Document MJywN4gweQoEaoYJaGvGe6DdV

VlOLOOQlO CLEVELAND C-12 Tab!- I Pigment Vehicle ' Biyr.ient Titanium Calcium Titanium Magnesium Zinc 0:dde 350 Leaded Zinc Lithopone Basic Carbonate \1. Lead magnesium Silicate Barinm Sulphate Vehicle Linseed Oil Soya Oil Kent Treated Linseed Mineral Spirits Drier Total Ti02 Gray Paints - Analysis Pittsburgh Slate Gray-3 6 54.70 45-30 00100. s-w ,"477 Westchester Gray 61.051 39-00 100.00 Glidden Y-1860 62*30 37.70 100.00 34.20 23.7J1 30.00 12.151 100.051 37.00 45.00 3.00 10.00 100. orS 52.80 21.10 20.60 -irgi 100.00 51.5SS 17.Z5S 26.551 4.80 100.051 17.375s 40.00 27.00 18.00 j-5.00 100.00 11.10 47.50 26.00 19.00 ..l -4 100. o& Table II Color: Glidden Y-1860 Med. Gray Wt./gals 15.5 Body: Storner: 82 I0J ="4 Cup: 85 sec. Leveling: Fair-go 0 d-1ypical house naint. Gloss F-good-tynical 'umse nt. gloss. C-rind: 2-3 Drying: Overnight. Good thru dry. Properties Pittsburgh 1-36 Slate Gray Siniler, bluer. 12.8 S.V7. Weot- / DuPoni ;fl6o Chester Gray 477 Scotch Gray Much lighter. Lighter, liire S.W. 13.5 14.0 93 ZB 290 sec. 76 KU 7? sec. Good Fair-go od-lihe Y-1S60. F-G. Similar to Slightly less Y-1860. than Y-1360. 43 Slight overnight taels Overnight. Good Appears to surface thru dry. toy. 93 KU Too puffy to run. Poor Like S.Vf. 0 Trace overnight tach. Tendency to surface dry. j|l DuPont paint full of soap particles. ilm is rou.gh or granular. nj 4-24-52 H. G. Hayward GLD007015 ] 1 I I 9XOi-00Q1 J J V NUBIAN Product Development Report March 1952________ I. Catalyzed Epoxy Coatings 1) Caterpillar Tractor Company 2) General Research 3) Argonne National Laboratory U) Atomic Energy Commission II. Polyesters 1) General Research 2) Hotpoint, Inc. 3) Western Electric Company Ill.Plastisols 1) Altorfer Brothers Co. 2) Electrical Engineers Equipment Co. 3) Simmons Co. It) Western Electric Co. I. Catalyzed Epoxy Resins 1. Caterpillar Tractor Company The above company submitted specifications for a buff primer and a yellow enamel, both air dry finishes. The specifications were issued 3-27-50, and the specification numbers are I-B-378 and l-E-379 for the enamel and primer respectively. Four primers and one enamel are being considered. The primer systems are as follows: Pigment/ Pigments Vehicles Vehicle Red Lead Lead Free Zinc Oxide Mica Hicronized A-3000 Titanium Oxide Treated Anatase Red Lead Zinc Chromate Jlica hicronized A-3000 Titanium Oxide Rutile Type 61.5# 15 .1*# IS.IS 1.1% 18.5# 22.2# ll*.8# 1*1* .5# Epon RN--3l* VAGH Vinyl Epon RN-3I* V4GH Vinyl 82.6# 17.1*# 83.2# 16.8# 2.38 2.38 Red Lead Zinc Chromate Mica Hicronized A-3000 Titanium OxWe Rutile Type 21* .1# 20.7# 13.8# ia.i*# Epon 1001 100# 2.07 Red Lead Zinc Chromate Mica Hicronized A-3000 Titanium Oxide Rutile Type 21*.1# 20.7# 13.8# 1*1.1*# Epon 1061* 100# 1.77 -16- cu> 7oV' > The topcoat is a 80% RN-3U and 20% phenolic system. Studies still in progress seem to indicate that better adhesion, film toughness and flexibility can be obtained by replacing' part of the Epon RN-3U with a higher molecular weight Epon. The final formulation for the yellow enamel is dependent on the outcome of tests in which 20% of the R/J-3lj Epon in a 70% Epon R.T-3U 30% phenolic system was replaced by Epons 1001, lOOli, 1007 and 1009. Both the primers and enamel are air dry finishes and are catalyzed with ethylene diamine. The test contemplated will be conducted on l/8" Metal Prep steel covered with one coat of primer and one topcoat. The test schedules are given below. ll 1000 hour salt spray 2) 1000 hour humidity 3) Weatherometer U) Immersion in distilled water 5) Immersion in oil 6) Flexibility before and after ageing. Both the primers and topcoat have shortcomings regarding some parts of the Caterpillar Tractor Company's specifications, namely, rate of drying to tack-free condition. However, the chances of meeting most of the require ments appear to be very good. 2. General Research A. Another device to apply catalyzed epoxy finishes in one operation eliminating the manual addition of the catalyst, was tried and found to be promising. The system was devised by Binks and essentially consists of two piston type pumps whose outlet ends are connected together while the inlet sides are separate. With this apparatus it was possible to combine the catalyst and epoxy enamel in the proper ratio and spray a coating on steel that on baking gave a film that was in all respects comparable to that obtained by mixing the catalyst and the enamel manually. Binks are now working on a similar model that can be used in the laboratory and also in the customer's plant for experimental purposes. B. Various systems of Epon resins with and without VAGH vinyl were tried as primers with red lead pigment and rai lead-zinc chromate pigment combinations. Only Epon RH-3U could be used with VAGH vinyls. Higher molecular Epons showed incorpatability. Primers from the latter systems increased in viscosity gradually indicating a gelling or kicking-out of the vinyl. Both red lead and red lead zinc chromate with the Epon RN-3U-VAGH vinyl system gave very good primers. These primers when catalyzed with ethylene diamine for air drying possessed the following characteristics. l) Very good spraying qualities 2) Very good flow, films were free of craters 3) Good adhesion It) Medium toughness 5) Good flexibility 6) Fast initial dry ' -17- ,, 0oTV GV- t* A series of tests will be conducted on these catalysed air dried primer systems applied on sand-blasted steel panels concurrently with an alkyd type air dry schedule and a wash-coat VAGH vinyl system as controls. 3. Argonne National Laboratory A black air dry enamel, 517-13-A, with a 70% Epon RN-3U and 30% phenolic system was prepared for coating masonite panels. On catalyzing with 6-1/2 1. oz. of 1W.V-2 569/gallon of the enamel and air drying, an alcohol resistant film possessing very good flow and excellent gloss was obtained. Eif'ht 12" x 12" x 1/8" Masonite panels were finished with this air dry enamel catalyzed as described above. Four of the panels were given a prime coat of SZ-U669-C, a Masonite type primer, and one coat of the cata lyzed enamel. The other four Masonite panels were covered with two coats of the catalyzed enamel. The first coats in each instance were sanded lightly. These panels were submitted to Technical Service for evaluation. A. M. Laurinaitis In Atomic Energy Commission Considerable time has been spent in developing catalyzed epoxy type coatings to withstand medium concentrations of mineral acids, alkali and ketone solvents. This program of development is closely related to the same tvpe of coating that Browne-Korse Company, manufacturers of labora tory furniture, has specified for use on their end products. Initial evaluation of an fN--3U Epon coating modified with small concentrations of Vinylite resin revealed that its resistance to 3N nitric, sulfuric, hydrochloric acids, 3N sodium hydroxide and methyl isobutyl ketone was entirely satisfactory. The Atomic Energy laboratories have confirmed our findings but expressed their desire to test this same type coating for "decontamination" properties. The Technical Service Department has decided to submit a series of catalyzed Epon finishes, both baked and air dry, coated on sand-blasted steel rods and solvent degreased panels to the AEG for a complete evalua tion. Eleven rods and ten panels were coated with the following schedules. All rods received three dip applications} the panels received one to two coats by spray application. -10- GLD00?o 19