초록 ▼

A method of manufacturing asphalt foam comprising the steps of preparing polyether polyol containing 15 mole % or more of ethylene oxide, preparing urethane prepolymer by making the polyether polyol react with organic isocyanate, and obtaining asphalt foam by mixing the urethane prepolymer with (i)

A method of manufacturing asphalt foam comprising the steps of preparing polyether polyol containing 15 mole % or more of ethylene oxide, preparing urethane prepolymer by making the polyether polyol react with organic isocyanate, and obtaining asphalt foam by mixing the urethane prepolymer with (i) a silicone oil and (ii) an aqueous emulsion of asphalt to obtain an asphalt foam having a five cell structure and excellent water repellancy.

대표청구항 ▼

A method of manufacturing asphalt foam comprising the steps of: preparing a polyether polyol containing at least 15 mole % of ethylene oxide; reacting said polyether polyol with an organic isocyanate to form a urethane prepolymer; and mixing said urethane prepolymer with (i) a silicone oil and (ii)

A method of manufacturing asphalt foam comprising the steps of: preparing a polyether polyol containing at least 15 mole % of ethylene oxide; reacting said polyether polyol with an organic isocyanate to form a urethane prepolymer; and mixing said urethane prepolymer with (i) a silicone oil and (ii) an aqueous emulsion of asphalt to form an asphalt foam having a fine cell structure and improved water repellancy; said silicone oil is mixed in an amount from 0.5 to 20 parts by weight based on 100 part by weight of said aqueous emulsion of asphalt; and said polyurethane prepolymer is mixed in an amount from 50 to 250 parts by weight based on 100 parts by weight of said aqueous emulsion of asphalt.