MillathaneÂ® 76 Datasheet - TSE Industries, Inc.

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EFFECT OF ZINC STEARATEZinc stearate has replaced cadmium stearate due to toxicityconcerns with cadmium compounds.■ Used as a coactivator with Thanecure ® ZM it shortenscure times and improves compression set.■ The most useful range of zinc stearate is between 0.25 phrand 0.75 phr with 0.5 phr as optimum.■ Zinc stearate also functions as a process aid and releaseagent, and helps prevent sticking to mill or internal mixersurfaces.EFFECT OF ZINC STEARATE ON RATE OF CURETorqueinch lbs.155°C (311°F)1000.5 phr1.25 phr500 phr00 6 12 18 24Time [minutes]EFFECT OF ZINC STEARATE ON PHYSICAL PROPERTIESParts Zinc Stearate 0.0 0.25 0.5 0.75 1.25Hardness, Durometer A 70 70 70 71 70100% Modulus, psi 600 614 585 524 525MPa 4.1 4.2 4.0 3.6 3.6200% Modulus, psi 1407 1412 1390 1181 1203MPa 9.7 9.7 9.6 8.1 8.3300% Modulus, psi 2451 2419 2310 2069 2094MPa 16.9 16.7 15.9 14.3 14.4Tensile Strength, psi 4860 4912 4790 4731 4675MPa 33.5 33.9 33.0 32.6 32.2Elongation, % 540 559 565 559 555Tear Strength, Die C, pli 356 343 363 372 374kN/m 62.3 60.0 63.6 65.1 65.5Compression Set, (22 hrs. @ 70° C [158°F]), % 33.8 34.6 32.5 31.4 29.6Cure Time @ 155°C (311°F), TC90, min. 14.1 8.4 8.0 8.0 10.4TSE INDUSTRIES, INC. (800) 237-7634 MILLATHANE 76 7/04 pg. 7
PEROXIDE CURING SYSTEMCuring of Millathane ® 76 can easily be done with manytypes of peroxides. Millathane76 peroxide vulcanizateshave superior compression set, greater heat stability, andare more resistant to reversion than sulfur cures.EFFECT OF PEROXIDE CONCENTRATIONIncreasing the peroxide concentration has a dramatic effecton the physical properties of Millathane76.■ Millathane76, when cured with 3 phr of Di-Cup 40C(40% dicumyl peroxide), produces excellent physicalproperties that meet or exceed ASTM D2000 BG■■■specifications.When curing it at levels higher than 3 phr — modulus,hardness, and compression set resistance INCREASE —but processing safety, tensile, elongation, and tearstrength DECREASE.Moreover, curing Millathane76 with 2 phr of Di-Cup 40Cwill result in very satisfactory vulcanizates — with lowermodulus, high tear strength, higher elongation, and goodcompression set.NOTE — (1) when using black or non-black fillers, thecloser that compound is to a pure gum the less peroxideis required. And (2) when using peroxides other thandicumyl peroxide it's wise to evaluate a few differentlevels to determine the optimum concentration.Millathane76 can also be cured with other commerciallyavailable peroxides such as the following:Varox DBPH-50 —45% 2,5-dimethyl-2,5-di (t-butylperoxy) hexaneVul-Cup 40KE—40% 2,2’-di (t-butylperoxy) diisopropylbenzeneLuperco 130XL —45% 2,5-dimethyl-2,5-di (t-butylperoxy) hexyne-3COMPARISON OF PEROXIDESDi-Cup Varox Vul-Cup LupercoPEROXIDES 40C DBPH-50 40KE 130XLPeroxides, phr 3.0 2.5 2.5 3.0Millathane76 100.0 100.0 100.0 100.0Stearic acid 0.25 0.25 0.25 0.25Poly AC 617A 0.5 0.5 0.5 0.5N-550 35.0 35.0 35.0 35.0TP-95 3.0 3.0 3.0 3.0PHYSICAL PROPERTIESCure time @ 182°C (360°F) 5’ 7’ 7’ 12’Hardness, Durometer A 66 66 64 66100% Modulus, psi 587 684 641 654MPa 4.1 4.7 4.4 4.5200% Modulus, psi 1979 2250 2104 2221MPa 13.6 15.5 14.5 15.3300% Modulus, psi —— —— 3410 3579MPa —— —— 23.5 24.7Tensile strength,psi 3305 3501 3825 3596MPa 22.8 24.1 26.4 24.8Elongation, % 296 289 340 300Tear strength, Die C,pli 299 291 337 286kN/m 52.4 51.0 59.0 50.1Compression set 24.0% 28.2% 25.9% 25.7%22 hours @ 100°C (212°F)HEAT AGED 70 HOURS @ 100°C (212°F)Hardness, points change +4 +4 +4 +4Change in tensile ,% +20.7 +12.3 – 0.6 +1.2MPa 27.5 27.1 26.2 25.1Change in elongation, % –13.4 – 6.9 –16.8 –18.0EFFECT OF PEROXIDE CONCENTRATION ON MILLATHANE 76FORMULATIONMillathane 76 100.0 100.0 100.0 100.0 100.0Stearic Acid 0.5 0.5 0.5 0.5 0.5N-220 Black 20.0 20.0 20.0 20.0 20.0Di-Cup 40C 1.0 2.0 3.0 4.0 5.0Cure 15’ @ 160°C (320°F)PHYSICAL PROPERTIESHardness, Durometer A 60 60 65 68 70100% Modulus, psi 181 278 405 676 815MPa 1.3 1.9 2.8 4.7 5.6200% Modulus, psi 325 764 1393 2504 ––MPa 2.2 5.3 9.6 17.3 ––300% Modulus, psi 667 1757 3045 –– ––MPa 4.6 1.2 2.1 –– ––Tensile Strength, psi 3211 4141 4234 4384 2955MPa 22.1 28.6 29.2 30.2 20.4Elongation, % 659 475 367 277 194Tear strength, Die C, pli 233 335 333 341 245KN/m 40.8 58.7 58.3 59.7 42.9Compression Set, 22 Hrs. @ 100°C (212°F), % 44 29 22 17 16pg. 8 MILLATHANE 76 7/04 (800) 237-7634 TSE INDUSTRIES, INC.
Page 1 and 2: Millathane76®A MILLABLE POLYESTER
Page 3 and 4: TABLE OF CONTENTSGENERAL DESCRIPTIO
Page 5 and 6: SULFUR CURING SYSTEM■■■■VUL
Page 7: EFFECT OF MBTS AND MBTThe combinati
Page 11 and 12: COMPRESSION ANDTRANSFER MOLDINGProp
Page 13 and 14: EVALUATION OF PLASTICIZERSPlasticiz
Page 15 and 16: FORMULATIONS FORVARIOUS HARDNESSThe
Page 17 and 18: 90 DUROMETERNON-BLACK SULFUR CUREFO
Page 19 and 20: NON-BLACK LOADING STUDIESSome impor
Page 21 and 22: VULCANIZATE PROPERTIESMillathane ®
Page 23 and 24: MILLATHANE ® 76 COMPARISONWITH NIT
Page 25 and 26: GLOSSARYAkrofax 11LG vulcanized veg
Page 27: Millathane® 76Millathane® 76Milla

MillathaneÂ® 76 Datasheet - TSE Industries, Inc.

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