Document 2JBM9zzxEjxqgrLDvNjmgQd0R

Wt -// Results reported la letters of 9/15 end 11/12/71 COMPAMY CONFIDENTIAL File No. 7726-1 ANALYTICAL RESEARCH DEPARTMENT REPORT ADP 7727 Subj set Extraction of Lesd fron Cured Paint Manufecturer Department Requested by s-w c. AfielvT'toel urA W. W. Cuatomsr Date Completed 11/11/71 ABSTRACT The amount of lend extracted by 4X Acetic Add and 0.5Z HC1 from cured films of Super Kern Tone, Dower White, Ram Clo, Dawes White, Kem-l-Coat, Bright White, Kern Lustrel Enamell. Lemon Tallow and Aery1yd Yellow for Caterpillar ere as follows: Semple K7 W 97 K3 W 97 A3 V 16 F65 Y 2 JX 5630 UK of Pb Ext. per Sq. In. of Film AX Acetic Add 0.3X HC1 0.4 1.2 20 120 0.4 0.4 3.4 52 460 26 "1 jits***^ Him/sc cc - m FCG RCH JOT Richard W. Scott, Director Analytical Research Deportment Shenrin-Willieoe Beeeerch Center 0007-SWP-03 8173 N24274 COMPANY CONFIDENTIAL ADP-7727 PURPOSE As a companion project to ADP-7726 la which various paints were analyzed for lead content, the determination of the amount of lead leached from some of these and other paints was requested. The leaching agents chosen were 4% acetic and 0.5Z hydrochloric add. The following paints were subjected to the extraction tests: K7 W 97, Super Kern Tons, Dover White, C2231 K3 W 97, Kern Clo, Dover White, C22B1 A3 W 16, Kem-l-Coat, Bright White, C1981 F6S T 2, Rem Lustral Enamel, Lemon Yellow JX 5630, Aerylyd Yellow for Caterpillar The amount of lead present In the above paints is as follows: K7 W 97 K3 W 97 A3 W 16 F65 Y 2 JX 5630 Z PB (on NVK) 0.0016 - By analysis, ADP-7726 0.0105 - By snslysls, ADP-7726 0.2153 - By snslysls, ADP-7726 29.6X - Calculated 26Z - Calculated Sample CONCLUSIONS AMD RESULTS 4X RAC as Extractant 0.5Z RC1 as Extractant ppm Pb ligt Pb ext. per ppm Pb Ug* Pb axt. par In extract sc. In. of film la extract sc. In. of film K7 W 97 K3 W 97 A3 W 16 F65 Y 2 JX 5630 0.2 0.6 10 60 0.2 0.4 1.2 20 120 0.4 0.2 1.7 26 230 13 0.4 3.4 52 460 26 * 1 U| - 0.001 mg. The extractions were conducted for 24 hours at room tparatuia la a i--ll i si immsnilsit by FDA. The general procedure closely approxi mates ARM F34-6E. la the FDA cell 100 sq. In. of film Is exposed to 200 ml. of solution. Ths eaount of lead In the extracta was determined by mesne of atomic absorption spectrometry. CONFIDENTIAL 0007-SWP-038174 OO07-SWP-OO0110355 COMPANY CONFIDENTIAL ADP-7727 -2- An approximate percentage of the leed extracted baaed on Che total lead present la given in the following table for the panela prepared in our laboratory. 42 SAC 0.32 HC1 K7 W 97, Super Kam Tone K3 W 97, Us Glo A3 W 16, Kem-l-Cost 402 142 142 402 402 362- The corresponding figures for F65 Y 2 and JX 3630, while not eatinated, would of course be very low. The Super Kaa Tone, Ken Glo and Kan-l-Coat materials were brushed on aluminum panela and allowed to air dry a minimi of seven days prior to testing. The Ken Luatral panels, which were supplied by Lee Williams, were coated in April, 1971. A catalyst, V6 V 241 containing Desmodur N, waa used in curing the JX5630 panala supplied by Willla Whited. DISCUSSION Four percent acetic add waa chosen as one of the- extractants bacauaa it la employad in the FDA procedure for the 'Determination of Lead in Pottery'. In this procedure the vaesel is filled with 42 acetic acid, allowed to etand at room temperature for 24 houra, and the lead in the leeching solution dseermined by atomic absorption. A ssnpla la considered violative If it contains 7.0 or more |ig laad par ml. of leaching solution. The 0.3Z HC1 extractant was suggastad by t. W. Scott as balng tha approximate concentration of etaaach add. CONFIOMl O007-SWP-0 38175 T 0007-SWP-000110356