Anacardol ether acid and preparation method thereof
A technology of cardanol ether and cardanol, which is applied in the chemical field, can solve the problems of insufficient strength and high cost of alkyd resin, achieve the advantages of performance and environmental friendliness, reduce the cost of raw materials, and enhance the effect of application range
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Embodiment 1
[0025] Cardanol and chloroacetic acid are first used as raw materials to synthesize cardanol ether ethyl acid, and its specific synthesis is as follows: cardanol 195g (0.65mol) is added in a four-necked flask, solvent 95% ethanol is added, and sodium hydroxide (48g , 1.2mol) of 50% aqueous solution was slowly dropped into the system, the reaction was stirred at room temperature for 30min, then heated to reflux for 30min, then chloroacetic acid (122g, 1.3mol) was added dropwise to the system, and the reaction was continued to be heated to reflux for 60min , and then vacuum evaporated the excess ethanol in the system, then added hydrochloric acid (1M) to adjust the pH>2, added 300mL ethyl acetate to separate layers, washed the organic phase with distilled water three times, then dried with anhydrous sodium sulfate, filtered, filtered The cake was rinsed twice with ethyl acetate (60 mL), the obtained organic phases were combined and the solvent was evaporated to obtain a pale yell...
Embodiment 2
[0031] Add 222.987g of the compound fatty acid obtained in Experiment 1, 93g of glycerin into a four-necked flask, heat 45g of xylene to 150°C for esterification, and use a water separator to separate the water produced during the esterification process. When the theoretical water output is reached, cool down to 120°C. ℃, add phthalic anhydride (148g) in batches and reflux at 150-180℃ for 5 hours, after separating out the theoretical amount of water, continue heating, distill out xylene, monitor the viscosity and acid value, when the viscosity (xylene dilutes 50% ) at about 7200mPa.S, pH = 5 ~ 15, turn off the heating, when the temperature drops to 120 ° C, dilute with xylene to about 50%, and discharge to obtain alkyd resin.
[0032] The indicators of the 50% oily alkyd resin plus rare earth naphthenate and cobalt naphthenate catalyst are as follows:
[0033] Viscosity: 7200mPa.S, solid content: 58%, acid value: 8mgKOH / g
[0034] Surface dry: 22min, completely dry: 24h
[0...
Embodiment 3
[0037] First, cardanol and 3-chloropropionic acid were used as raw materials to synthesize cardanol ether ethyl acid. The specific synthesis was as follows: 195 g (0.65 mol) of cardanol was added to a four-necked flask, and 95% ethanol was added as a solvent, and then the hydrogen oxidized A 50% aqueous solution of sodium (48g, 1.2mol) was slowly dripped into the system, the reaction was stirred at room temperature for 30min, then heated to reflux for 30min, then 141.5g3-chloropropionic acid (1.3mol) was added dropwise to the system, the The reaction was continued to heat and reflux for 60 minutes, then the excess ethanol in the system was evaporated in vacuum, then hydrochloric acid (1M) was added to adjust the pH>2, 300mL ethyl acetate was added to separate layers, the organic phase was washed three times with distilled water, and then washed with anhydrous sodium sulfate After drying and filtering, the filter cake was rinsed twice with ethyl acetate (60 mL), the obtained org...
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