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Z1 DCs R*. 3* DaVisLab*.' ft. -issrgan* Lab. RETUR8 ID NIIBSHULL UBflRATORY LIBRARY R; I . ttaias, Ifeitjisrgh 1* I * Rodman, jfewburgb ? B* 'Evans5 lab. ; INDEXED Ji 29*54 $> Rofetason, Lab. . J. H. ImU$ Lab*. .. f H, Johnson, .Lab* 3* A# ifeorehesd* Lab 2>. L* Eeradoa, Lab- 4, 0. Bask* .lab. H. O. Stauffer# Lab. w* D. Lawson, Lab. K c*' Lsispert# Xab* E. L. Selby, Lab. Library (5)> Lain Patent S@oM.on, Lab. File* 183.0 Harebell Laboratory July 19# 195^ MEMgBABPRB HW HO. TIT EBSPAMBD Bis H. S. 3AS%L&Cg "BUTCH BOY" mWSQMS & FMSflCEEES visxg gar mmmt mm comm mwmmwm'mm On July 12# Msears. H. B. Smith and A. L. Soarteough of the lationt1 Load Company visited the Marshall Laboratory and discussed their Benton products and plastiei&ers with . T. M. Johnson and the writer.. fhra Bentone products are in eomBsreial production? Beaton 18-0# Benton 3*b and Ben-0SeX (pmvimslY tern as $h@ bentonite used in the manufacture of Bentones is carefully selected for spality {ehemioal composition) and is treated to b tain tbs primary mineral iMntmor&XIonits in a high degree of purity, fh Benton derivatives prepared from the latter a* claimed to be iiigbly ^producible and very mnlfoiai in composition,.. X-ray data shows'tho Seaton to aaasist of - layers (2 molecule thick) of organic ammonium cations sandwiched .between platelets of momtmorlllQnibe. Solvation -.on. the amine chains .causes the structure to swell and expand somewhat like m acordlon., t form a gel. Ex cessive dispersion or too much polar solvent will de-gel -the system. N35499 Benton .gels as? not markedly affected lay temperature so that good application properties and storage characteristics are retained over a considerable rang. They will function satis factorily within .a pi range of about 4 to 10,. Solvent release (drying time) is not retarded by Benton gels, nor is adhesion adversely affected. The gel structure is .retained' after the film dries. There is experimental evidence that Benton 3^ acts as a film reinforcing agent in that a small amount greatly improves the check resistance of Pliolit fils on outdoor exposure. It is also claimed to improve the water and chemical resistance of most'films. Benton 18-0 has recently been developed as an improvement over their'Bentbne 18. It is an 18-carbon atom Blum salt of faontmorillbnite. It will thicken and gel solvent .mixtures which include both polar and non-polar solvents, and is woownended particularly for use with lacquers. If is priced at 45^/lb. as compared with 6<$/lb. for Benton 3^. A brochure describing the product and suggested applications is being sent to us. W. T, H. Johnson is obtaining some Bentone 18-C for evaluation. Benton 34 (the dithyldioctadecyl ammonium salt of mont- morilTohite)1"gives better gel structures with nou-polar solvents and is being used to various extents by about 800 paint manu facturers. The advantages claimed include improved application properties (brushebillty, sag-resistance, and prevention of flood ing) and better storage stability (prevention of pigment caking). Benton has only a slight flatting effect, and within limits can be used in enamels without appreciably lowering the gloss. * Full details on the us of Benton 3^ in various types of finishes and related products are included in a brochure of' which we. have copies. Ben-0-del is a completely inorganic derivative of bentonite. We havShad samples under its previous designation "Thix". It forms gels in aqueous systems only. If, is said to improve the scrubbaMllty of latex paints. Both the "oil" phase and the water phase of an emulsion paint can be gel-controlled by using Bentone and Ben-O-Gel in a single product.. ,, Plasticizers, Following rather extensive exposure studies (mosfly wifH resins) the National head Company has recently brought out four new plasticisers. They also produce four standard plasticiserss dioctyl phtfaalate (d o ?),' dli&ooctyl phthalate (DIOP), dioetyl sehaeeate (DOS) and dibutyl phthalate (DBF). They make no claims for these in comparison with competition, except that they are high quality products. .Hewburgh lias had samples and information on the four new plasticizers which were described $s follows* A-54 is the phthalate ester of a primary alcohol. It is said to be very close to DOF in properties but s$/lb. cheaper. It DUP030003716 is about tine same as POP in light and heat stability, but is slightly more volatile* and slightly inferior in loss? temperature flexibility, F~21* F-31. and F-4l* were described as plasticisers which hoabloFtBe low volatility of polymeric plasticisers with the low temperature flexibility of monomeric plasticizer. Xt was initimated that they might be dimers or trimers of dibasic acid esters. (Further information will be released when their patent position has been established.) F-21; Volatility; comparable with Paraflex QH50. Low temperature flexibility; better than BOP. Pric; 395^/lb. delivered in tanks. ff-31: Volatility and low temperature flexibility; eoBarable"wrSh dioctyl adipate. Price 46$/lb. F4l; Similar to F-31 but better in light sad heat stability.""Tlueh better than pop.) Price k9$/lh. Samplejs of these new plasticizers are being sent to W. T. M. Johnson for evaluation. A brochure on each is also being obtained. HEE;AtSB 7-19-54 H. E. .EASELACK DUP030003717