EPIKOTE TM Resin MGS RIM 235

Transcription

1 2.1-1 EPIKOTE TM Resin MGS RIM 235 EPIKURE TM Curing Agent RIM H page Caracteristics 1 Application 11 Specifications 12 Processing details 13 Mixing ratios 13 Temperature development 13 Viscosity of mixture 14 Viscosity development 14 Gel time 15 DMA 16 Development T G3 17 Mecanical data 18 Content Approval Germaniscer Lloyd Caracteristics Application rotor blades for wind turbines, boat and sipbuilding, sports equipment, model construction, tooling and moulding Operational temperature -6 C up to +5 C (-76 F up to 122 F) witout eat treatment -6 C bis +8 C (-76 F up to 176 F) after eat treatment Processing at temperatures between 15 C and 5 C ( F) Features very low viscosity pot life from approx. 1 minutes to approx. >1 economically priced, pysiologically compatible Storage self life of 24 monts in originally sealed container s

2 RIM 235 is an infusion resin for manufacturing composite parts suc as rotorblades for wind turbines or boatbuilding. Tis epoxy resin system is specially suited to process all state of te art fabrics, suc as glass, carbon or aramide using common infusion teciques suc as VARIM, SCRIMP or RIM. Application Te Infusion resin system RIM 235 remains practically free of crystallisation, even if it is stored at low temperatures (<15 C/ <59 F). As te formulation contains only a very low percentage of reactice diluent, tis system sows a particularly good pysiological compatibility, even if it is being worked in open moulded processes. Altoug te initial cure at room temperature is good, te full mecanical properties will only be obtained after a suitable post cure cycle. Especially for operations at elevated temperatures (maximum 8 C/176 F), suc a post cure cycle is required to obtain te required termal stability. For optimum mecanical properties a eat treatment of minimum 5 C is required. Optimum processing temperatures are in te range of 15-4 C (59-14 F). Potlife depends on te coice of ardeners and can be varied between 1 min. and more tan 1. Te sortest working life is establised using RIMH 235. Pot life increases wit te increasing number of te dedicated ardener and can be as ig as >1 wit ardener RIMH 238. As te initial cure at room temperature is very slow as for te low reactive ardeners, some eat treatment sould be performed at minimum 4-5 C ( F) before demoulding te produced parts to ensure sort cycle times. RIM 235 features an extrordinary low mixed visosity, resulting in fast and complete fiber wetting at a ig transportation rate in infusion processes. However, if parts sould be produced using and lay-up tecniques, it is recommended to add some tixotropic agent, suc as Aerosil, to prevent drain out from vertical laminates, especially if noncrimp fabrics are being processed. Altoug RIM 235 is very unlikely to crystallize at low temperatures, storage conditions of 15-3 C (59-86 F) and low umidity are recommended. After dispensing material, te containers must again be closed carefully, to avoid contamination or absorption of water. All amine ardeners sow a cemial reaction wen exposed to air, known as blusing. Tis reaction is visible as wite carbamide crystals, wic could make te materials unusable. Te materials ave a self life of minimum 2 years, wen stored in teir originally sealed containers.

3 Infusion resin RIM 235 Specifications D ensity [ g/cm³ ] 1,14-1,18 V iscosity [ mpas] 1-13 Epoxy equivalent [ g/equivalent] Epoxy value Refractory index [equivalent/ 1 g],55 -,62 1,55-1,56 Measuring condition: measured at 25 C / 77 F Hardener RIMH 235 Hardener RIMH 236 D ensity [ g/cm³ ],92 -,96,98-1,2 V iscosity [ mpas] Amine value Refractory index [ mg KOH/g] ,465-1,469 1,46-1,469 Hardener RIMH 237 Hardener RIMH 238 D ensity [ g/cm³ ],92 -,96,93 -,97 V iscosity [ mpas] Amine value Refrectory index [ mg KOH/g] ,455-1,475 1,455-1,468 Measuring condition: measured at 25 C / 77 F

4 Infusion resin RIM 235 Hardeners RIMH RIMH 238 Processing details Average Value EP - Average amine equivalent, Infusion resin RIM 235 : Hardener RIMH RIMH 238 Mixing ratios Parts by weigt 1 : 34 ± 2 Parts by volume 1 : 41 ± 2 Te mixing ratio stated must be observed carefully. Adding more or less ardener will not result in a faster or slower cure, only incomplete curing wit limited performance, tat can not be corrected in any way. Resin and ardener must be mixed carefully. Mix until no clouding is visible in te mixing container. Special attention must be paid to te walls and bottom of te mixing container. [ F] [ C] Temperature RIMH 235 Temperature development 14 4 RIMH 236 RIMH RIMH : 1: 2: 3: 4: 5: 6: 7: 8: 9: Measuring conditions: 1 g bei 3 C in water bat Time [:mm] Te optimum processing temperature is in te range between 2 and 4 C. Higer processing temperatures are possible, but will sorten pot life. An increase in temperature of 1 C will alve te pot life. Water (for example very ig umidity or contained in fabrics or fillers) causes an acceleration of te resin / ardener reaction. Different temperatures and umidities during processing ave no significant impact on te mecanical properties of te cured product.

5 [mpas] Viscosity RIMH 238 RIMH 236 RIMH 235 RIMH 237 [ C] [ F] Temperature Viscosity of mixture [mpas] Viscosity RIMH 235 RIMH 236 RIMH 237 RIMH Time [min] Viscosity development Measuring conditions: Investigation in rotation viscosimeter, plate-plate configuration measuring gap:,2mm

6 Infusion resin RIM 235 Gel time Hardener RIMH 235 Hardener RIMH C F 4-45 C F app. 8-9 app. 3-4 app app. 4-6 Film tickness 1 mm at different temperatures Hardener RIMH 237 Hardener RIMH C F 4-45 C F app app. 7-8 app app Film tickness 1 mm at different temperatures

7 DMA Measuring after eat treatment DMA-T G (peak) tan delta Infusion resin RIM 235 wit Hardener RIMH 236 DMA E Storage Module [MPa] tan delta Onset 6,8 C/141,4 F E (1 Hz) Peak 63,2 C/145,8 F Heat treatment: 5 C/12 F tan d (1 Hz),5,4,3,2,1, -,1 -,2 [ C] [ F] Temperature DMA Measuring after eat treatment DMA-T G (peak) tan delta Infusion resin RIM 235 wit Hardener RIMH 236 E Storage Module [MPa] tan delta 35 3 Heat treatment: 7 C/158 F Peak 86,5 C/187,7 F,5, E (1 Hz) Onset 76,6 C/169,9 F,3,2 15,1 1 tan d (1 Hz), 5 -,1 -,2 [ C] [ F] Temperature Measurment conditions Coupon tickness: 2 mm Heating rate: 2 K/min Frequency: 1 Hz

8 Infusion resin RIM 235 / Hardener RIMH 235 [ F] [ C] Temperature Heat Treatment at: 8 C/175 F 7 C/16 F 6 C/14 F Development T G C/12 F Time [] Infusion resin RIM 235 / Hardener RIMH 236 [ F] [ C] Temperature Heat Treatment at: 8 C/175 F 7 C/16 F 6 C/14 F 5 C/12 F Time [] Infusion resin RIM 235 / Hardener RIMH 238 [ F] [ C] Temperature Heat Treatment at: 8 C/175 F 7 C/16 F 6 C/14 F Time []

9 Mecanical data of neat resin Mecanical data D ensity [ g/cm³ ] 1,1-1,2 F lexural strengt [ N/mm² ] 1-12 M odulus of elasticity [ kn/mm² ] 3, - 3, 2 T ensile strengt [ N/mm² ] 7-8 C ompressive strengt [ N/mm² ] 8-1 Elongation a t break [%] 8-12 I mpact strengt [ KJ/m² ] 6-8 Water absorption at 23 C 24 7 d [%] [%],1 -,5,2 -,8 Curing: partly cured / full cure Advice: Mecanical data are typical for te combination of laminating resin RIM 235 wit ardener RIMH 237. Data can differ in oter applications.

10 Data of reinforced resin Static tests in standard climate Mecanical data Reinforced wit GRC Glass fibre CRC Carbon fibre SRC Aramide fibre Flexural strengt Tensile strengt Compressive strengt Interlaminar sear strengt Modulus of elasticity [ N/mm²] [ N/mm²] [ N/mm²] [ N/mm²] [ kn/mm²] GRC samples: 16 layers of glass fabric, CRC samples: 8 layers of carbon fabric SRC samples: 15 layers of aramide fabric, 275 g/m² 4 mm tick 2 g/m² 2 mm tick 17 g/m² 4 mm tick Fibre content of samples during processing/testing: 4-45 vol% Data calculated for fibre content of 43 vol% Typical data according to WL Parts 1 and 2 of te GERMAN AVIATION MATERIALS MANUAL Sample preparation Curing: 24 ours at 23 C (74 F) + 15 ours at 8 C (176 F)