers no doubt are of an advantage both in presetting the formulation and also in aligning the fibers. This type of device is not practical for our present molds* CKStalk C. R. ECKERT 01-0213951 GAF 22775