Polyol composition having good flow and formic acid blown rigid

Details Polyol composition having good flow and formic acid blown rigid Polyol composition having good flow and formic acid blown rigid

1995-12-15

1998-06-23

Sergent, Rabon

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521115, 521116, 521118, 521128, 521130, 521155, 521174, 521176, C08J 908, C08J 904, C08G 1848, C08G 1818

Patent

active

057706352

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 composition 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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