Technical Data Sheet QSil550 (QSil550) 2-Part Addition Cure Encapsulant Introduction QSil550 is a 2-component, silicone elastomer system specially Property Test Method Value designed for electronic potting applications. It offers good protection against impact damage and can be Uncured Product employed in areas where low flammability is a prerequisite. Colour A Part: Beige The cured product is a hard, medium to high modulus elastomer that Colour B Part: Black can be repaired. Appearance: Viscous Liquid The component parts have relatively low viscosities and are readily Viscosity A Part: Brookfield 6000 mPa.s mixed in a simple 1:1 ratio. Viscosity B Part: Brookfield 6000 mPa.s Catalysed viscosity Brookfield 6000 mPa.s Pot Life: 30 minutes * Key Features SG APart 1:1 Mix Ratio SG BPart Moderate Thermall Conductivity Solvent Free * measured at 23+/-2C and 65% relative humidity UL94 V0 Approved file No. E205830 Cured Elastomer (after 7 days cure at 23+/-2C and 65% relative humidity) Use and Cure Information Colour Grey How to Use Tensile Strength: BS903 Part A2 3.40 MP IMPORTANT: QSil550 contains the platinum catalyst, great care Elongation at Break : BS903 Part A2 120 % should be taken when using automatic dispensing equipment. Modulus at 100% Strain: BS903 Part A2 2.00 MPa Please ensure that it is not contaminated by residual hydride Hardness: ASTM D 2240-95 55 Shore A containing rubber in the dispensing equipment, as curing will result. Specific Gravity: BS 903 Part A1 1.41 If in doubt, its advised to thoroughly purge the equipment with a Thermal Conductivity: 0.37 W/m suitable hydrocarbon solvent or silicone fluid. Coefficient of Thermal Expansion: Volumetric 700 ppm / C Mix both the A and B parts gently to ensure homogeneity. Place the Linear 233 ppm / C required amount of A and B parts by weight at the ration of 1:1 (A to Min. Service Temperature: -55C B) in a clean plastic or metal container of approximately 3 times their Max. Service Temperature: AFS 1540B 275 C volume, and mix until the colour of the mixture is uniform. Degas by intermittent evacuation, the larger volume of the mixing Electrical Properties vessel helps prevent overflow during this operation. In case of Surface Resistivity automatic dispensing with static mixing head, the two components Volume Resistivity: ASTM D-257 2.6E+14 .cm should be degassed before processing. Recommended vacuum Dielectric Strength: ASTM D-149 17.5kV/mm conditions are 30-50 mbar intermittently over 5-10 minutes. Dielectric Constant at 1 kHz: ASTM D-150 2.90 Cast the mixture either by gravity or pressure injection. Curing Conditions The following table offers a guide to the rate of cure of QSil550 at Flammability UL94 V-0 Rated Yes various temperatures, mixing of the components between 15 and 25C is recommended to ensure adequate pot life for degassing and Adhesion handling. The pot life can be extended to several hours by chilling Self Bonding No the components. All values are typical and should not be accepted as a specification. Temperature, C Max Cure Time 25 24 hrs Health and Safety - Material Safety Data Sheets available on 100 7 mins request. Inhibition of Cure Packages ACC Addition encapsulants are supplied in a range of Great care must be taken when handling and mixing all addition pack sizes please contact the sales office for details cured silicone elastomer systems, that all the mixing tools (vessels and spatulas) are clean and constructed in materials which do not Arrangements can be made to supply in other pack sizes. interfere with the curing mechanism. The cure of the rubber can be inhibited by the presence of compounds of nitrogen, sulphur, Storage and Shelf Life Expected to be 24 months in original, phosphorus and arsenic organotin catalysts and PVC stabilizers unopened containers below 30C epoxy resin catalysts and even contact with materials containing certain of these substances e.g. moulding clays, sulphur vulcanised Revision Date: 21/05/2013 rubbers, condensation cure silicone rubbers, onion and garlic. The information and recommendations in this publication are to the best of our knowledge reliable. However nothing herein is to be construed as a warranty or representation. Users should make their own tests to determine the applicability of such information or the suitability of any products for their own particular purposes. Statements concerning the use of the products described herein are not to be construed as recommending the infringement of any patent and no liability for infringement arising out of any such use is to be assumed. ACC Silicones Ltd, Amber House, Treco S.R.L., Via Romagna N.8, Showground Road, Bridgwater, Somerset, UK 20098 Sesto Ulteriano (MI), Italia. Tel. +44(0)1278 411400 Fax. +44(0)1278 411444 Tel. 39/02/9880913 Fax. +39/02/98280413 www.acc-silicones.com X-ON Electronics Largest Supplier of Electrical and Electronic Components Click to view similar products for Chemicals category: Click to view products by ACC Silicones manufacturer: Other Similar products are found below : HANDPAD 1624-10S 3045-QT 3065-15S 3125-9S 5200-WHITE-3OZ 70008073302 1398159-1 S1255-04-34X100FT 3748-Q-58 x8 FO- 25DT 13844 S1009-KIT-A-CS8606 8361-P 2216-GRAY-2OZ DP100-200ML 1743-2FP 2310-10 VERSIL406 826-450G SS4120-1P 3789-Q 9729 9223 9176 600-0510 3748PG 04952-00531-00 04952-00533-00 10-50L 3748-Q-5/8 X8 3764-TC 3M 9087 3M 9088 AS1700 120-320 BLR-15ML HYBRICX 35C 7552 7558 3748-V-O-Q-5/8 X8 3764-Q 3779-TC 3797TC 3M 9086 100500F00000G 101800F00000G 1610-5G 1610-G4 1621-5G