Phosphate ester dispersant, and preparation method and application thereof
A technology of phosphate monoester and valerolactone, applied in chemical instruments and methods, phosphorus organic compounds, coatings, etc., can solve the problems of viscosity reduction, coating cracking, high polarity, etc., to avoid cracking and low synthesis cost , a wide range of effects
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Embodiment 1
[0050] Synthesis of methallyl alcohol unsaturated polyether (HPEG300): After adding 280 parts of 2-methallyl alcohol to the reaction kettle at room temperature, add 1 part of sodium methoxide solid to the reaction kettle, feed nitrogen and react The air in the still is replaced, and vacuumized to obtain a reaction initiator with a catalyst under vacuum conditions. Start the heating, and when the materials in the reactor are heated to 95°C, start to slowly feed the mixture of ethylene oxide (EO) and propylene oxide (PO) into the reactor (mass ratio propylene oxide (PO): ethylene oxide Alkanes (EO) = 1:1), the feed rate is 890 parts to carry out the polymerization reaction, the reaction temperature is controlled to be about 100 ° C, and the pressure in the kettle is kept relatively stable. Until the mixture of propylene oxide (PO) and ethylene oxide (EO) is completely added into the reactor, the aging reaction is carried out at a constant temperature of 100° C. for 60 minutes. ...
Embodiment 2
[0052] Synthesis of 4-hydroxybutyl vinyl unsaturated polyether (VPEG800): After adding 280 parts of 4-hydroxybutyl vinyl ether into the reaction kettle at room temperature, add 1 part of sodium methoxide solid into the reaction kettle, and feed Nitrogen is replaced with the air in the reactor, and vacuumized to obtain a reaction starter with a catalyst under vacuum conditions. Start the heating, and when the materials in the reactor are heated to 95°C, start to slowly feed the mixture of ethylene oxide (EO) and propylene oxide (PO) into the reactor (mass ratio propylene oxide (PO): ethylene oxide Alkanes (EO) = 1: 3), the feed rate is 1650 parts to carry out the polymerization reaction, the reaction temperature is controlled to be about 100 ℃, and the pressure in the kettle is kept relatively stable. Until the mixture of propylene oxide (PO) and ethylene oxide (EO) is completely added into the reactor, the aging reaction is carried out at a constant temperature of 100° C. for ...
Embodiment 3
[0054] Under nitrogen protection, add 100g of HPEG300 and 38g of ε-caprolactone at room temperature to a three-necked flask equipped with a thermometer, top stirrer, and gas inlet, add 0.7g of stannous octoate to the mixture while stirring, and slowly heat up to 100 ℃, continue to stir and react for 8 hours to obtain polymer monohydric alcohol P1, which is a light yellow viscous liquid, and Mn=414g / mol is confirmed by NMR, and the average mole number of ε-caprolactone is 1. Subsequently, the colorless liquid was cooled to 60°C, and 27.8g of polyphosphoric acid was added while vigorously stirring, and the stirring was continued at 90°C for 6 hours to obtain a transparent slightly yellow liquid, which was phosphoric acid ester dispersant S1 (which was phosphoric acid monoester Rate = 76%, phosphodiester rate = 15%, free phosphoric acid rate = 9%).
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