Synthesis method of ricinoleic acid based polyester polyol
A technology of ricinoleic acid and synthesis method, applied in the field of polyurethane industry, can solve problems such as limiting large-scale application, small molecular weight, etc., and achieve the effects of excellent adhesion, simple operation, and convenient processing
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Embodiment 1
[0013] The synthetic method of ricinoleic acid-based polyester polyol of the present invention comprises the following steps:
[0014] The first step, the preparation of castor oil methyl ester
[0015] In a 500mL three-necked flask equipped with an electric stirrer, a reflux condenser and a thermometer, add 250g of pre-dehydrated castor oil, heat it to 35 degrees in a constant temperature water bath, and then add 54g of 5% KOH-CH 3 0H solution, after stirring for 2 hours, add 10% HCl to neutralize to pH 4-4.5, pour the reaction solution into a separatory funnel, let it stand for layers, separate the lower layer of glycerin-methanol solution, and use 100mL deionized solution for the upper layer Water was washed 3 times to neutrality, and dehydration was distilled off under reduced pressure to obtain 247g of clear and transparent castor oil methyl ester;
[0016] The second step, the synthesis of ricinoleic acid-based polyester polyol diol
[0017] Add the castor oil methyl e...
Embodiment 2
[0019] The synthetic method of ricinoleic acid-based polyester polyol of the present invention comprises the following steps:
[0020] The first step, the preparation of castor oil methyl ester
[0021] In a 500mL three-necked flask equipped with an electric stirrer, a reflux condenser and a thermometer, add 250g of pre-dehydrated castor oil, heat it to 35 degrees in a constant temperature water bath, and then add 54g of 5% KOH-CH 3 0H solution, after stirring for 2 hours, add 10% HCl to neutralize to pH 4-4.5, pour the reaction solution into a separatory funnel, let it stand for layers, separate the lower layer of glycerin-methanol solution, and use 100mL deionized solution for the upper layer Water was washed 3 times to neutrality, and dehydration was distilled off under reduced pressure to obtain 247g of clear and transparent castor oil methyl ester;
[0022] The second step, the synthesis of ricinoleic acid-based polyester polyol diol
[0023] Add the castor oil methyl e...
Embodiment 3
[0026] The synthetic method of ricinoleic acid-based polyester polyol of the present invention comprises the following steps:
[0027] The first step, the preparation of castor oil methyl ester
[0028] In a 500mL three-necked flask equipped with an electric stirrer, a reflux condenser and a thermometer, add 250g of pre-dehydrated castor oil, heat it to 35 degrees in a constant temperature water bath, and then add 54g of 5% KOH-CH 3 0H solution, after stirring for 2 hours, add 10% HCl to neutralize to pH 4-4.5, pour the reaction solution into a separatory funnel, let it stand for layers, separate the lower layer of glycerin-methanol solution, and use 100mL deionized solution for the upper layer Water was washed 3 times to neutrality, and dehydration was distilled off under reduced pressure to obtain 247g of clear and transparent castor oil methyl ester;
[0029] The second step, the synthesis of ricinoleic acid-based polyester polyol diol
[0030] Add castor oil methyl ester...
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