Document Ne3jzjmRxnQX1wJm5bK2BqwXp

for Thiokol* polysulfide liquid polymers TECHNICAL BULLETIN No. PL-331 APRIL 1962 Monsanto! I_AL_ ST. LOUIS EG. MISSOURI 02*' TOWOLDMONOOQ5003 INTRODUCTION.... . Thiokol* polysulfide 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, ozone, and light), good electrical Insulation properties, resilience, impermeability to gases, and a broad servlet-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.......................... Joint-Sealant Compounds.......................... Casting Compounds..................................... Flexible Polysulfide-Epoxy Formulations Adhesives for Concrete.............................. .. 7 .. 7 .. 8 TECHNICAL BULLETINS ON MONSANTO MODIFIERS....................................................... g The information contained in thii bullatin ia. to our bait knowledge, trua and accurate, but ail recemmandationi or suggestions are made without guarantee, since the conditions of use ere beyond opr control. The Monsanto Chemical Company disclaims any liability incurred In connection with the vie of these data or suageitioni. Furthermore, nothing contained herein shail bo construed as a recommendation to use any product In conflict with esisting patents covering any material or its use. Thiokol; Registered trademark of the Thiokol Chemical Corp., Trenton, N. ). o WV6 02*' TOWOLDMONOOQ5004 MONSANTO MODIFIERS COMPATIBLE WITH POLYSULFIDES ' AROCLOR* Compound! 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 IS parts of Aroclor plasticixer for sealant compounds and a maximum of 40 parts for casting compounds. Liquid Aroclor compounds (such as Aroclor 124S) are used to give reduced casting vis cosity 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. Olbufyl Phthalafe 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-17 Santicizer M-17 glycolate plasticizer is frequently used to give improved tow-temperature characteristics in combination with the Aroclor compounds. Mod-Epox* Mod-Epox epoxy-resin modifier reduces viscosity of polysulfide-epoxy resin blends for easier handling and application; it also towers the overall cost. *Ar0Clor, HB-40. MoD'Epox, and Santicizer: Montanto Chemical Company trademark!, regittered in the U. S. Patent Office. I P" TOWOLDMONOOQ5005 PHYSICAL PROPERTIES OF MONSANTO POLYSULFIDE-MODIFIERS Property Molecular Weight. Refractive Index, 25C............................. Demlty, 25C, lb./gal.............................. Crystalling Point, C............................... Pour Point, C............................................ Bolling Point, 760 mm Hg, C................ Vapor Pronure, mm Hg 150"C ............................................ 200C ............................................ SOOC ............................................ Viieoilty, cs................................................. 0C 37.8C (100F)........................... 25C .............................................. 54.4C (130F)........................... 98.9C (210F) Surface Tension, 20 C, dynes/cm........ Hash Point, F........................................... Rre Point, F.............................................. Specification AROCLOR 1221 1.617-1.618 (20*C) 9.85 1 -- 275-320 -- -- -- -- *38-41 (SSU) -- 35-37 (SSU) 30-31 (SSU) -- 286-302 349 AROCLOR 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. Arocior 1254 1.639-1.641 (20*C) ' 12.82 10 365-390 Z0 1810-2500 (SSU) 2 S 0-340 (SSU) *14-48 (SSU) one to b.p. one to b.p. 2 022131* TOWOLDMONOOQ5006 AROCIOR 6440 -----1.640-1.665 ('C) 13.91 -- *98-105.5 (wfttnlng) 280-335 (5 mm Hf) oz -- -- -- 1-- -- none to b.p. none to b.p. HB-40 -- 1.5600-1.5750 8.37 -- --26 345-396 - Dibutyl PMhdlato 27834 1.4895-1.4915 8.72 < -35 --40 340.0 2 15 230 70.0 29.0 -- 341 40.1 (25C) 345 385 1 9 300 55.0 -- 15.6 2.4 35 340 395 Santicizer M-17 266.24 1.504 10.20 <-35 -26 310 0.5 8 600 1476 -- 82.0 241 43.6 <2SC) 380 -- MomEtox *1.581 1.590 m n (2j20C) I 02213X9 TOWOLDMONOOQ5007 MONSANTO SPECIFICATIONS j Appearance Aroclor 1221 {colorless mobile oil Acidity, meq. KOH/g__________ _____ Color, APBA. Moisture (KF in methanol), %............ Odor ........................................ ................. Specific Gravity, 2S8/25C.__________ { Net i specification 02)14 100 -- -- 1.182-1.192 (2S*C/13.5*C) AROCLOR 1242 practically colorless, dear, mobile on 0.010 100 50 (ppm) -- 1481-1.392 <257U.S*C) AROCLOR 1264 {tight-yellow viscous oil 02)10 100 1 0 (ppm) -- 1 '195-1.505 < r/t`C) 4 **13*o TOWOLDMONOOQ5008 0 ARQCIOR 1440 i dear, yellowj to-amber, ( brittle rain | or flakes j f0.05 | I (NPA) t __- fl.670 i HB-40 Dibutyl ' Phthatate Santicizer M-17 tpractically colorless, oily liquid clear, water-white oily liquid with no sediment or turbidity dear, practically white, oily liquid, with no turbidity or sediment -- ISO 125 (ppm) fFaint, Characteristic 1.001-1.007 (JSVU.S'O) 0.12 20 0.15 Slight, Characteristic 1.044-1.048 0.33 20 0.15 Slight, Characteristic 1.217-1.227 Mooitox oily {liquid or light)--:yellow solid 0.2 (mi KOH/g) 1.170 -1.183 <ovi 1.5*0 I0 on l 121 TOWOLDMONOOQ5009 1" POLYSULFIDE APPLICATIONS ' Joint-Sealant Compounds . Curtain-wall construction, which is growing rapidly, requires large quantities of permanently flexible, strongly adhering sealants. The Axoclox 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 Axoclox 1232 in a joint-sealer formulation: JOINT-SEALANT COMPOUND FOR CURTAIN-WALL CONSTRUCTION ; Ingredients Peris by Weight Tkiokol LP-32 polysulfide Phenolic resin Axoclox 1232 Calcium carbonate Titanium dioxide | Stearic acid Sulfur 100 5 MS 40 10 1 0.1 ' C-S paste (lead peroxide, 50%; dibutyl ; phthalate, 45%; stearic acid, 5%: ' passed three times through a tight paint mill.) w ; | | ! 1 i 1 {. f Properties Cast sheets, after cure of 7 days at room temperature: Tensile strength, psi Elongation, % Hardness, Shore "A" 150-250 500-700 30-40 0221322 TOWOLDMONOOQ5010 Catting Compounds Solvent-resistant gaskets of polysulflde polymers may be poured and cured in-place. Either dlbutyl phlhalate or Aroclor 1248 may be used to modify polysulfide casting compounds, as exemplified by the following starting formulation: Ingredients ' Thlokol LP-2 polysulfide Dibutyl 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, % 300-400 Hardness, Shore "A" 25-35 Flexible Polysulfide-Epoxy Formuletions 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 o( 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 Ingredients Thlokol LP-3 Epon* 828 epoxy resin Mod-Epox Diethylenetriamine Parts by Weight 100 100 100 100 -- 25 12 8 Properties After cure at 23C for: 10 days 10 weeks *Regirtered trademark of Shell Chemical Co. Hardness, Rockwell --69R --3SR --79R --32R 7 0221323 TOWOLDMONOOQ5011 Adhastves for Concrete Formulations based on polysulfide liquid polymers and epoxy resins, and modified with Aaocuta 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 wefl as metal parts to concrete. As concrete sealers, they speed hardening, curing, and dustproofing of fresh concrete; and they resist freeze-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 polysulfide 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 Akoclok Plasticizers HB-40 Dibutyl Phthalate Santicizex M-17 Mod-Epox WFWilSS-I.SkM*} c o TOWOLDMONOOQ5012 ST. 10UIS 66. MISSOURI AKRON ATLANTA BOSTON CHICAGO CINCINNATI CLEVELAND DETROIT HOUSTON LOS ANGELES MINNEAPOLIS NEW YORK PITTSBURGH SAN FRANCISCO SEATTLE SYRACU5E WILMINGTON MONSANTO CHEMl London j MONSANTO CHEm| Gals (AUSTRALIA) LTD. lilbourne MONSANTO (CAN DA) LTD. Mentrant Toronto 4ncow*r 022'* TOWOLDMONOOQ5013