Technical Data Sheet QSil553 (QSil553) Thermally Conductive Silicone Encapsulant Introduction QSil553 is a 2-component, silicone elastomer system specially Property Test Method Value designed for electronic potting applications. Uncured Product It offers good protection against impact damage and can be Colour A Part: Beige employed in areas where low flammability is a prerequisite. Colour B Part: Black The cured product is a hard, medium to high modulus elastomer that Appearance: Viscous Liquid can be repaired. Viscosity A Part: Brookfield 5000 mPa.s The component parts have relatively low viscosities and are readily Viscosity B Part: Brookfield 3500 mPa.s mixed in a simple 1:1 ratio. Catalysed viscosity Brookfield 4500 mPa.s Pot Life: 180 minutes * SG APart 1.6 Key Features SG BPart 1.6 Thermally Conductive * measured at 23+/-2C and 65% relative humidity 1:1 Mix ratio Moderately Low Viscosity Cured Elastomer Low Modulus (after 7 days cure at 23+/-2C and 65% relative humidity) UL( V) approved file No. E205830 Colour Grey Tensile Strength: BS903 Part A2 1.20 MP Use and Cure Information Elongation at Break : BS903 Part A2 175 % How to Use Youngs Modulus: MPa IMPORTANT: QSil553 contains the platinum catalyst, great care Modulus at 100% Strain: BS903 Part A2 0.60 MPa should be taken when using automatic dispensing equipment. Hardness: ASTM D 2240-95 32 Shore A Please ensure that it is not contaminated by residual hydride Specific Gravity: BS 903 Part A1 1.6 containing rubber in the dispensing equipment, as curing will result. Thermal Conductivity: 0.68 W/m If in doubt, its advised to thoroughly purge the equipment with a Coefficient of Thermal Expansion: suitable hydrocarbon solvent or silicone fluid. Volumetric 650 ppm / C Linear 217 ppm / C Mix both the A and B parts gently to ensure homogeneity. Place the Min. Service Temperature: -55C required amount of A and B parts by weight at the ration of 1:1 (A to Max. Service Temperature: AFS 1540B 260 C B) in a clean plastic or metal container of approximately 3 times their volume, and mix until the colour of the mixture is uniform. Electrical Properties Degas by intermittent evacuation, the larger volume of the mixing Surface Resistivity vessel helps prevent overflow during this operation. In case of Volume Resistivity: ASTM D-257 3.26E+14 .cm automatic dispensing with static mixing head, the two components Dielectric Strength: ASTM D-149 >18kV/mm should be degassed before processing. Recommended vacuum Dielectric Constant at 1 kHz: ASTM D-150 3.41 conditions are 30-50 mbar intermittently over 5-10 minutes. Dissipation Factor ASTM D-150 0.00496 Cast the mixture either by gravity or pressure injection. Curing Conditions The following table offers a guide to the rate of cure of QSil553 at Flammability various temperatures, mixing of the components between 15 and UL94 V-0 Rated Yes 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