Document gbBZvp15j4GR1KJkk9EBaJ8ON

( I o TOWOLDMON0025983 WATER_PCB-00010452 INTRODUCTION Thiokol* polysuUide liquid polymers, essentially difunctional mercaptans, are easily converted in-place to rubber-like materials. Cured polysulfide-based compounds are noted for their out standing oil and solvent resistance, excellent resistance to weathering (oxygen, osone, and light), good electrical Insulation properties, resilience, impermeability to gases, and a broad service-temperature range (from --55 to 175C)- They are used in potting and casting com pounds, sealants, adhesives, coatings, and in combinations with epoxy and phenolic resins. The choice of materials and concentrations used in formulating finished compounds depends upon the requirements of the application. The purpose of this bulletin is to discuss several Monsanto modifiers that enable the formulator to reduce the cost of polysulfide-based com pounds without detracting appreciably from the useful characteristics of these compounds. We acknowledge, with thanks, the cooperation of the Thiokol Chemical Corp. in the prepara tion of this bulletin. CONTENTS MONSANTO MODIFIERS COMPATIBLE WITH POLYSULFIDES.................................... 1 PHYSICAL PROPERTIES OF MONSANTO MODIFIERS.............. ....................................... 2 MONSANTO SPECIFICATIONS .......................................................................... 4 POLYSULFIDE APPLICATIONS............................................. 6 Joint-Sealant Compounds.................................................................................................... 6 Casting Compounds.............................................................................................................. 7 Flexible Polysulfide-Epoxy Formulations.................................................................... 7 Adhesives for Concrete.......................................................................................................... 8 TECHNICAL BULLETINS ON MONSANTO MODIFIERS................. 8 Ttw Information contained in this bulletin ia. to our bait knowledge true and accurate, but etl re commendations or suggestions ere made without guarantee, tine* the conditions of use art bevond V' control Tha Monsanto Chemical Company disclaims any liability incurred In connection with the via of thasa data or suageitions. Furthermore, nothing contained herein shall be construed as a recommendation to use any product in conflict with existing patents covering any material or its use. Thiokol: Registered trademark of the Thiokol Chemical Corp., Trenton, N. J. o 02*1 sn TOWOLDMON0025984 WATER_PCB-00010453 MONSANTO MODIFIERS COMPATIBLE WITH POLYSULFIDES * AfcOClOft* Compounds The Aroclor chlorinated biphenyls and terphenyls are highly compatible with polysulfide liquid polymers and offer an attractive means of reducing formulation costs. Although the Aroclor compounds are compatible up to 100 PHR, the concentration to be used depends upon the handling and performance properties required in the finished com* pound. The formulations shown in this bulletin suggest a maximum of 15 parts of Aroclor plasticizer for sealant compounds and a maximum of 40 parts for casting compounds. Liquid Aroclor compounds (such as Aroclor 1248) are used to give reduced casting via* cosily and higher filler levels, whereas the resinous and solid Aroclor compounds (such as Aroclor 5460) are useful where low volatility is desired. The 12 available Aroclor compounds offer a range of physical properties. HB-40* HB-40 hydrocarbon plasticizer is compatible with polysulfide liquid polymers up to 40 PHR. Like the Aroclor compounds, HB-40 offers reduced viscosity in formulation plus reduced costs. Dibutyl Phthalafa Dlbutyl Phthalate is also compatible up to 40 PHR and Is used both as a plasticizer and as a grinding medium for the peroxide curing agents. SANTICIZER* M*I7 Santicizer M*17 glycolate plasticizer is frequently used to give improved low*temperature characteristics in combination with the Aroclor compounds. MOD'EPOX* Moo-Epox epoxy-resin modifier reduces viscosity of poiysutfide-epoxy resin blends for easier handling and application; it also lowers the overall cost. 'Aroclor, HB'40, Mod Epox, end Santicizer: Monsanto Chemical Company trademark#, registered in the U. S, Patent Office. I TOWOLDMON0025985 WATER_PCB-00010454 PHYSICAL PROPERTIES OF MONSANTO POIYSULFIDE-MODIFIERS j Property ' Molecular Weight.................................... Refractive Index, 25C........ _................ Density, 25C, lb./gal............................. Crystellltlng Point, C...................-........ Pour Point, C.......................................... tolling Point, 760 nun Hg, C................ Vepor Prenuro, mm Hg ISDC -........................................ iooc... .................... 300C .......................................... Viicoiity, cs........................................... .... 0C ............................................ 37.8"C (100F).......................... 2SC ....................................... ..... 54,4C (130F).......................... 98.9C (210F)______________ Surface Tension, 20 C, dynes/cm....... Hath Point, F.......................................... Fire Point, F............................................ 'Specification AXOCLOR 1221 1.617-1.618 (20*C) 9.85 1 -- 275-320 *38-41 (SSU) 35-37 (SSU) 30-31 (SSU) 286-302 349 AXOCLOR 1242 1.627-1.629 (20*C) 11.50 -- -19 325-366 *82-92 (SSU) 49-56 (SSU) 34-35 (SSU) 348-356 none to b.p. Axociox 1254 1.6)9-1.641 (20*C) ` 12.82 10 365-390 Z0 1800-2500 (SSU) 340 t48 (SSU) (SSU) none to b.p. none to b.p. 0221310 | TOWOLDMON0025986 WATER_PCB-00010455 1. Aftoeio* 5460 -- 1.660-1.665 (10'C) 13.91 -- *93-105.5 (nftnJni) ! 280-335 !t (S mm H|) i j 0" !-- f 1 '-- x-- *-- -- ; ------3 BOM to bp. BOM to bp. HB-40 - -- 1.5600-1.5750 8.37 -- --26 345-396 - Dlbutyl PMhaloto 278J4 1.4895-1.4915 8.72 < -35 --40 340.0 2 15 230 703) 293) -- -- 3.8 40.1 (25C) 345 385 1 9 300 55.0 -- 15.6 --- 2.4 35 340 395 Santicizk M-17 266.24 1.504 10.20 < -35 -26 310 0.5 8 600 1476 -- 82.0 -- 23) 43.6 (25C) 380 Moo fOX *1.581 1.590 93 1; 3) 11 (2 D*C) --35 55 ! 1 0**1319 TOWOLDMON0025987 WATER_PCB-00010456 MONSANTO SPECIFICATIONS.. j Appearane* Arocior 1221 fcolorless mobile oil Acidity, meq. KOH/g_______________ Color, APHA.___________________ ___ Molitur* (KF in methanol), %............ Odor .......................................... -........... Specific Gravity. 2S/25C.................... f Not a spaelilcation 02)14 100 -- -- 1.182-1.192 <2S*C/IS.5'C) AROCIOR 1242 practically colorless, dear, mobile on 02)10 100 50 (ppm) -- 1J81-1.392 CISVIWC) Aroclor I2S4 TOght-ytllow Macous oil 0.010 100 W (PP") [49S-1.50S /15.5'C) t TOWOLDMON0025988 WATER_PCB-00010457 JUtOClOK MM dear, yellow1 to-amber, ( brittle min j or flake* to.os 1 (NFA) ft .670 (t HB-40 ^practically colorless, oily liquid 150 125 (ppm) fFalnt, Cbaracteristic 1.001-1.007 (JS715.J-C) Dibiiiyl Phthalat* Santicizer M-l 7 dear, water-white oily liquid with no sediment or turbidity dear, practically white, oily liquid, with no turbidity or sediment 0.12 20 0.15 Slight, Characteristic 1.044-1.048 0.33 20 0.15 Slight, Characteristic 1.217-1.227 MOD-El oily {liquid or Ugh*yellow solid 0.2 (mg KOH/g) SO 1.1 mi..183 OOVi .5*0 I0 0221 21 TOWOLDMON0025989 WATER_PCB-00010458 POLYSULFIDE APPLICATIONS j Jotnt-SUnt Compounds ^ Curtain-wall construction, which is growing rapidly, requires large quantities of permanently flexible, strongly adhering sealants. The Axoclor compounds have long been used as costreducing modifiers for polysulfide polymers in this and other construction applications. Seal ant compounds are also widely used to seal concrete joints in airport runways and to impart skid-resistant surfaces by bonding abrasive particles to highways and bridges. The following formulation illustrates the use of Axoclok 1232 in a joint-sealer formulation: JOINT-SEALANT COMPOUND FOR CURTAIN-WALL CONSTRUCTION Ingredients Parts by Weight Tkiokol LP-32 polysulfide Phenolic resin Asoclor 1232 Calcium carbonate Titanium dioxide Stearic acid Sulfur 100 S 5-15 40 10 1 0.1 C-S paste (lead peroxide, SO%; dlbutyl phthalate, 45%; stearic acid, 5%: passed three times through a tight paint mill.) Properties Cast sheets, after cure of 7 days at room temperature: Tensile strength, psi Elongation, % 3, Hardness, Shore "A" !6 i i i 150-250 500-700 30-40 TOWOLDMON0025990 WATER_PCB-00010459 Catting Compounds Solvent-resistant gaskets of polysulfide polymers may be poured and cured in-place. Either dibutyl phthalate or Aroclor 1248 may be used to modify polysulfide casting compounds, as exemplified by the following starting formulation: Ingredient* * TMokol LP-2 polysulfide Dlbutyl phthalate (or Aroclor 1248) Zinc sulfide Sulfur C*5 paste (See previous formulation) Parts by Weight 100 20*40 40 0.1 15 Properties Cast sheets, after cure of 7 days at room temperature: Tensile strength, psi 150*200 Elongation, % 500-400 Hardness, Shore "A" 25-55 Flexible Polyiulfide-Epory Formulation* Epoxy resins are made flexible by modification with about equal amounts of polysulfide resins. The viscosity of the resulting formulation is markedly decreased, for easier handling and ap plication, by incorporation of Mod-Epox, which also permits the use of less.epoxy curing agent, reduces the overall cost, increases bond strength, yet has very little effect on aging, as indicated by the following formulations: ROOM-TEMPERATURE AGING OF FLEXIBLE POLYSULFIDE-EPOXY FORMULATIONS In9r.di.nh Tkk>kol LP-3 Epon* 828 .poxy resin Mod-Epox Dietbylenetriunine P.rts by Weight 100 100 100 100 -- 25 12 8 Properties After cure at 2JC for: 10 days 10 weeks *Rcgiittred trademark of Shell Chemical Co. Hardness, Rockwell --69R --35R --7SR - -J2R 0221323 TOWOLDMON0025991 WATER_PCB-00010460 Adhatlvat for ConcroH Formulations based on polysulfide liquid polymers and epoxy resins, and modified with Akoclor compounds or Mod-Epox, are frequently used as adhesives for concrete. These ad hesives are excellent for repairing and patching concrete floors and highways, and they permit fresh concrete to be bonded to old concrete. They are also used to bond pre-cast or broken concrete parts together, as well as metal parts to concrete. As concrete sealers, they speed hardening, curing, and dustproofing of fresh concrete; and they resist freexe-thaw, salt, and scraper damage to highways. TECHNICAL BULLETINS ON MONSANTO MODIFIERS Complete details of the properties, applications, and performance of the Monsanto modifiers for polyniifide liquid polymers are included in the following technical bulletins, which are available without obligation from Monsanto's Organic Chemicals Division, in St. Louis, or from any Dis trict Sales Office: Number PL-306 PL-40 PL-302 PL-17 PL-313 Title The Asoclor Plasticizers HB-40 Dibutyl Pbthaiate Santicizer M-17 Mod-Evox WFW:l5S.|.SM*<:i2 0 Io 0221V II I TOWOLDMON0025992 WATER_PCB-00010461 WATER_PCB-00010462