Adhesives Dow Corning 3145 RTV MIL-A- 46146 Adhesive ...

1 Product Information Adhesives Dow Corning 3145 RTV MIL-A- 46146 Adhesive Sealant Gray FEATURES. 1-part, gray, non-flowing Adhesive , high tensile strength and Non-flowing elongation, enhanced thermal stability, MIL-A- 46146 and UL. Room temp cure V-0 recognized High tensile strength and elongation Enhanced thermal stability TYPICAL PROPERTIES. MIL-A- 46146 Specification Writers: Please contact your local Dow Corning sales office or your Global UL94 V-0 Dow Corning Connection before writing specifications on this product. BENEFITS. Property Unit Value Extrusion Rate g/min 121. No mixing required RT cure, no ovens required Flow Rate - Slump in Faster in-line processing with optional cm heat acceleration Can be considered for uses with Mil Spec requirements Tack-Free Time at 25 C minutes 78. Can be considered for uses needing special high temperature stability Specific Gravity (Cured) - POTENTIAL USES NVC (Non Volatile Content) % Tensile Strength psi 1035.

2 Sealing openings in modules and MPa housings kg/cm2 71. Adding mechanical stability to individual components Assembly of components on PWBs Elongation % 670. Sealing in and around wired and electrical leads Tensile Modulus psi 150. Yoke assembly MPa kg/cm2 11. APPLICATION METHODS Tear Strength (Die B) ppi 190. N/cm 132. Automated or manual needle dispense system Durometer Shore A - 51. Unprimed Adhesion - 180 Degree ppi 106. Peel Strength N/cm2 UL Flammability Classification NA 94 V-0. Shelf Life at 25 C months 12. Mil Specification NA MIL-A- 46146 . DESCRIPTION STORAGE AND SHELF unprimed adhesion to many reactive Dow Corning one-part moisture cure LIFE metals, ceramics and glass, as well as Adhesives are generally cured at room For best results, Dow Corning RTV to selected laminates, resins and temperature and in an environment of Adhesives should be stored at or plastics. However, good adhesion 30 to 80 percent relative humidity below 25 C (77 F).

3 Special cannot be expected on non-reactive eliminating the need for curing ovens precautions must be taken to prevent metal substrates or non-reactive and the associated costs of energy and moisture from contacting these plastic surfaces such as Teflon , capital. Greater than 90 percent of materials. Containers should be kept polyethylene or polypropylene. full physical properties should be tightly closed with head or air space Special surface treatments such as attained within 24 to 72 hours and minimized. Partially filled containers chemical etching or plasma treatment varies according to product. Faster should be purged with dry air or other can sometimes provide a reactive manufacturing throughput is achieve gases, such as nitrogen. Shelf life is surface and promote adhesion to however since the Adhesive and indicated by the Use Before date these types of substrates. Dow component can be handled in much found on the product label.

4 Corning brand Primers can be used shorter times of about 10 to 120 to increase the chemical activity on minutes depending on the Adhesive difficult substrates. Poor adhesion selected and the amount of applied. PREPARING SURFACES may be experienced on plastic or These Adhesives are not typically All surfaces should be thoroughly rubber substrates that are highly used in highly confined spaces or cleaned and/or degreased with Dow plasticized, because the mobile where a deep section cure is required Corning brand OS Fluids, naphtha, plasticizers act as release agents. as they generally cure from the mineral spirits, methyl ethyl ketone Small-scale laboratory evaluation of exposed surface inward at a rate of (MEK) or other suitable solvent. all substrates is recommended before inch per seven days. Cure Solvents such as acetone or isopropyl production trials are made. progresses from the outer exposed alcohol (IPA) do not tend to remove surface and is dependent on the oils well, and any oils remaining on the surface may interfere with USEFUL TEMPERATURE.

5 Moisture in the air. Working time is RANGES. generally a few minutes to an hour adhesion. Light surface abrasion is recommended whenever possible, For most uses, silicone elastomers for these products until a surface skin should be operational over a begins to form. Mild heat below 60 C because it promotes good cleaning and increases the surface area for temperature range of -45 to 200 C (- (140 F) may be used to increase 49 to 392 F) for long periods of time. through-put by accelerating the cure. bonding. A final surface wipe with acetone or IPA is also useful. Some However, at both the low- and high Dow Corning silicone Adhesives temperature ends of the spectrum, retain their original physical and cleaning techniques may provide better results than others; users behavior of the materials and electrical properties over a broad performance in particular applications range of operating conditions which should determine the best techniques for their particular applications.

6 Can become more complex and enhance the reliability of and service require additional considerations. For life of electronic devices. The stable low-temperature performance, chemistry and versatile processing SUBSTRATE TESTING thermal cycling to conditions such as options of these Adhesives offer Due to the wide variety of substrate -55 C (-67 F) may be possible, but benefits for a variety of electronics types and differences in substrate performance should be verified for needs from increasing component surface conditions, general statements your parts or assemblies. Factors that safety and reliability, reducing total on adhesion and bond strength are may influence performance are cost or increasing the performance impossible. To ensure maximum configuration and stress sensitivity of envelope of devices or modules. bond strength on a particular components, cooling rates and hold substrate, 100 percent cohesive times, and prior temperature history.

7 PACKAGING failure of the Adhesive in a lap shear At the high-temperature end, the RTV Adhesives are typically or similar Adhesive strength test is durability of the cured silicone packaged in 100 ml syringes and 330 desired. This ensures compatibility of elastomer is time and temperature ml cartridges, 1 kg tubs and pails (18 the Adhesive with the substrate being dependent. As expected, the higher - 25 kg). In general, Dow Corning considered. Also, this test can be used the temperature, the shorter the time Adhesives /sealants are supplied in to determine minimum cure time or the material will remain useable. nominal , , 18- and 200-kg can detect the presence of surface (1-, 8-, 40- and 440-lb) containers, contaminants such as mold release agents, oils, greases and oxide films. SOLVENT EXPOSURE. net weight. Not all products may be When liquid or vapor solvent or fuel available in all packages and some exposure can occur in an application, additional packages, such as a bladder ADHESION the silicone Adhesive discussed in this packs or tubes, may be available for Dow Corning silicone Adhesives are brochure is intended only to survive certain package sizes.

8 Specially formulated to provide splash or intermittent exposures. It is information should not be used in PHYSICAL AND HEALTH. not suited for continuous solvent or substitution for customer's tests to HAZARD INFORMATION. THE. fuel exposure. Testing should be ensure that Dow Corning 's products MATERIAL SAFETY DATA. done to confirm performance of the are safe, effective, and fully SHEET IS AVAILABLE ON THE. Adhesives under these conditions. satisfactory for the intended end use. DOW Corning WEBSITE AT. Suggestions of use shall not be taken , OR. HEALTH AND as inducements to infringe any patent. FROM YOUR DOW Corning . Dow Corning 's sole warranty is that REPRESENTATIVE, OR. ENVIRONMENTAL the product will meet the Dow DISTRIBUTOR, OR BY CALLING. INFORMATION Corning sales specifications in effect YOUR GLOBAL DOW Corning . To support customers in their at the time of shipment. Your CONNECTION. product safety needs, Dow Corning exclusive remedy for breach of such has an extensive Product Stewardship warranty is limited to refund of organization and a team of Product For More Information purchase price or replacement of any To learn more about these and other Safety and Regulatory Compliance product shown to be other than as (PS&RC) specialists available in each products available from Dow warranted.

9 DOW Corning Corning , please visit the Dow area. For further information, please SPECIFICALLY DISCLAIMS ANY. see our website, Corning Electronics website at OTHER EXPRESS OR IMPLIED electronics. , or consult WARRANTY OF FITNESS FOR A. your local Dow Corning PARTICULAR PURPOSE OR. representative. MERCHANTABILITY. DOW. Corning DISCLAIMS. LIMITATIONS LIABILITY FOR ANY. These products are neither tested nor INCIDENTAL OR. represented as suitable for medical or CONSEQUENTIAL DAMAGES. pharmaceutical uses. SAFE HANDLING. LIMITED WARRANTY INFORMATION. INFORMATION PLEASE PRODUCT SAFETY. READ CAREFULLY INFORMATION REQUIRED FOR. The information contained herein is SAFE USE IS NOT INCLUDED IN. offered in good faith and is believed THIS DOCUMENT. BEFORE. to be accurate. However, because HANDLING, READ PRODUCT. conditions and methods of use of our AND MATERIAL SAFETY DATA. products are beyond our control, this SHEETS AND CONTAINER. LABELS FOR SAFE USE, Dow Corning and Sylgard are registered trademarks of Dow Corning Corporation.

10 All other trademarks or brand names are the property of their respective owners. 2006 Dow Corning Corporation. All rights reserved. Printed in USA Form No. 11-1182A-01.