eccosorb?CRS two-part castable silicone load absorber americas: +1.866.928.8181 europe: +49.(0)8031.2460.0 asia: +86.755.2714.1166 www.lairdtech.com two-part castable silicone load absorber eccosorb CRS is a series of castable, magnetically loaded, rtv silicone rubber materials with high- loss in the microwave frequency range. when fully c ured, eccosorb CRS will duplicate the electrical properties of its counterpart in the ecc osorb? mfs series. for example, eccosorb CRS- 117 is electrically equivalent to eccosorb mfs-117. being a true elastomer, eccosorb CRS, when cured, has a number of distinct advantages over rig id materials of the eccosorb mf type. for electrical and physical properties of the eccosorb CRS series, please see the datasheet on eccosorb mf. features and benefits ? 2-component castable ? low outgassing markets ? commercial telecom ? security and defense specifications typical properties eccosorb CRS-117 eccosorb CRS-124 frequency range >1 ghz >1 ghz service temperature c (f) <160 (<320) <160 (<320) density (g/cc) 4.16 4.55 thermal expansion coefficient per c (per f) 63 x 10 - 6 (35 x 10 -6) 59 x 10 - 6 (33 x 10 -6) thermal conductivity w/mk 0.9 1.0 hardness, shore a 75 75 water absorption, % 24h <0.1 <0.1 dielectric strength volts/mil >10 >10 volume resistivity, ohm-cm >10 10 >10 10 data for design engineer guidance only. observe d performance varies in application. engineers are reminded to test the material in application. applications ? eccosorb CRS can be used to cast cones, wedges and pyramids for terminations and loads. ? it can be used to fill cavities or can be painted o n surfaces to suppress the flow of currents. this product line finds use in antennas and transmi ssion lines. ? eccosorb CRS can also be poured in place to form mi crowave gaskets, where a sheet elastomer would not fit. it can also be poured around the bas e of microwave tubes to prevent undesired energy flow. ? when bonded to surfaces, eccosorb? CRS will withsta nd temperature cycling (even to cryogenic temperatures). it can be deformed and sh aped to contoured surfaces and is not subject to damage from impact or shock. availability ? eccosorb CRS is available in 2 grades : CRS-117 & c rs-124. ? eccosorb CRS is supplied as a 2-part system, consis ting of a part a(resin) and part b (catalyst). ? please contact your local supplier for available si zes and packages, as there might be some regional differences.
eccosorb?CRS 2 rfp-ds-CRS 011216 a ny information furnished by laird technologies, inc . and its agents is believed to be accurate and rel iable. all specifications are subject to change wit hout notice. responsibility for the use and applica tion of laird technologies materials rests with the end user. laird technologies makes no warranties as to the fitness, merchantability, suitability or no n- infringement of any laird technologies materials or products for any specific or general uses. lair d technologies shall not be liable for incidental o r consequential damages of any kind. all laird techno logies products are sold pursuant to the laird tech nologies terms and conditions of sale in effect fr om time to time, a copy of which will be furnished upon request. ? copyright 2015 laird technologies, inc. all rights reserved. laird, lair d technologies, the laird technologies logo, and ot her marks are trademarks or registered trademarks o f laird technologies, inc. or an affiliate company thereof. other product or service names may be the property of third parties. nothing herein provi des a license under any laird technologies or any t hird party intellectual property rights. ? it does not ship as a dangerous good. ? shelf life is approximately 6 months when stored un mixed in a well sealed container at temperatures no higher than 25c (77f). instructions for use ? mix the eccosorb CRS part a in its shipping contain er using a power stirrer to insure homogeneity. ? part a is supplied as a high viscosity paste. in al l cases a small amount of part b has to be added. ? weigh out the desired amounts of both parts in the correct mix ratio as given below. mix ratio : eccosorb CRS-117: 100 parts of a to 1.18 parts of b eccosorb CRS-124: 100 parts of a to 1.00 parts of b ? to insure void-free castings, the entrapped air sho uld be removed by vacuum de-airing. ? pour into the cavity to be filled. ? cure overnight at room temperature or for 3 hours at elevated temperatures of 80c (175 f). where use temperature is anticipated above 120c (2 48 f), a post cure is recommended. gradually raise cast parts to the use temperature o ver an 8 hour or longer period. ? if cast around inserts, they place negligible curin g pressures on them. ? the eccosorb? CRS will adhere to themselves but wil l release from most other surfaces. therefore, metal or epoxy molds are suitable for ca st shapes. if adhesion is required, a thin coat of a suitable primer should first be applied. ghz 10 - 7 10 - 6 10 - 5 10 - 4 10 - 3 10 - 2 10 - 1 1.0 3.0 8.6 10.0 18.0 CRS-117 db/c m 0 0 0 0 0 0 .03 0 .27 2 .8 11 46 56 119 db/in 0 0 0 0 0 0 .08 0 .69 7 .1 28 117 142 302 CRS-124 db/c m 0 0 0 0 0 0 .03 0 .48 6 .5 20 63 67 149 db/in 0 0 0 0 0 0 .08 1 .2 16 .51 50 160 170 378 typical attenuation *note: attenuation is a theoretical property calcu lated from the complex permittivity and complex per meability of a lossy material and is strictly a mea ns of comparing one absorbing material to another. the attenuation properties are not an indication of how the material will perform inside a microwave d evice. for further electrical and physical propert ies of the eccosorb ? CRS series, please see the typical electrical properties table on the eccosorb ? mfs technical bulletin
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