Electronics Forum: 1a33 cure (Page 1 of 2)

Urethane Coating (1A33)

Electronics Forum | Wed Aug 27 17:12:34 EDT 2008 | mikesewell

Silicone contamination could appear as fisheyes or dark spots under UV light. 1A33 can be heat cured but is a single component oxygen cure coating - it needs a source of oxygen to cure. An unvented oven may slow or limit the cure. Check out the TDS

Urethane Conformal Coatings

Electronics Forum | Fri Aug 07 16:45:35 EDT 2020 | duso02

All URs require a long time to fully cure. And actually, most users do not reach full-cure before using the board. Even Humiseal 1A33 will be dry enough to handle after a very short time.

Re: AR vs. UR

Electronics Forum | Thu Mar 25 19:19:08 EST 1999 | Graham Naisbitt

I am looking into replacing another business division's Acrylic coating process with our Urethane coating process. Unfortunately, MIL-I-46068 doesn't differentiate AR/UR's performance, and the MFR data sheets don't match up at all (they each spec

Re: AR vs. UR

Electronics Forum | Fri Mar 26 13:02:18 EST 1999 | Scott McKee

Sorry, in the following message I'm agreeing with Graham - not Greg... I am looking into replacing another business division's Acrylic coating process with our Urethane coating process. Unfortunately, MIL-I-46068 doesn't differentiate AR/UR's p

Bubbles in Conformal Coating

Electronics Forum | Tue Feb 03 13:47:59 EST 2009 | grics

I would also suggest looking at your ramp rate in the cure oven. We noticed that accelerated heating increased the "gas out" of the solvent. We run 1A33 and and do not exceed a .5/degC ramp rate.

Urethane Coating (1A33)

Electronics Forum | Tue Aug 26 15:39:49 EDT 2008 | kpm135

I am not positive about this but I have been told that you cannot use acrylic and urethane coatings in systems that have had silicone run through them. It was explained to me that you can never fully get the silicone out of the existing system and th

Re: AR vs. UR

Electronics Forum | Mon Mar 29 04:36:49 EST 1999 | Graham Naisbitt

Just for the record folks, The customer I believe may be manufacturing stuff for refuelling rigs of various forms. This being the case, the coating would need to be resistant against fuels and oils. The UR material (at least ours!) is able to resi

Re: AR vs. UR

Electronics Forum | Mon Mar 29 19:17:47 EST 1999 | Scott McKee

How true, AR would not be the right choice... Scott Just for the record folks, The customer I believe may be manufacturing stuff for refuelling rigs of various forms. This being the case, the coating would need to be resistant against f

Re: AR vs. UR

Electronics Forum | Fri Mar 26 12:59:51 EST 1999 | Scott McKee

I am looking into replacing another business division's Acrylic coating process with our Urethane coating process. Unfortunately, MIL-I-46068 doesn't differentiate AR/UR's performance, and the MFR data sheets don't match up at all (they each spe

Urethane Coating (1A33)

Electronics Forum | Mon Aug 25 14:55:51 EDT 2008 | grics

I have a question for the manufacturing masters... We are going to start running test trials/DOE of a Urethane Coating (Humiseal 1A33) and I am not sure what to expect. From what I understand, urethane coating is pretty difficult to work. It is supp

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