Document EkxppZ4XM2oD5qn6JN99Ja0b

June 2, 1972 FROM: CITY: F. G. Hidalgo Strongsville FOR: Mr. Wm. Tome, D.P.J. SUBJECT: ItEPLACKAEliT OF LEAD C0I1TAJJUIIG PIGMENTS MID DRIERS The following inform:Lion is being r.eit to assist you in the replacement of lead containing pigments and lead criers in those formulas which you will need to. reformulate to a lead-free basis. Repl acement of Laad_ Priors Considerable v.'ork has been done by the Trade Sailer Laboratory at the Research Center in arriving at the beet drier combinations to replace lead in the various Qualities that v/o manufacture. Primarily, the re placement is based on addition of zirconium with n slight increase in the cobalt drier that war; previously {resent in the formula. Where both lead and manganese were used, they have both been replaced by zirconium, since the lab found better results that, way than if the man ganese vras left in. Where L- 396 Lead Feeder Drier has beer used to prevent loss of dry in the package, the addition of calcium crier in the grind has been found useful since calcium appears to be absorbed preferentially over the remaining drier metals. I am sure you hove scon rccomiaendatioi s from various drier manufacturers in which different percentages of zirconium, cobalt and calcium are quoted as suggested replacements for lead. 5nee a great deal depends on the particular vehicle system employed, 1 have summarized in Table I the old and new drier combination of different types of trade products so that, by referring to this table, you may arrive at better star-ting points for your own air-drying regional formulations which largely will be based on these same vehicles. Row that practicality all of your fornrlations that contain driers will need to be re-written to eliminate lead, luin will be the best time to also replace the old fashioned ta.l.latc and naphtheneto driers, os well as the high cost outer.ton, with the new high concentration driers. E--303 (12`n cobalt), E-323 (Srft manganese), L-371 (l6'/> zinc), E-302 {(>% calcium), F.-390 (I2$> zirconium) should lie used in place of ell the other naphthenates, octoatcs and tallater. thel you may Ime in your formulas at present. By so doing, you will gain 0 lurid start on cur new raw material simplification program and will a .Iso benefit from cert savings. One interesting item of information which came up in a recent discussion with some of our drier nunp] :i ers, v:na regaining tic order of addition of GLD012180 SUI50BCT: KJ-U-lACynSJIT 01'' IBM) CURTAINING PlGlteirS AMD UllXBtft June 2, lyy? Page: Two driers. Calcium, when used, is best added in the grind since it lias good netting properties and it also will prevent absorption of cobalt by the pigments. The remaining driers can be added in any sequence desired, but anti-shinning agents should always be added Jest, after the driers have, bocn^rjj,_i_rrcel in. Oximes will preferentially complex cobalt and other metals, if the driers have not been absorbed first by the vehicle, and loss of dry could ro.su.lt if the anti-skinning agent is added first or if it is blended with the driers for addition to a batch. Please keep this in mind when re-writing your formulae. ItepJ nocnent of Load Containiig_l*ii9i'cnts Several suppliers have published bulletins on this subject, A particularly good one iG Bulletin ICG-0 dated September, 15171, issued by Imperial Color and Chemical Department, Hercules IncorpimteO.. This is an eight page bulletin that contains many specific combinations to illustrate replace ment of lead containing pigments, both for masstonc and tint, and which also includes cost information. If you did not receive this bulletin, please request a copy from your local Imperial representative. Chrome. Greens Chrome green shades cun bo matched with a combination of L-30'i llnnsa Yellow, L-20J Ferrite Yellow, titanium dioxide and cither A-200 Iron Blue or A-1.J.6 Phthuiocyanine Blue depending o.i the cost and durability require ments . A typical combination which Is used in Y-965 Spred Gloss Shamrock Green is 18 poundu vkOjO. 10 pounds L-fO'J, 80 pounds L-30!l and hpounds A-110. Lighter or darker .shades of green will be obtained by increasing the llun.su Ye?dm; or the fiithalo Blue, respectively. Clicii'.etron have announced wr.; blended pigr>ehts that will match specific light, medium and dark chrome green shades, but wo believe this con best bo done by arriving i t our own blond fron pigments that we now have in stock instead of adding to our inventory. Chrome Yellows Primrose Chrome Yellows such as L-.llll are boat matched with the greener (lOu) shade of ban,sc Yellow which we have not been using. If you need this shade, try X30yl ikipress Yellow 101 from Imperial. Some titanium dioxide and a slight addjtion of L-209 Ferrite Yellow is required for n close match. The IJght chrome yellow shade such an 1.-110 can be matched with either L-301. or L.-30U liana:.' Yellows plus titauian dioxide ot a ratio of about 3:2. Medium chrome yellow .shades such an L-133 c.an be matched with Hansa Yellows by blending approximately 10;( 1-30.1, [V:r?> I.-305 and 30$ titanium dioxide. All the above replsccnerts .for chroma yellovrs will be higher cost and will also entail sacrifices in bleeding and heat roir.tnce, as well as in lightfastness. GLD012181 SUBJECT: KEPLACEI-IEhT 01' LEAD COIA'AMi INC! Pl'GMKliTS ADD IrtUEHS June 2, l'ngo Three Where bleed and heat resistance are of greater importance and light fastness is a secondary consideration, a diarylide yellow such as Imperial's >-24y6 could be used in place of 1 Iansa. Where better quality is required, regardless of cost, a more permanent yellow such as 11-1400 from American lloechst (code-L-3^6) could bo used. tolybdnte Ora nge Molybdate orange is used primarily in combination with lithol or DON red:', to produce low cost, bright red shades. for air drying products, toluidine red (l!~710) could be used ns a replacement for the combination uf molybdate orrnge plus lithol or BOM red. however, for baking finishes, a ui n.i troani 1 i no orange replacement such as R-735 should be used. R-73'3 has fairly good opacity and good light fastness when used for masstone, but it is a bleeding pigment. Again, for additional permanency, a higher cost organic orange pigment such as American lloechst 12-1010 (code L-3'.>7) or 12-^000 (code U-7D2) would have to be used. These are over three times the cost of R-735. For a lead-free, bright red shade, R-64o and R-64l could be used. R-64o at $3-00 per pound is n light-shade red, while R-641 at $4.00 per pound is u medium-shade red. Both will be practically non-bleeding and will have good permanency and baking resistance. It is practically impossible to supply o specific recommendation for re placement of each lead containing pigment in the many formulations in which they are used. The above recommendations are, of necessity, general in nature but we believe they will be useful as starting points. Keep in mini that we should endeavor to make all the replacements of lead containing pigments by using, presently coded raw materials. If you have a color matching problem, the use of the COMIC which is available at most plants will allow you to got a good approximation. Some specific customer color standards may need to be modified in order for lend-free versions to be economically feasible and of reasonable durability. Please be sure to include In your f-.iS.urc Product Development. Reports and Monthly Letters of Comments, the progress you have made in replacing lead containing pigments and driers so that this information may be published for general reference. -/r -A- - FG!!:irJi F. G. Hidalgo GL0012182 REPIACEMKHT 01' LEAD CONTAINING PIGMENTS AMD DRIERS June 2, 197? Page Four Table I Y-49 Glid-Tone Hi-Gloss Varnish Y-900 Spred Gloss Enamel White Y-4550 Olid-Guard Alkyd Industrial Enamel White Y-4600 Spred Lustre Semi-Gloss Enamel V/hite Y-5900 Ultra Hide Gel-Flo Alkyd Semi-Gloss White # Lead Drier E-344 - 0.07% Fb E-3?1' - 0.03;^. Mn E-304 - 0.0% Co E-30O - 0.024% Ca E-396 - 0.51% Fb E-382 - 0.034% Ca E-390 - 0.14% Zr E-303 - 0.075% Co E-396 - 0.78% Fb E-304 - 0.085% Co E-392 - 0.076% Zr E-396 - 0.80% Fb), pjw E-3U1 - 0.42% Pb)1'2^ E-30O - 0.045% Ca E-30I4 - 0.044% Co E-396 - 0.58% Fb) B-3l7 - 0.47% Pb)1*0^ E-382 - 0.023% Ca E-303 - 0.051% Co * No Lead Drier E-303 - 0.05% Co E-390 - 0.10% Zr E-302 - 0.04% Ca B-390 - 0.14% Zr E-303 - 0.075% Co E-382 - 0.066% Ca E-390 - 0.14% Zr E-303 - 0.0?,?%. Co E-382 - 0.051% Ca E-390 - 0.145% Zr E-303 - 0.057% Co E-390 - 0.13% Zr E-382 - 0.045% Ca E-303 - 0.051% Co * Percentages shown correspond to metal content based on vehicle solids (by weight). FOR: Technical Directors cc: Regional/Arca Vice Presidents Industrial Sales Managers Plant Managers Quality Assurance Managers Mr. W. D. Kinsell, Mr. L. F. Long Dr. H. J. Kiefer Mr. I. J. Foote Mr. L. Nusser Mr. H. M. Werner Mr. E. J. Romay Mr. R. J. Ha viland Mr. M. W. Mu]aga i GLD012183