A kind of preparation method of cardanol polyether
A technology of cardanol polyether and cardanol, applied in the field of preparing cardanol polyether at low temperature, which can solve the problem of aggravating the color of cardanol
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[0016] In the preparation method of one embodiment of the present invention, by using an ionic liquid catalyst and an inorganic salt co-catalyst, cardanol polyoxyethylene ether can be synthesized at a relatively low temperature, which reduces the oxidation of cardanol, and makes the prepared cardanol polyoxyethylene ether with better color and luster. shallow.
[0017] In an embodiment of the present invention, the dosage of the ionic liquid catalyst is 0.01-5% of the mass of cardanol polyoxyethylene ether (the sum of the mass of cardanol and alkylene oxide), preferably 0.05-0.2%, for example, the dosage can be 0.03%, 0.08%, 0.1%, 0.15%, 0.3%, 0.4%, etc.
[0018] In an embodiment of the present invention, by using the ionic liquid main catalyst and the inorganic salt co-catalyst, the reactivity of the phenolic hydroxyl group of cardanol is improved, thereby reducing the reaction temperature of the ring-opening polymerization reaction, accelerating the reaction rate, and shorte...
Embodiment 1
[0029] Get 100g of cardanol and put it into the autoclave, add 0.2g of 1-ethyl-3-methylimidazole acetate and 0.002g of sodium iodide, carry out nitrogen replacement, after nitrogen replacement is completed, be heated to 70 ° C, add epoxy Ethoxylation of 5 g of ethane was carried out. After the pressure dropped and the temperature rose, 96.3 g of ethylene oxide was continuously added to the reaction kettle. The whole process lasted for 1.5 h. The temperature of the addition reaction was controlled at 70-80 °C, and the pressure The temperature is controlled below 0.4MPa, and after the reaction is completed, the temperature is lowered to 30-40°C, the product is taken out, and the hydroxyl value, color and cloud point of the product are analyzed.
[0030] Hydroxyl value: 80.14mg KOH / g; (GB / T7383-2007)
[0031] Molecular weight: 700
[0032] Shade: 2; (Gardner shade)
[0033] Cloud point: 76.5°C; (10% active in 25% diethylene glycol butyl ether).
Embodiment 2
[0041] Get 100g of cardanol and put it into the autoclave, add 0.2g of 1-butyl-3-methylimidazole acetate and 0.01g of sodium iodide, carry out nitrogen replacement, after the nitrogen replacement is completed, heat up to 70 ° C, add epoxy Ethoxylation of 5 g of ethane was carried out. After the pressure dropped and the temperature rose, 139.73 g of ethylene oxide was continuously added to the reaction kettle. The temperature of the addition reaction was controlled at 70 to 80 ° C for 1.8 hours during the whole process, and the pressure was controlled Below 0.4MPa, after the reaction is completed, the temperature is lowered to 30-40°C, the product is taken out, and the hydroxyl value, color and cloud point of the product are analyzed.
[0042] Hydroxyl value: 75.56mgKOH / g; (GB / T7383-2007)
[0043] Molecular weight: 742
[0044] Shade: 3; (Gardner shade)
[0045] Cloud point: 50°C; (1% aqueous solution).
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