Rigid polyurethane/polyisocyanate foams containing paraffinic ba

Details Rigid polyurethane/polyisocyanate foams containing paraffinic ba Rigid polyurethane/polyisocyanate foams containing paraffinic ba

1992-04-22

1995-04-11

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521130, 521170, 521172, 521174, 521176, 521902, C08J 908, C08K 501

Patent

active

054058856

ABSTRACT:
The invention is a rigid polyurethane foam to which a base stock lubricating oil made of at least 55 weight percent paraffinic carbons and less than 10 weight percent aromatic carbons has been added as a hydrophobic agent protecting the polyurethane foam from reacting with environmental moisture. The foam is useful for deposit in railroad spike holes or any structural member having a cavity and where moisture within or on the cavity would otherwise react with the isocyanate to produce an uncontrollable foaming mass.

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