Document Eq7Eeo6V1Q9vxEyjZ0wGeQq4V

Auarthakr ish , K . Leahy f " Smith 1- 126 >; , Ikeda, - ,, '25 tt . Pike, B -5262 J . ~z> . Lqrman, ML li - N luberron, bgam: J 1 = --p 19, 1974 E- E. SYAIN, IF;, ? t F DEPAF<Itv`ET ~T WTLMIKGTON , 3-2373 VINYL CHLORIDE. Rex: Your letter to J. B. Lyman, dated 2/12/74 Union Carbide;s 3AEELITE E-200G, a vinyl copolymer resin, is the basic ingredient in our polyvinyl chloride powder coating composition. Since vinyl chloride monomer is probably carcinogenic, we have requested Union Carbide to provide data on the residual monomer content the E-2000 resin may have and, if possible, set a specification limit. Attached is Union Carbide's reply stating that (a) because of the exceptional volatility of vinyl chloride monomer, they do not routinely measure the residual' monomer content of the resin, and (b) after examining typical samples of the E-2000 resin, they found no detectable residual vinyl chloride monomer. Their testing method is sensitive to 1.5 ppm. Union Carbide is also' claiming that the E-2000 resin meets certain food additive regulations for polymeric coatings as food contact surfaces applied to. metal substrates. Handling of the polyvinyl chloride powder in the laboratory, i.e.. transferring from-one container to another or spraying, is done in veil ventilated (negative pressure) hoods and with ade quate respiratory protection. He do not have visible dus.t in the air when these operations are performed. The dust masks- we are using are the Condo style #36430 made by the Mine Safety Appli ances Company, Pittsburgh, Pennsylvania, with type "H" ultrafilters (#76876)- These filters are tested and guaranteed to be at least 93.232 efficient against 0.3 micron diameter particles (Bureau of Mines Approval No. 21B-90). The average polyvinyl chloride powder particle sise is approximately 50 microns- with a EID10900 rings of 4-94 moron. We clvays recommend that skin ocotact should be avoided if at oil possible, end that soep end vaster should be used to remove powder from skin. Since Haskell Lebcr-torv is presently reviewing the toxicslogical aspeers of our polyvinyl chloride powder costing formula tion ingredients (ref. letter :c B. J. 'Troch imewi c z from V. Ananwakrishnac, dated 10/19/73), you may like to relay this letter ~o H . J. Trochrmovric z . .Please review the information provided and advise us of any hazards or additional.safety precautions we should be taking. HDY:sr ' attachment EID10901 UNION' CARBIDE. CO RPC RATION CHEMICALS AND PLASTICS R1VLF: r;sd, 3CUNO BROOK, tv. J. OEEOE ' DHONE ;i'C2) 256-BOOO ?ebru-ry 15. 1S74 i/ I \ Mr. M. D. Yallourakis E. I. DuPont De Nemours Co. Experimental Station Laboravory Fabrics L Finishes Department . Wilmington, Delaware 12 82 8 Dear Mr. Fallourahis : Mr. Joe Eagan of these laboratories has asked me to write- you- regarding the -food additive status .of our E-2000 vinyl resin and its residual vinyl chloride monomer content. E-20-00 is a vinyl copolymer resin listed by chemical identity in Food Additive Regulation 121.2514 for Resinous and Polymeric Coatings as food contact surfaces applied to metal substrates. Food Additive Regulations 121.2526 for components of paper and paperboard and 121.2550 for closures refer to 121.2514 for a list of acceptable materials. The finished coating or closure must meet the extrac tion specifications given in the appropriate regulation. Be cause of the exceptional volatility of vinyl chloride monomer we do not routinely measure the residual monomer content of our vinyl resins as part of cur quality control procedures. However r we have examined typical samples of "Bakelite" brand vinyl resin E-2000 for residual vinyl chloride monomer content using the best method available to gas at this time (a flame ionisation gas chromatographic method) that is sensitive to 1.5 ppm. Our results indicate that in general our E-2000 vinyl copolymer contains no dectable residual vinyl chloride monomer. We hope this information is helpful to you. Very truly yoursf b-9 9: , w. B. Actant - Kan ace r, xDA Liais on EID10902