Rigid polyurethane/polyisocyanurate foams containing paraffinic

Details Rigid polyurethane/polyisocyanurate foams containing paraffinic Rigid polyurethane/polyisocyanurate foams containing paraffinic

1995-01-03

1995-12-19

Dudash, Diana

Coating processes

Restoring or repairing

427244, 427373, 427393, 427421, B32B 3500, B05D 500

Patent

active

054766818

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.

REFERENCES:
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patent: 4183996 (1980-01-01), Kremer et al.
patent: 4207128 (1980-06-01), Traubel et al.
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patent: 4584233 (1986-04-01), Meader et al.
patent: 4661532 (1987-04-01), Morin
patent: 4865879 (1989-09-01), Finlay
patent: 4877829 (1989-10-01), Vu et al.
patent: 5001190 (1991-03-01), Carpenter et al.
patent: 5250651 (1993-10-01), Price
patent: 5405885 (1995-04-01), Sampara et al.

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