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Tech Talks with Max: Low CTE Adhesive

Max targets precise bonding in optical applications in his latest Tech Talk. He introduces EP42HT-2LTE, a two part epoxy with an exceptionally low coefficient of thermal expansion, superior dimensional stability, and a high-strength profile.

Topics:
Materials

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    Transcript

    00:00:04 hi max this is olivia from optics or us hi olivia it's great to hear from you what can i do for you today i'm calling about a bonding application for an optical assembly we're using glass and ceramic based substrates and since these materials have a low coefficient of thermal expansion we need an adhesive that offers low shrinkage a low cte and a rigid cure you should also

    00:00:28 be aware that precise alignment of these materials post cure is critical the adhesive must have minimal flow due to the geometry of the components i see what have you tried so far we were using a highly flexible adhesive and found that there were some movement post cure so precise alignment was not achieved this could have resulted from temperature fluctuations not only that

    00:00:51 the material flowed too much for us to control the alignment prior to cure are there other performance properties that are important yes the bond must offer good strength as well as superior dimensional stability max what would you recommend ep42ht-2lte is an innovative epoxy with an ultra-low coefficient of thermal expansion

    00:01:13 after mixing the consistency is that of a paste with some flow it also has several other properties that you mentioned i think it would work well hi max great news after using ep42ht-2 lte we successfully attained a very rigid dimensionally stable bond with an extremely low cte that closely matched our substrates that seemed to solve the alignment issue

    00:01:41 the epoxy maintained alignment during temperature fluctuations tests the thick paste-like consistency solved the flow problem finally we realized much better mechanical strength than we did with the flexible adhesive that is great news olivia i'm so glad we were able to improve your optical bonding application

    00:02:00 if you have any more applications please call us