EPICOTE TM Resin MGS LR 385

Transcription

1 1.1-1 EPICOTE TM Resin MGS LR 385 EPICURE TM Curing Agent MGS LH 385, 386 page Characteristics 1 Application 2 Specification 3 Processingdetails 3 Mixing ratios 4 development 4 Gel time 4 Viscosity of mixture 5-6 Viscosity development 5-6 DMA 7-9 Development of T G 1 Mechanical data Content Approval German Federal Aviation Authorit y Characteristics Application production of gliders, motor gliders and motor planes, boat and shipbuilding, sports equipment, model airplanes, moulds and tools Operational temperature -6 C up to +95 C (-76 F up to 23 F) after heat treatment Processing at temperatures all usual processing between 1 C und 5 C (5 F F), methods Features extremly good physiological compatibility, good mechanical and thermic properties, pot life of approx. 2 min to approx. 2 not to be declared as toxic hours, Special modifications on request Storage shelf life of 24 month in originally seald container s

2 1.1-2 Laminating resin system approved by the GERMAN FEDERAL AVIATION AUTHORITY with different pot lifes for processing of glass, carbon and aramide fibres, featuring high static and dynamic loadability. Application After heat treatment at 5-55 C ( F), the system meets the standards for gliders and motor gliders (operational temperatures -6 C (-76 F) to +54 C (129 F). In order to meet the standards for motor planes (operational temperatures -6 C (-76 F) to +72 C (161 F), heat treatment at 8 C (176 F) is necessary. The range of pot lives is between approx. 2 min and 2 h. The hardeners have the same mixing ratio and can be mixed among themselves in any ratio. This permits a selection of the optimum system for all processing methods. After initial curing at room temperature, the components manufactured are workable and demouldable. You will receive high-gloss and non-tacky surfaces, even with unfavourable precuring conditions, e. g. lower temperatures or high humidities. The mixing viscosity guarantees fast and complete impregnation of the reinforcement fibres; however, the resin will not spill out of the fabrics on vertical surfaces. In order to obtain special properties, it is also possible to add fillers to the mixture of resin/hardener, such as Aerosil, microballoons, cotton flakes, metal powder, etc. If high heat resistance or aircraft approval are not necessary, hardener LH 385 can also be used without heat treatment afterwards. However, the indicated properties will only be obtained after heat treatment at temperatures over 5 C (122 F). As a matter of experience LR 385 can be combined with suitable gelcoats on UP, PU and EP basis. Although our resin systems are very unlikely to crystallize at low temperatures, storage conditions of 15-3 C (59-86 F)and low humidity are recommended. After dispensing material, the containers must again be closed carefully, to avoid contamination or absorption of water. All amine hardeners show a chemial reaction when exposed to air, known as blushing. This reaction is visible as white carbamide crystals, which could make the materials unusable. Crystallization is visible as a clouding or solidification of the contents of the container. If crystallisation of either component should be observed, it can removed by warming up. Slow warming up to approx. 5-6 C ( F) in a water bath or oven and stirring or shaking will clarify the contents of the container without any loss of quality. Use only completely transparent products. Before warming up, open containers slightly to permit equalization of pressure. Caution during warm-up! Do not warm up over an open flame! While stirring up use safety equipment (gloves, eyeglasses, gas mask). The relevant industrial safety regulations for the handling of epoxy resins and hardeners and our instructions for safe processing are to be observed.

3 1.1-3 Laminating resin LR 385 Specification D ensity [ g/cm³ ] 1,16-1,2 V iscosity [ mpas] 7-15 [ g/äquivalent] Epoxyequivalent Epoxyvalue Refractory index [Äquivalent/ 1g],58 -,64 1,535-1,542 measured at 25 C / 77 F Hardener LH 385 Hardener LH 386 D ensity [ g/cm³ ],95 -,99,93 -,97 V iscosity [ mpas] Amine value Refractory index [ mg KOH/g] ,48-1,529 1,462-1,51 measured at 25 C / 77 F Resin LR 385 Hardener LH 385 Hardener LH 386 Average EP-Value, Processing details Average amine equivalent

4 1.1-4 Laminating resin LR 385 : Hardener LH 385, 386 Mixing ratios Parts by weight 1 : 35 ± 2 Parts by volume 1 : 43 ± 2 The mixing ratio stated must be observed carefully. Adding more or less hardener will not result in a faster or slower cure, but in incomplete curing with limited performance, that can not be corrected in any way. Resin and hardener must be mixed carefully. Mix until no clouding is visible in the mixing container. Special attention must be paid to the walls and bottom of the mixing container. [ F] [ C] Hardener LH 385 Hardener LH 386 development : :15 :3 :45 1: 1:15 1:3 1:45 2: Sample: 1g / 3 C Time [hh:mm] The optimum processing temperature is in the range between 2 and 4 C. Higher processing temperatures are possible, but will shorten pot life. An increase in temperature of 1 C will halve the pot life. Water (for example very high humidity or contained in fabrics or fillers) causes an acceleration of the resin / hardener reaction. Different temperatures and humidities dring processing have no significant effect on the mechanical properties of the cured product. Resin LR 385 Hardener LH C app. 2-3 h Resin LR 385 Hardener LH 386 app. 4-5 h Gel time 4-45 C app min app min Film thickness 1 mm at different temperatures

5 1.1-5 Laminating resin LR 385 / Hardener LH 385 [mpas] Viscosity 25 Viscosity of mixture [ C] [ F] Investigation in rotation viscosimeter, plate-plate configuration measuring gap:,2mm Laminating resin LR 385 / Hardener LH 385 [mpas] Viscosity Investigation in rotation viscosimeter, plate-plate configuration measuring gap:,2mm Time [min] Viscosity development

6 1.1-6 Laminating resin LR 385 / Hardener LH 386 [mpas] Viscosity 14 Viscosity of mixture [ C] [ F] Investigation in rotation viscosimeter, plate-plate configuration measuring gap:,2mm Laminating resin LR 385 / Hardener LH 386 [mpas] Viscosity Investigation in rotation viscosimeter, plate-plate configuration measuring gap:,2mm Time [min] Viscosity development

7 1.1-7 DMA Measuring after heat treatment DMA-T G (peak) tan delta Laminating resin LR 385 with Hardener LH 385 DMA E Storage Modulus [MPa] 4 Onset 68,4 C E (1 Hz) MPa tan d (1 Hz) Peak 79,4 C Heat treatment: 15 h at 5 C / 122 F [ C] [ F] tan d 1,,85,7,55,4,25,1 -,5 -,2 Laminating resin LR 385 with Hardener LH 386 E Storage Modulus [MPa] 4 35 Onset 68,1 C E (1 Hz) MPa tan d (1 Hz) Peak 77,4 C Heat treatment: 15 h at 5 C / 122 F [ C] [ F] tan d 1,,85,7,55,4,25,1 -,5 -,2 Measurement conditions Coupon thickness: 2 mm Heating rate: 2 K/min Frequency: 1 Hz

8 1.1-8 DMA Measuring after heat treatment DMA-T G (peak) tan delta Laminating resin LR 385 with Hardener LH 385 DMA E Storage Modulus [MPa] E (1 Hz) MPa tan d (1 Hz) Onset 87,2 C Peak 99,3 C Heat treatment: 12 h at 8 C / 176 F [ C] [ F] tan d 1,,85,7,55,4,25,1 -,5 -,2 Laminating resin LR 385 with Hardener LH 386 E Storage Modulus [MPa] E (1 Hz) MPa tan d (1 Hz) Onset 87,9 C Peak 99,8 C Heat treatment: 12 h at 8 C / 176 F [ C] [ F] tan d 1,,85,7,55,4,25,1 -,5 -,2 Measurement conditions Coupon thickness: 2 mm Heating rate: 2 K/min Frequency: 1 Hz

9 1.1-9 DMA Measuring after heat treatment DMA-T G (peak) tan delta Laminating resin LR 385 with Hardener LH 385 DMA E Storage Modulus [MPa] tan d 4 1, 35 3 Onset 97, C Heat treatment: 4 h at 16 C / 32 F,85,7 25 E (1 Hz) MPa Peak 114,2 C,55 2,4 15,25 tan d (1 Hz) 1,1 5 -,5 -,2 [ C] [ F] Temperatur [ C] Laminating resin LR 385 with Hardener LH 386 E Storage Modulus [MPa] tan d 4 1, Heat treatment: 35,85 E (1 Hz) MPa 4 h at 16 C / 32 F 3,7 25 Onset 95,6 C Peak 111,8 C,55 2,4 15,25 tan d (1 Hz) 1,1 5 -,5 -,2 [ C] [ F] Temperatur [ C] Measurement conditions Coupon thickness: 2 mm Heating rate: 2 K/min Frequency: 1 Hz

10 1.1-1 Laminating resin LR 385 Hardener LH 385 Development of T G T G3 [ C] Heat treatment 8 C / 176 F Heat treatment 5 C / 122 F Time [h] Laminating resin LR 385 Hardener LH 386 T G3 [ C] Heat treatment 8 C / 176 F Heat treatment 5 C / 122 F Sample preparation DSC, DIN 517 Time [h]

11 Mechanical data of neat resin Mechanical data D ensity [ g/cm³ ] 1,18-1,2 F lexural strength [ N/mm² ] M odulus of elasticity [ kn/mm² ] 3,3-3, 6 T ensile strength [ N/mm² ] C ompressive strength [ N/mm² ] Elongation o f break [%] 6-8 I mpact strength [ KJ/m² ] 45-6 Water absorption at 23 C Fatigue strength under reversed bending stresses acc. to BAM Berlin 24 h [%] 7 d [%] 1 % 9 %,1,2 -,6 4 2 * * 1 Curing: 24 hat 23 C ( 74 F) + 15 hat 6 C (14 F) Typical data according to WL Parts 1 and 2 German Aviation Materials Manual. of the Advice: Mechanical data are typical for the combination of laminating resin LR 385 with hardener LH 386. Data can differ in other applications.

12 Data of reinforced resin Static tests in standard climate Mechanical data Reinforced with GRC Glass fibre CRC Carbon fibre SRC Aramide fibre Flexural strength Tensile strength Compressive strength Interlaminar shear strength [ N/mm²] [ N/mm²] [ N/mm 2 ] [ N/mm²] Modulus of elasticity GRC samples: 8 layers of glass fabric, plain, CRC samples: 9 layers of carbon fabric, SRC samples: 7 layers of aramide [ kn/mm²] g/m²,2 mm (.8 in) thick plain, 2 g/m², 2 mm (.8 in) thick fabric, 4H satin, 17 g/m², 2 mm (.8 in) thick Fibre content of samples (GRC, SRC) during Data calculated for fibre content of 43 vol% Fibre content of samples (CRC) during processing/testing: Data calculated for fibre content of 5 vol% Typical data according to WL Parts 1 and 2 of the GERMAN AVIATION MATERIALS MANUAL processing/testing: vol% vol% Curing: 24 h at 23 C (74 F) + 15 h at 6 C (14 F)