Preparing method for high hydroxyl value plant oil polyhydric alcohol
A technology of vegetable oil polyol and vegetable oil, which is applied in the field of preparation of high hydroxyl value vegetable oil polyol, can solve the problems of poor foam dimensional stability, low functionality, and few active points, and achieve easy after-treatment, high hydroxyl value, Good dimensional stability
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Embodiment 1
[0035] soybean oil 500g
[0036] Epoxidized soybean oil 400g
[0037] Diethanolamine 120g
[0038] Triethanolamine 140g
[0039] Glycerin 100g
[0040] Pentaerythritol 15g
[0041] water 10g
[0042] KOH 8g
[0043] Feed the above components, in N 2 Under protection, the temperature was raised to 120° C. for 60 minutes. Close N 2, evacuated, heated to 160°C, and kept at 160°C for 6 hours. After cooling, about 1250g of the product is obtained. The hydroxyl value of the product is 500mgKOH / g, and the viscosity is 12000mPa·s.
Embodiment 2
[0045] Epoxidized soybean oil 800g
[0046] Diethanolamine 100g
[0047] Diethylene glycol 100g
[0048] Glycerin 30g
[0049] Ethylene glycol 10g
[0050] water 10g
[0051] KOH 10g
[0052] Feed the above components, in N 2 Under protection, the temperature was raised to 135° C. for 60 minutes. Close N 2 , evacuated, 5-100mmHg, heated to 160°C, and kept at 160°C for 3 hours. After cooling, about 1180g of the product is obtained. The hydroxyl value of the product is 430mgKOH / g, and the viscosity is 6000mPa·s.
Embodiment 3
[0054] Palm oil 500g
[0055] Epoxidized soybean oil 500g
[0056] Diethanolamine 100g
[0057] Diethylene glycol 250g
[0058] water 15g
[0059] Sodium hydroxide 6g
[0060] Feed the above components, blow nitrogen, raise the temperature to 110°C, and react for 90 minutes. Turn off nitrogen, heat up to 180°C, vacuumize, and keep warm at 180°C for 5 hours. After cooling, about 1250g of the product was obtained. The hydroxyl value of the product is 280mgKOH / g, and the viscosity is 5000mPa·s.
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