Document oM2RYyBnYkGad6xOgnOpV50D

Monsanto TECHNICAL SERVICE BULLETIN S^IMPROVED PLASTICIZERS FOR 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 Aroelor 1248 and 1254. We suggest the following candidates for evaluation: 1. Santicizer 679 2. Santicizer 213 3. Aroelor 5442/5460 (30%) plus Santicizer 261 (70%-) for Aroelor 1248 replacement. 4. Aroelor 5442/5460 (52%) plus Santicizer 261 (48%) for Aroelor 1254 replacement. These products should have minimal softening or marring effect on acrylic enamels. The use of chlorinated terphenyls (Aroelor 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 Aroelor plasticizers. On a per pound basis, Santicizer 679 is cheaper than Aroelor 1248 or 1254. Santicizer 213 is cheaper than Aroelor 1248 or 1254 on a pound-volume basis, Santicizer 261/solid Aroelor blends compare favorably with Aroelor 1248 or 1254 on a pound-volume basis. Aroelor 5442 and 5460 can be very readily dissolved in Santicizer 261. 0ZlZ*00 ^ TOWOLDMON0025573 WATER_PCB-00010042 f) B. LIGHT CONSTRUCTION The most commonly used Aroclor plasticizers in building sealants are: Aroclor 1248, 1254, 1260 and 1262. Monsanto suggestions for replacements are: 1. Santicizer 261 2. Santicizer 148 3. Aroclor 5442 or 5460 blends with Santicizer 160 or 261. Sunticizer 263 An evaluation of Santicizer 261 versus Aroclor 1254 in polysulfide is shown in Tables 1 and 2. r ft) TOWOLDMON0025574 WATER_PCB-00010043 Table 1 SANTICIZER 261 VERSUS AROCLOR 1254 Molecular Weight Vap Press. (200 C) Viscosity (centisiokes) Weight/Gallon (LB 25 C) Santici2er261 368 1.00 mm. Hg. 78.3 (25 C) 8.9 Aroclor 1254 326 9.00 mm. Hg. 7.5 10.0 (100 C) 12.8 At 25 PHR <A> in LP-32/SRF at 30 PHR Wt. Loss (7 days at 100 C> < 15% - 25% At 40 PHR <B> jn LP-32/CaCO.^at 40 PHR Shore A %Wt. Loss 17 daysat 70 C) 12 1.9% 21 2.1% 100% Modulus (psil 100% Modulus (7 days in H20 at 70 Cl (psi) 40 33 41 38 Tensile Strength (psi) Tensile Strength (7 days in H20 at 70 C! (psi) % Elongation % Elongation (7 days in H20 at 70 C) (psi) 104 102 365 665 99 157 475 835 TOWOLDMON0025575 WATER_PCB-00010044 FORMULATION Table 2 COMPARISON OF SANTICIZER 261 VERSUS AROCLOR 1254 PHR A WEIGHT PHR Polysullide 111 SHF Carbon Black Uncoated CaCO^ Plasticizer 100 30 25 100 100 40 40 CATALYST SYSTEM Lead Dioxide Stearic Acid Plasticizer 50 5 45 15 50 5 45 Sulfur (1) Thiokol s LP 32 TOWOLDMON0025576 WATER_PCB-00010045 Santicizer 148 Santicizer 148 should give lower volatility in polysulfides than Aroelor 1254. It is lower in viscosity. Santicizer 148 Santicizer 261 Vapor Pressure mm. Hg. (200 C) 0.54 1.00 Viscosity Ceniistokes (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 148 is appreciably cheaper than Santicizer 278. Aroelor 5442/5460 Blends in Santicizer 160/261 Aroelor 5460 in blends with Santicizer 160 and 261 has been screened in a polysulfide formulation. Results are shown in Table 3. By using Aroelor 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 Aroelor 1248, 1254, 1260, 1262. Ways to do this are shown in Table 4. The solid Aroelor can be easily dissolved in Santicizer 160 or 261 by heating the blend. In the case of Aroelor 5442, a temperature of 50 C (122 F) should be adequate. o?^74' I TOWOLDMON0025577 WATER_PCB-00010046 Polysulfide (i) Filler Plasticizer Lead Dioxide Santicizer 160 Stearic Acid 100 ) ) 30 ) ) 25 ) 50 I 1 45 ) ) 5) Table 3 100 15 Plasticizer Aroclor 1254 Aroclor 1260 Aroclor 5460/Santicizer 160 (2/1) Aroclor 5460/Santicizer 261 (2/1) Aroclor 5460/Santicizer 261 (1/11 Initial Hardness (24 Hour Cure) Shore A 28 30 30 29-30 26-27 d * Thiokoi's LP-32 (2) Activated carbon method Volatility % Plasticizer Lost (1 Day/ 87 C)121 7.5 0212741 w| TOWOLDMON0025578 WATER_PCB-00010047 Table 4 Santicizer 261 Santicizer 160 ( Aroclor 1248 ( < Aroclor 1254 Viscosity (Centipoises) #6 HAT Brookfield at23C % Aroclor 5460 By Weight 33-1/3 50 67-2/3 670 - 9,700 440 - 4.000 300-400 cps ) 458,000 - 375,000 -w 12,000 cps ) 0112796 TOWOLDMON0025579 WATER_PCB-00010048 "Nothing tcmlilnid heinn Is to tie construed Rll IRKLO 10, no mi'tntw ol sellslectory n iKommandtllor lo use gny product in conflict with iny ts Irom relience upon contained inloimetion di recommen MONSANTO MAKES NO WARRANTIES AS TO MONSANTO COMPANY ORGANIC CHEMICALS DIVISION.100 No. Lindbergh Bird., SI Lgult, Mo. 6SI66 IITNESS OR Ml HONAN 1 ABILITY Of PRODIC1S Atnon, Ohio 44313 > 260 Springtide Dl. At unit, Gi. 303?6 3400 Peichlrae Rd. N.l. Boitor., Mm. 02l49.l*ei#ll Station Chtcigo, 111. 60018* 3i6B Del PHInit Av, Del Pieln.s, III. Cincinnati. Ohio 46206* 1601 Midlwn Rued Oelioll, Mich. 4B2J6* 600 Northland Towers Lest Honolulu. Heweli 96012 * 6T7 Ale Mosne tilvd. Houston, Tex. 77027 * 6061 Westheimer Rood Lot Angeles, cull. 90022* 6673 t. Flotilla St. NEW ENGLAND AREA Hydiocerbons A Polymeis Div. 710 Worcester St , Indian Orchenl, Miss. 01061 plastic Pioduels 6 Resins On. P. 0. Bo> 2130. Spilngtield, Mess. 0)101 Hew NoIK N. Y. 10017 * 277 Perk Awe. St. Louis. Mo. 62166* 800 N. Lindbergh Bind SAN FRANCISCO RAY AREA ?7)OLaleyetle, Santa Claie. Cell). 96062 Seattle. Wash. 9BI21 * 2112 Third Auenue Wilmington, Cel. 19803* 2005 Concord Pike, fi Monsanto TOWOLDMON0025580 WATER_PCB-00010049