Method for preparing polyurethane rubber granule mixture for pavement self-stress icebreaking
A technology of polyurethane rubber and mixture, which is applied in the field of rubber mixture, and can solve problems such as damage, ice layer fracture, and poor road performance
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Embodiment 1
[0084] The first step is to prepare two-component polyurethane glue
[0085] Ⅰ. Preparation of A component
[0086] The raw materials for preparing component A are shown in the table below,
[0087] raw material
Pure MDI
Liquefied MDI
Polyether diol
95
5
60
[0088] MDI in the above table is the abbreviation of diphenylmethane diisocyanate, the same below,
[0089] Dehydrate the polyether diol at 100°C and a vacuum of 0.08MPa for 1 hour to constant weight. After cooling to 40°C, add the melted measured pure MDI and liquefied MDI, and react at 75°C for 2 hours , analysis of the NCO content of the prepolymer reaches 12% that meets the requirements, thus obtaining the first component,
[0090] Ⅱ. Preparation of component B
[0091] The raw materials for preparing component B are shown in the table below,
[0092]
[0093] The composite polyether in the above table is prepared by adjusting the mass ratio, trihyd...
Embodiment 2
[0106] The first step is to prepare two-component polyurethane glue
[0107] Ⅰ. Preparation of A component
[0108] The raw materials for preparing component A are shown in the table below,
[0109] raw material
Pure MDI
Liquefied MDI
polyether triol
95
5
80
[0110] MDI in the above table is the abbreviation of diphenylmethane diisocyanate, the same below,
[0111] Dehydrate the polyether triol at 105°C and a vacuum of 0.08MPa for 1 hour to constant weight, cool to 45°C, then add the melted measured pure MDI and liquefied MDI, react at 78°C for 2.5 hours , analysis of the NCO content of the prepolymer reaches 12% that meets the requirements, thus obtaining the first component,
[0112] Ⅱ. Preparation of component B
[0113] The raw materials for preparing component B are shown in the table below,
[0114]
[0115] The composite polyether in the above table is prepared by adjusting the mass ratio, trihydroxy...
Embodiment 3
[0128] The first step is to prepare two-component polyurethane glue
[0129] Ⅰ. Preparation of A component
[0130] The raw materials for preparing component A are shown in the table below,
[0131] raw material
Pure MDI
Liquefied MDI
Polyether diol
95
5
100
[0132] MDI in the above table is the abbreviation of diphenylmethane diisocyanate, the same below,
[0133] Dehydrate the polyether diol at 110°C and a vacuum of 0.08MPa for 1 hour to constant weight. After cooling to 50°C, add the melted measured pure MDI and liquefied MDI, and react at 80°C for 3 hours , analysis of the NCO content of the prepolymer reaches 12% that meets the requirements, thus obtaining the first component,
[0134] Ⅱ. Preparation of component B
[0135] The raw materials for preparing component B are shown in the table below,
[0136]
[0137] The composite polyether in the above table is prepared by adjusting the mass ratio, trihy...
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