Compositions – Compositions containing a single chemical reactant or plural... – Organic reactant
Patent
1993-09-22
1995-12-26
Seidleck, James J.
Compositions
Compositions containing a single chemical reactant or plural...
Organic reactant
25218226, 25218227, 25218228, 521114, 521115, 521117, 521118, 521128, 521129, 521130, 521137, 521170, 521172, 521173, 521174, 521176, 521164, C08J 908, C08G 1818, C08G 1820, C08G 1848
Patent
active
054784948
ABSTRACT:
A polyol composition is provided which when reacted with an organic isocyanate, has good flow characteristics and makes a rigid polyurethane foam having good dimensional stability at low densities. The polyol compostion has a polyol component which must have present a polyoxyalkylene polyether polyol having an equivalent weight of 130 or less and a hydroxyl number of 400 or more, a polyoxyalkylene polyether polyol having an average functionality from 1.5 to 3.1 and a viscosity of less than 800 cP at 25.degree. C., and a polyoxyalkylene polyether polyol having an average functionality of greater than 3.1 and a viscosity of 5,000 cp or less at 25.degree. C. The polyol composition also has formic acid or a mixture of formic acid and water as blowing agents, and further contains a delayed action blow catalyst and a delayed action gel catalyst.
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Christman Donald L.
Fishback Thomas L.
Lee Thomas B.
Reichel Curtis J.
BASF Corporation
Carmen Dennis V.
Seidleck James J.
Sergent Rabon
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