Patent ID: 6861454

Claim:
Raw materials for polyurethane foams comprising: 100 weight parts of a mixed polyol, over the entire weight of said mixed polyol, consisting of 45˜60 wt. % of polyol (a) obtained by polymerization of an organic oxide using sorbitol of a hexa-valent functional group as an initiator, 15˜35 wt. % of polyol (b) obtained by polymerization of an organic oxide using toluene diamine (T.D.A.) of a tetra-valent functional group as an initiator, 2.5˜7.5 wt. % of polyol (c) obtained by polymerization of an organic oxide using an ester of a penta-valent functional group as an initiator, 10˜15 wt. % of polyol (d) obtained by polymerization of an organic oxide using glycerin of a tri-valent functional group as an initiator, 140˜180 weight parts of an isocyanate; 1.0˜3.0 weight parts of a catalyst; 1.0˜2.5 weight parts water; 30.0˜35.0 weight parts of a foam blowing agent; and 1.0˜3.0 weight parts of an additive, wherein the OH values of each polyol are 460 for polyol (a), 350 for polyol (b), 330 for polyol (c), and 280 for polyol (d).