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I can't believe it but I have a batch of Hysol that dates back to the last century....March 15, 1996 to be precise.
As they say, curiosity killed the cat so I had to mix up a batch for old times sake. The resulting cured adhesive seemed to behave just as when new although I have not subjected it to destructive testing. Attached is some correspondence with Henkel concerning odd looking whitish globules that have taken up residence in the Part B container. Have any of you had this happen and can explain what's happening? Needless to say, I wouldn't use this adhesive now in a situation where my butt depended on it, but any other use would be ok.
Angier Ames
N4ZQ
N3ZQ
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Hello,
I showed your pictures to one of our QC chemists and below are his comments.
Regards,
Sue Zelasko
Aerospace Group
Henkel Corporation
Technical Support
925-458-8278
----- Forwarded by Sue Zelasko/US/Americas/HENKEL on 10/31/2005 12:51 PM -----
Paul J Schmidt
10/31/2005 12:27 PM
To: Sue Zelasko/US/Americas/HENKEL@HENKEL
cc:
Subject: Re: HysolLink
Sue,
Because of the age of the material, I am not sure what the white blobs are. Conceivably they could be from the high molecular weight toughener coming out of solution and perhaps the thixotropic material is agglomerating. These are possibilities.
Paul
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