I use this stuff called "electronic circuit board cleaner" made by RF Chemical technology in Australia.
Dissolves the Goo like nothing I have seen (besides acetone), but is much safer than acetone with plastics and removes flux etc. An old toothbrush is handy for the stubborn spots. I did a post on it here: http://www.vk2hmc.net/blog/?p=86 --marki -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of paul swed Sent: Saturday, 27 July 2013 11:55 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] HP Z3801 melted rubber feet. Heads up Reversion or not the goo is gone.. Plastic scraper for major stuff. Toilet paper to clean off the goo. It adheres to the goo really well. Good dose of alcohol and some qtips for the tight places. The boards and case are clean and not sticky. Back to integrating a 10544 oven in. Regards Paul. On Fri, Jul 26, 2013 at 8:24 PM, Pete Lancashire <[email protected]>wrote: > When at GE aerospace one of the departments near me spent a lot of > money analyzing what accelorated reversion. I wish I still had one of > the report that listed the usual scientific reasons such temp, ozone, > etc etc .. but one had a reference to I think included sun spots and > the temp at Stonehedge > > You take 100 samples from the same batch, and one we go to go and the > other > 99 will not. > > > > > On Fri, Jul 26, 2013 at 4:54 PM, Joseph Gwinn <[email protected]> > wrote: > > > time-nuts Digest, Vol 108, Issue 135 > > > > On Fri, 26 Jul 2013 18:58:26 -0400, [email protected] wrote: > > > Message: 5 > > > Date: Fri, 26 Jul 2013 18:58:14 -0400 > > > From: paul swed <[email protected]> > > > To: paul swed <[email protected]>, Time-nuts > > > <[email protected]> > > > Subject: [time-nuts] HP Z3801 melted rubber feet. Heads up > > > Message-ID: > > > < > > cad2jfahn4h8ldzh0sywlf-dc3uot7wfp0dwnmjnet44r1nn...@mail.gmail.com> > > > Content-Type: text/plain; charset=ISO-8859-1 > > > > > > Beginning the process of installing a hp 10544 in what had held > > > the Hp > > > 10811 temporarily by adding some wires for power to the 10544. > > > Pulled > the > > > main board out and what a mess I discovered. HP installed some > > > rubber > > feet > > > to support the main boards and they have melted and turned to gue. > Whats > > > interesting is the stuff ran all over the mainboard. Like it > > > wicked > > upward. > > > Can't be good and no idea if the stuff actually has conductivity > > > to > some > > > level in this state. Seems to clean up well with rubbing alcohol. > > > But > > will > > > be a job and many cotton swabs will give their life in the process. > > > Maybe the stuff is alive. > > > > Sounds like the feet were made of a polyurethane rubber. > > Polyurethane rubber and foam can spontaneously depolymerize, > > reverting to the goo from whence it came. High temperature and > > humidity speed things along. Google for "urethane reversion" (omit the > > quotes). > > > > Joe Gwinn > > _______________________________________________ > > time-nuts mailing list -- [email protected] To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- [email protected] To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
