Flame-retardant polyurethane foam
AssigneeDdp Specialty Electronic Materials US, LLC
InventorsKali Ananth Suryadevara, Mark W. Beach, Dakai Ren
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Abstract
A thermoset foam comprises from 0.2 to 4.0 wt. % of at least one 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.
Claims8
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.
Dependencies are inferred from the claim text.