Volume 4 - Loctite.ph

More documents

Recommendations

Info

Polyurethane (PU)ThermoplasticTrade Names• Bayflex• Estane• Isoplast• Mor-Thane• Neuthane• Pellethane• Tecoflex• Tecothane• TexinManufacturerBayer CorporationB. F. Goodrich ChemicalDow ChemicalMortonNew England UrethaneDow ChemicalThermedics Inc.Thermedics Inc.Bayer CorporationGeneral DescriptionPolyurethanes are produced by the condensation reaction of anisocyanate and a material with a hydroxyl functionality, such as apolyol. PU can have the chemical structure of either a thermoplastic orthermoset and can have the physical structure of a rigid solid, a softelastomer, or a foam. The chemical composition of PU can also varywidely, depending on the specific polyol and isocyanate bearingspecies which are reacted to form the PU. The many different chemicalstructures and physical forms possible for PU make it a versatile,widely used polymer. Specialty grades available include flameretardant, clay, silica, and glass filled. In 2004, the price of PU rangedapproximately from $1.20 to $6.50 per pound at truckload quantities.General PropertiesThe major benefits offered by PU are that it retains its high impactstrength at low temperatures, it is readily foamable, and it is resistantto abrasion, tear propagation, ozone, oxidation, fungus, and humidity.Although thermoplastic PU is attacked by steam, fuels, ketones, estersand strong acids and bases, it is resistant to aliphatic hydrocarbonsand dilute acids and bases. The highest recommended usetemperature of thermoplastic PU is approximately 220°F (104°C),rendering it inappropriate for most high temperature applications.Furthermore, thermoplastic PU has poor weatherability stemming fromits poor resistance to UV degradation. Since PU can be painted withflexible PU paints without pretreatment, it has found use in manyautomotive exterior parts.Typical Properties of Polyurethane (PU)American EngineeringProcessing Temperature 385°F to 450°F 196°C to 232°CLinear Mold Shrinkage 0.004 to 0.014 in./in. 0.004 to 0.014 cm/cmMelting Point 400°F to 450°F 204°C to 232°CDensity 69.9 to 77.4 lb./ft. 3 1.12 to 1.24 g/cm 3Tensile Strength, Yield 4.9 to 35.0 lb./in. 2 x 10 3 3.4 to 24.6 kg/cm 2 x 10 2Tensile Strength, Break 4.9 to 35.0 lb./in. 2 x 10 3 3.4 to 24.6 kg/cm 2 x 10 2Elongation, Break 100 to 500% 100 to 500%Tensile Modulus 0.6 to 45.0 lb./in. 2 x 10 5 0.4 to 31.6 kg/cm 2 x 10 4Flexural Strength, Yield 6.0 to 60.0 lb./in. 2 x 10 3 4.2 to 42.2 kg/cm 2 x 10 2Flexural Modulus 0.1 to 0.4 lb./in. 2 x 10 5 0.0 to 0.2 kg/cm 2 x 10 4Compressive Strength 1.2 to 29.5 lb./in. 2 x 10 3 0.8 to 20.7 kg/cm 2 x 10 2Izod Notched, R.T. 1.5 to (No Break) ft.-lb./in. 8.1 to (No Break) kg cm/cmHardness A55 - A95 Rockwell A55 - A95 RockwellThermal Conductivity 1.7 to 2.3 BTU-in./hr.-ft. 2 -°F 0.25 to 0.33 W/m-°KLinear ThermalExpansionDeflection Temperature@ 264 psiDeflection Temperature@ 66 psiContinuousService Temperature1.8 to 8.4 in./in.-°F x 10 -5 3.2 to 15.1 cm/cm-°C x10 -5SI100°F to 330°F 38°C to 166°C115°F to 370°F 46°C to 188°C180°F to 220°F 82°C to 104°CDielectric Strength 430 to 730 V/10 -3 in. 1.7 to 2.9 V/mm x 10 4Dielectric Constant@ 1 MHzDissipation Factor@ 1 MHzWater Absorption,24 hr.4.4 to 5.1 4.4 to 5.10.060 to 0.100 0.060 to 0.1000.10 to 0.60% 0.10 to 0.60%Typical Applications• Automotive – Fascias, padding, seats, gaskets,body panels, bumpers• Medical – Implantable devices, tubing,blood bags, dialysis membrane• Machinery – Bearings, nuts, wheels, seals, tubing• Consumer – Furniture padding, mattress goods,roller skate wheels, athletic shoes66The Loctite ® Design Guide for Bonding Plastics, Volume 4
ADHESIVE SHEAR STRENGTH(psi)(MPa)PolyurethaneUNFILLED RESIN(SHORE D)14 rmsROUGHENED167 rmsUV STABILIZER1% Tinuvin 328FLAME RETARDANT15% BT-932% Antimony OxidePLASTICIZER13% TP-95LUBRICANT #10.5% Mold Wiz INT-33PALUBRICANT #20.5% FS1235 SiliconeUNFILLED RESIN(SHORE A)Estrane 58630B.F. GoodrichLoctite ® 380 Black Max ® Instant Adhesive,Rubber Toughened2001.43502.41000.72001.4500.32001.44503.12001.4Loctite ® 401 Prism ® Instant Adhesive,Surface InsensitiveMEDICAL: Loctite ® 4011 Prism ®Instant Adhesive, Surface Insensitive3502.413509.32001.44503.11501.08005.5>2250 † >850 †>15.5 † >5.9 †Loctite ® 401 Prism ®Loctite ® 770 Prism ® PrimerMEDICAL: Loctite ® 4011 Prism ® /Loctite ® 7701 Prism ® Primer14009.7195013.59506.6>1850 † >750 † >2150 † >2900 † >1300 †>12.8 † >5.2 † >14.8 † >20.0 † >9.0 †Loctite ® 414 Super Bonder ®Instant Adhesive, General Purpose3502.413009.01501.06004.11501.07004.812508.65503.8Loctite ® 330 Depend ® Adhesive,Two-Part No-Mix Acrylic3502.4150010.33502.4>1400 †>9.7 † 2001.49006.2>2650 † 450>18.3 † 3.1Loctite ® 3105 Light Cure Adhesive,MEDICAL: Loctite ® 3311 Light Cure Adhesive11507.9170011.77505.2>1350 †>9.3 † 4503.1>1800 † >2350 † 800>12.4 † >16.2 † 5.5Pellethane 2363-55 courtesy of Dow ChemicalLoctite ® 3340 Light Cure Adhesive,UV Cationic EpoxyLoctite ® 4305 Flashcure ® Light Cure AdhesiveFLUORESCENT: Loctite ® 4307 Flashcure ®Light Cure AdhesiveLoctite ® H3000 Speedbonder Structural Adhesive, General PurposeLoctite ® H4500 Speedbonder Structural Adhesive, Metal BonderLoctite ® 3030 Adhesive, Polyolefin BonderLoctite ® E-00CL Hysol ® Epoxy Adhesive,Low OdorLoctite ® E-90FL Hysol ® Epoxy Adhesive,FlexibleLoctite ® E-30CL Hysol ® Epoxy Adhesive,Glass BonderMEDICAL: Loctite ® M-31CL Hysol ®Epoxy Adhesive, Glass BonderLoctite ® E-20HP Hysol ® Epoxy Adhesive,Fast SettingMEDICAL: Loctite ® M-21HP Hysol ®Epoxy Adhesive, Fast SettingLoctite ® E-214HP Hysol ® Epoxy Adhesive,High StrengthLoctite ® Fixmaster ® High Performance Epoxy2501.77505.23502.47004.87004.84002.87505.27505.25003.56004.18005.5Adhesive PerformanceLoctite ® 401 Prism ® Instant Adhesive used in conjunction with Loctite ® 770 Prism ® Primer, createdbonds which were stronger than the substrate for most of the polyurethane formulations which wereevaluated. Typically, the most of the adhesives tested achieved good bond strengths. Loctite ® 3651 and1942 Hysol ® Hot Melt Adhesives achieved the lowest bond strengths on unfilled polyurethane.Surface TreatmentsThe use of Loctite ® 770 Prism ® Primer, in conjunction with Loctite ® 401 Prism ® Instant Adhesive, orLoctite ® 4011 Prism ® Medical Device Instant Adhesive with Loctite ® 7701 Prism ® Primer, resulted in alarge, statistically significant increase in the bond strengths achieved on polyurethane. Surface rougheningalso resulted in a statistically significant increase in the bond strengths achieved on polyurethane for allthe adhesives which were evaluated.Other Important Information• Polyurethane can be stress cracked by uncured cyanoacrylate adhesives, so anyexcess adhesive should be removed from the surface immediately.• Polyurethane is compatible with acrylic adhesives, but can be attacked by their activators before theadhesive has cured. Any excess activator should be removed from the surface immediately.• Polyurethane is incompatible with anaerobic adhesives.• Surface cleaners: isopropyl alcohol, Loctite ® ODC-Free Cleaner & Degreaser.Loctite ® 1942 Hysol ® Hot Melt Adhesive,EVA Based500.3Loctite ® 3651 Hysol ® Hot Melt Adhesive,Polyolefin500.3Loctite ® 7804 Hysol ® Hot Melt Adhesive1000.7Loctite ® 3631 Hysol ® Hot Melt Adhesive,UrethaneLoctite ® U-05FL Hysol ® Urethane Adhesive,High StrengthLoctite ® Fixmaster ® Rapid Rubber RepairOEM: Loctite ® U-04FL Hysol ®Urethane Adhesive, Fast SettingLoctite ® 5900 ® Flange Sealant,Heavy Body RTV Silicone9506.67004.82501.71000.3NOTES:† Due to the severe deformation of the block shearspecimens, testing was stopped before the actual bondstrength achieved by the adhesive could be determined(the adhesive bond never failed).The addition of the indicated additive (or surfaceroughening) caused a statistically significant decrease inthe bond strength within 95% confidence limits.The addition of the indicated additive (or surfaceroughening) caused a statistically significant increase inthe bond strength within 95% confidence limits.The Loctite ® Design Guide for Bonding Plastics, Volume 4 67
Page 5 and 6:
How To Use The Plastic Bonding Guid
Page 8:
Cyanoacrylate AdhesivesGeneral Desc
Page 11 and 12:
Light Curing Acrylic AdhesivesGener
Page 13 and 14:
Silicone AdhesivesGeneral Descripti
Page 15 and 16:
Why Bond Plastics With Loctite ® B
Page 17 and 18: ADHESIVE SHEAR STRENGTH(psi)(MPa)Ac
Page 25 and 26: ADHESIVE SHEAR STRENGTH(psi)(MPa)Di
Page 27 and 28: ADHESIVE SHEAR STRENGTH(psi)(MPa)Ce
Page 29 and 30: ADHESIVE SHEAR STRENGTH(psi)(MPa)Ep
Page 31 and 32: ADHESIVE SHEAR STRENGTH(psi)(MPa)Po
Page 33 and 34: ADHESIVE SHEAR STRENGTH(psi)(MPa)Io
Page 35 and 36: ADHESIVE SHEAR STRENGTH(psi)(MPa)Li
Page 37 and 38: ADHESIVE SHEAR STRENGTH(psi)(MPa)Ph
Page 53 and 54: ADHESIVE SHEAR STRENGTH(psi)(MPa)Lo
Page 67: ADHESIVE SHEAR STRENGTH(psi)(MPa)Po
Page 73 and 74: ADHESIVE SHEAR STRENGTH(psi)(MPa)St
Page 75 and 76: ADHESIVE SHEAR STRENGTH(psi)(MPa)Vi
Page 77 and 78: Surface TreatmentsAdhesive Abrading
Page 79 and 80: Adhesive Joint DesignIntroductionIn
Page 81 and 82: TitleDesign GuidelinesEngineers mus
Page 83 and 84: Shortening bond overlaps reduces bo
Page 85 and 86: Softening and weakening of the surf
Page 87 and 88: Determining The Test MethodThe lap
Page 89 and 90: Block Shear Test Method1. Assemblie
Page 91 and 92: ViscosityViscosity is a product pro
Page 93 and 94: Index of Trade NamesTrade Name Plas
Page 95 and 96: Trade Name Plastic Type Manufacture
Page 97 and 98: AcknowledgmentsThis manual would no
Page 99: For more information, please call 1
show all

Volume 4 - Loctite.ph

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?