Document wqoK12y62mmLzeEbqMZMZ67L6

TEST FENCE INSPECTION Trip report on Test Fence Inspection at National Lead Co. and Titanium PigmentSr, Sayville, Long Island, N. Y. IO/13/& Hr0 Harner, Mr. Heckman and I visited the National Lead and Titanium Pigments Test Fences at Sayville, Long Island, N. Y. on 10/l3/3 The National Lead Fenceo were inspected first. 1) Single Pigment Paints,, a) Oil base paints were shown of Lead Carbonate, Lead Sulfate, Zino Oxide, Asbestine, Anatase Titanium and Zinc Sulfide? b) All applied three coats over cedar and exposed yearly since June 26, 1950* c) These show wood holding properties and mildewing, d) The white lead carbonate panels look best for wood holding. The lead sulfate is much poorer? The tine pigments show typical cracking ten dencies. The anatase titanium typical erosion. The asbestine while good for durability shows mildew collection. 2) Lead Pigments a) This ia a basicity test and compares lead carbonate, lead sulfate at two PbO levels and 1$C lead silicate. b) All applied three coats over yellow pine, white pine, cedar and cypress and exposed ll/l3/50e o) shows poor clean-up due they claim to photosensitivity. Lead car bonate shows characteristic checking which is also shown with hX Lead Bulfate shows poorest wood holding properties. d) They claim test shows increased durability and adhesion as the basicity of the pigment increases, 3) Low Zino Oxide Paint3 with Varying Amounts of Carbonate, Sulfate or hSC. &) This test was made primarily to see how low the eino oxide content could be and still obtain a white which would show proper cleanup b) Zino Oxide Is the low limit for cleanup. Lower percentages show cleanup will not take place for at least one to two years, depending upon location (See National Lead book for formulas) c) Mildew is evidenced on those panels containing less than 10$ Zino Oxide regardless of the lead pigment present. d) Rate of chalking Increases from lead carbonate to lead sulfate to U5& CLD 00697 2 -2- U) Primer Tests U5% Lead Silicate a) These teats show a comparison of the Federal Specification TT-P-25, lead carbonate and U5X replacing lead carbonate on a volume basis* b) liiSt replaces lead carbonate at a decided savings (they figure 3# USX replacing $ff carbonate at a difference of 35t) c) Wood holding properties chow Li5tX equal to lead carbonate and better than TT--P--25 on the south exposures and betterthan either of the other primers on the north exposures* d) They claim some 800 paint companies are using Li5x These include Sherwin-Williams, Devoe, Sears, Montgomery-Ward, Pratt &. Lambert and Benjamin Moore0 e) It appears asthough li$X oould be used advantageously in an exterior house paint primer formulation* This is further borne out in the next series* 5) Additional UgX Primer Tests a) These tests enlarge those shown above* They include the National Lead JW bOl and a similar formula replacing lead carbonate with U5&* b) All primers are used under three different topcoats on both white and yellow pine* Exposed July 5, 19b9* ij ) Tese tests again demonstrate better woodholding properties for 6) USX House Paints a) This series includes teots on whites and gray tint paints* b) Starting with a typical carbonate, leaded zinc, titanium asbestine paint the sulfate in the loaded Zinc is replaced with USJ. and the Zinc Oxide as Acicular grade. In the second replacement a pound of Zinc Oxide is also replaced with In the third replacement all cf the lead iir the formula is replaced with U5X, also one pound of zinc oxide. The titanium s increased to bring it up to equal hiding, o) These replacements are made on two white formulations and three gray formulations* d) In order to show the cracking tendencies of Zinc Oxide and its counter' aotion by U5!x these tests were run. In other words they claim USX reduces the reactivity of the Zinc Oxide and prevents the cracking failures* e) In the grays it was shown in addition to the above that a mirJLaujtn of 2 l/2# of zinc oxide is necessary to prevent mildew. Using 2# of zinc oxide, mildewing started at the end of three years. (This work checks the tests at Du Pont on Zinc Oxide in that they believe at least 2 l/j# should be present in tints and deeper shades)* GLD006973 -3- 7) Additional \SX House Paints a) This series is similar to the above in that stepwise replacements are made for sulfatej eulfate and Bine oxidej sulfate, carbonate and zino oxide. b) It again shows the effect of too high a Zinc Oxide content causing cracking. o) Also that cracking may be encountered if the USX is increased too high, d) The effeot of high inert as shown in Group 111 of this series, 3$% Leaded Zinc/l5^ Anatase Titaniun/3% Asbestine, is to produoe mildew on the north exposures0 8) House Paints - Staining Teats a) These panels were three coats self-primedi The Zinc Oxide in the base formula was decreased in half pound units0 The lead sulfate portion of the leaded zino was replaced stepwise with on a volume basis. b) Panels had regular iron nails driven into them to show staining# o) In this series iron-efcaining was reduced as the zinc oxide content is also reduced. On the north exposures, mildew increases as the zino oxide is reduced, d) There is apparently an optimum point between 2 and 206# Zino Oxide for this particular formula. 9) Commercial paints - Staining Tests a) This test includes the paints in the above aeries plus a number of others added. Both regular iron nails and copper screening were affixed to the finished panels. b) All of the competitive paints show staining to a greater or tes degree from the iron. Most of the materials were resistant to copper staining with the exception of the lithopone type (Formula K was in this test.) Dutch Boy #210 Sash and Trim White did not show any staining. This is a long oil alkyd type. 10) Lorite in Camouflage Enamels a) Lorite is a calcium carbonate (8^)~diatomaceous silica (ljjjg) inert. It was compared to asbestine on a volume basis in the typical camouflage colors. These paints were similar to those originally made during the war on a low oil basis. b) In every istance the replacement for asbestine using Lorite shows much improved color-retention. GLDOOb'*7* NUBIAN 11 R n ) 11) Dyphos and Bentone Paints -k- a) Dyphos is bibasic lead phosphite, It is claimed to be an ultra violet light screening agent and are acid acceptor, b) These tests show the additions of Dyphos and Bentone, separately to the Pliolite and Parlon stucco white formulations, c) Based upon these tests, Dyphos improves color-retention in Pliolite and Parlon, It also retards checking, Bentone apparently retards checking also in these formulations, 12) Safflower Oil a) These tests show a comparison of raw linseed oil versus a 1/2 and l/2 combination of raw linseed and non-break safflower oil in White Lead Paint and a ready mixed paint, b) Durability after 3 years' exposure is fully comparable g ) They have run a number of tests on safflower oil and find it very satisfactory from a durability standpoint in house paint formulations. g<-0006 975