TECHNET Archives

July 2018

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Douglas Pauls <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Douglas Pauls <[log in to unmask]>
Date:
Tue, 17 Jul 2018 12:45:30 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (101 lines)
NMP is already considered an SVHC.


Doug Pauls
Principal Materials and Process Engineer
Rockwell Collins

On Tue, Jul 17, 2018 at 12:06 PM, Dennis Fritz <[log in to unmask]>
wrote:

> NMP is climbing the ladder, both in the USA and Europe, toward
> regulation.   Be careful.
>
> On Tue, Jul 17, 2018 at 12:55 PM Steve Gregory <[log in to unmask]> wrote:
>
> > Hi Kate,
> >
> > Stripping Urethane coating as you know is very difficult to strip. If you
> > have a stripper that works well on the urethane, you then have to be
> > careful whether or not it will affect any other material on the
> assembly. I
> > found one that doesn't have potassium hydroxide in it. I've never used
> it,
> > so I don't know how well it works:
> >
> > https://www.miller-stephenson.com/product/conformal-coating-stripper/
> >
> > These are the ingredients:
> >
> > Material
> > CAS No.                    Approx. %
> > 1,1,1,2,2,3,4,5,5,5-Decafluoropentane (HFC-43-10mee)
> > 138495-42-8               22 - 30%
> > Trans,1.2-Dichloroethylene
> > 156-60-5                     45 - 50%
> > Methanol
> > 67-56-1                       4 - 10%
> > N-Methyl-2-Pyrrolidone
> > 872-50-4                     18 - 22%
> >
> > When we had a big project where we had to rework a bunch of boards that
> > were urethane coated, it was an engineering change where we had to remove
> > and replace parts on boards that were urethane coated we purchased a
> > micro-abrasion station from a company called CCR Co.
> >
> > http://www.ccrco.com/
> >
> > I think I remember it being recommended by a Lockheed engineer. Anyways
> the
> > station worked great. The media used in the station is ESD safe which is
> > something you need to worry about when using a media-blasting station.
> > Urethane is best stripped when it is aged a bit. When it is freshly
> applied
> > the beads tend to bounce off. I remember if they didn't strip well I
> would
> > put them into an oven for a few hours to make the coating become a little
> > harder so it would strip easier.
> >
> > Steve
> >
> > On Tue, Jul 17, 2018 at 5:45 AM, Ekaterina Stees <
> [log in to unmask]
> > >
> > wrote:
> >
> > > Hello Technetters,
> > > Does anyone know of a chemical remover for urethane conformal coat that
> > > does not use potassium hydroxide as it's active ingredient?
> > >
> > > Thanks,
> > > Kate
> > >
> >
> >
> >
> > --
> > Steve Gregory
> > Kimco Design and Manufacturing
> > Process Engineer
> > (208) 322-0500 Ext. -3133
> >
> > --
> >
> >
> >
> > This email and any attachments are only
> > for use by the intended
> > recipient(s) and may contain legally privileged,
> >  confidential, proprietary
> > or otherwise private information. Any
> > unauthorized use, reproduction,
> > dissemination, distribution or other
> > disclosure of the contents of this
> > e-mail or its attachments is strictly
> >  prohibited. If you have received
> > this email in error, please notify the
> >  sender immediately and delete the
> > original.
> >
>

ATOM RSS1 RSS2