Document VGygOKXNX5oanDR55wJLYJQGZ

s^S. '1*. Powell Strongsville, Ohio LRAD REMOVAL Last few formulas December 22, 1972 Hr. W. D. Kineell UCB ocj Mr, E B* Ewchner Dr, H. J. Kiefer, DCB Mr. R. J. Haviland,#l Mr, W. M, Tome Mr. J. E. Southvick Von have asked us to remove all the lead from our formulas by January 1973, ono year in advance of legal national requirements* We have been able to achieve this in most formulas, at a cost increase for some and a hiding loss for others, but there are a few for which we need additional testing time. These are the oil house paints - certain formulas in the Endurance, Craftsman and Ultra-Hide lines, bast year these 6 paints accounted for 845,000 gallons of production. Lead drier promotes thru dry anda more flexible filn in these products, and the best replacement for lead, a mixture of cobalt and zirconium, gives very slow drying films when veed at * safe level, and brittle films when nt a level that gives equivalent dry to lead.-, Several series of exposure panels produced since 3.956 have shown this embrittlement with .lend replaced with cobalt at levels sufficient to give adequate dry. We still have hopes of being able to work out a satisfactory lead-free drier system because our vehicles today should be inherently more flexible than they were then, and we are using lesser quantitieti of zinc oxide, a pigment that contributes to embrittlement as a by-product of its other valuable contributions. We can see no quick ant.war in oxxx analyses of competitor's action. S-W han adopted a lew leva? of .91% cobalt on vehicle soldis, and their paints are very poor In drying. They are approximately 2 hours slower than Endurance under lab conditions, and much slower nt a temperature of 50F and 70% R, H. The S-W paint dries f:o a tender skin which remains vet underneath for hours after a land-containing formula has dried thru satisfactorily. It has been this ability of lead driers to provide satisfactory dry under adverse conditions of cold and high humidity that has made them no necessary. We can produce formulas suitable for Chicago nt ,03% cobalt which will give us acceptable dry at 70 and dry only 3 hours slower than our GLD007128 Mr. W. P. Kinsell . December 22, 1972 load-containing formulas nt 50* end 7056 R, R. This its lens than the level that noire drier manufacturers have recommended, and while these paints might bo somewhat more brittle than our lead-containing fomulas, they should not be a total disaster. We would like to defer going lend-free on a Rational basin for these particular palnte until at least next Tune, after additional testing whether higher levels of cobalt drier will not cause premature cracking and flaking with today'3 vehicles, and would foe ablo to produce paints with adequate dry. With the decision by the Rouse Committee to change the lead limitation from .0656 to .596 we are hopeful that this will clear both House and Senate and permit us to stay at .556 lead, which will give us positive dry under cold damp conditions and the best durability regarding cracking and embrittlement. We propose to issue lead-free formulas for Chicago, but those :"or the rest of the country still containing lead until wo can resolve our problem. May wo have your approval for this action? STBted 0. T. Powell GLD007129 lr.`\ S, T. Bowel! Strongsville, Ohio LS5E> mmhls Last few formulas December 22, 1972 Mr, W. D. Kincell UCB ce* Mr. B B. Buchner Dr. B. J, Kiefer, UCB Mr. R. J. Havilnnd,#l Mr. W. M. Tome Mr. J. E. Bonthwick You have asked us to remove all the lend from our formulas by January 1972, one year in advance of legal national requirements. We have been able to achieve this in most formulas, at a cost increase for some and a hiding loss for others, but there nro a few for which we need additional testing time. These are the oil house paints - certain formulas in the Endurance, Craftsman and Ultra-Hide lines, bast year these 6 paints accounted for 945,000 gallons of production, bead drier promoter thru dry anda more flexible film in these products, and the best replacement for lead, . a mixture of cobalt and rlrconium, gives very slow drying films when used at a safe level, and brittle films when nt a level that gives equivalent dry to load., Several series of exposure panels produced since 1956 have shorn this embrittlement with lead replaced with cobalt nt levels sufficient to give adequate dry. We still have hopes of being able to work out a satisfactory lead-free drier system because our vehicles today should be inherently more flexible than they were then, and we are using lesser quantities*; of zinc oxide, a pigment that contributes to embrittlementae a by-product of its other valuable contributions. We can see no quick answer in our analyses of competitor's action. S-W has adopted a low level of .01% cobalt on vehicle sold.is, and their paints are very poor in drying. They are approximately 2 hours slower than Endurance under lab conditions, and much slower at n temperature of 50P and 70% R. H. Tb<* c-W paint dries to a tender skin which remains wet underneath for hours after a load-containing formula has dried thru satisfactorily. It has been this ability of lend driers to provide satisfactory dry under adverse conditions of cold and high humidity that has made them so necessary. We can produce formulas suitable for Chicago nt ,03% cobalt which will give us acceptable dry nt 70 and dry only 3 hours slower than ov.r GL0007131 ~.J *r. W. D. KinBell December 22, 1972 lead-containing formulae at 50* and 70% R. H. This is leas then tlie level that none drier manufacturer* have recommended, end while these paintn might toe somewhat more brittle than our lead^containlng forrmlas, they should not bo a total disaster. We would like to defer going load-free on a National banin for these particular paints until nt leant no>:t June, after additional tenting whether higher level* of cobalt drier will not cause prematura cracking end flaking with today's vehiclea, and would be ablo to produce paints with adequate dry. With the decision by tbs flowaa Ceroiiftee to change the lead limitation from .06% to .5% we ere hopeful that this will dear both Howee and Senate and permit us to stay at .5% lead, which will give ns positive dry under cold damp conditions and the best durability regarding cracking and embrittlement. We propose to issue lead-free formulas for Chicago, but those for the rest of the country still containing lead until wn can reeolve ear problem. May wo have your approval for this action? J BTBted N. T. Powell GLD007132