Document gDdQpmjeG8q6dqaNboEE8v823
MOV H 1972
W. 7 0 MC 01/f ,'iO 1972
TRftDB-MAIRTEKANCE PRODUCTS Reanarch Report No* TM-110-A Interim
IEflD REMOVAL - EXTERIOR HOUSE PAXHT8
By? Mr. R. H. Ruzicka Mr. Ro w. Green Mr. J. E. Southwlck
Date* October 19, 1972
DPR: 2117~A,C
DistribR/tionsy Mr. c. W. Wright - UCB Dr. H. J. Kiefer - UCB Mr. G. X,. Bechtel - UCB Mr. H. G. Beck - UCB Mr, p. g . Hidalgo Mr. E. B. Buchner Mr. r . p, Shong Mr. s. T. Bowell Mr. W. M. Tome
' Xlbrary M-E (2) File
GLD012293
-1 INTRODUCTION To comply with the Chicago regulation allowing a maximum of .06?; load on the total non-volatile a program was initiated to remove all lead from solvent house paints* For investigative purposes our paints were divided into three groups as follows* A. Alkyd house paint - Y-1901 B. Linseed oil house paints - Y-1801 C. . Exterior wood primer - Y-1851
GtDO12294
2-
SUMMARY
1. Manganese In combination with zirconium actually retarded dry a3 the manganese content increased. This was observed in all 3 systems* Alkyd, Oil, Primer.
7i Manganese in combination with zirconium and cobalt retarded dry as the manganese content increased* all 3 systems.
3. Zirconium gives a tougher throughrdry. than lead yet the film remains flexible, as tested on the conical Mandrell* all 3 systems.
4. High cobalt concentrations, up to 0.13% metal for alkyds and 0.125% metal foie oil, on vehicle solids, can be used without causing wrinkling if in combination.with zirconium.
5. For feeder friers Troykyd Perma~Dry gives a boost to initial dry while Mooney #30 has no effect. Shelf stability Is still being investigated.
6* calcium as a "block" drier, or added to be absorbed by. the
. pigment to prevent drier loss, has ho initial effect on.
'dry
:
7. In all 3 systems lead-free drier combinations are equal to or better than the standard drier combinations.
Specific recommended drier combinations are as follows*
A. Alkyd House Paints - Y-1901
.J -
Standard
, Drier
Lbs ,./lOQ gallons
% Metal dn vehicle Solids
E-303 E-325 E-347 E-396
0.50 1.34 6.43 4.30
0.0161 Co 0.0323 Mn 0.6206 Pb . 6*5072 Pb feeder
Recommended Lead-Free
E-303 B-390 TroyKyd Parma-Dry
1;00 5.00
1.50
0.032 Co 0.16 Zr
Cost increase 2.14 per gallon over standard.
GL0012 295
3- "
Velvet House paint
Drier
Lbs./lOO Gallons
% Metal on Vehicle Solids
E-303 E-347
1.00 3.40
0.0625 Co 0.6375 Pb
Recommended iead-Free
E-303 E-390
1.00 5.00
0.0625 Co 0.3125 Zr
cost increase 3.3d per gallon over standard.
B, Oil House Paint - Y-1801
t
Standard
Drier
Lbs./lOO Gallons
% Metal on vehicle Solids
E-325
0.66
E-342
11,60
E-396
5.00'
E--382
2.70
/'* )
Recommended Lead-Free
0.0165 Mn 0.7269 Pb 0.5744 pb feeder 0.0423 ca
E-303 E-390 TroyKyd Perma-Dry
3.00 5.00
1.50
0.0940 Co 0-1567 Zr
Cost increase 3.4d per gallon over standard.
Exterior Wood Primer - Y-1851
Standard
Drier
Lbs./lOO Gallons
% Metal on Vehicle Solids
E-325 E-347 E-390
1.60 4.50 1.50
Recommended Lead-Free
E-303 E-390 TroyKyd Perma-Dry
1.00 5.00
1.50
0.0483 Mn 0.5436 Pb 0.0604 Zr
0.0403 Co 0.2013 Zr
Cost increase 2.5d per gallon over standard.
GLD012296
-4-
At 50 P. and 70% R.H. the paints dried considerably slower than at more normal drying conditions; however, the relationships were the same. At 50 F* and 70% R.H. all of the oil HcSuse paints wrinkled including the standard, which has no cobalt drier so no special significance could fee attributed to the fact that cobalt drier was present in the new recommendations. These paints will be checked again at 3 to 6 months shelf timei to check for loss of dry and/J.or any change because of the Mooney or TroyKyd feeder driers. Blister resistance tests for Y-1851 are to be completed.
DISCUSSION Paints were prepared as "blanks", without driers, and then various ?rier additions were made to carefully weighed samples. These finished samples were then aged for 24 hours and checked for dry, on drawdowns (3 mils vret), on aelaed .Leheta charts. The drier coNbinations were tested under both normal exterior summer drying conditions and severe drying conditions in the environmental room.
GLD012297
CODES! used in the following detailed listings*
D Dry Through
TP ** Tack Free
S Soft
M Mushy
E-303 - Cobalt 12%
E-325 - Manganese 9%
E-347 ** Lead 36%
E-396 ** Mooney Lead Feeder
E-390 = Zirconium 12%
E-371 ** Zinc 16J6
/
E-382 * Calcium 6% ^ ^
E-J42 Lead 2496
,
All dry time reported in hours.
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COMMENT
Most of the drier recommendations made.in this report are in line with the supplier;'* recommendations with exception of the linseed oil house paint, Y-1801. The >0996 cobalt is excessively high in relation to the recommended amounts of ,02 to .04%. The reason for this high amount was to achieve, equal dry to the . standard lead combination under cold dhrnp.drying conditions In the environmental chamber, we have been told that cobalt drier in excess of .04% will cause premature cracking and checking,.: Our own exposure reports of 1952 to 1956 Show bad cracking when cobalt drier was used in Y-1850. (House paint - fume resistant.) We do not recommend issuing Y-1801 with ,09% cobalt without adequate exposure history. If we had to issue a lead-free formula today we would go with a drier combination that would be 2 hours slower than standard under normal drying conditions and 6 hours slower under cold damp drying conditions. These drier studies for y -1801 were done on, the 100% oil formula. Future work will be done with the C-plgment replacement formula ' vehicle system which replaces 0-131 bodied linseed oil with alkyd resin V-2385. It ishoped that the dry improvement will be sufficient so the cobalt metal levels can be reduced to & safer level an. prevent possible cracking.
GLD012303
\ \' 1 `FROM
: H. D. Swafford
DATE: May l'i 1972
CITY : Coatings ft Resins Research Center Strongsville, Ohio
SUBJECT:
TRACE HEAVY METALS IM GLIDDEN RRODUCTS INTERIM REPORT
i* i
W. TOMC
MAY 25 1972
FOR: F. G. Hidalgo
cc: R. Shong E. B. Euchner H. J. Kiefer (UCB) T. Walsh (UCB) S. T. Bowel! J, Southwick J. Patrick G. Proffitt Js>'Top(
?C- *o 't
Some time back, l-i^llon quantities of eight 8) higli-volume Glldden products were obtained with the goal of analyzing(them for < number of trace heavy metals. This report, summarises the findings relative to th- lead and cadmium contents of the 8 products.
A modified nitric acid ~ perchloric acid wet digestion method was used to achieve sample dissolution, followed by atomic absorp ion analysis for the two elements. The following results were obtained:
SAMPLE Y-3418 Y - 34 54 Y-3600 Y-4600 Y-917 Y-3608 Y-1828 Y-1801
T.il.V. 49,0$ 49.9$ 57-3$ , 65.6$ ) 49.3$ 53.8$ 66.0$ 84 ..1$
LEAD (On So'ids) 15.5 P.P.M. 32.3 P.f.M. o.2i:;' 0.46$ 0.29$ 0.12 s 1.36$* 0.41$'
CADMIUM (On Solids) 7.0 P.P.M. 3.8 P.P.M.
35.1 P.P.M. 2.4 P.P.M. 3.0 P.P.M. 3.9 P.P.M. 2.9 P.P.M. 0.7 P.P.M.
* This exceeds the amount that should be present, so the analysis was repented, with similar results being obtained. The pigments (plus Nuact paste) were tiien removed by centrifugation and lead was determined on the clear vehicle. A value of 0.12$ lead was obtained on the vehicle, which calculates to 0.15$ of the paint solids. The balance (1.21$) was removed by the centrifuging process ITluact paste?).
*
Analyses for the other trace heavy metals in these paints will proceed as time permits (to experimentally devise and evaluate the analytical techniques needed for each element.
hga H. D. Swafford
GLD012304