US 11,674,010 B2
Flame-retardant polyurethane foam
Kali Ananth Suryadevara, Saginaw, MI (US); Mark W. Beach, Midland, MI (US); and Dakai Ren, Lake Jackson, TX (US)
Assigned to DDP SPECIALTY ELECTRONIC MATERIALS US, LLC, Wilmington, DE (US)
Filed by DDP SPECIALTY ELECTRONIC MATERIALS US, LLC, Wilmington, DE (US)
Filed on Jan. 25, 2022, as Appl. No. 17/583,339.
Application 17/583,339 is a division of application No. 16/778,301, filed on Jan. 31, 2020, granted, now 11,267,945.
Prior Publication US 2022/0145032 A1, May 12, 2022
Int. Cl. C08J 9/00 (2006.01); B32B 5/18 (2006.01); B32B 15/04 (2006.01); B32B 15/20 (2006.01); C08G 18/40 (2006.01); C08G 18/42 (2006.01); C08G 18/48 (2006.01); C08G 18/76 (2006.01)
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.