Document a42nYExxmy5Ob8J816zXv5EE9

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. - DSW 586612 STLCOPCB4091946  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. A < DSW 586613 STLCOPCB4091947 Table 1 SAIMTICIZER 261 VERSUS AROCLOR 1254 Molecular Weight Vap. Press. (200 C) Viscosity (centistokes) Weight/Gallon (LB 25 C) Santicizer261 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> in LP-32/CaC03 at 40 PHR Shore A % Wt. Loss (7 days at 70 C) 12 1.9% 21 2.1% 100% Modulus (psi) 100% Modulus (7 days in H2O at 70 C) (psi) 40 33 41 38 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 DSW 586614 STLCOPCB4091948 Table 2 FORMULATION Polysulfide (1) COMPARISON OF SANTICIZER 261 VERSUS AROCLOR 1254 PHR A WEIGHT PHR 100 100 SRF Carbon Black 30 100 - Uncoated CaCO^ - 40 Plasticizer 25 40 B WEIGHT 100 CATALYST SYSTEM Lead Dioxide Stearic Acid Plasticizer 50 5 45 15 50 5 15 45 Sulfur - - - 0.1 (1) Thiokol's LP-32 DSW 586615 i STLCOPCB4091949 \9 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 (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. 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. DSW 586616 STLCOPCB4091950 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 (1/1) Initial Hardness (24 Hour Cure) Shore A 28 30 30 29-30 26-27 C" Thiokol's LP-32 (2) Activated carbon method Volatility % Plasticizer Lost (1 Day/ 87 C) <2> 7.5 4.7 4.5 4.0 4.5 DSW 586617 STLCOPCB4091951 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 -- 458,000 ~ 440 ~ 4,000 -~ 375,000 300-400 cps ) ) 12,000 cps ) I 11 DSW 586618 STLCOPCB4091952 / "Nothing contained herein is to be construed as a recommendation to use any product in conflict with any patent. MONSANTO MAKES NO WARRANTIES AS TO THE FITNESS OR MERCHANTABILITY OF ANY PRODUCTS REFERRED TO, no guarantee ot satisfactory results from reliance.upon contained information or recommendations, and disclaims all liability for any resulting loss or damage.'' MONSANTO COMPANY * ORGANIC CHEMICALS DIVISION *100 No. Lindbergh Blvd., SL Louis, Mo. B3166 Akron, Ohio 44313 260 Springside Dr. Atlanta, Ga. 30326 * 3400 Peachtree Rd., N.E. Boston, Mass. 02149* Everett Station Chicago, III. 60018* 3158 Des Plaines Ave., Des Plaines, III. Cincinnati, Ohio 45206* 1501 Madison Road Detroit, Mich. 48235 * 500 Northland Towers East Honolulu, Hawaii 96812 677 Ala Moana Blvd. Houston, Tex. 77027 5051 Westheimer Road Los Angeles. Catit. 90022 * 6670 E. flotilla SI. NEW ENGLAND AREA Hydrocarbons & Polymers Div. 730 Worcester St., Indian Orchard, Mass. 01051 Plastic Products & Resins Div. P. O. Box 2130, Springfield, Mass. 01101 New York, N. Y. 10017* 277 Park Ave. St Louis, Mo. 63166 * 800 N. Lindbergh Blvd. SAN FRANCISCO BAY AREA 2710 Lafayette, Santa Clara, Catif.95052 Seattle, Wash. 98121 2112 Third Avenue Wilmington, Del. 19803 * 2005 Concord Pike, Fairfax t}- I Monsanto DSW 586619 L. 9-^ftCQ ACTA C I ITUA IM I I e /\ STLCOPCB4091953