Is solid PU waterproof?
Is solid PU waterproof?
(OP)
Dear all,
solid polyurethane used as infill material for field joint coating is waterproof?
thanks,
rgds
NB
solid polyurethane used as infill material for field joint coating is waterproof?
thanks,
rgds
NB





RE: Is solid PU waterproof?
refer also to http://www.geocities.com/pucoating/faq1.htm
Cheers,
gr2vessels
RE: Is solid PU waterproof?
http://w
Datasheet:
http://www
http://w
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: Is solid PU waterproof?
-It all depends on whether polyester based or aliphatic urethanes are involved.
-Temperature is an important factor, above 50 degrees Celsius and polyester based will definitely give significant problems on the medium term.
-Water has a high relative high solubility in Polurethane (at least when compared to Epoxy, Vinyl Ester, PPS, PEEK etc.) and a moderate diffusion rate. Hence it is permeable, and certainly not the best candidate with this regard.
-Sometimes this product is sold with so called "Moisture Scavangers". This concept very probably does not extend the lifetime in a humid environment of this product / in this configuration.
Here is a thread on polyurethane that may also be of your interest: http://www.composite-agency.com/messages/3675.html
Good Luck,
Rodney
RE: Is solid PU waterproof?
Nicolò