RTV31 MOMENTIVE | Alldatasheet

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Technical content

RTV31, RTV60, RTV88 Page 1 of 5 Silicone Rubber Compounds for High Temperature Product Description RTV31, RTV60 and RTV88 silicone rubber compounds are high temperature two-part silicone elastomers. They are supplied ready-to-use with a base compound and DBT (dibutyl tin dilaurate) as the standard curing agent. DBT is suitable for most applications, however other catalysts are available to facilitate deep section cure, faster cure and automated mixing. RTV31, RTV60 and RTV88 silicone rubber compounds differ primarily in viscosity in the uncured state. Key Performance Properties

  • Variable work times and cure rates by adjusting the amount and type of curing agent
  • Room temperature cure
  • Composition free of solvents and solvent odour
  • Excellent adhesion capabilities with primer
  • Excellent release properties
  • Retention of elastomeric properties at temperatures from -54°C up to 260°C continuously, and up to 316°C for short periods of time Applications Typical high temperature applications for these products include, but are not limited to:
  • Potting and encapsulating electric motors and transformers
  • Fabrication of rubber parts
  • Casting moulds for low-melting point metals
  • Release applications such as rubber rollers
  • Thermal insulation Typical Product Data UNCURED PROPERTIES OF RTV BASE COMPOUNDS RTV31 RTV60 RTV88 Colour Red Red Red Consistency Pourable Pourable Spreadable Paste Viscosity, mPa-s 25,000 47,000 880,000 Specific Gravity, g/cm³ 1.42 1.48 1.47 UNCURED PROPERTIES OF RTV BASE WITH 0.5% DBT CURING AGENT ADDED RTV31 RTV60 RTV88 Work Time @ 25C, hrs 2 2 0.75 Cure Time @ 25C, hrs 24 24 24

RTV31, RTV60, RTV88 Page 2 of 5 CURED PROPERTIES (0.5 wt. % DBT Curing Agent added, cured 7 days at 25C and 50% R.H.) RTV31 RTV60 RTV88 Mechanical Hardness, Shore A Durometer 54 57 58 Tensile Strength, MPa 6.0 7.0 6.0 Elongation, % 170 120 120 Tear Strength, kN/m 5.0 7.0 8.0 Shrinkage, % 0.6 0.6 0.6 Electrical Dielectric Strength, kV/mm (1.9 mm thick) 17.0 17.7 17.4 Dielectric Constant @ 1000 Hz 4.4 4 4.3 Dissipation Factor @ 1000 Hz 0.03 0.02 0.03 Volume Resistivity, ohm-cm 1.6 x 10 14 4.4 x 10 14 2.8 x 10 14 Thermal Useful Temperature Range,° C -54 to 260 -54 to 260 -54 to 260 Thermal Conductivity, W/m-K 0.31 0.31 0.31 Coefficient of Expansion, cm/cm, ° C 20 x 10 -5 20 x 10 -5 20 x 10 -5 Specific Heat, cal/gm, ° C 0.35 0.35 0.35 Specifications Typical product data values should not be used as specification. Assistance and specifications are available by contacting Momentive performance materials Technical Service RTV1 and RTV2. Instructions for Use Mixing Select a mixing container 4 to 5 times larger than the volume of RTV silicone rubber compound to be used. Weigh out the RTV silicone rubber base compound and add the appropriate amount of curing agent. 0.5% DBT by weight will provide a work time or pot life of about one hour and a cure time of 24 hours. 0.5% DBT is the most commonly used concentration of curing agent for RTV31, RTV60 and RTV88 silicone rubber compounds. The pot life may be lengthened by using less DBT (as little as 0.1% DBT). MEASURING GUIDE FOR CURING AGENT ADDITION RTV Weight Dibutyl Tin Dilaurate Concentration 0.1% 0.5% 100 grams 5 drops 25 drops 454 grams (1 lb.) 23 drops 115 drops (2.27 grams)

RTV31, RTV60, RTV88 Page 3 of 5 With clean tools, thoroughly mix the RTV base compound and the curing agent, scraping the sides and bottom of the container carefully to produce a homogeneous mixture. When using power mixers, avoid excessive speeds which could entrap large amounts of air or cause overheating of the mixture, resulting in shorter pot life. Deaeration Air entrapped during mixing should be removed to eliminate voids in the cured product. Expose the mixed material to a vacuum of 10-20 mbar. The material will expand, crest, and recede to about the original level as the bubbles break. Degassing is usually complete about two minutes after frothing ceases. When using the RTV silicone rubber compound for potting, a deaeration step may be necessary after pouring to avoid capturing air in complex assemblies. Curing Using DBT curing agent at a level of 0.5%, these RTV silicone rubber compounds will cure in 24 hours at 25° C and 50% relative humidity to form durable, resilient rubbers. Under these conditions a pot life of about one hour will typically be available for pouring and working with the catalyzed material. Pot life may be increased by refrigerating the mixed material at 0° C after catalyzing. Cure times may be shortened by using mild heat up to 93° C maximum. A choice of curing agents is available for use with RTV31, RTV60 and RTV88 silicone rubber compounds. CuringAgent Cure Speed Curing Agent Concentration Features DBT moderate 0.1-0.5% standard STO fast 0.1-0.5% small volume

applications

RTV9811 moderate 5-10% good deep section cure suitable for automatic mixing RTV9950 moderate 5-10% suitable for automatic mixing RTV9910 slow 10% suitable for automatic mixing Deep Section Cure If these RTV silicone rubber compounds are to be used in deep sections at temperatures over 150° C, the cured product should be properly conditioned prior to service. Following room temperature cure of 1-3 days, a typical program would be eight hours at 50° C intervals from 100° C to the service temperature. Longer times at each temperature will be required for larger parts or very deep sections.

RTV31, RTV60, RTV88 Page 4 of 5 Bonding If adhesion is an important application requirement, RTV31, RTV60 and RTV88 silicone rubber compounds require a primer to bond to non- silicone surfaces. Thoroughly clean the substrate with a non-oily solvent such as naphtha or methyl ethyl ketone (MEK) and let dry. Then apply a uniform thin film of a suitable silicone primer such as SS4004P and SS4155 silicone primer and allow the primer to air dry for one hour or more. Finally, apply freshly catalyzed RTV silicone rubber compound to the primed surface and cure as recommended. Handling and Safety Material Safety Data Sheets are available upon request from Momentive performance materials. Similar information for solvents and other chemicals used with the Momentive performance materials products should be obtained from your supplier. When solvents are used, proper safety precautions must be observed. Storage and Warranty Period The warranted shelf life will be indicated by the ' use before date' on the associated documents with a minimum of 4 months when stored in the original unopened containers at following temperatures : RTV 31 and RTV 60 : 2 – 10 °C RTV88 : < -18 °C Availability RTV31/60/88 are available in 227 kg drums for which the catalyst needed has to be ordered separately. Further in 450 g, 5.5 kg and 23 kg containers all supplied with the DBT amount needed to catalyze the material. If other catalysts are desired for a specific application this should be ordered separately.

RTV31, RTV60, RTV88 DISCLAIMER: THE MATERIALS, PRODUCTS AND SERVICES OF MOMENTIVE PERFORMANCE MATERIALS INC., MOMENTIVE PERFORMANCE MATERIALS USA INC., MOMENTIVE PERFORMANCE MATERIALS ASIA PACIFIC PTE. LTD., MOMENTIVE PERFORMANCE MATERIALS WORLDWIDE INC., MOMENTIVE PERFORMANCE MATERIALS GmbH & Co. KG, MOMENTIVE PERFORMANCE MATERIALS SUISSE Sarl, THEIR SUBSIDIARIES AND AFFILIATES DOING BUSINESS IN LOCAL JURISDICTIONS (collectively “SUPPLIERS”), ARE SOLD BY THE RESPECTIVE LEGAL ENTITY OF THE SUPPLIER SUBJECT TO SUPPLIERS’ STANDARD CONDITIONS OF SALE, WHICH ARE INCLUDED IN THE APPLICABLE DISTRIBUTOR OR OTHER SALES AGREEMENT, PRINTED ON THE BACK OF ORDER ACKNOWLEDGMENTS AND INVOICES, AND AVAILABLE UPON REQUEST. ALTHOUGH ANY INFORMATION, RECOMMENDATIONS, OR ADVICE CONTAINED HEREIN IS GIVEN IN GOOD FAITH, SUPPLIERS MAKE NO WARRANTY OR GUARANTEE, EXPRESS OR IMPLIED, (i) THAT THE RESULTS DESCRIBED HEREIN WILL BE OBTAINED UNDER END-USE CONDITIONS, OR (ii) AS TO THE EFFECTIVENESS OR SAFETY OF ANY DESIGN INCORPORATING SUPPLIERS’ PRODUCTS, MATERIALS, SERVICES, RECOMMENDATIONS OR ADVICE. AFOREMENTIONED EXCLUSIONS OR LIMITATION OF LIABILITY ARE NOT APPLICABLE TO THE EXTENT THAT THE END-USE CONDITIONS AND/OR INCORPORATION CONDITIONS CORRESPOND TO THE RECOMMENDED CONDITIONS OF USE AND/OR OF INCORPORATION AS DESCRIBED BY SUPPLIER IN ITS PRODUCT DATA SHEET AND/OR PRODUCT SPECIFICATIONS. EXCEPT AS PROVIDED IN SUPPLIERS’ STANDARD CONDITIONS OF SALE, SUPPLIERS AND THEIR REPRESENTATIVES SHALL IN NO EVENT BE RESPONSI BLE FOR ANY LOSS RESULTING FROM ANY USE OF ITS MATERIALS, PRODUCTS OR SERVICES DESCRIBED HEREIN. Each user bears full responsibility for making its own determination as to the suitability of Suppliers’ materials, services, r ecommendations, or advice for its own particular use. Each user must identify and perform all tests and analyses necessary to assure that its finished parts incorporating Supp liers’ products, materials, or services will be safe and suitable for use under end-use conditions. Nothing in this or any other document, nor any oral recommendation or advi ce, shall be deemed to alter, vary, supersede, or waive any provision of Suppliers’ Standard Conditions of Sale or this Disclaimer, unless any such modification is specifically agreed to in a writing signed by Suppliers. No statement contained herein concerning a possible or suggested use of any material, product, service or design is intended, or should be construed, to grant any license under any patent or other intellectual property right of Suppliers or any of its subsidiaries or affiliates coverin g such use or design, or as a recommendation for the use of such material, product, service or design in the infringement of any patent or other intellectual property right. Copyright 2007 Momentive Performance Materials, Inc. All rights reserved. 7/25/07 - EU-50-068-00 Page 5 of 5 PRINCIPAL LOCATIONS – Regional Information North America World Headquarters

187 Danbury Road

Wilton, CT 06897, USA T 800.295.2392 F 607.754.7517 Latin America Rodovia Eng. Constâncio Cintra, Km 78,5 Itatiba, SP – 13255-700, Brazil Europe, Middle East, Africa and India D-51368 Leverkusen Germany T 00.800.4321.1000 T +31.164.293.276 F +31.164.241.750 Pacific Akasaka Park Building - 5-2-20 Akasaka Minato-ku, Tokyo 107-6112 Japan CUSTOMER SERVICE CENTERS Charleston, WV 25314, USA E cs-na.silicones@momentive.com

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