Vantico Ltd Electronic Polymers Heavy Electrical Araldite Casting Resin System Casting resin XB 5908 100 pbw Hardener XB 5909 100 pbw Cycloaliphatic, prefilled, hot-curing, two component epoxy casting resin system for outdoor applications in the medium voltage and heavy power electrical industry. High thermal shock resistance combined with high glass transition. Outdoor electrical insulating parts, as apparatus components, bushings, line post and pin insulators in the medium voltage range All components for humid indoor medium and high voltage applications Applications Automatic pressure gelation process (APG) (see our special brochure, Publ. No. 28160/e) Conventional gravity casting process under vacuum Processing methods Easy handling combined with long pot-life at moderate Short gel and demoulding time at above 140 C High tracking and arc resistance Good toughness combined with elevated glass transition Very high erosion resistivity under UV-radiation High stability of the dielectrical properties also in humid atmosphere Insulating material with excellent outdoor behaviour Properties Edition: July 2000 Replaces edition: January 1998
Product data Casting resin XB 5908 Viscous, prefilled, cycloaliphatic epoxy resin in light gray colour Viscosity at 25 C DIN 114 mpa s 50000-80000 at 40 C DIN 114 mpa s 15000-35000 Epoxy content ISO 3001 equiv/kg 2.1-2.4 Density at 25 C ISO 1675 g/cm³ 1.75-1.80 Flash point DIN 51758 C > 200 Vapour pressure at 25 C (Knudsen) Pa < 10-2 Hardener XB 5909 Viscous, prefilled, preaccelerated anhydride curing agent Viscosity at 25 C DIN 114 mpa s 14000-22000 at 40 C DIN 114 mpa s 6000-25000 Density at 25 C ISO 1675 g/cm³ 1.75-1.85 Flash point DIN 51758 C 165 Vapour pressure at 25 C (Knudsen) Pa < 3 10-1 Remarks Storage Prefilled, liquid components always show a small sedimentation, Before use, stir up carefully the components at about 50 C. The hardener XB 5909 is sensitive to humidity. Store the components at 18-25 C, in tightly sealed and dry original containers. Under these conditions, the shelf life will correspond to the expiry date stated on the label. Product specific advise regarding storage can be found on product label. After this date, the product may be processed only following reanalysis. Partly emptied containers should be closed tightly immediately after use. For information on waste disposal and hazardous products of decomposition in the event of fire, refer to the Material Safety Data Sheets (MSDS) for these particular products 2 Vantico Ltd.. July 2000 XB 5908/ XB 5909
Processing Long pot life is desirable in the processing of any casting resin system. Prefilled components help to shorten the mixing time considerably. The two components will be mixed in the desired quantity under vacuum and at slight elevated (up to 60 C). For the mixing of medium- to high viscous casting resin systems and for mixing at lower s, we recommend special thin film degassing mixers that may produce additional self-heating of 10-15 C as a result of friction. Depending on quantity, mixer device, mixing and application, the mixing time is, under a vacuum of 1 to 8 mbar, 0.25 to 1 h. The premixed components packed acc. their mixing ratio, could be used per container. In case of filler sedimentation, it's recommendable to empty the container completely. Before partial use, the content must be carefully homogenized at elevated. We recommend also the same preheating to prevent air enclosures for disloading the components. In automatic feeding and mixing installations, both components will be degased and homogenized under a vacuum of about 2-5 mbar in there holding tanks again. From time to time the prefilled products are stirred up to avoid any sedimentation and irregular metering. After dosing and mixing with a static mixer, the system is fed directly to the vacuum casting chamber or, in case of automatic pressure gelation process, directly to the hot casting mould. Over feeding tubes one can serve several individual casting stations. System Preparation The effective pot-life of the mix is about 1 to 2 days at s below 25 C. Conventional batch mixers should be cleaned once a week or at the end of work. For longer interruptions of work, the pipes of the mixing and metering installations have to be cooled and cleaned with the resin component to prevent sedimentation and/or undesired viscosity increase. Interruptions over a week-end (approx. 48h) without cleaning are possible if the pipes are cooled at s below 18 C. Viscosity increase and gel time at various s, refer to Fig.4.1 and Fig.4.4. Specific Instructions Mould APG process 130-160 C Conventional vacuum casting 80-100 C Demoulding times (depending on mould and casting volume) APG process 10-40 min Conventional vacuum casting 4-8h Cure conditions (minimal postcure) APG process 7h at 130 C or 5h at 140 C Conventional vacuum casting 14h at 130 C or 10h at 140 C To determine whether crosslinking has been carried to completion and the final properties are optimal, it is necessary to carry out relevant measurements on the actual object or to measure the glass transition. Different gel and postcuring cycles in the manufacturing process could influence the crosslinking and the glass transition respectively. Vantico Ltd.. July 2000 XB 5908/ XB 5909 3
Processing Processing Viscosities 100000 [mpa s] 80000 60000 80 C 60 C 40000 40 C 20000 0 0 0.5 1 1.5 2 3 4 6 8 12 16 20 [h] 24 Fig.4.1: Viscosity increase at 40, 60 and 80 C (measurements with Rheomat 115) (Shear rate D = 10 s -1 ) 1E5 [mpa s] 1E4 1E3 1E2 10 30 50 70 [ C] 90 Fig.4.2: Initial viscosity in function of (measurements with Rheomat 115, D = 10 s -1 ) Gelation-/Cure Times 1000 [min] 100 160 [ C] 140 120 140 C 10 1 70 90 110 130 150 [ C] 170 Fig.4.4: Geltime measured in function of (measurements with Gelnorm Instrument / DIN 16945/ 6.3.1) 100 80 60 120 C 100 C 40 1E1 1E2 1E3 [min] 1E4 Fig.4.5: Glass transition in function of cure time (isothermic reaction, IEC 1006) 4 Vantico Ltd.. July 2000 XB 5908/ XB 5909
Mechanical and Physical Properties Determined on standard test specimen at 23 C Cured for 2h at 100 C + 10h at 140 C Tensile strength ISO 527 MPa 80-95 Elongation at break ISO 527 % 1.50-1.70 E modulus from tensile test ISO 527 MPa 9300-10300 Flexural strength ISO 178 MPa 140-150 Surface strain ISO 178 % 1.8-2.0 E modulus from flexural test ISO 178 MPa 9600-10000 Impact strength ISO 179 kj/m² 10-13 Double Torsion Test CG 216-0/89 Critical stress intensity factor (KIC) MPa m ½ 2.4-2.6 Specific energy at break (GIC) J/m² 540-610 Glass transition DSC IEC 1006 C 120-135 Coefficient of linear thermal expansion DIN 53752 Fig. 5.2 Mean value for range: 20-100 C K -1 33-35 10-6 Thermal conductivity similar to ISO 8894-1 W/mK 0.75-0.85 Flammability UL 94 Thickness of specimen: 4 mm class HB Thickness of specimen: 12 mm class V-0 Water absorption (specimen: 50 50 4 mm) ISO 62 10 days at 23 C % by wt. 0.15-0.20 in boiling water at 100 C % by wt. Fig. 7.1 Decomposition (heating rate: 10K/min) DTA C 350 Density DIN 55990 g/cm³ c. 1.80 Filler load % 61 1E10 G' [Pa] 1E9 1E8 1E7 G' tan δ 1E1 tan δ 1E0 1E-1 1E-2 150 [1E-6/K] 120 90 60 30 1E6 1E-3 0-150 -100-50 0 50 100 150 200 [ C] -50 0 50 100 150 [ C] 200 Fig.5.1: Shear modulus (G') and mechanical Fig.5.2: Coefficient of linear thermal loss factor (tan δ) in function of expansion (α) in function of (ISO 6721/ DIN 53445,methode C, (DIN 53752 / reference : 23 C) measured at 1Hz) Vantico Ltd.. July 2000 XB 5908/ XB 5909 5 Alu Cu Fe
Electrical Properties Determined on standard test specimen at 23 C Cured for 2h at 100 C + 10h at 140 C Breakdown strength IEC 243-1 kv/mm -- Test specimen with encapsulated Rogowski electrodes Gap: 1 mm Ciba method kv/mm 35-38 Diffusion breakdown strength DIN/ VDE 0441/1 class HD 2 Temperature of specimen after test C < 23 HV arc resistance ASTM D 495 s 195-210 Tracking resistance IEC 112 with test solution A CTI >600-0.0 with test solution B CTI >600M-0.0 HV-tracking resistance DIN/ VDE 0441/1 class -- IEC 587/A kv -- Electrolytic corrosion DIN 53489 grade A-1 Inclined Plane Tracking and Erosion Test ASTM D 2303 Initial Tracking Voltage (i.t.v.) kv/min 3.5/50 Time to Track (t.t.t.) h > 33 16 14 12 10 tan δ [%] 8 6 ε r 4 2 0 10 50 90 130 [ C] 170 Fig.6.1: Loss factor (tan δ) and dielectric constant (εr) in function of (measurement frequency: 50 Hz / IEC 250/ DIN 53483) 1E18 [Ω cm] 1E16 1E14 1E12 1E10 1E8 10 50 90 130 [ C] 170 Fig.6.2: Volume resistivity (ρ) in function of (measurement voltage: 1000 V/ IEC 93/ DIN 53482) 6 Vantico Ltd.. July 2000 XB 5908/ XB 5909
Special Properties 10 [Gew. %] Physical Long-Term Values 1 0.1 0 50 100 150 [h] 200 Fig.7.1: Water absorption at 100 C in function of time (specimen: 50 50 4 mm, DIN 53495/1L) Vantico Ltd.. July 2000 XB 5908/ XB 5909 7
Industrial hygiene Mandatory and recommended industrial hygiene procedures should be followed whenever our products are being handled and processed. For additional information please consult the corresponding Safety Data Sheets and the brochure "Hygienic precautions for handling plastics products of Ciba Specialty Chemicals (Publ. No. 24264/e). Handling precautions Safety precautions at workplace: protective clothing gloves arm protectors goggels/safety glasses respirator/dust mask Skin protection before starting work after washing Cleansing of contaminated skin Clean shop requirements Disposal of spillage Ventilation: of workshop of workplace yes essential recommended when skin contact likely yes recommended Apply barrier cream to exposed skin Apply barrier or nourishing cream Dab off with absorbent paper, wash with warm water and alkali-free soap, then dry with disposable towels. Do not use solvents Cover workbenches, etc. with light colored paper Use disposable breakers, etc. Soak up with sawdust or cotton waste and deposit in plastic-lined bin Renew air 3 to 5 times an hour Exhaust fans. Operatives should avoid inhaling vapors. First Aid Contamination of the eyes by resin, hardener or casting mix should be treated immediately by flushing with clean, running water for 10 to 15 minutes. A doctor should then be consulted. Material smeared or splashed on the skin should be dabbed off, and the contaminated area then washed and treated with a cleansing cream (see above). A doctor should be consulted in the event of severe irritation or burns. Contaminated clothing should be changed immediately. Anyone taken ill after inhaling vapors should be moved out of doors immediately. In all cases of doubt call for medical assistance. Vantico Ltd. Electronic Polymers Registered trademark APPROVED TO ISO 9000 ff All recommendations for use of our products, wether given by us in writing, verbally, or to be implied from results of tests carried out by us are based on the current state of our knowledge. Notwithstanding any such recommendations the Buyer shall remain responsible for satisfying himself that the products as supplied by us are suitable for his intended process or purpose. Since we cannot control the application, use or processing of the products, we cannot accept responsibility therefore. The Buyer shall ensure that the in-tended use of the products will not infringe any third party's intellectual property rights. We warrant that our products are free from defects in accordance with and subject to our general conditions of supply. 25 July, 2000