Polyol composition, method for preparing polyurethane foam using the same, and polyurethane foam prepared by the method

A method for preparing a polyurethane foam, the method comprising:

• mixing and reacting, in a primary reaction, a polyol composition with a first isocyanate, followed by foaming, to provide a primary reaction mixture;
• and
• mixing and reacting, in a secondary reaction, the primary reaction mixture with a second isocyanate to provide a secondary reaction mixture,
• wherein the polyol component includes a polyol component having a base polyol and a synthetic polyol, a chain extender, a foaming agent, and a cell stabilizer,
• wherein the synthetic polyol is prepared by polymerizing a mixture of polypropylene glycol, propylene oxide and carbon dioxide,
• wherein the synthetic polyol includes 8% by weight to 15% by weight of carbon dioxide,
• wherein the synthetic polyol has an average molecular weight of 4,000 to 6,000 g/mol,
• wherein the polyol component includes the synthetic polyol in a specific weight percent of 2 wt %, 4 wt %, or 5 wt %, and includes the base polyol as a remaining amount,
• wherein the cell stabilizer is present in a specific parts by weight (pbw) of 1 pbw, 1.5 pbw, or 2 pbw, based on 100 parts by weight of the polyol component, and
• wherein the synthetic polyol includes a derived structure of the polypropylene glycol represented by Formula 1′ below:
• wherein * is attached to a structure derived from propylene oxide and carbon dioxide.

A polyurethane foam prepared by a reaction of components comprising:

• a polyol composition having a polyol component including comprising—a base polyol and a synthetic polyol, a chain extender, a foaming agent, and a cell stabilizer;
• a first isocyanate;
• and
• a second isocyanate,
• wherein the polyol composition has been mixed with the first isocyanate, followed by a foaming, to provide a primary reaction mixture,
• wherein the primary reaction mixture has been mixed with the second isocyanate to provide the polyurethane foam,
• wherein the synthetic polyol is prepared by polymerizing a mixture of polypropylene glycol, propylene oxide and carbon dioxide,
• wherein the synthetic polyol comprises 8% by weight to 15% by weight of carbon dioxide,
• wherein the synthetic polyol has an average molecular weight of 4,000 to 6,000 g/mol,
• wherein the polyol component includes the synthetic polyol in a specific weight percent of 2 wt %, 4 wt %, or 5 wt %, and includes the base polyol as a remaining amount,
• wherein the cell stabilizer is present in a specific parts by weight (pbw) of 1 pbw, 1.5 pbw, or 2 pbw, based on 100 parts by weight of the polyol component, and
• wherein the synthetic polyol includes a derived structure of the polypropylene glycol represented by Formula 1′ below:
• wherein * is attached to a structure derived from propylene oxide and carbon dioxide.