US 11,655,365 B2
Polyurethane foam
Mitsuru Omoto, Anjo (JP); Tomotaka Hara, Anjo (JP); Satoshi Takayama, Anjo (JP); and Takanobu Hara, Anjo (JP)
Assigned to INOAC CORPORATION, Nagoya (JP)
Filed by INOAC CORPORATION, Nagoya (JP)
Filed on Jun. 21, 2021, as Appl. No. 17/353,147.
Application 17/353,147 is a continuation of application No. 15/559,640, granted, now 11,072,704, previously published as PCT/JP2015/082780, filed on Nov. 20, 2015.
Claims priority of application No. 2015-057921 (JP), filed on Mar. 20, 2015; and application No. 2015-130667 (JP), filed on Jun. 30, 2015.
Prior Publication US 2021/0309853 A1, Oct. 7, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C08G 18/42 (2006.01); C08L 75/06 (2006.01); C08K 5/3492 (2006.01); C08G 18/76 (2006.01); C08G 18/20 (2006.01); C08G 18/48 (2006.01); C08G 18/40 (2006.01); C08K 5/49 (2006.01); C08K 3/04 (2006.01); C08J 9/12 (2006.01)
CPC C08L 75/06 (2013.01) [C08G 18/2081 (2013.01); C08G 18/4018 (2013.01); C08G 18/4241 (2013.01); C08G 18/4837 (2013.01); C08G 18/7607 (2013.01); C08G 18/7621 (2013.01); C08G 18/7664 (2013.01); C08J 9/12 (2013.01); C08K 3/04 (2013.01); C08K 5/34922 (2013.01); C08K 5/49 (2013.01); C08G 2110/0008 (2021.01); C08G 2110/0058 (2021.01); C08G 2110/0083 (2021.01); C08G 2170/20 (2013.01); C08G 2350/00 (2013.01)] 9 Claims
 
1. A flexible polyurethane foam obtained from a polyurethane foaming raw material containing a polyol, a polyisocyanate, a foaming agent, a catalyst, and a flame retardant, wherein
the polyol contains a polyester polyol,
the polyisocyanate is a diphenylmethane diisocyanate-based isocyanate,
the flame retardant is composed of any one or both of powder flame retardants of expanded graphite and a phosphorus-based powder flame retardant and the adding amount is 20 parts by mass or more per 100 parts by mass of the polyol,
the flexible polyurethane foam has an isocyanate index of from 85 to 115,
the polyester polyol is a polymerization product having an aliphatic branched glycol and an aliphatic dicarboxylic acid as constituting units, and
the flexible polyurethane foam satisfies the following conditions:
(1) a mass ratio of the polyester polyol and a polyether polyol is from 100:0 to 80:20; and
(2) the flexible polyurethane foam has a density (JIS K7222:2005) of from 80 to 94.188.7 kg/m3.