A kind of double cationic asphalt emulsifier and preparation method thereof
A kind of asphalt emulsifier, double cation technology, applied in the field of double cation type asphalt emulsifier and its preparation, can solve the problems of high temperature reaction, high cost, source limitation, etc., achieve good storage stability, enhance charge intensity, and reduce production cost low effect
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Embodiment 1
[0031] (1) Preparation of double cationic asphalt emulsifier:
[0032] 1) Add 326g of N-hydrogenated tallow-1,3-propylenediamine and 400g of isopropanol into the reactor, heat and stir to dissolve. Then 90.3 g of methyl acrylate was added dropwise, and stirred at 70° C. for 4 h to obtain a reaction intermediate.
[0033] The obtained reaction intermediate was separated and purified by recrystallization and then detected by FTIR. The results are as follows: 3275cm -1 N-H stretching vibration absorption peak, 2917cm -1 and 2854cm -1 The asymmetric stretching vibration and symmetric stretching vibration absorption peaks of methylene respectively, 1735cm -1 It is the ester group C=O stretching vibration absorption peak, 1569cm -1 It is the bending vibration absorption peak of N-H, 1470cm -1 It is the methylene scissor vibration absorption peak, 1376cm -1 It is the methyl symmetrical bending vibration absorption peak, 1207cm -1 C-N stretching vibration absorption peak, 1125c...
Embodiment 2
[0044] (1) Preparation of double cationic asphalt emulsifier:
[0045] 1) Add 326g of N-hydrogenated tallow-1,3-propylenediamine and 400g of isopropanol into the reactor, heat and stir to dissolve. Then 175.5 g of methyl acrylate was added dropwise, and stirred at 75° C. for 3 h to obtain a reaction intermediate.
[0046] 2) Dissolve 83.2g of sodium hydroxide in 160.0g of water to obtain an aqueous solution of sodium hydroxide, dissolve 196.6g of chloroacetic acid in 400.0g of water to obtain an aqueous solution of chloroacetic acid; add the aqueous solution of sodium hydroxide dropwise to an aqueous solution of chloroacetic acid to obtain an aqueous solution of sodium chloroacetate . The prepared sodium chloroacetate aqueous solution was added dropwise to the product synthesized in step 1) above, and stirred at 75° C. for 3 h. The dicationic asphalt emulsifier was obtained, which was reserved for the emulsified asphalt test.
[0047] The synthesized product was separated a...
Embodiment 3
[0056] (1) Preparation of double cationic asphalt emulsifier:
[0057] 1) Add 326g of N-hydrogenated tallow-1,3-propylenediamine and 400g of isopropanol into the reactor, heat and stir to dissolve. Then 261.6 g of methyl acrylate was added dropwise, and stirred at 70° C. for 4 h to obtain a reaction intermediate.
[0058] 2) Dissolve 83.2g of sodium hydroxide in 160.0g of water to obtain an aqueous solution of sodium hydroxide, dissolve 196.6g of chloroacetic acid in 400.0g of water to obtain an aqueous solution of chloroacetic acid; add the aqueous solution of sodium hydroxide dropwise to an aqueous solution of chloroacetic acid to obtain an aqueous solution of sodium chloroacetate . The prepared sodium chloroacetate aqueous solution was added dropwise to the product synthesized in step 1) above, and stirred at 60° C. for 7 h. The dicationic asphalt emulsifier was obtained, which was reserved for the emulsified asphalt test.
[0059] The synthesized product was separated a...
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