coating resin degass - whats going wrong ?

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coating resin degass - whats going wrong ?

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benet	benet posted 12 Years Ago HOT Topic Details
Group: Forum Members Posts: 59, Visits: 373	Prior to applying a finishing layer of coating resin i thought it would be a good idea to degass it as ive been getting micro bubbles that collect polish. However for me the degassing process seems to add more bubbles than it get rid of. Curently Im poring this resin by hand, "tipping out" with a brush and then using a heat gun to pop bubbles. which is OK but id like todegass first. here are some pics. Mixed Coating Resin prior to de-gassing Resin during degassing - i left it like this for 2 or 3 minutes until the bubbles collapsed - then locked off the pump and vented the chamber vacum reading resin after venting .... after waiting 5 mins to see if the bubbles float out.... i tried degassing it again and again but it didnt improve, so after an hour, by which time it had started to warm warm up. i binned it and used the old method. What is going wrong ? Thanks Ben
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benet	benet posted 12 Years Ago HOT Post Details
Group: Forum Members Posts: 59, Visits: 373	What i cant get over is that although my vacuum level seems really good on the gauge my process never looks as thorough or violent as in this video. http://www.youtube.com/watch?v=9sN0KT-tRsY does degassing usually work this well ? Ben
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Matthieu Libeert	Matthieu Libeert posted 12 Years Ago HOT Post Details
Group: Forum Members Posts: 955, Visits: 3.4K	what I mostly do is put the mixed resin into an oven at 50°C before degassing... the resin is then less viscious and easier to degass... while degassing I get the same bubbles but after a while the most bubbles are gone Matthieu Libeert Founder MAT2 Composites X Sports website: www.mat2composites.com
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benet	benet posted 12 Years Ago HOT Post Details
Group: Forum Members Posts: 59, Visits: 373	matthieutje65 (23/09/2013) while degassing I get the same bubbles but after a while the most bubbles are gone Thanks Mat, by "the same bubbles" are you referring to the bubbles i get or the bubbles in the you tube vide? Also, how long would you heat the resin for at 50* ? After trying the process again i managed to get rid of nearly all the bubbles by degassing for about 15 mins and shaking the chamber to get the bubbles to dissipate. I then used the resin to good effect, it was definitely an improvement on un-degassed resin and to my surprise set without any blush. Is that also a consequence of de-gassing.
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Matthieu Libeert	Matthieu Libeert posted 12 Years Ago HOT Post Details
Group: Forum Members Posts: 955, Visits: 3.4K	The same bubbles you get I mostly put it into an oven for around 30min, It reduces working time but I mostly have more than enough time! watch at 2:10min you'll see the same thing you had "behind the scenes" I've cheated a bit and put the resin into the oven and did it again and got the results you see in the video after the degassing Matthieu Libeert Founder MAT2 Composites X Sports website: www.mat2composites.com
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