Document wqoZ8km9wb6XY59e6d27qOz14

PRODUCT DEVELOPMENT REPORT PMWF, VARNISH St UCQUER LABORATORIES THE GLTDDEN COMPANY - SEPTEMBER 19^3 i 0V-C TEST FENCE INSPECTION Trip report on Test Fence Inspection at National Lead Co. and Titanium Pigmentsr* Sayville, Long Island* N. Y* 10/13/53 Mr. Hamer* 14r* Heckman and I visited the National Lead and Tit&niton Pigments Test Fences at Sayville, Long Island, N. Y* on L0/I3/S5* The National Lead Fence were inspected first* 1) Single Pigment Paints a) Oil base paints were shown of Lead Carbonate* Lead Sulfate, Zinc 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 sine 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 is a basicity test and compares lead carbonate, lead sulfate at two PbO levels and l$C lead silicate* b) All applied three coats over yellow pine, white pine, cedar and cypress and exposed ll/l3/5>Ge e) 1455c shows poor clean-up due they claim to photosensitivity. Lead car bonate shows characteristic checking which Is also shown with Lead sulfate shows poorest wood holding properties* d) They claim test shows increased durability and adhesion as the basicity of the pigment increases. 3) Low Zinc Oxide paints with Varying Amounts of Carbonate^ Sulfate or liSfo. a) This test was made primarily to see how low the aino oxide content could be and still obtain a white which would show proper cleanup* b) 1% Sine Oxide is the low limit for cleanup. Lower percentages show cleanup will not take place for at least one to two years, depending upon location (See National Lead book for formulas) e) Mildew is evidenced on those panels containing less than 10$ Zino Oxide regardless of the lead pigment present. d) Hat of chalking increases from lead carbonate to lead sulfate to bSis CLD006972 a) These teats show & comparison of the Federal Specification TT-P-25, lead oarbonate and h$X. replacing lead carbonate on a volume basis* b) l$C replaces lead carbonate at a deoided savings (they figure 3# l$C replacing $$ carbonate at a difference of 35^) c) Wood holding properties show hSfr equal to lead carbonate and better than T2VP-25 on the south exposures and better than either of the other primers on the north exposures* d) They claim some 800 paint companies are using i$X* These include Sherwin-Williams, Devoe, Sears, Montgomery-Ward, Pratt & Lambert and Benjamin Moore* e) It appears as though bx oouldbe used advantageously in an exterior house paint primer formulation. This is further borne out in the next series* $) Additional k$X. Primer Tests a) These tests enlarge those shown above* They include the National Lead KW ijDl and a similar formula replacing lead carbonate with UX* b) All primers are used under three different topcoats on both white and yellow pine* Exposed July $9 191#* a) Tnse tests again demonstrate better woodholding properties for U5&* 6) House Paints a) This series: includes tests on whites and gray tint paints# b) Starting with a typical carbonate, leaded zinc, titanium asbestine paint the sulfate in the leaded Zinc is replaced with U*SX and the Zinc Oxide as Acicular grade. In the second replacement a pound of Zinc Oxide is also replaced with In the third replacement all of the lead iir the formula is replaced with also one pound of rf.no oxide. The titanium s increased to bring it up to equal hiding, o) These replacements are made on two white formulations and three gray formulations* d) In order to show the cracking tendencies of Zinc Oxide and its counter' action by these tests were run. In other words they claim 1#X reduces the reactivity of the Zino Oxide and prevents the cracking failuresa a) In the grays it was shown in addition to the above that a minimum of 2 l/2# of rfnc oxide is necessary to prevent mildew# Using 2 of aim oxide, mildewing started at the end of three years. (This work hecks the tests at Du Pont on Zino Oxide in that they believe at least 2 l/2# should be present in tints and deeper shades)# GLD006973 t j j j ~3 - 7) Additional House Paints a) This series is similar to the above in that stepwise replacements are made for sulfatej sulfate and Sine oxide} sulfate, carbonate and zinc oxide. b) It again shows the effect of too high a Zinc Oxide content causing cracking* * o) Also that cracking may be encountered if the USt is increased too high* d) The effect of high inert as shown in Group 111 of this series, 3$% Leaded Zinc/l5 Anatase Titanium/35^ Asbestine, is to produce mildew on the north exposureso 8) U5C House Paints Staining Teats a) These panels were three coats self-primed* The Zinc Oxide in the base formula was decreased in half pound unite0 The lead sulfate portion of the leaded zinc was replaced stepwiBe with U5& on a volume basis. b) Panels had regular iron nails driven into them to show staining* o) In this series iron-staining was reduced as the zinc oxide content is also reduced. On the north exposures, mildew increases as the zinc oxide is reduced. d) There is apparently an optimum point between 2 and 2*6# Zinc 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 3ess degree fromthe 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 ------ i i LI wmmmm muf 9 mrnm a) Lorite is a calcium carbonate ()-diatomaceous silica (1$%) inert. It was compared to asbestine on a volume basis in the typical camouflage colors. These paints were s imilar 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* GUDO0b^7A T- t .J a NUBIAK u 11) Dyphos and Bentone Paints a) Dyphos is bibaeic 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 PJiolite and Parlon stucco white formulations, c) Based upon these tests, Dyphos improves color-retention in Pliolite and Parlon* It also r etards 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 1/2 combination cf 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* e) They have run a number of tests on safflower oil and find it very satisfactory from a durability standpoint in house paint formulations.