Document 855kEmKjZ2QD81QkjmRkjkp7Z

V' Monsanto $uis/on AROCLOR c?y Rutin* and Plattfcizert for Chlorinated Rubber iu . Technical Bulletin 0-124 May, 1937 Monsanto Chemical Company, Oroanle Chemicals Divltien, Si. Louis 1, Mo. Introduction Monsanto produces a series of chlorinated biphenyls and polyphenyls identified by the trademark Aroclor* for use as plasticizers and resins for chlorinated rubber base lacquers, varnishes and paints. These protective coatings are fire resistant, corrosion resistant, chemical resistant (to acids, alkalies and water), and have good electrical insulating properties. When properly pigmented, these coatings have good weatherability. Chlorinated rubber films plasticized with an Aroclor grip common structural materials in strong adhesive bonds. Addition of an Aroclor improves the flexibility and life of chlorinated rubber and plastic coatings. I he formulations suggested in this bulletin are common in commercial practice. They are given as a starting point or guide in developing formulations that expand the outstanding qualities of these compounds. Aroclor.' Monianto Trademark. Reg. U-8. Pat. Off. 2 5" f f1 <t TN* talermoll** contained ta iNit bulletin t*. to our butt tnowlud?*. trut und crurntu, but *11 rucommundution* or lueguttion* *r* m*dt without fuutunluo, tine* th# condition of ** *ro buyend our eontrot. Thu Montunta Chumtaul Compuny dUctaim* uny Mobility Incurred In connuetion wilt. 1h* mm of rhui* dutn or cupgottioni. Furlhuimota, nothing contained tiuruta ihuil bo conttruod ti rocommondution to ut* #ny product in conflict with milting putantt coverin' any mutaritl or Hi um. MCNS 078215 Some important applications for protective and decorative coatings plasticized with Aroclor compounds - - Wood and metal used in yachts, barges and other marine craft. Structural steel for bridges, buildings, roofs and power-lines. Structural materials at chemical plants, pulp and paper mills, textile mills, petroleum refineries and gas works for protection against acid fumes, alkalies and gas. Tank cars and other rolling stock and construc tion machinery for protection against corro sive materials and weathering. Equipment and stop-off lacquers used in elec troplating. Masonry floors and walls. Concrete swimming pools. Highway markings. Cable coatings requiring fire resistance, chemical resistance, and excellent electrical properties. Textile coatings resistant to chemicals, fire and water. -1 - HONS 076216 TABLE OF CONTENTS Nanking and Preparation of Aroclor Compounds.. Properties of Chlorinated Rubber General........ ................. .. ........................... Physical ....................................... .................... Chemical Resistance....................................... Electrical......................................................... Mechanical..... ............................................... Thermal.......................................................... . Physical-Chemical........................................... Viscosity Types..................................... --.............. Solvent Compatibility................................................... Formulation and Properties of Chlorinated Rubber Formulation for Aroclor Resins..................... Formulation for Aroclor Plasticirers............. Properties of Formulated Films................ Applications Alkaline-Resistant Coatings.......................... Chemical-Resistant Finishes........................... Marine Finishes......................................... .. Emulsion Paints.............. ........................ ...... Adhesives._. . ...................................-............ Paper and Textile Coatings.......................... Electrical Coatings...................................... Printing Inks........................................... . . Resins for Chlorinated Rubber.................................. Monsanto Plasticirers for Chlorinated Rubber..... Toxicity. . ............................ . . ........................... Shipping Information..................... ............................. Trademark Index.................... ........... ...................... This bulletin replaces technical bulletin P-124. - 2- Page .3 .4 .4 .4 .4 .5 .5 .5 .S 6 .6 .6 .7 .8 .8 .9 .9 . 10 . 10 . 10 . 10 . 11 . 11 . 12 .12 .13 MGNS 0 78217 Naming (nd Praparatio^ of Aroclor Compounds Aroclor 4465--a 60:40 mixture (biphenyl to terphenyi) with 65 per cent chlorination. Aroclor 2565--a 75:25 mixture (biphenyl to terphenyi) with 65 per cent chlorination. The physical properties of the Aroclor plasticizers vary gradually with the drgrec of chlorination. At low percentages of chlorine, such as Aroclor 1221 and 1232, the compounds are clear and very.fluid. At 42 per cent they resemble vegetable oil; at 48 per cent they thicken slightly and look more like a medium-grade mineral oil. At 54 per cent chlorine, the compounds are quite viscous; if a bottle containing them is turned upside down, the bubble rises slowly to the top. At higher percentages, the biphenyls become gumlike, and a fingerprint on the surface lasts several days. Then at 68 per cent chlorine, the. range is complete; Arodor 1268 Is a white powder. The terphenyls (Aroclor 5442 and 5460) are both yellowish solids. The gradual change in physical properties often allows a processor to select a plasticizer particularly suited for his operation. For example, if he wants to dry mix the plasticizer, Arodor 1268 could be used. It melts at higher processing temperature and can act as a solvent-plasticizer. -3- HONS 078218 Properties of Chlorinated Rubber "Parlon" is a mixture of two polymers with an average chlorine content of 67 per cent made by chlorin ating natural rubber. The typical properties of "Parlon" as given by the manufacturer, Hercules Powder Company, Wilmington, Delaware, are listed in Table I. Table I. Typical Propertie* of "Parlon" General Porm as shipped....................... Color of film............................. Odor............................................ Clarity of film.......................... Taste........................................... Moisture, per cent as shipped. .White, granular powder Water white .None Good None .0.5 maximum Physical Specific gravity........................................................................................ 1 64 Specific volume, as shipped, in cubic Inches per pound........................16.9 Hulking value, gallons per pound........................................................ 0.0735 Index of refraction...................................................................................1-554 Chemical resistance to: Acids, weak................................................................................................ excellent Acids, strong...................... excellent Alkalies, weak............................................................................................ excellent Alkalies, strong.......................................................................................... excellent Salt spray...................................................................................................god Alcohols.......................................................................................................excellent Ketones.......................................................................................................soluble Enters................................................................................... ....................... soluble Hydrocarbons, aromatic...........................................................................soluble Hydrocarbons, aliphatic........................................................................... good Oils, mineral.............................................................................................. good Oils, animal............................................................................................... Por Oils, vegetable........................................................................................... poor Electrical (dear unplasticized film*) Specific surface resistance, ohmsXlO'............................. ................... 2,000 Dielectric strength, volts per mil (ASTM method).............................. 2,300 Dielectric constant at 25C. and 3,000 cycles......................................3.1 Power factor at 25C. and 1,000 cycles................................................0.0015 to 0.0030 Power factor at 2SC. and 1,000 cycles, after immersion in water for 140 hours and surface wiped dry.................................. 0.0027 Pilnt* u*rd in teats were laid down from a toluene aolution. -4- HChS 076219 PropoHios, conf'd. Mochonical (clear unplosticized film*) 20-cp. type Tensile strength, pounds per square inch, dry............ .... 4.270 Tensile strength, pounds per square inch, wet............ .... 4,100 Elongation, per cent, dry................................................ .... 3.6' Elongation, per cent, wet................................................ .... 3.8 Modulus of elasticity, pounds per square inch............. .....1.4X 10s Hardness, Sward index, per cent of glass.................... .... 90 Note: FlfJfihiJrty o( '"ParJon" him increase* with vjrctwty of "Parlon" u*c d 1,000-cp. 4.850 4,360 3.3 3.4 - - Thermal (clear implesficized film*) Burning rate............................. Effect of dry heat on film.... Softening point.......................... nonflammable stable up to and at 125C. dccomjxjscs at 135 to 150C. Physical-Chemical (clear unplasticized film*) Effect of sunlight..........................................................................Discolors and embrittles Effect of aging.............................................................................. Very slight Effect of hot water...................................................................... Rlushcs Effect of cold water.....................................................................None Moisture absorption (80$ relative humidity for 24 hours), per cent...................................................................................... 0.27 Moisture vapor permeability of 0.003-inch film (grams water/ square centimeter/0.01 cenlimeter/hour at 2IC.)............. 0.2X101 Viscosity Types Viscosity Typo Table It. "Porlon" Viscosity Types Viscosity Kongo (eontipoisos) ......................................................... 8 to 12 ........................................................ 16 to 2 5 125 cp.............................................................. .........................................................110 to 190 1,000 cp.............................................................. Examples of actual or suggested applications of the several viscosity types are given below; Type Example of Use 5 cp. In printing inks and as a fortifier for alkyd resin enamels. 10 cp. In high-solids finishes and as a fortifier for alkyd resin and oleoresinous varnishes and enamels. 20 cp. As a film-former in protective coatings andas a fortifier in enamels and varnishes 125 cp. As a film-former in protective coatings, in paper lacquers, adhesives, and textile finishes. 1,000 cp. As a film-former in adhesives, textile finishes and other finishes where flexibility is im|>ortam. Pilm* used in tests were laid down from toluene solution. -5- MQNS Q7821Q Solvent Compatibility Solvents and solvent mixtures suggested for use in preparing formulations with Aroclor and "Parion'' are given in Table III: Table HI. Suggested Solvents tor Compositions with Aroclor and "Parion" "Amsco Solv,M B and E Amyl acetate Butyl acetate Carbon tetrachloride "Cellosolve" Diacetone alcohol Diethyl carbonate Ethyl acetate Ethylene dichloride Hi-Flash naphtha Methyl acetate Xylene Methyl ethyl ketone Methyl isobutyl ketone Methyl salicylate Notol Octyl.acetate "Sovasol"' Nos. 74, 75 "Solvesso 100" "Tollac" Toluene "Union Aromatic Solvent" 3553-10 "Union Solvent No. 30" Formulations and Properties of Chlorinated Rubber Chlorinated Rubber Films Aroclor 1262 and 5460, resinous types, show good compatibility in chlorinated rubber films laid down from toluene solution containing 20 per cent of the plastic in ratios of 2:1 and 1:1 ("Parion" to Aroclor). The plasticizer types, Aroclor 1242, 1254 and 1260, also show good compatibility. Formulations and properties of films derived from both resin- and plasticizer-type Aroclor are listed below. Table IV. Formulations for Aroclor Resin Ingredient Parts by Weight "Parion," 20-cp.............................................16 16 16 12 12 Aroclor 5460................................... .............. 8 8 8 12 12 Dibutyl phlhalale........................... .............. - 4-- -- 3 Tung oil, Thcrmolyzcd, 976........ .............. - - 5 - Xylene or butyl acetate............... .............. 76 72 71 76 73 12 12 3.75 72.25 Table V. Formulations for Aroclor Plasticizer Ingradient "Parion," 20-cp.............................. ...............20 Aroclor 1254 or 1260 ................. .............. 4 Xylene.............................................. ..............76 Parts by Weight 20 7 73 20 20 70 -6- MONS 078221 Kilnid cast from these lacquers show improved characteristics due to At odor. Some of their advantages are listed below: Adhesion Unplasticizcd chlorinated rubber filnts have very poor adhesion. The lacquer film containing Amchr 5460 gave good adhesion to aluminum, bare steel, primed steel, galvanized iron and `Transite" surfaces. Olhca commercial resins, particularly oil-modified alkyd resins, gave better adhesion to glass, tin, copj>er, sealed wood and cellophane. The lacquer films plasticized with Aroe.hr 1254 or 1260 gave good adhesion to "Traniite," cellophane, gal vanised iron and primed steel surfaces. Some of the other commercial plasticizers tested in similar films gave better adhesion to aluminum, tin, bare steel, copper and scaled wopd surfaces Though eom|>ounds with an Arodor alone possess pronounced adhesive qualities, better adhesion to all of the surfaces results if mixtures of Arodor or varied contents are used. Resistance to Aqueous Solutions Chlorinated rubber films with Arodor 1254 or 1260 (plasticizers) and Arodor 5460 (resin) show satisfac tory resistance to solutions of 10 per cent hydrochloric acid, 5 per cent sodium hydroxide, 5 per cent sodium chloride and water spot tests. Film Hardness Softer films were produced with Arodor 5460 in ratios of 5:10 and 10:10 (/fw/nrr'Tarlon") than with other commercial resins in similar mixtures. Likewise, softer films result from Arodor 12.54 or 1260 in ratios of 2:10 and 5:10 (droc/or^Tarlon") than with other commercial plasticizers at these concentrations I'roin these tests compounds with Arodor are shown to have strong plasticizing action on chlorinated rubber. Cold-Checlt Resistance Arodor 5460 is sujwrior to phenol formaldehyde resins in cold-check resistance imparted to chlorinated rubber films, but not as.good as alkyds modified with long oil. Arodor 1260 used as a plasticizer proved somewhat belter than Arodor 1254. Weather Resistance Pigmented chlorinated rubber finishes containing Arodor have consistently withstood outdoor weather tests, but unpigmented finishes do not stand up well regardless of the resin or plasticizer used. Poor resistance to ultraviolet light is also a weakness of chlorinated rubber. Most pigments (except ultra marine blue) are usable with `T'arlon" and are recommended if the coating is to be subjected to outdoor weather or ultraviolet light. However, pigment protection varies considerably. Ins|>cclion of alkyd enamels fortified with "Parlon" showed wcatherability varied from 63 months with chrome green to 4 months for titanium dioxide- iron blue combinations. Sanding and Polishing Properties Plastic films compounded with "Parlon" and containing Arodor 5460, 1254 and 1260 have shown satisfac tory sanding and polishing characteristics. - 7- HONS 078222 Alkaline-Resistant Coatings Applications Products containing Arocfor and chlorinated rubber are highly resistant to alkalies and moisture. Paints with combinations of Arocfor and chlorinated rubber are used in large quantities for concrete floors, walls, swimming pools end other surfaces. A paint formulation is given in Table VI. Table VI. Paint Forimutation for Alkaline Surface (Perl-i by Weight) Ingredient Formulation Formula 1 Formula 2 (ba*mant floor*) (Pod. Spac. TT-8.?I) "Parlon," 20-cp. type............................... Arocfor 1254............................................ "Rezvl 869"............................................... Arocfor 5460 or "Cumar P10".............. ``Beckosol 31"........................................... Tung oil, Thcrmolyzed, 976................... 18 10 8 _ -- 18 10 6 _ Titanium dioxide....................................... Zinc oxide.................................................. Silica flour................................................. Carbon black............................................. Xvlcnr........................................................ Hi-Flash naptha........................................ Totals..................... ...................... 16 2 3 0.2 42.8 -- 100 16 2 _ 0.5 47.5 -- 100 (iwimmirtf pool*) 14.6 4,4 2.9 4.4 19.7 6.5 47.5 100 Chemical-Resistant Finishes Particular care is necessary in choosing resins and plasticizer? for chemical-resistant paints. Chlorinmed ruli ber formulations with an Arocfor have proved outstanding for acid and alkali resistance. Five formulations are shown in Table VII. TsbU VII. Formulations for Chemical-Resistant Paint* {Parts by Weight) Ingredient Formulation < Interior "Parlon," 20-cp. type........... Arocfor 5460.......................... " Makefile XJ-12895"............ "Reayl 807" (solids)............ Arocfor 1254......................... Arocfor 1260.......................... Tung oil, Thermolyzcd, 976.. Iron oxide.............................. Titanium dioxide................... Zinc oxide.............................. Zylene...................................... Hi-Flash naphtha................. Toluene.................................... Totals........................ add* and Italia* 16 6.4 -- 8 -- 16 -- -- --53.6 100 2 Exlorlor uio, eld* 16 _ __ 6.4 4.8 _ 4.8 16 __ __ 52 _ -- 100 3 Exttrier 16 _ 6.4 - 4.8 4.8 16 __ _ 52 -- 100 4 Maximum raiitlanca, acid* ond alkali** _18 8 6 _18 _ 39 11 100 5 Soap romtont 12 6 7.7 __ 18 6 28 10.3 12 100 MCNS 078223 These formulations were applied to metal bars or panels and tested for resistance. Formula I showed good resistance to 10 per cent hydrochloric acid and 5 per cent sodium hydroxide solutions. Formula 2 gave excellent outdoor protection to metal surfaces on plants manufacturing acids. Formula 3 performed well on exteriors of plants producing alkali. Formula 4 had excellent resistance to acids, alkalis and salt solutions. It aiso showed good adhesion to glass and other surfaces. Formula 6 proved good for resistance to warm, soapy water. Note: No finishes with Aroclor or chlorinated rubber are recommended for con tinuous exposure at temperatures above 140 F. Marina Finishes Use marine industry makes great use of chlorinated rubber coalings plasticized with Aroclor to protect wood and metal on boats, barges and other marine equipment. They possess good resistance to salt water and their hard finish deters algae and other marine growth. A suggested formula for a while marine paint is given in Tabic VII). Tabln VIII. Formulation for a Chlorinated Rubber Marine Paint Ingredient Parts by Weight 'Tarlon," 20*cp. type.......................................................... 20 Aroclor 1254.......................................................................... 6 "Resyl 869"........................................................................... 6 Titanium dioxide................................................................... 25 Xylene...................................................................................... 23 Hi-Flaxh naphtha.................................................................. 20 Total.......................................................................... 100 Emulsion Paints If chemical resistance is required on porous surfaces, Aroclor 1254 is often added to chlorinated rubber emulsion paints. The Hercules Powder Company reports that preferred water phases for such paints are either a I per cent distilled water solution of "Aerosol OT" or a 4 per cent distilled-water solution of sodium oleitc. A lacquer-to-water ratio of 2.5 to 1 (by weight) is suggested for the complete emulsion. 'Tarlon" of any viscosity may be used. A typical paint phase for such an emulsion paint is given in Tabic IX. - 9- MONS 078224 Table IX. Formulation for Paint Phase of Emulsion Paint Ingredient Part* by Weight "Parlon".................................................................................. 28 Aroclor 12S4.......................................................................... 14 "Cumar P10"......................................................................... 10 Xylene...................................................................................... 24 Hi-Flash naphtha.................................................................. 24 Total.......................................................................... 100 Adhesives Chlorinated rubber adhesives with an Aroclor were developed originally for adhering labels to acid bottles because of their general resistance to chemicals. These adhesives are also of unusual interest because they are fire resistant. A typical formulation is given in Table X. Table X. Formulation for Chlorinated Rubber Adhesive Ingredient Parts by Weight '`Parlon," 125-cp. type......................................................... Aroclor 1254.......................................................................... Aroclor 1260.......................................................................... Toluene................................................................................... Total......................................................................... 20 6 6 68 100 Pager end Textile Coatings Chlorinated rubber coatings with Aroclor are worthy of consideration for specific end uses in the paper and textile coating fields. In general, this type of coating is restricted by odor and taste. Unpigmented fin ishes seem suitable for certain fabrics used indoors, but not for exposure to high temperatures or direct sunlight. Electrical Coatings because of their desirable electrical properties, these compositions are useful for insulating and protecting electrical wire and ap|>ara(us from moisture. With selected fungistats and waxes, coatings of this type are used to protect electronic equipment in the tropics against moisture and fungi. The fire resistance of these plastics Is an added dividend in the electrical field. Printing Inks Printing inks requiring a fast drying time and chemical resistance are often based on chlorinated rubber compositions plasticized with an Aroclor. These inks are especially useful on soap wrappers and boxes, bottle labels and many other commodities because of their alkali resistance. I..... ......... .......... ............................. .............................. ... -10- *CNS 078225 m. Other Retins and Plasticizers Compatible With Chlorinated Rubber The resins and Monsanto plasticizers given in Tables XI and XII are compatible with chlorinated rubber, but none gives the over-all desired qualities attained by using an Arodor. The strong points and limitations of each are known. If their use is necessary for specific applications in chlorinated rubber, more detailed in formation on them may readily be found. Table XI. Resini Compatible with "Parlon" "Ambcrol 801, 8061', ST-137, K7" Arodor 1262, 5460 "Aroplaz 920, 930, 935, 940" "Bakelilc" XR-3180, XR-4503, XR-4006, HR-2963, XJ-9868, HR-1329, HR-3360" "Heckacile 1112" "Bcckaminc P-138, P-254" "Super-Beckamine 3501" "Bcckapol 1400" "Beckosol 1 (solid), 18, 31, 34, 40, 1329" "Beetle" Resin 227-8 "Clorafin 70" Copal "Cumar P10" Dammar "Duraplex C-45-LV, C-48, C-49, C-50-LV, C-51, C-62, D-61, D-62, E-71, E-71-A, E-73" East India gum Ester gum Ethyl methacrylate "Eslerol 750" `T'ormvar'' "Gclva 2.5" "Glyptal 1247, 2450. 2454, 2458, 2464, 2466, 2500" "Lewisol 21., 28, 33" Methyl methacrylate polymers "Neville R-3, R-10" "Pentalyn A, G, M, X" "Petrex 1, 130H" "Phenac 633-M" "Rczyl 1 16, X31 5, 412, 775, 803, 807, 829, 869, 880, 1103" Rosin Sanlolilc MI'H (sulfonamide-aldehyde resin) "Stabelite Ester 1, 2, 10" "Stabclite" resin "Su|>cr-Bcekaciie 1001" "Syntex Hi, H3,1112, 17, 213, 22, 28, 29, 32, 36" "Teglac 15, Z-152" "\'elsicoI AD6-3" "Vinsol" Table XII. Monsanto Plasticiiers Compatible with "Parlon" Arodor 1242 Arodor 1254 Arodor 1260 Dibutvl phthalatc Diethyl phthalate Dimethyl phthalate Santidzcr B-16 (butyl phthalyl butyl glycolate) Santidzcr M-17 (methyl phthalyl ethyl glycolate) Tricrosvl phosphate Triphenyl phosphate Santolur, Samietter Monsanto Trademarks. Rep U S. Pat Off. -11- HONS 0782*6 Toxicity Animal toxicity studies and 20 years of manufacturing and use experience indicate that Aroclor compounds are not serious industrial health hazards. If the materials arc healed to volatilization, ventilation should be provided to prevent inhalation of vapors. This is true of other major components of the formulation as well as the Aroclor compounds. Repeated or prolonged skin contact should be avoided although there are few instances of skin irritation. Human patch tests with finished products containing Aroclor compounds have shown no irritation. Mon santo will furnish information on specific Aroclor compounds upon request. Shipping Information Radiations - - None Standard Container* Steel and Fiber (Aroclor 1268, S460) drums. Rail Classification Chlorinated diphenyl (synthetic resin, liquid, NOIBN) Synthetic resin, liquid, NOIBN Snythetic resin, other than liquid, NOIBN -- Aroclor 1142, 1148, 1154, 1160, 1162, 1168, 1221, 1232, 1242, 1248, 1254, 1260, 1268 -- Aroclor 1260 mix, 1262 mix Aroclor 2565, 406S, 4465, 5042, 5060, 5442, 5460 Truck Cleitificatlon Synthetic resin powder, NOI Synthetic resin, lumps or'solid mass, NOI -- Aroclor 2565 - Aroclor 4065, 4465, 5042, 5060, S442, 5460 -12- HCNS 07822? Trademark Indax Trademark Company "Aerosol OT" "Amberol" "Amsco Solv" "Aropl&z" "Bakelite" "Beckacite" "Beckamine" "Beckopol" "Beckosol" "Beetle" Resin "Ccllosolve" "Clorafin" "Cumar" "Duraplex" "Esterol" "Formvar" "Gelva" "Glyptal" "Hercolyn" American Cyan&mid Company Rohm & Haas Company American Mineral Spirits Co. U. S. Industrial Chemicals Co. Bakelite Company Reichhold Chemicals, Inc. Reichhold Chemicals, Inc. Reichhold Chemicals, Inc. Reichhold Chemicals, Inc. American Cyan&mid Company Carbide & Carbon Chem. Co. Hercules Powder Company Barrett Division, Allied Chem. & Dye Rohm & Haas Company L. Sonnebom Sons, Inc. Shawinigan Resins Corp. Sh&winigan Resins Corp. General Electric Company Hercules Powder Company "Lewisol" "Neville" "PentaJyn" "Petrex" "Phenac" "Reayl" "Solvasol" "Solvesso" "Stabelite" Ester "Stabelite" Resin "Super-Beckacile" "Syntex" "Teglac" "Totlac" "Troluoil" "Transile" "Velsicol" "Vinsol" Hercules Powder Company Neville Chemical Company Hercules Powder Company Hercules Powder Company American Cyanamld Company American Cyanamld Company Socony*Mobil CHI Company Esso Standard Oil Hercules Powder Company Hercules Powder Company Reichhold Chemicals, Inc. Flimkote Company American Cyanamid Company NeviUe Chemical Company Anderson-Prilchard Oil Corp. Johns-Manvllle Sales Corp. Velsicol Corp. Hercules Powder Company riuh?/T,wOwB:j-IrMc -mvii mu -13- Prist* Is UJ.A. KGhS C78228 I I AROCLOR Rosin* and Plasticizer* for Chlorinated Rubber Mm m r I* T*chnicl ftultotifi 0-194 M*y. 1957 Monsanto U.. ... Fi Iwrflw InUrmitiM n the product* described In th bulletin confect tHe nitmt Memento office. MONSANTO CHEMICAL COMPANY ST. LOUIS, MISSOURI AKRON ATLANTA BOSTON CHICAGO CINCINNATI CLEVELAND DETROIT HOUSTON LOS ANGELES MINNEAPOLIS NEW YORK SAN FRANCISCO SEATTLE WILMINGTON MONSANTO CHEMICALS LTD. London MONSANTO CHEMICALS (AUSTRALIA) LTD. Molboumo MONSANTO (CANADA) LTD. Montrool . Toronto # Vancouver HONS 078229