VU 4453/101 WR, blue thixotropic:

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Dominic Harrell
6 years ago
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Lackwerke Peters GmbH + Co KG Hooghe Weg 13, D-47906 Kempen Internet: www.peters.de E-Mail: peters@peters.

1 Lackwerke Peters GmbH + Co KG Hooghe Weg 13, D Kempen Internet: peters@peters.de Telefon ( ) Telefax ( ) Ein Unternehmen der PETERS-Gruppe LP E-3 / e.003 TR TECHNICAL Wepuran casting compounds REPORT 1 compliant: RoHS WEEE ELV lead-free Produkt für die Optoelektronik Contents 1. General information Application Special notes Safety recommendations Characteristics Properties General properties Physical and mechanical properties Electrical properties Dielectric properties Processing Mixing Viscosity adjustment... 6 of the series VU 4453 Base: Polyurethane resin (PUR) highly elastic very low heat development and low shrinkage pressure in the curing phase particularly suited for sensitive electronic components (e. g. sensors, glass diodes, etc.) extremely low water absorption This technical report is valid for the following adjustments: low viscosity:, black,,, grey medium viscosity: VU 4403/61 HE, grey-beige, black, VU 4453/71 SHE, high viscosity VU 4453/101 WR, thixotropic:, Indices: VU = casting compound, opaque HE = highly elastic NV = low viscosity LT = long pot life SHE = very highly elastic T = thixotropic WR = water resistant 7.3 Auxiliary products Manual processing Mechanical processing Drying/Curing Standard packaging Shelf life and storage conditions Further literature/technical publications Further products for the production of pcbs Further products for the electronics/ electrical engineering industries...9 Please read this technical report, the material safety data sheet according to directive 1991/155/EEC and the Technical Information sheet TI 15/2 (see item 7) carefully before using the product

2 1. General information The Wepuran casting compounds of the series VU 4453 are solvent-free, highly elastic 2-pack casting compounds based on polyurethane resin that already cure at room temperature. All symbols that are used in this technical data sheet and on our containers, such as explained on our website in the section Service Symbols on labels., are 2. Application The Wepuran casting compounds of the series VU 4453 are electrically insulating, protect against corrosion caused by climatic and moisture influences as well as against mechanical attack and are temperature resistant up to 90 C [194 F]. They were especially developed for the electronics/electrical engineering industries and are used to encapsulate, embed or cast electronic components and assemblies. On account of their high elasticity and very low volume and shrinkage pressure, the Wepuran casting compounds of the series VU 4453 are particularly suitable for high-quality, temperature- and shocksensitive electronic components (e. g. sensors, glass diodes, ferrite cores, etc.) due to the low heat development during curing and the fact that their elasticity in operation means that material tension resulting from temperature changes is reduced. Further applications are possible such as: Components for sensor technology, opto- and automotive electronics Heat sensors, heating elements, cup capacitors, mini and print transformers, cables and cableend connections Ignition, induction and transformer coils TV picture tubes (implosion protection) Batteries and accumulator cases High voltage cascades and cables for TV technology HF parts, e.g. high frequency coils, interference filters. 3. Special notes The Wepuran casting compounds of the series VU 4453 are particularly distinguished by a high flexibility and elasticity (Index HE = highly elastic) and very low shrinkage pressure after curing and thus can replace the considerably more expensive silicone-rubber casting compounds in many applications if a high elasticity (e. g. sensor technology), but not a high temperature stability is required. The Wepuran casting compounds of the series VU 4453 can be used in a temperature range of -40 up to +90 C [-40 up to 194 F], while at the lower and upper ends of this range the performance and reliability of the material can be negatively affected in some applications. In these cases additional pre-trials and tests are required. Furthermore, the Wepuran casting compounds of the series VU 4453 are distinguished by an extremely low water absorption and good flowability; especially the low viscosity adjustments (Index NV) therefore are suitable to cast component geometries that are difficult to access. Moreover,, and offer a longer pot life (Index LT). is ideally suitable for dispenser application; on account of its thixotropic adjustment (Index T) there is virtually no running out of cable ducts, terminals, etc. after casting. VU 4453/71 SHE is very highly elastic (Index SHE). VU 4453/101 WR is distinguished by exceptionally high water and hydrolytic resistance (WR = water resistant), good adhesion to non-ferric metals and high mechanical resistance and thus is especially suitable for use under water. 2

3 Besides the Wepuran casting compounds of the series VU 4453 a whole range of casting compounds based on polyurethane resin, epoxy resin and silicone-rubber in various colour, viscosity and elasticity adjustments as well as with self-extinguishing properties (UL registered) are available. For exceptionally high demands on temperature stability a number of silicone-rubber casting compounds are available that meet the thermal class 200 = 200 C [392 F]. Special technical reports for these products are available upon request. In our report manual these reports are filed under group 3 and 4. On our report manual CD you will find technical reports in the Product section. 4. Safety recommendations! Please read our material safety data sheet according to directive 1991/155/EEC where you will find detailed specifications of safety precautions, environmental protection, waste disposal, storage, handling, transport as well as other characteristics.! When using chemicals, the common precautions should be carefully noted. 5. Characteristics Colour/ appearance Viscosity* at 20 C [68 F] ISO 3219 Component A Component B mixture Density at 20 C [68 F] ISO Component A Component B mixture Pot life of mixture at C [ F] (Start-up temperature 20 C [68 F]; set-up quantity 500 g) black 1100 ± 200 mpas 1000 ± 200 mpas 0.93 ± 0.05 g/cm³ 0.99 ± 0.05 g/cm³ approx. 80 min 1000 ± 100 mpas 1000 ± 150 mpas 0.94 ± 0.05 g/cm³ 1.00 ± 0.05 g/cm³ approx. 35 min 1200 ± 200 mpas 1000 ± 200 mpas 0.94 ± 0.05 g/cm³ 1.00 ± 0.05 g/cm³ approx. 85 min grey 1100 ± 200 mpas 1000 ± 200 mpas 0.98 ± 0.05 g/cm³ 1.03 ± 0.05 g/cm³ approx. 85 min VU 4403/61 HE greybeige 2900 ± 300 mpas 2700 ± 300 mpas 1.00 ± 0.05 g/cm³ 1.03 ± 0.05 g/cm³ approx. 50 min black 2700 ± 300 mpas 2500 ± 300 mpas 1.00 ± 0.05 g/cm³ 1.03 ± 0.05 g/cm³ approx. 45 min 2500 ± 200 mpas 2400 ± 200 mpas 1.02 ± 0.05 g/cm³ 1.05 ± 0.05 g/cm³ approx. 50 min VU 4453/71 SHE 2000 ± 200 mpas 2000 ± 200 mpas 1.01 ± 0.05 g/cm³ 1.04 ± 0.05 g/cm³ approx. 70 min VU 4453/101 WR ± 3000 mpas** ± 3000 mpas** 1.03 ± 0.05 g/cm³ 1.05 ± 0.05 g/cm³ approx. 85 min ± 5000 mpas** ± mpas** 1.27 ± 005 g/cm³ 1.26 ± 0.05 g/cm³ approx. 50 min 3

4 * measured with Haake RS 600, C 35/1, D = 100 s-1, viscosity measuring unit supplied by: Dieselstraße Thermo Electron (Karlsruhe) GmbH (formerly Haake-Messtechnik GmbH + Co) 4, Karlsruhe, Germany Phone +49 (0) ; Fax +49 (0) ** measured with Haake RS 600, C 20/1, D = 50 s Properties The Wepuran casting compounds of the series VU 4453 are distinguished by the following properties: 6.1 General properties do not contain any substances listed in the RoHS directive 2002/95/EC, the end-of-life vehicle directive 2000/53/EC and the WEEE directive 2002/96/EC comply with the United States EPA 33/50 program [This program by the EPA (Environmental Protection Agency) aims for a reduction in the use of certain substances that are hazardous to the environment and health.] already cure at room temperature with very low heat development (approx C [ F], 500 g) solvent-free; therefore no attack of solvent-sensitive plastics like polystyrene as well as no dissolving of enamelled wires, no unpleasant odour caused by solvents very low volume shrinkage, thus low shrinkage pressure on cast components good adhesion to almost all substrates high elasticity to reduce material stress caused by thermal shocks excellent protection from shock, impact and vibration very good climatic resistance (moisture, condensation), extremely low water absorption good resistance to numerous chemicals, acids, lyes, oils and solvents excellent dielectric properties over a temperature range from 40 up to +90 C [ F] good thermal conductivity. 6.2 Physical and mechanical properties Property Test method VU 4403/61 HE VU 4453/71 SHE VU 4453/101 WR Shore-A hardness* Shore-D hardness* DIN ± 5 60 ± 5 50 ± 5 65 ± 5 85 ± 5 DIN < 30 Water absorption DIN (24 h/23 C) approx % approx % approx % 0.05 % approx % Thermal class Based on DIN IEC Y = 90 C [194 F] * after 14 days storage at room temperature (18 23 C [ F]) 4

5 6.3 Electrical properties Property Test method VU 4403/61 HE VU 4453/71 SHE VU 4453/101 WR Dielectric strength* VDE 0303, part 21 DIN EN kv/mm 47 kv/mm 36 kv/mm 30 kv/mm 39 kv/mm Surface resistance* VDE 0303, part 30 DIN IEC x Ohm Volume resistivity* VDE 0303, part 30 DIN IEC x Ohm x cm 3.5 x Ohm x cm 8 x Ohm x cm 5 x Ohm x cm 6 x Ohm x cm Tracking resistance* DIN EN CTI > 600** * after 14 days storage at room temperature (18 23 C [ F]) ** CTI = Comparative Tracking Index 6.4 Dielectric properties For the Wepuran casting compound the following values for loss factor tan δ and dielectric constant factor ε r were determined in accordance with VDE 0303 part 4. For all other adjustments, values are similar. Frequency Temperature Loss factor tan δ Dielectric constant factor ε r 50 Hz 1 khz 1 MHz 23 C [73.4 F] 23 C [73.4 F] 23 C [73.4 F] Hz 1 khz 1 MHz 60 C [140 F] 60 C [140 F] 60 C [140 F] Hz 1 khz 1 MHz 90 C [194 F] 90 C [194 F] 90 C [194 F] Processing! Please read our Technical Information sheet TI 15/2 Selection criteria and processing instructions for casting compounds/casting resins for more detailed information on processing. In our report manual, this Technical Information sheet is filed under group 15. On our report manual CD and on our website you will find Technical Information sheets in the Service section. Stir before using 5

6 Since the many different permutations make it impossible to evaluate the whole spectrum (parameters, reactions with materials used, chemical processes and machines) of processes and subsequent processes in all their variations, the parameters we recommend are to be viewed as guidelines only. We advise you to determine the exact process limitations within your production environment, in particular as regards compatibility with your specific follow-up processes, in order to ensure a stable fabrication process and products of the highest possible quality. The specified product data is based upon standard processing/test conditions of the mentioned norms and must be verified observing suitable test conditions on processed printed circuit boards. Feel free to contact us if you have any questions or for a consultation with our application technology department. 7.1 Mixing The index behind the oblique indicates the mixing ratio of the resin component A with the hardener component B in parts by weight. The components are mixed in the following ratios: VU 4403/61 HE VU 4453/71 SHE Parts by weight Component A : Component B 4 : 1 6 : 1 7 : 1 VU 4453/101 WR 10 : 1 The two components (resin component A and hardener component B) are already packed in the correct mixing ratio. The volume of the container of component A is sufficient to accommodate the total quantity of component B.! Mix both components in the indicated mixing ratio (see also item 7.4 "Manual Processing"). For mixing we recommend using mechanical stirring equipment. Our Technical Information sheet TI 15/10: Processing of 2-pack systems gives detailed advice on correct mixing. In our report manual, the Technical Information sheet TI 15/10 is filed under group 15. On our report manual CD and on our website you will find Technical Information sheets in the Service section. In order to avoid penetration of moisture as far as possible seal opened containers carefully after use. Use up opened containers as soon as possible. 7.2 Viscosity adjustment The Wepuran casting compounds of the series VU 4453 are processed in the condition supplied. Do not add solvents or thinners to reduce the viscosity. 6

7 7.3 Auxiliary products Accelerator B 4401 The pre- and final curing time as well as the processing time is reduced by adding accelerator B Due to this fact it should only be used in case of processing by means of mixing and dispensing units. The accelerator is stirred into component A and then component B is added. Sealing mastic EH For the sealing of casting moulds and for cable outlets, we recommend our sealing mastic EH , which is solvent-free, self-adhesive, permelastic, easily deformable and highly temperature-resistant. Mould release agent EH Polyurethane resins adhere well to almost all substrates. In order to be able to remove the casting compound from the mould after curing, the surfaces of the components to be casted must be pretreated with the mould release agent EH EH is solvent-, siliconeand grease-free. Cleaning agent R For cleaning work place and tools, we recommend using our cleaning agent R Cleaning should take place immediately after processing, as cleaning becomes increasingly difficult the further the curing process progresses and is impossible after complete curing. Do not use cleaning agent as a thinner or for washing hands since solvents remove the natural grease from skin. Special technical reports for these products are available on request. In our report manual, these technical reports are filed under groups 4 and Manual processing! Choose compound quantity only as large as can be processed within pot life (see item 5 Characteristics ). Viscosity increases extremely in this time period so that after this time period casting compound can no longer be processed.! While mixing ensure that no air is stirred in since air inclusions influence final properties of casting compound.! Mix components A and B thoroughly.! In order to remove possible air inclusions, evacuate casting compound, if possible, before or after potting. 7.5 Mechanical processing When using mixing and dispensing equipment the pot life is irrelevant. For volumetric mixing and dispensing equipment:! Since the mixing ratio is indicated in parts by weight, the corresponding quantities to be dispensed must be converted with the help of the specific gravities of component A and component B. Note that the values indicated in item 5 are valid for a temperature of 20 C [68 F]. Reliable manufacturers of such equipment can be named upon request. 8. Drying/Curing The casting compound is cured after approx. 24 hours to such an extent that it is no more liquid or sticky and the item can be processed. However, the final hardness only is attained after 14 days. Curing can be accelerated considerably by applying heat. However, when choosing the temperature, the heat-sensitivity of the item in question must be taken into account. The following specifications for a quantity of 25 g serve as a guidline: 7

8 Room temperature (18-23 C [ F]) 80 C [176 F] 125 C [257 F] Tack-free 24 h 1 h 20 min Final hardness 14 days 6 h 3.5 h 9. Standard packaging The Wepuran casting compounds of the series VU 4453 are packed for delivery as follows: Component A Component B Selling unit 4 buckets of 4 kg 4 cans of 1 kg 20 kg VU 4403/61 HE 4 buckets of 3.6 kg 4 cans of 0.6 kg 16.8 kg 4 buckets of 3.6 kg 4 cans of 0.6 kg 16.8 kg 1 drum of 24 kg 1 can of 4 kg 28 kg 4 buckets of 3.6 kg 4 cans of 0.6 kg 16.8 kg 1 drum of 24 kg 1 can of 4 kg 28 kg VU 4453/71 SHE 1 bucket of 7 kg 1 can of 1 kg 8 kg VU 4453/101 WR 1 bucket of 7 kg 1 can of 1 kg 8 kg 1 drum of 35 kg 1 can of 5 kg 40 kg 4 buckets of 5 kg 4 cans of 0.5 kg 22 kg 1 bucket of 10 kg 1 can of 1 kg 11 kg Partial lots of the selling unit may be ordered, but will entail surcharges to cover repackaging costs. 10. Shelf life and storage conditions Labels on containers show shelf life and storage conditions. Shelf life: In sealed original containers at least 9 months +5 C +25 C Storage conditions: +5 C to +25 C [+41 F to +77 F] Protect against humidity For warehousing reasons, isolated cases may occur where the shelf life upon shipment is less than the shelf life indicated in this technical report. However, it is ensured that our products have at least two-thirds of their shelf life remaining when they leave our company. 11. Further literature/technical publications In addition to the recommendations given in this technical report, we can provide technical papers and information sheets written and compiled by members of our staff. A list of the technical publications available can be found in TI 15/101 E (technical papers) and TI 15/100 E (technical information sheets). In our report manual all technical information sheets (TI s) are filed under group 15. Alternatively, visit our website at or click on the "Service" section on our report manual CD. 8

9 12. Further products for the production of pcbs Technical Report of the series VU 4453 We offer a wide range of etch resists (photoimageable, UV curing, conventional curing), plating resists, solder resists (photoimageable, UV curing, conventional curing) as well as peelable solder masks, marking inks (photoimageable, UV curing, conventional curing), carbon-conductive inks, via hole fillers (purely thermal curing), thick film fillers, plugging pastes, heatsink pastes, special strippers for solder resists and further auxiliary products for screen printing (e. g. cleaning agents, thinners). Special technical reports are also available for these products and can be provided on request. On our report manual CD you will find technical reports in the "Products" section. 13. Further products for the electronics/ electrical engineering industries We boast a wide range of conformal coatings, thick film lacquers, silicone gels, casting compounds, casting resins, electro pastes, insulating lacquers, impregnating varnishes, adhesive lacquers and auxiliary products for electronics. Special technical reports are also available for these products and can be provided on request. On our report manual CD you will find technical reports in the "Products" section. Any questions? We would be pleased to offer you advice and assistance in solving your problems. Free samples and technical literature are available upon request. The above information as well as advice given by our Application Technology Department whether in verbal or written form or during product evaluations is provided to the best of our knowledge, but must be regarded as non-binding recommendations, also with respect to possible third-party proprietary rights. The products are exclusively intended for the applications indicated in the corresponding technical data sheets. The advisory service does not exempt you from performing your own assessments, in particular of our material safety data sheets and technical information sheets, and of our products as regards their suitability for the applications intended. The application, use and processing of our products and of the products manufactured by you based on the advice given by our Application Technology Department are beyond our control and thus entirely your responsibility. The sale of our products is effected in accordance with our current terms of sale and delivery. Lackwerke Peters GmbH + Co KG Hooghe Weg 13, Kempen Internet: peters@peters.de Phone: Fax:

Index: VT = casting compound, transparent KK = crystal-clear

Index: VT = casting compound, transparent KK = crystal-clear Wepesil casting resin VT 3602 KK Base: organo-poly-siloxane crystal-clear, highly transparent addition cross-linking, thus suitable for hermetically encapsulated environments highly transparent even in