An organism-based polyol prepared by epoxy rapeseed oil
A bio-based polyol and epoxidized rapeseed oil technology, which is applied in the preparation of ester groups and hydroxyl groups, organic chemistry, etc., can solve problems that have not yet been discovered, and achieve the effects of strong functionality, reduced dependence, and high adjustability
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Embodiment 1
[0042] Add 1000g of epoxy rapeseed oil into a 2L glass kettle, then add 420g of diethylene glycol and 4.9g of potassium hydroxide, stir and raise the temperature, control the reaction temperature at 65-200°C, and the reaction time is 1-12 hours. Then add 211g of glycerol and 4g of potassium glycerol at a temperature of 65-100°C, control the temperature at 70-240°C, carry out alcoholysis reaction for 3-6 hours, and then keep it for 3-7 hours under a vacuum of 100-750kPa. Hour, back sampling analysis, the crude product of hydroxyl value 476mgKOH / g. Afterwards, it is refined, and the specific method is as follows: add 18g of 50% phosphoric acid for neutralization for 15 minutes, add 3g of magnesium silicate for adsorption, and then dehydrate for 60 minutes at a vacuum degree of 100-750KPa and a temperature of 80-120°C. , to obtain product 1540g refined bio-based polyol.
Embodiment 2
[0044] Add 1000g of epoxy rapeseed oil into a 2L glass kettle, then add 332g of propylene glycol and 5g of potassium hydroxide, stir and raise the temperature, control the reaction temperature at 65-200°C, and the reaction time is 1-12 hours. Then at a temperature of 65-100°C, add 308g of trimethylolpropane, 1.1g of potassium hydroxide, control the temperature at 70-240°C, carry out the alcoholysis reaction for 3-6 hours, and then keep it under the condition of a vacuum of 100-750kPa After 3 to 7 hours, after sampling and analysis, the crude product with a hydroxyl value of 470mgKOH / g. Afterwards, it is refined, and the specific method is as follows: add 20g of 50% phosphoric acid for neutralization for 15 minutes, add 3.2g of magnesium silicate for adsorption, and then dehydrate for 60 minutes at a vacuum degree of 100-750KPa and a temperature of 80-120°C, and filter Finally, the refined bio-based polyol of product 1550g was obtained.
Embodiment 3
[0046] Add 1000g of epoxy rapeseed oil into a 2L glass kettle, add 180g of ethanol, 38g of 10% potassium ethoxide, stir and heat up, control the reaction temperature at 65-200°C, and the reaction time is 1-12 hours. Then at a temperature of 65-100°C, add 440g of triisopropanolamine, 14g of 10% potassium ethoxide, control the temperature at 70-240°C, and carry out the alcoholysis reaction for 3-6 hours. Finally, the vacuum degree is 100 ~ 750kPaKeep it for 3-7 hours under the condition of lowering the temperature to 70-80°C for refining, and the specific method is as follows: add 17g of 50% phosphoric acid for neutralization for 20 minutes, add 15g of activated clay for adsorption, and then mix the product with a vacuum degree of 100-750KPa At a temperature of 80-120° C., dehydration for 60 minutes, and after filtration, 1570 g of refined bio-based polyols were obtained, with a hydroxyl value of 330 mgKOH / g.
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