Coal asphalt material for paving high-grade road and preparation method of coal asphalt material
A technology of coal tar pitch and high grade is applied in the field of coal tar pitch material for grade road paving and its preparation. The effect of simple modification process
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[0028] Example 1:
[0029] Step 1: Take 150 parts by weight of medium and low temperature coal tar pitch and heat it to obtain a viscous substance at a temperature of 120°C;
[0030] Step 2: Add 5 parts by weight of plasticizer, stir for 1 hour, then transfer to a round bottom flask, add 10 parts by weight of acid anhydride compound, and react at 120°C for 2 hours;
[0031] Step 3: Adding 5 parts by weight of polyethylene glycol, reacting for another 2 hours, and dehydrating to obtain a high-grade coal pitch material for road paving.
[0032] In step 1, select medium and low temperature coal pitch with a softening point of 65°C;
[0033] In step 2, the plasticizer is selected from an anthracene oil, two anthracene oil, mixed anthracene oil, and dioctyl phthalate;
[0034] In step 2, the acid anhydride compound is selected from maleic anhydride and tung oil anhydride;
[0035] In step three, polyethylene glycol is selected from PEG 300 and PEG 400.
Example Embodiment
[0036] Example 2:
[0037] Step 1: Take 150 parts by weight of medium and low temperature coal tar pitch and heat it to obtain a viscous substance at a temperature of 135°C;
[0038] Step 2: Add 15 parts by weight of plasticizer, stir for 1 hour, then transfer to a round bottom flask, add 15 parts by weight of acid anhydride compound, and react at 150°C for 2 hours;
[0039] Step 3: Adding 10 parts by weight of polyethylene glycol, reacting for another 2 hours, and dehydrating to obtain a high-grade coal pitch material for road paving.
[0040] In step 1, select medium and low temperature coal pitch with a softening point of 80°C;
[0041] In step 2, the plasticizer is selected from the group consisting of dioctyl terephthalate, octyl tridecyl phthalate, dicyclohexyl phthalate, trioctyl trimellitate, and triglyceride trimellitate ester;
[0042] In step 2, the acid anhydride compound is selected from the group consisting of paulownia anhydride, polyazelaic anhydride, and trimellitic anh...
Example Embodiment
[0044] Example 3:
[0045] Step 1: Take 150 parts by weight of medium and low temperature coal tar pitch and heat it to obtain a viscous substance at a temperature of 150°C;
[0046] Step 2: Add 25 parts by weight of plasticizer, stir for 1 hour, then transfer to a round bottom flask, add 20 parts by weight of acid anhydride compound, and react at 180°C for 3 hours;
[0047] Step 3: Add 15 parts by weight of polyethylene glycol, and react for 3 hours to obtain a high-grade coal tar pitch material for road paving.
[0048] In step 1, select medium and low temperature coal pitch with a softening point of 95°C;
[0049] In step 2, the plasticizer is selected from epoxy soybean oil, tall oil, aromatic oil, animal oleic acid, and vegetable oleic acid;
[0050] In step 2, the acid anhydride compound is selected from the adduct of trimellitic anhydride and bisphenol A (the curing agent is prepared by mixing bisphenol A and trimellitic anhydride at a molar ratio of 1:2 at 180°C for 15 minutes T...
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