Document GmLkwYq5dYg1E0dDrMgL6D72q

Ml TO MARSHALL ^ 'v INDEXElf HIy 6 *54 . - MEEQMilDIlH 'REPORT 10. 1-701 Prepared bjt J. P. Semattsi lot Indexed eei D, J, ieBurney, 11. B--7012H. 1. Thomas, llewburga ' 8,,.A. Rodman, lewfeurjgh JV B. Fie8n$, .Flint C, Jalbx Paulin i, B. Davis, Lab. B tegan; Mb, P, Robinson, Lab, P, B, Evans, Mb. W. 1)-. Lawson, Lab. J. H. Lowell,' Mb. 8. Rochberg> Mb. W, A* Mail, Mb, . 0. U* Bullitt, Jr., Ixp. Sfca, ffarebaXX Lab. Library (5) Marshall Laboratory May 3, 1934 ' VXSIft TO -QMS3RLLX CHEfUCALS IffiPAftaMEWT- IKMOTCTIQI: On April 14, m visited the 0rasselH Research Laboratory at the Experimental Station to discuss new materials of potential interest to w & F, Persons interviewed were.: , J. .lighten, 0. B. ..Alexander, and Ralph Aarons, SBliARY: . Grasselli has a few new materials' of interest* Sffeese include: (,l) A modified "Mdox** in which the average particle size of the silica micelle is 7 millimicrons instead of 17 millimicrons for the standard^Ludox" A pint sample is being obtained. {2} 1,Qruiin% stsarato'elsromiAo chloride, can be used to treat extenders -and pigments to impart water resistance and better organic dispersibility properties, raeselli Is treating a pound sample of chromium tetrahydroxide for the FarlM t a H Group. 0. I&lfe at Farlin will feeep us advised of the results.of this work. We have also ns&ed rasselli to treat some aluminum powder with Sullen'1' to determine what effect this Ms on the leafing or non-Isa?^ tag .characteristics. N35494 (3) Grappelli had a flake allies sol, which comprises a 25$$ solids dispersion in miter of silica In plat or- leaflet fox'.. On spreading this material on glass and heating to evaporate the water* a hard, coherent silica, fils is forced. A small sample is being obtained._ : (4) Orasselli's Work on a water*dispe?sihle, f.&i~fring* fibrous .shaped polymeric alumina has not yet reached the stage where samples are available, However, a technical bulletin is under preparation at present and small samples are expected to-be ready for distribution within a few months, fe will obtain samples sm& ' technical information at that time. Ms (1) J. P, Seraattei will examine the flake silica sol as ..an inorganic, film-forming material. (2) (3f. ?. Hell will evaluate the 7 millimicron particle sis "badcot" in "Teflon" (Tetrafluoroethylen resin} wire.enamels,< (3) J. P. Sermattei will evaluate the "Quilon" treated aluminum powder* if Grasselll is successful in treating this material, DISGU3S1Q1; Modified"hudoses" Grasselli has a program underway aimed at making a series of "hudoxes" varying in average particle .else from 7. to 70 milli microns. Other modifications'are also in preparation, in which pro panol is used to esterify the silica* resulting in a product -which is dispersible in propanol* and compatible with, other organic solvents. These modified silicas will also be available in the form of dried down*powders consisting of essentially spherical particles of very small particle size. It is expected that these powders will b of interest as reinforcing fillers for plastics and elastomers. However., samples are not yet available. "Gullon" Treated Extenders ..and Pigments GrasseHi claim that their steara tochromic chloride {"Guiles") can be used, to coat pigment particles, resulting In fifem combinations that have improved water resistance and better dispersibility in or ganic solvents.. They estimated the cost of the treatment -at about 5$ per pound treated pigment* Since the chromium complex have a green color, .this treatment cannot be applied to white or lightcolored pigments, hr to extenders when color is important. We plan to follow the work that Purlin Process and methods Group are doing with a HQ,uilon"'-traibed chromium tetr&hydroxlde -pigment* We are also supplying Gxsasalll with samples of aluminum powder that they have agreed to treat with "Quiltm", for us. jfSa-yo 4/29/54 ff fj3,, p. mgmmm. (J DUP030003695