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Registered Member #480
Joined: Thu Jul 06 2006, 07:08PM
Location: North America
Posts: 644
Patrick -
No "flame war" intended or initiated.
All I was asking was:
1. If you've actually received information from multiple epoxy manufacturers regarding the use of Co2 for degassing mixed epoxy, please share the information.
2. If you've actually found silicone RTV sealants at your local (California) hardware stores that DO NOT use the "standard" corrosive acetic acid cure system, please share the information.
No flame content in that, and no obvious "inflated ego" content.
Registered Member #509
Joined: Sat Feb 10 2007, 07:02AM
Location:
Posts: 329
On the note of envirotex lite and vacuum pumps, if you intend on degassing it, it expands to ~15-30x the original volume before the head breaks. (I cant remember if it was 1 oz of A and 1oz of B that filled the 1qt container, or 1/2oz of each) It does degas nicely if you can accommodate the expansion
When doing thin layers, a butane jet lighter would probably be the best. (I dont recall seeing any amine blush on the surface from the moisture from the lighter, but i wasnt doing a big area where it would be obvious)
Registered Member #480
Joined: Thu Jul 06 2006, 07:08PM
Location: North America
Posts: 644
Microwatt -
A "Mityvac" type hand-operated vacuum pump works great for degassing epoxy, as long as your container isn't too large, and units without vacuum gages (not required) cost less than $20. These pumps are readily available from automotive supply stores, where their intended use is as vacuum sources for testing vacuuum actuators and vacuum sensors.
or
For degassing small volumes of mixed epoxy, use a glass jar large enough to hold a paper cup, and attach a tubing fitting to the lid to couple it to the hose from your hand vacuum pump. Fill the paper cup no more than half-way full of epoxy, place the cup in the jar, attach the lid, and pump away. The epoxy will initially froth and "boil", but will gradually settle down and will eventually stop bubbling.
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epoxy high voltage strength
