Document 2oXL10N9Bxb1evq9knyK0qyg

i-r^m / ' ' '" &7 Monsanto IMPROVED PLASTICIZERS FOR TECHNICAL SERVICE BULLETIN POLYSULFIDES We would like to present candidates for polysulfide sealants. We have used as a control the chlorinated biphenyls. A. AUTOMOTIVE The two most commonly used chlorinated biphenyls are Aroclor 1248 and 1254. We suggest the following candidates for evaluation: 1. Santicizer 679 2. Santicizer 213 3. Aroclor 5442/5460 (30%) plus Santicizer 261 (70%) for Aroclor 1248 replacement. 4. Aroclor 5442/5460 (52%) plus Santicizer 261 (48%) for Aroclor 1254 replacement. These products should have minimal softening or marring effect on acrylic enamels. The use of chlorinated terphenyls (Aroclor 5442/ 5460) will stabilize the physical properties of the sealant over a temperature range up to 70 C, thicken the plasticizer to give non-sag properties and provide the excellent adhesion characteristics of Aroclor plasticizers. On a per pound basis, Santicizer 679 is cheaper than Aroclor 1248 or 1254. Santicizer 213 is cheaper than Aroclor 1248 or 1254 on a pound-volume basis. Santicizer 261/solid Aroclor blends compare favorably with Aroclor 1248 or 1254 on a pound-volume basis. Aroclor 5442 and 5460 can be very readily dissolved in Santicizer 261. 0506769 | TOWOLDMON0034332 WATER_PCB-00018801 B. LIGHT CONSTRUCTION The most commonly used Aroclor plasticizers in building sealants are: Aroclor 12-48, 1254, 1260 and 1262. Monsanto suggestions for replacements are: 1. Sanlicizer 261 2. Sanlicizer 148 3. Aroclor 5442 or 5460 blends with Santicizer 160 or 261. Sanlicizer 261 An evaluation of Santicizer 261 versus Aroclor 1254 in polysulfide is shown in Tables 1 and 2. 0S08770 TOWOLDMON0034333 WATER_PCB-00018802 Table 1 SANTICIZER 261 VERSUS AR0CL0R1254 Molecular Weight Vap. Press. {200 C) Viscosity (centistokes) Weight/Gallon (LB 25 C) Santicizer 261 368 1.00 mm. Hg. 78.3 (25 C) 89 Aroclor 1254 326 9.00 mm. Hg. 7.6-10.0 (100 Cl 12.8 At 25 PHR <A> in LP-32/SRF at 30 PHR Wt. Loss (7 dBVi bi 100 Cl < 15% ~ 25% At 40 PHR (B) in LP-32/CaCO^ at 40 PHR Shore A %Wt. Loss (7 days at 70 Cl 12 1.9% 21 2.1% 100% Modulus (psi) 100% Modulus (7 days in H20 at 70 C) (psi) 40 33 41 38 Tensile Strength (psi) Tensile Strength (7 days in H20 at 70 C) (psi) 104 102 99 157 % Elongation % Elongation (7 days in H20 at 70 C) (psi) 365 665 475 835 0306771 I TOWOLDMON0034334 WATER_PCB-00018803 FORMULATION Polysulfide ^ SRF Carbon Black Uncoated CaCO^ Plasticizer Table 2 COMPARISON OF SANTICIZER 261 VERSUS AROCLOR 1264 PHR A WEIGHT PHR 100 100 30 100 25 40 40 bweight 100 CATALYST SYSTEM Lead Dioxide Stearic Acid Plasticizer 50 5 45 15 50 5 15 45 Sulfur - - - 0.1 1,1 Thiokol's LP-32 I OS08772 TOWOLDMON0034335 WATER_PCB-00018804 Santicizer 148 Santicizer 148 should give lower volatility in polysulfides than Aroclor 1254. H is lower in viscosity. Santicizer 148 Santicizer 261 Vapor Pressure mm. Hg. (200C) 0.54 1.00 Viscosity Centistokes (25 C) 22.0 78.3 Santicizer 148 (iso decyl diphenyl phosphate) has excellent resis tance to U. V. and outdoor weathering. This factor could lead to improved performance in sealants requiring good adhesion to glass. Evaluations so far indicate that Santicizer 148 performs favorably in comparison to Santicizer 278 in insulated glass sealants. Santicizer 348 is appreciably cheaper than Santicizer 278. Aroclor 5442/5460 Blends in Santicizer 160/267 Aroclor 5460 in blends with Santicizer 160 and 261 has been screened in a polysulfide formulation. Results are shown in Table 3. By using Aroclor 5442 or 5460 blends with Santicizer 160 or 261, a formulator can have much greater versatility in obtaining an equivalent to or a compromise between Aroclor 1248, 1254, 1260, 1262. Ways to do this are shown in Table 4. The solid Aroclor can be easily dissolved in Santicizer 160 or 261 by heating the blend. In the case of Aroclor 5442, a temperature of 50 C (122 F) should be adequate. 0508/73 TOWOLDMON0034336 WATER_PCB-00018805 Polysulfide (1) Filler Plasticizer Lead Dioxide Ssnticizer 160 Stearic Acid 100 ) ) 30 ) 1 20 I 50 I ) 45 ) I &) Table 3 100 15 Plasticizer Aroclor 1254 Aroclor 1260 Aroclor 5460/Santicizer 160(2/11 Aroclor 5460/Santicizer 261 (2/1) Aroclor 5460/Santicizer 261 (1/1) Initial Hardness (24 Hour Cure) Shore A 28 30 30 29-30 26-27 0) Thiokol's LP-32 12) Activated carbon method Volatility % Plasticizer Lost (1 Day/ 87 C)<2> 7.5 4.7 4.5 4.0 4.6 0S0877<t TOWOLDMON0034337 WATER_PCB-00018806 c Table 4 Santlci2er 261 Santici?er 160 ( Aroclor 1248 ( Aroclor 1254 Viscosity (Centipoises) #6 HAT Brookfield at 23 C % Aroclor 6460 By Weight 33-1/3 50 67-2/3 ~ 670 -- 9,700 - 440 ~ 4,000 300-400 cps I ~ 458,000 ~ 375,000 : ^ 12,000 cps 1 TOWOLDMON0034338 WATER_PCB-00018807 "Nothing contained heielr It to be constteed at t teconimenSetien 1o use any pioducl In conf.ict with any patent. MONSANTO MAKES NO WARFiANTIFS AS TO TKt I UNfSS OR MIRCHANTABILITI Of ANY PKOBUCTS fill IHRII' 10, no gunentee of iillslaclory multi fiom reliance upon contained Infotmalionor recommendations, and disclaims all liability for any resulting lost cn damage." MONSANTO COMPANY ORGANIC CHEMICALS OIVI8ION. 109 No. Lindbergh Blvd., St. Louii, Mo, SJ16C Alton, Ohio 4*313 200 Spiingside t)i. Allinli, Ga. 303?6 3400 Peachtree Rd., R.t. Boston, Mist. 02149* tveielt Station Chicago, HI. 63DIM 3I5B net Plaints Avc , Das Plaines, III. Ci'ulrmali, Ohio 41300* 1501 Madison Road Delroll, Mid,. 4B?J3 500 Northland Tcineit Cist Honolulu, Hawaii 9561? 577 Ala Moana Blvd. Houston, It* 77017 5051 Westhalmar Road los Angeles, Calil. 90C22* 5670 1. Flolilta St. HEW ENGLAND ARIA Hydtocatbons S PolymelS Die. 730 Worcestei St , Indian Otcliard, Mass. 01051 Plastic Ptoducts & Resins Pit. P. O. Bo. 2130, Sptingfitld, Mass. 01101 Hew Toil, N.Y. 10017 377 Pall Ave. St. Louis, Mo 63:66< 800 N. Lindbergh Blvd SAN FRANCISCO BAY AREA 3710 Lafayette, Santa Ciata, Cal l 9305? Seattle, Wash 98131 211? Third Avenue Wilmington, Bah 198C3* ?005 CoTcoid Pile, Fairfax Monsanto 0508776 ?-30G9-0i> 70-6 LITHO IN U.S.A. ^ ^ WATER_PCB-00018808