Skinning amine blush


Author
Message
thanasiss3
thanasiss3
Supreme Being (116 reputation)Supreme Being (116 reputation)Supreme Being (116 reputation)Supreme Being (116 reputation)Supreme Being (116 reputation)Supreme Being (116 reputation)Supreme Being (116 reputation)Supreme Being (116 reputation)Supreme Being (116 reputation)
Group: Forum Members
Posts: 18, Visits: 348
Hi everyone,i skin parts for automotive interiors with cf using the ec high temp epoxy resin,after the wrapping i wet the fabric with epoxy,after 24hours i sand with 120grit and after that add 2 layers of epoxy when the first is at tack free stage.
After that i put the parts in an oven and ramp the temp at 100celcius,after that i have too much amine blush,it can stick to my hand,is this normal?
Is there any chance  the epoxy to keep blushing under the 2k clearcoat and give me a yellowish pary?
I must wait more time to cure after the complete cycle at the oven?
Dravis
Dravis
Supreme Being (5.1K reputation)Supreme Being (5.1K reputation)Supreme Being (5.1K reputation)Supreme Being (5.1K reputation)Supreme Being (5.1K reputation)Supreme Being (5.1K reputation)Supreme Being (5.1K reputation)Supreme Being (5.1K reputation)Supreme Being (5.1K reputation)
Group: Forum Members
Posts: 592, Visits: 1.9K
Sounds a bit strange to me ... I have never had Amine blush problems with the High-temp resin -- ???  But it does take a very long time to cure completely .. I have only used high temp for skinning once, and had no problems. It was cured at 50 -60 deg. C. for 24 hours + a bit -- Then postcured at 100 for 2 hours, just to raise the Tg a bit.. (Non critical part)

"Sapere Aude"... Dare to KNOW!

The written word is the only truly efficient vehicle for transmitting a complex concept from mind to mind...

103% of all people do not understand statistics...

Do not adjust our mind, theres a fault in reality :-)
thanasiss3
thanasiss3
Supreme Being (116 reputation)Supreme Being (116 reputation)Supreme Being (116 reputation)Supreme Being (116 reputation)Supreme Being (116 reputation)Supreme Being (116 reputation)Supreme Being (116 reputation)Supreme Being (116 reputation)Supreme Being (116 reputation)
Group: Forum Members
Posts: 18, Visits: 348
http://www.talkcomposites.com/Uploads/Images/d9a03e00-c156-40df-9903-a86e.jpg
What can cause the 'yellowish' of the carbon skinned glovebox ?this epoxy is easycomposites high temp epoxy,post cured at 90celcius,carefully remove the amine blushand then 2k clearcoated
The other parts are skinned with other epoxy resin
And they are  cleared with the same 2kclearcoat

the glovebox is new and never see the sunlight,the other parts are 1year old under the hot greek sun
Edited 10 Years Ago by thanasiss3
Warren (Staff)
Warren (Staff)
Supreme Being (22K reputation)Supreme Being (22K reputation)Supreme Being (22K reputation)Supreme Being (22K reputation)Supreme Being (22K reputation)Supreme Being (22K reputation)Supreme Being (22K reputation)Supreme Being (22K reputation)Supreme Being (22K reputation)
Group: Administrators
Posts: 2.5K, Visits: 8.5K
The high temperature resin is not perfectly colourless to begin with. It is a slight pale amber in colour. That is probably what you can see in certain light on that part.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant
VVS
VVS
Supreme Being (1.9K reputation)Supreme Being (1.9K reputation)Supreme Being (1.9K reputation)Supreme Being (1.9K reputation)Supreme Being (1.9K reputation)Supreme Being (1.9K reputation)Supreme Being (1.9K reputation)Supreme Being (1.9K reputation)Supreme Being (1.9K reputation)
Group: Moderators
Posts: 226, Visits: 334
I agree with Warren in that the ht resin is not water clear.

can I ask why you've used it on the box, would have thought normal laminating resin would have been ok.
thanasiss3
thanasiss3
Supreme Being (116 reputation)Supreme Being (116 reputation)Supreme Being (116 reputation)Supreme Being (116 reputation)Supreme Being (116 reputation)Supreme Being (116 reputation)Supreme Being (116 reputation)Supreme Being (116 reputation)Supreme Being (116 reputation)
Group: Forum Members
Posts: 18, Visits: 348
In greece under a hot summer day i measure 85 celcious into the car,it became extremely hot and the other clear resins i used,made a heavy  print through,i post curedbthem but their tg was 60-70,so they became printed through.
I post cure thw ht resin at 95celsious so the parts stay glass reflection alla the time!

'Low' tg resin 

http://www.talkcomposites.com/Uploads/Images/efa8214a-549b-4f25-9870-089.jpeg
Edited 10 Years Ago by thanasiss3
GO

Merge Selected

Merge into selected topic...



Merge into merge target...



Merge into a specific topic ID...




Similar Topics

Reading This Topic

Explore
Messages
Mentions
Search