Plant-fiber-base polyether ester polylol, and preparation method and applications thereof
A plant fiber based polyether ester technology, applied in the field of polymer chemistry, can solve problems such as poor compatibility, easy shrinkage of polyurethane foam, and reduced reactivity, and achieve high temperature resistance, fine cells, and improved performance.
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[0028] Example 1
[0029] (1) Liquefaction of plant fiber raw materials: add 20 g of polyethylene glycol 400, 40 g of glycerin and 0.3 g of sulfuric acid into a three-necked flask equipped with a condenser, a mechanical stirrer and a water separator, stir to mix evenly, and start the oil bath Heat up to 50°C, add 30g of dried bagasse, heat up to 150°C, and react at this temperature for 1h, add 0.9g of solid NaOH to neutralize the acidic substances in the reaction mixture, and filter while hot to remove the filter residue. Cool to obtain liquefied products;
[0030] (2) Esterification of the liquefied product of plant fiber raw materials: Take 50g of the liquefied product in a three-necked flask, and when the temperature of the liquefied product stabilizes at 140°C, add 50g of ε-caprolactone and 0.005g of stannous octoate, at this temperature After reacting for 1 hour, stop heating and cool at room temperature to obtain plant fiber-based polyester polyol with a hydroxyl value of 49...
Example Embodiment
[0031] Example 2
[0032] (1) Liquefaction of plant fiber raw materials: Add 60g of polyethylene glycol 400, 60g of glycerin and 1g of sulfuric acid into a three-necked flask equipped with a condenser, a mechanical stirrer and a water separator, stir to mix evenly, and start the oil bath heating , Heat up to 60°C, add 30g of dried bagasse, heat up to 130°C, and react at this temperature for 1h, add 0.9g of solid NaOH to neutralize the acidic substances in the reaction mixture, and filter to remove the filter residue while it is hot, and cool , Get the liquefied product;
[0033] (2) Esterification of the liquefied product of plant fiber raw materials: Take 50g of the liquefied product in a three-necked flask, and when the temperature of the liquefied product stabilizes at 140°C, add 30g of γ-valerolactone and 0.15g of dibutyltin oxide, at this temperature After reacting for 1 hour, stop heating and cool at room temperature to obtain plant fiber-based polyester polyol with a hydrox...
Example Embodiment
[0034] Example 3
[0035] (1) Liquefaction of plant fiber raw materials: add 60g of polyethylene glycol 400 60g, glycerol 20g and sulfuric acid 3g into a three-necked flask equipped with condenser, mechanical stirrer and water separator, stir to make it evenly mixed, and start oil bath heating , Heat up to 60°C, add 30g of dried bagasse, heat up to 170°C, and react at this temperature for 1h, add 0.9g of solid NaOH to neutralize the acidic substances in the reaction mixture, and filter to remove the filter residue while it is hot, and cool , Get the liquefied product;
[0036] (2) Esterification of the liquefied product of plant fiber raw materials: Take 50g of the liquefied product in a three-necked flask, and when the temperature of the liquefied product stabilizes at 140°C, add 100g of γ-valerolactone and 0.1g of tetraphenyltin, at this temperature After reacting for 1 hour, stop heating and cool at room temperature to obtain plant fiber-based polyester polyol with a hydroxyl v...
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