Light Cure Adhesive Technology - Henkel Content Management ...

Light Cure AdhesiveTechnologyIssue 1

Light Cure Adhesives for PlasticsPlastic bonding adhesives can be curedby UV and visible light and achieve lowstress, ultra clear bonds, making themparticularly suitable for bonding modern plastics.• Transparency equal to the plastic substrate obtains invisible bond lines• Temperature resistance and deformation behaviour match that of plastics, providingfor a high degree of long-term durability• Capable of bonding transparent plastics, e.g. PC, acrylic, PBT, PVC and plasticised PVC,most opaque plastics, e.g. PA, as well as most non-transparent or coloured plastics• Various light cure technologies for adaptation to the wavelengths passing through clearor UV-stabilised or translucent pigmented plasticsApplications• Bonding and sealing of housing assemblies, lids, shells, windows into frames, sunglasses …• Display cases and shelves, point of sale material …• Medical device industry – needles, housings, adapters, connectors …8

Light Cure Adhesives for Non Transparent SubstratesA large number of substrates are not transparent to light at all becausethey are made of a material that does not allow light to transmit (e.g. metals,ceramics, ferrites), or because they contain a non transparent additive(e.g. black, colour additives).The versatility of light curable adhesives for use in bonding and tacking, pottingand encapsulating, coating and sealing applications is further enhanced by products whichhave a secondary cure mechanism to ensure residual or complete cure in shadowed areas notreached by UV or visible light. For such joint confi gurations, light cure adhesives are availablewith secondary cure capability. This secondary curing options include heat, moisture, activator oras anaerobic cure.Light cure adhesives offer benefits even whennon transparent substrates are involved:• Precise positional fi xturing of parts to be bonded• Fast cure for high processing speeds and in-line quality control capability• Reliable cure of exposed excess adhesive fi llets or squeeze-out• Cure in shadowed areas over time by secondary cure10

ApplicationsWherever fast cure of adhesive in fi llets accessible by light offers a process benefi t, e.g. for• Fast fi xturing of magnets, ferrites, ceramic parts …• Fast positioning of parts in retaining joints …• Fillet or surface cure, e.g. of post-applied product outside the bond area …ProductAdhesiveTechnologyViscosity[mPa.s]ColourFixtureTime [s](@ 6mW/cm²@ 365 nm)Suitable forGlass Plastic Metal CeramicLoctite ® 352 Acrylic 15000 transparent, amber 10 b n b bLoctite ® 366 Anaerobic 7500 transparent, amber 15 n b bLoctite ® 385 Acrylic 4000 transparent, amber 15 b b bLoctite ® 661 Anaerobic 500 transparent, yellow 12 b bLoctite ® 3526 Acrylic 17500 transparent, amber 5 b b b bLoctite ® 3851 Anaerobic 5000 transparent, pale yellow 12 b b bLoctite ® 3920 Acrylic 10000 translucent, amber 12 n b bLoctite ® 4304* Cyanoacrylate 20 transparent, pale green 2 b n nLoctite ® 4305* Cyanoacrylate 900 transparent, pale green 2 b n nLoctite ® 5083 Silicone paste translucent, colourless >30 b n b bLoctite ® 5088 Silicone 65000 translucent, straw coloured >30 b n b bLoctite ® 5091 Silicone 5000 translucent, slightly milky >30 b n b bLoctite ® 128157 Anaerobic 15 pale green >30 b b*ISO 10993 certifi ed or USP Class VI approved. Certifi cates of Compliance to ISO 10993 or USP Class VI approvals are availiableat www.loctite.com or through your local Henkel Representive.b excellent n good11

Equipment for Light CuringFour major factors must be taken into consideration when designing a successful light cure application: emission spectrumof the cure system, light intensity, transmission properties of substrate, and the required cure characteristics. As amanufacturer of both the chemistry and the curing equipment, Henkel knows how to match light cure adhesives to thecorrect dispensing and curing system.Flood Cure Systems1000 WLoctite ® 97055 / 97056Loctite ® 97055 high intensity light cure chamber system for manual loading.Loctite ® 97056 tunnel version designed for integration into automated lines.Different bulbs are available for appropriate emission spectrums.Bulb UV UV / Visible INDIGOLoctite ® 97346Loctite ® 97347Loctite ® 97348= Medium intensity= High intensity= Very high intensity400 WLoctite ® 97039 / 97063Medium intensity manual workstation for batch manufacturing processes.Loctite ® 97063 free of any UV light emittance, especially designed forINDIGO light curing grades.Cure System UV UV / Visible INDIGOLoctite ® 97039Loctite ® 97063 –= Medium intensity= High intensity= Very high intensity1000 WEnergy consumption of bulbLEDLED systemEmission spectrum contains UV lightEmission spectrum containsUV / Visible lightEmission spectrum containsvisible INDIGO lightExposure timerInterface for PLC connection,e.g. external startInternal intensity monitoringSpot cure systemFlood cure system12

www.uv.loctite.co.ukSpot Cure SystemsLEDLoctite ® 97059High intensity, long lifetime system designed for curing Loctite ® UV adhesives andcoatings with UV light. Modern LED technology provides “cool“ radiation at narrowbandwidth.Loctite ® 97057This Light Guide System is a high power lamp system designed for curingLoctite ® UV adhesives and coatings with UV, UV / Visible light and UV Indigoto be combined with appropriate light guide.Loctite ® 97323: Ø 5 x 1500mm, Loctite ® 97324: Ø 8 x 1500mm,Loctite ® 97318: 2x Ø 3 x 1500mmAccessoriesLoctite ® 98086 / Loctite ® 98089The Dosimeter-Radiometer measures light dose (energy) and light intensity of the UV curingequipment and is a self contained one channel device. Loctite ® 98086 for UV light,Loctite ® 98089 for UV / visible light.Loctite ® 98720The Loctite ® Spot Radiometer is a self-contained, electro-optic instrument designedto measure and display the UV power density (irradiance) emitted by a UV light guide.For light guides Ø 3mm, Ø 5 mm and Ø 8 mm.Loctite ® 8953426 / 8953427UV protection glassesLoctite ® 8953426: protection glasses grey, best to use for UV lightLoctite ® 8953427: protection glasses orange, best to use for UV / Visibleand INDIGO light.Loctite ® 8953426Loctite ® 895342713

Dispensing EquipmentLoctite ® 97135 /97136Loctite ® 97106 /97108Automatic Dispense EquipmentLoctite ® 97123 / 97152Loctite ® 97102Loctite ® 97113 / 97114 Loctite ® 98009Automatic dispense equipment is designed for implementation in production lines. A package consists of reservoir, controller andvalve. For valve selection fi nd table below as guidance.ViscosityMicrodotMicro beadDotMedium beadDropBeadLow* Loctite ® 98009 Loctite ® 98009 / 97135 (not for UVCA) Loctite ® 97135 (not for UVCA)Medium** Loctite ® 98009 Loctite ® 97135 / 97136 (not for UVCA)Loctite ® 97113Loctite ® 97113High*** on request Loctite 97114 Loctite ® 97114Loctite ® 98009Diaphragm valve, designed for pressure time dispensing.Provides high resolution stroke adjustment resulting inconsistent fl ow controlLoctite ® 97135 / 97136Diaphragm valve, designed for pressure time applications.Do not use for UV CA applicationsLoctite ® 97113 / 97114Patented sealless dispense valve designed for pressure timeapplications, with adjustable suck-back featureLoctite ® 97108 / 97106Reservoir with analog level sensor to display fi lling levelof container. Loctite ® 97108 for pack sizes up to 1000ml,Loctite ® 97106 for pack sizes up to 500ml.Loctite ® 97102 / 97123 / 97152Controller unit for semi automated systems. Controller handlescommunication and action between reservoir, valve andoperator. Loctite ® 97123 / successor 97152 can be combinedwith appropriate peripheral systems, to be ordered separately,e.g. online monitoring of dispensingIn addition to the standard equipment available,Henkel can design and build customised equipmenton request.* Low viscosity up to 2,500 mPa.s** Medium viscosity approx. 2,500 mPa.s – approx. 7,500 mPa.s*** High viscosity over 7,500 mPa.sPlease contact us for info on thixotropic or paste adhesives14

www.uv.loctite.co.ukLoctite ® 97009Dispensing Equipmentfor Standard WorkstationsLoctite ® 97121Set up combines the compact system Loctite ® 97009 with an appropriate valve(see table below). Footswitch Loctite ® 97201 can be offered as an option for ease of operation.Loctite ® 97130ViscosityMicrodotMicro beadDotMedium beadDropBeadLow* on request Loctite ® 97121 Loctite ® 97121Medium** on request Loctite ® 97130 Loctite ® 97130High*** on request Loctite ® 97112 Loctite ® 97112Loctite ® 97121Pinch valve applicator can be mounted on tank lid or be usedas manually held dispensing valveLoctite ® 97130Dispense valve with stroke adjustment to defi ne amountof dispensed productLoctite ® 97009Compact system combines controller and reservoir forpack sizes up to 1000mlLoctite ® 97006Dispensing SystemDispensing system for syringes and small bottlesLoctite ® 98026Loctite ® 98548ViscosityMicrodotMicro beadDotMedium beadDropBeadLow* Loctite ® 98548 Loctite ® 98548, 97006, 98026 Loctite ® 97006, 98026Medium** Loctite ® 98548 Loctite ® 97006, 98026 Loctite ® 97006, 98026High*** on request Loctite ® 97006, 98026 Loctite ® 97006, 98026Loctite ® 97006High precision dispensing system for 25ml syringesLoctite ® 98026Manual 25ml syringe gunLoctite ® 98548Peristaltic dispensing system for low and medium viscosityproducts dispensed out of small bottles15

Product Selector GuideLight Cure Adhesives for GlassProduct Pack Size Viscosity[mPa.s]OperatingTemperatureDepthof Cure[mm]ColourFluorescenceLoctite ® 350 50 ml, 250 ml 4500 120ºC 4 transparent, light amber –Loctite ® 352 50 ml, 250 ml, 1L 15000 150ºC 4 transparent, amber –Loctite ® 358 50 ml, 250 ml 2500 120ºC 4 transparent, amber –Loctite ® 385 250 ml 4000 120ºC 2 transparent, amber –Loctite ® 3051* 1L 1200 120ºC 4 clear –Loctite ® 3081 25 ml, 1L 100 120ºC 4 clear YesLoctite ® 3491* 25 ml, 1L 1100 130ºC 4 clear –Loctite ® 3494 25 ml, 1L 6000 120ºC > 13 clear –Loctite ® 3525 25 ml, 1L 15000 140ºC > 13 clear YesLoctite ® 3851 250 ml 5000 120ºC 1 transparent, pale yellow –Loctite ® 5083 300 ml, pail thixo paste 200ºC 5 translucent, colourless –Loctite ® 5088 300 ml, pail 65000 200ºC 1.5 translucent, straw coloured –Loctite ® 5091 300 ml, pail 5000 180ºC 4 translucent, slightly milky –Loctite ® 158587 30 ml thixo paste 120ºC 4 transparent, light amber –Light Cure Adhesives for PlasticsUV Cure Plastic AdhesivesProduct Pack Size Viscosity[mPa.s]OperatingTemperatureDepthof Cure[mm]ColourFluorescenceLoctite ® 302/3011* 1L 110 100°C 4 transparent, light amber –Loctite ® 322 250 ml, 1L 5500 100°C 4 transparent, light amber –Loctite ® 3081* 25 ml, 1L 100 120°C 4 clear YesLoctite ® 3108/3381* 25 ml, 1L 5100 130°C 4 translucent, colourless –Loctite ® 3115 1L 2000 100°C 3.5 transparent –Loctite ® 3491 25 ml, 1L 1100 130°C 4 clear –Loctite ® 3751 1L 10000 100°C 3.5 clear –Loctite ® 3761 1L 2200 100°C 3.5 transparent, amber –UV/Visible Light Cure Plastic AdhesivesProduct Pack Size Viscosity[m Pa.s]OperatingTemperatureDepthof Cure[mm]ColourFluorescenceLoctite ® 3201 25 ml, 1L 3750 140°C > 13 transparent, pale straw –Loctite ® 3103/3211* 25 ml, 1L 10.000 thixotropic 140°C > 13 transparent, amber –Loctite ® 3104/3301* 25 ml, 1L 160 130°C > 13 transparent, colourless –Loctite ® 3105/3311* 25 ml, 1L 300 130°C > 13 transparent, colourless –Loctite ® 3106/3321* 25 ml, 1L 5500 150°C > 13 transparent, light yellow –Loctite ® 3341 25 ml, 1L 500 100°C > 13 transparent, light yellow YesLoctite ® 3494 25 ml, 1L 6000 120°C > 13 clear –Loctite ® 3525 25 ml, 1L 15000 140°C > 13 clear YesLoctite ® 3921* 25 ml, 1L 150 130°C > 13 transparent, colourless YesLoctite ® 3922* 25 ml, 1L 300 130°C > 13 transparent, colourless YesLoctite ® 3926* 25 ml, 1L 5500 150°C > 13 transparent, colourless YesLoctite ® 3936* 25 ml, 1L 11000 140°C > 13 transparent, colourless Yes*ISO 10993 certifi ed or USP Class VI approved. Certifi cates of Compliance to ISO 10993 or USP Class VI approvals are availiable at www.loctite.com or through your local Henkel Representive.16

www.uv.loctite.co.ukTack free Time [s](Loctite ® 97055,@ 100mW @ 365 nm)Fixturing Time [s](@ 6mW/cm²@ 365 nm)ShoreHardnessSuitable forGlass PC ABS PVC PVCplasticisedPBT PA Metal Ceramic20 15 D 70 b b n n b n UV17 10 D 60 b n b b UV17 6 – b b n n b n UV30 15 – b b b UV15 20 D 75 b b n n n n b n UV8 10 D 74 b b b b n n n n n UV15 12 D 75 b b b b n n b n UV> 30 8 D 65 b b b b n n b n UV10 5 D 60 b b b b b n b n UV12 12 – b b b UV20 > 30 A 55 b n n n n b b UV> 30 > 30 A 30 b n n n n n b b UV30 > 30 A 34 b n b b UV30 15 – b b b n UVSuCuTack free Time [s](Loctite ® 97055,@ 100mW @ 365 nm)Fixturing Time [s](@ 6mW/cm²@ 365 nm)ShoreHardnessSuitable forGlass PC ABS PVC PVCplasticisedPBT PA Metal Ceramic8 10 D 68 b b b n b n n n UV4 10 D 68 b b b n b n n n UV8 10 D 74 b b b b n n n n n UV>30 30 A 72 n b b b n n n n UVn.a. D 75 b b n n n b UV15 12 D 75 b b b b n n b UV20 5 D 73 b b b n n n UV20 5 D 69 b b b n n n UVSuCuTack free Time [s](Loctite ® 97055,@ 100mW @ 365 nm)Fixturing Time [s](@ 6mW/cm²@ 365 nm)ShoreHardnessSuitable forGlass PC ABS PVC PVCplasticisedPBT PA Metal Ceramic> 30 12 D 59 n b b b n n n n UV> 30 12 D 51 n b b b n n b n UV> 30 12 D 69 n b b b n b b b n UV> 30 12 D 64 n b b b n b b b n UV> 30 12 D 53 n b b b b b b b n UV15 8 D 27 b b b b n n n n UV> 30 8 D 65 b b b b n n b n UV10 5 D 60 n b b b b n b n UV> 30 3 D 67 n b b b n b b n n UV> 30 5 D 66 n b b b n b b n n UV> 30 3 D 57 n b b b b b b n n UV> 30 12 D 55 n b b b b b n n UVSuCu17

itablere SystemSecondaryCure SystemSpecific CharacteristicsProduct– High humidity and chemical resistance Loctite ® 350Activator 7071 High humidity and chemical resistance, toughened Loctite ® 352– Fast fi xture Loctite ® 358Activator 7649 Glass bonding adhesive with shadow cure Loctite ® 385– High strength Loctite ® 3051*– Fast surface cure Loctite ® 3081– High transparency, low yellowing Loctite ® 3491*UV/VIS – High transparency, low yellowing Loctite ® 3494UV/VIS – High strength, toughened Loctite ® 3525Activator 7649 Glass bonding adhesive with shadow cure Loctite ® 3851Atmospheric moisture High elasticity, acetoxy silicone Loctite ® 5083Atmospheric moisture High elasticity, alcoxy silicone Loctite ® 5088Atmospheric moisture High elasticity, acetoxy silicone Loctite ® 5091– High humidity and chemical resistance Loctite ® 158587itablere SystemSecondaryCure SystemSpecific CharacteristicsProduct– Fast surface cure Loctite ® 302/3011*– Fast surface cure Loctite ® 322– Fast surface cure Loctite ® 3081– Highly fl exible, high thermal cycling resistance Loctite ® 3108/3381*– Clear semi-fl exible coating, encapsulating Loctite ® 3115– High transparency, low yellowing Loctite ® 3491– Coating, sealing, encapsulating Loctite ® 3751– Coating, sealing, encapsulating Loctite ® 3761itablere SystemSecondaryCure SystemSpecific CharacteristicsProductUV/VIS – For stress sensitive plastics Loctite ® 3201UV/VIS – For stress sensitive plastics Loctite ® 3103/3211*UV/VIS – For stress sensitive plastics Loctite ® 3104/3301*UV/VIS – For stress sensitive plastics Loctite ® 3105/3311*UV/VIS – For stress sensitive plastics Loctite ® 3106/3321*UV/VIS – Highly fl exible, for soft PVC Loctite ® 3341UV/VIS – High transparency, low yellowing Loctite ® 3494UV/VIS – High strength, toughened Loctite ® 3525UV/VIS – Fluorescent, for stress cracking sensitive plastics Loctite ® 3921*UV/VIS – Fluorescent, for stress cracking sensitive plastics Loctite ® 3922*UV/VIS – Fluorescent, for stress cracking sensitive plastics Loctite ® 3926*UV/VIS – Fluorescent, for stress cracking sensitive plastics Loctite ® 3936*b excellentn good18

Product Selector GuideLight Cure Adhesives for Plastics (cont.)Visible Indigo Light Cure Plastic AdhesivesProduct Pack Size Viscosity[mPa.s]OperatingTemperatureDepthof Cure[mm]ColourFluorescenceLoctite ® 3554* 25 ml, 1L 300 100°C >13 transparent, yellow YesLoctite ® 3555* 25 ml, 1L 1000 100°C >13 transparent, yellow YesLoctite ® 3556* 25 ml, 1L 5000 100°C >13 transparent, yellow YesDual Cure Plastic AdhesivesProduct Pack Size Viscosity[mPa.s]OperatingTemperatureDepthof Cure[mm]ColourFluorescenceLoctite ® 3526 25 ml, 1L 17500 140°C >13 transparent, amber YesLoctite ® 4304* 20 g, 454 g 20 100°C >13 transparent, pale green –Loctite ® 4305* 20 g, 454 g 900 100°C >13 transparent, pale green –Light Cure Adhesives for Non Transparent SubstratesProduct Pack Size Viscosity[mPa.s]OperatingTemperatureDepthof Cure[mm]ColourFluorescenceLoctite ® 352 50 ml, 250 ml, 1L 15000 150°C 4 transparent, amber –Loctite ® 366 250 ml 7500 120°C 1,5 transparent, amber –Loctite ® 385 250 ml 4000 120ºC 2 transparent, amber –Loctite ® 661 250 ml 500 175°C 1 transparent, yellow –Loctite ® 3526 25 ml, 1L 17500 140°C >13 transparent, amber YesLoctite ® 3851 250 ml 5000 120°C 1 transparent, pale yellow –Loctite ® 3920 300 ml 10.000 120°C 3 translucent, amber –Loctite ® 4305* 20 g, 454 g 900 100°C >13 transparent, pale green –Loctite ® 5083 300 ml, pail thixo paste 200ºC 5 translucent, colourless –Loctite ® 5088 300 ml, pail 65000 200ºC 1,5 translucent, straw coloured –Loctite ® 5091 300 ml, pail 5000 180ºC 4 translucent, slightly milky –Loctite ® 128157 50 ml, 250 ml, 1L 15 150°C 0,5 pale green –*ISO 10993 certifi ed or USP Class VI approved. Certifi cates of Compliance to ISO 10993 or USP Class VI approvals are availiable at www.loctite.com or through your local Henke19

www.uv.loctite.co.ukTack free Time [s](Loctite ® 97055,@ 100mW @ 365 nm)Fixturing Time [s](@ 6mW/cm² @ 365nm)ShoreHardnessSuitable forGlass PC ABS PVC PVCplasticisedPBT PA Metal Ceramic10 5 D 75 b b b n n n n10 5 D 77 b b b n n n n10 5 D 68 b b b n n n nTack free Time [s](Loctite ® 97055,@ 100mW @ 365 nm)Fixturing Time [s](@ 6mW/cm² @ 365nm)ShoreHardnessSuitable forGlass PC ABS PVC PVCplasticisedPBT PA Metal Ceramic5 D 62 b b n b n n b b2 D 72 b b b n b b n n2 D 77 b b b n b b n nTack free Time [s](Loctite ® 97055,@ 100mW @ 365 nm)l Representive.Fixturing Time [s](@ 6mW/cm² @ 365nm)ShoreHardnessSuitable forGlass PC ABS PVC PVCplasticisedPBT PA Metal Ceramic17 10 D 60 b n b b15 15 – n b b30 15 – b b b>30 12 – b b5 D 62 b b n b n n b b12 12 – b b b20 12 D 65 n n b b2 D 77 b b b n b b n n20 > 30 A 55 b n n n n b b> 30 > 30 A 30 b n n n n n b b30 > 30 A 34 b n b b>30 >30 – b b20

SuitableCure SystemSecondaryCure SystemSpecific CharacteristicsProductUV UV/VIS INDIGO – Fast cure, for coloured transparent substrates Loctite ® 3554*UV UV/VIS INDIGO – Fast cure, for coloured transparent substrates Loctite ® 3555*UV UV/VIS INDIGO – Fast cure, for coloured transparent substrates Loctite ® 3556*SuitableCure SystemSecondaryCure SystemSpecific CharacteristicsProductUV Heat, 15 min @ 120°C Glass and plastic bonding adhesive, dual cure by heat Loctite ® 3526UV UV/VIS Surface moisture High plastic adhesion, low intensity cure Loctite ® 4304*UV UV/VIS Surface moisture High plastic adhesion, low intensity cure Loctite ® 4305*SuitableCure SystemSecondaryCure SystemSpecific CharacteristicsProductUV Activator 7071 Glass bonding adhesive, toughened Loctite ® 352UV Activator 7649 Bonding metals, ceramics Loctite ® 366UV Activator 7649 Glass bonding adhesive with shadow cure Loctite ® 385UV Anaerobic, Activator 7649 High strength, retaining compound Loctite ® 661UV UV/VIS Heat, 15 min @ 120°C Glass and plastic bonding adhesive, dual cure by heat Loctite ® 3526UV Activator 7649 Glass bonding adhesive with shadow cure Loctite ® 3851UV Activator 7380, 7386 Magnet Bonder Loctite ® 3920UV UV/VIS Surface moisture High plastic adhesion, low intensity cure Loctite ® 4305*UV Atmospheric moisture High elasticity, acetoxy silicone Loctite ® 5083UV Atmospheric moisture High elasticity, alcoxy silicone Loctite ® 5088UV Atmospheric moisture High elasticity, acetoxy silicone Loctite ® 5091UV Anaerobic, Activator 7649 For metal assemblies Loctite ® 128127b excellentn good21

Henkel LimitedTechnologies HouseWood Lane EndHemel HempsteadHertfordshire HP2 4RQTel.: 01442 278100Fax: 01442 278071www.loctite.co.ukThe data contained herein are intended as reference only. Please contact your local Henkel Technical Support Group for assistance and recommendationon specifi cations for these products.® designates a trademark of Henkel AG & Co. KGaA or its affi liates, registered in Germany and elsewhere© Henkel AG & Co. KGaA, 2008