CPC C08J 9/0061 (2013.01) [B32B 5/18 (2013.01); B32B 15/046 (2013.01); B32B 15/20 (2013.01); C08G 18/4018 (2013.01); C08G 18/4213 (2013.01); C08G 18/485 (2013.01); C08G 18/7664 (2013.01); C08J 9/0038 (2013.01); B32B 2307/3065 (2013.01); C08J 2375/06 (2013.01)] | 8 Claims |
1. A thermoset polyurethane foam made from a formulation, the formulation comprising at least one isocyanate, at least one bromine-free polyol, at least one aliphatic brominated polyether polyol, and at least one aromatic brominated polyester polyol;
the formulation being free of n-propyl bromide (nPBr) and tris(1-chloro-2-propyl) phosphate (TCPP),
the formulation comprising:
from 0.2 to 4.0 wt. % of at least one reactive aliphatic brominated polyether polyol,
from 2.0 to 7.0 wt. % of at least one aromatic brominated polyester polyol, and
from 2.0 to 7.5 wt. % of at least one flame retardant comprising organo-phosphate, organo-phosphonate, or organo-phosphite,
wherein the ratio of the amount of aliphatic bromine expressed as a percentage of total bromine to the amount of aromatic bromine expressed as a percentage of total bromine is from 10:90 to 50:50; and
wherein the foam passes ASTM E84 and UL 723 tunnel fire tests in core, faced, and slit configurations,
the thermoset polyurethane foam having a total halogen content of 1.61 to 2.55 percent.
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