Document ZJ5NOEMZK5VmmMG49jobzb2ML

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 5442/6460 (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. 0621694 | TOWOLDMON0039568 WATER_PCB-00024037 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. Santicizer 261 An evaluation of Santicizer 261 versus Aroclor 1254 in polysulfide is shown in Tables 1 and 2. 0621695 | TOWOLDMON0039569 WATER_PCB-00024038 Table 1 SANTICIZER 261 VERSUS AR0CL0R1254 Molecular Weight Vap. Press. 1200 Cl Viscosity (centistokes} Weight/Gallon (LB 25 Cl $anticizer261 368 1.00 mm. Hg. 78.3 (26 C) 8.9 Aroclor1254 326 9.00 mm. Hg. 7.6-10.0 (100 C) 12.8 At 25 PHR <A) in LP-32/SRF at 30 PHR Wi. Loss (7 days at 100 C) <15% ~ 25% At 40 PHR <B> m LP-32/CaCO.t at 40 PHR Shore A %Wt. Loss (7 davs Bt 70 Cl 12 1.9% 21 2.1% 100% Modulus Ipsi) 100% Modulus 17 days in H2O at 70 Cl Ipsi) 40 33 41 3B Tensile Strength (psi) Tensile Strength (7 days in H2O at 70 C) (psi) 104 102 99 157 % Elongation % Elongation (7 days in H20 at 70 C) (psi) 365 665 475 835 0621&96 TOWOLDMON0039570 WATER_PCB-00024039 FORMULATION PolysuKide ^ SRF Carbon Black Uncoated CaCO^ Plasticizer COMPARISON OF SANTICIZER 261 VERSUS AROCLOR 1254 PHR A WEIGHT too PHR 100 30 100 25 40 40 bweight 100 CATALYST SYSTEM Lead Dioxide Stearic Acid Plasticizer 60 5 45 15 50 5 16 45 Sulfur - - - 0.1 Thiokol's LP-32 WATER_PCB-00024040 Santicizer 148 Santicizer 148 should give lower volatility in polysulfides than Aroclor 1254. It is lower in viscosity. Santicizer 148 Santicizer 261 Vapor Pressure mm. Hg. (200 C) 0.54 1.00 Viscosity Centistokes (26 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. Aroclor 5442/5460 Blends in Santicizer 160/261 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. 0621698 | TOWOLDMON0039572 WATER_PCB-00024041 Polysulfide ^ Filler Plasticizer Lead Dioxide Santicizer 160 Stearic Acid 100 ) ) 30 ) ) 25 } 50 ) > 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 11/1) Initial Hardness (24 Hour Cure) Shore A 28 30 29-30 26-27 Thiokol's LP-32 *2) Activated carbon method Volatility % Plasticizer Lost (1 Day/ 87Q C) (2) 7.5 4.7 4.5 4.0 4.5 Ob2l<>99 ^ | TOWOLDMON0039573 WATER_PCB-00024042 Table 4 Santicizer 261 Santicizer 160 ( Aroclor 1248 ( ( Aroclor 1254 Viscosity (Centipoises) #6 HAT Brookfield at23C 14 Aroclor 6460 By Weight 33-1/3 50 67-2/3 670 - 9,700 ~ 458,000 ~ 440 ~ 4,000 ~ 375,000 : 300-400 cps ) I : ~ 12,000 cps ) l 0621700 I '.,..1. ....... TOWOLDMON0039574 WATER_PCB-00024043 "Hettitm wnlllntd tof*lnlilob eMllu*< I r*mm*ndtk>n to uti *ny prodiKl In tonflicl with ny peltnt. MONSANTO MAKES NO WARRANTIES AS TO THE FITNESS OR MERCHANTABILITY Of ANT PRODUCTS REFERRED TO, w inrinlMOl ntlitsctory iniiU Irom rilUnci.upon conttlntd Inlormtllon #r racommtfldallont, nd diaclalmt all llibliliv lor tny rtiuitinc bn i dimut." MONIANfO COMPANY OR0ANIO OHIMIOALS DIVISION. MO N. UaMargh 61.(1., $t Laiils, Ms. MIN Akrtn, Ohto U313 MO Sprlnnlde Di. AlMnU, fit. ROM. MOOPaKhtra* Rd.,N.E MUD, MW. OM5* Iwttt AUUOt Odkaio, III. M0II 1)66 Dm PUInn Ay*., Dtl PUInn, III. ttndnMlI.Ooie 65206* 1501 MidHon R0 tot*It. Mleh. 2. 500 NcrlhUnd town* toil dUnekik Htwtll Milt * 67? AU Mmm Blvd. Hovilon, Tax. 77027 > 5051 Wsithtlmtf told In Austin, 0*111. K022* 6670 E. FtotllU St. MEW ENW.AND AREA Hjrdrocirbont A Pclymtrt Div. 730 Worcultr 81.. Indian Orchard, Miu. 01051 Rustic Product* 6 toilet Div. P. 0. hot 2130, BprinifUM, Mui. 01101 Hw York. N. Y. 10017* 277 Park Av*. St. Louis, Mo. 63166* 800 N. Llndbarih Blvd. SMt FRANCISCO 5AY AREA 2710 LafayiUt, S*nU Clara, Calif. 55052 Saatlla, Wa*l>. 88121 2112 Third Avtnue Wllmlri|1oii, Dtl. 18803* 2005 Ctncord Pike, Filin Monsanto v.anft't.n*7n.fi i ,tho in us a 0621701 .. ....,. H TOWOLDMON0039575 WATER_PCB-00024044