Carbon dioxide-based polyol, its preparation method and application
A technology of carbon dioxide and dihydric alcohols, which is applied to the preparation of organic carbonates, chemical instruments and methods, and the preparation of organic compounds. It can solve the problems of no promotion value and low price, and achieve excellent bonding performance and alkali resistance. and excellent oxidation resistance
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[0058] The present invention also provides a method for preparing the above-mentioned carbon dioxide-based polyol, comprising the following steps:
[0059] A1) Mix the PET material, poly(carbonate-ether) glycol and the first catalyst, and stir and react at 180-220° C. for 2-10 hours;
[0060] B1) The temperature of the reacted product is lowered to 130-150° C., and vacuumized for 0.5-1 hour to obtain a carbon dioxide-based polyol.
[0061] In the preparation method of the carbon dioxide-based polyol provided by the present invention, the components and proportions of the raw materials used are the same as above, and will not be repeated here.
[0062] In some embodiments of the present invention, before the PET material is mixed with the poly(carbonate-ether) glycol and the first catalyst, further comprising: cutting, washing and drying the PET material. In some embodiments, the cut size is (4-6) mm×(4-6) mm. In some embodiments, the cut size is 5mm×5mm. In the present inve...
Embodiment 1
[0113] Preparation of carbon dioxide-based polyols:
[0114] Cut discarded PET beverage bottle flakes into small pieces of 5mm×5mm, wash and dry them for later use. Take by weighing the PET flakes of 150g, pack in the there-necked flask, take by weighing 380g poly(carbonate-ether) glycol (number-average molecular weight is 2000, and carbonate unit content is 30wt%), and take by weighing 0.28g zinc acetate pour into a three-necked flask, and the three-necked flask was placed in an oil bath. Start the heating device and stir, heat up to 180°C, react for 10 hours, lower the temperature to 130°C, start the vacuum pump, vacuumize for 1 hour, and discharge to obtain the product carbon dioxide-based polyol. It can be seen from the test that the carbon dioxide-based polyol has the structure described in formula (I), wherein m=3; the hydroxyl value is 20 mg KOH / g, the acid value is 1 mg KOH / g, and the viscosity is 800 cps (@30°C). figure 1 It is the hydrogen nuclear magnetic resonanc...
Embodiment 2
[0118] Preparation of carbon dioxide-based polyols:
[0119] Cut discarded PET beverage bottle flakes into small pieces of 5mm×5mm, wash and dry them for later use. Take by weighing the PET flakes of 230g, pack in the there-necked flask, take by weighing 1200g poly(carbonate-ether) glycol (number-average molecular weight is 7000, and carbonate unit content is 70wt%), and take by weighing 0.96g manganese acetate pour into a three-necked flask, and the three-necked flask was placed in an oil bath. Start the heating device and stir, heat up to 220°C, react for 2 hours, lower the temperature to 150°C, start the vacuum pump, vacuumize for 1 hour, and discharge to obtain the product carbon dioxide-based polyol. It can be seen from the test that the carbon dioxide-based polyol has the structure described in formula (I), wherein m=60; the hydroxyl value is 60 mg KOH / g, the acid value is 5 mg KOH / g, and the viscosity is 3000 cps (@30°C).
[0120] H NMR (CDCl 3 deuterated reagent): 1...
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