Abstract: An MDI system non-temperature sensitive memory sponge suitable for a flat foam foaming process is made by using a polyol mixture, which includes a polyether polyol and a polymer polyol, to react with an isocyanate and an auxiliary agent mixture that includes: a chain extender, a foaming agent, a pore adjusting agent, and a catalyst. The polyether polyol includes a polyoxypropylene glycerol with a molecular weight of 700 and a polyoxypropylene trihydroxy ether with a molecular weight of 4800, the polymer polyol includes a graft polyether, and the isocyanate is methylene diphenyl diisocyanate.

Abstract: A latex sponge made from a mixture containing the following materials in parts by weight: 100 pts. wt. of a polyether polyol, 35-75 pts. wt. of an isocyanate, 0.5-1.5 pts. wt. of a glycol, 0.2-0.6 pts. wt. of a catalyst, 1.2-1.3 pts. wt. of a silicone oil, and 1.5-3.5 pts. wt. of water that functions as a foaming agent. The isocyanate may be methylene diphenyl diisocyanate (MDI); the polyether polyol may be a graft polyether having a molecular weight about 4,800; and the catalyst may be triethylene diamine.

Abstract: A MDI system non-temperature sensitive memory sponge suitable for flat foam foaming process, is made by mainly using polyether polyol and polymer polyol as main material, then adding three additives isocyanate and foaming agent, the pore adjusting agent and catalyst. The polyether polyol is polyoxypropylene glycerol with molecular weight of 700, the polymer polyol is high activity grafting polyether, the isocyanate is modified polyphenyl methane diisocyanate, wherein a polyoxypropylene trihydroxy ether with the molecular weight of 4800 is added to the polyether polyol, polyol chain extender is added to said additives.