One-step preparation of bio-based hyperbranched polyester plasticizer and its application in PVC cable materials
A hyperbranched polyester, bio-based technology, applied in the one-step preparation of bio-based hyperbranched polyester plasticizer and its application in PVC cable materials, the development and preparation of durable environmentally friendly bio-based plasticizers, can Solve the problems of small molecular weight, single performance, and poor compatibility of plasticizers, and achieve stable product quality, less waste, and good durability
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[0025] The preparation method of the diglycidyl succinate is as follows: add 1 mol of succinic acid, 5-10 mol of epichlorohydrin and 0.01-0.05 mol of catalyst into a three-necked flask equipped with a reflux condenser, magnetic stirring and a thermometer. The reaction temperature was raised to 90-120°C for 1-5h. After the reactant is cooled, 2 mol of sodium hydroxide is added, the mixture is stirred at 50-100° C. for 1-5 h and then filtered. The filtrate is distilled under reduced pressure to recover excess epichlorohydrin to obtain diglycidyl succinate. The catalyst can be selected from benzyltriethylammonium chloride or triphenylphosphine.
[0026] The molar ratio of diglycidyl succinate to trimethylolpropane is: 1.3:1-1.8:1.
[0027] The catalyst is any one of tetrabutylammonium chloride, benzyltriethylammonium chloride or tetrabutylammonium hydrogensulfate.
[0028] The pressure of the vacuum distillation device is 0.01-0.05MPa.
[0029] The acid anhydride includes any ...
Embodiment 1
[0032] Add 1 mol of succinic acid, 10 mol of epichlorohydrin and 0.01 mol of benzyltriethylammonium chloride catalyst into a three-necked flask equipped with a reflux condenser, magnetic stirring and thermometer, stir evenly and raise the temperature to 100°C for 4 hours, then stop heating After the reactant is cooled, continue to add 2mol sodium hydroxide particles, heat the mixture to 80°C, react for 2 hours, cool and filter, and the filtrate is distilled under reduced pressure to recover excess epichlorohydrin to obtain diglycidyl succinate.
Embodiment 2
[0034] Add diglycidyl succinate and trimethylolpropane with a molar ratio of 1:1.3 into a four-neck flask, stir evenly, then heat up to 100°C, add tetrabutylamine chloride catalyst, the amount is 1% of epoxy 2mol%, after continuing the reaction for 2 hours, switch to a vacuum distillation device, the pressure of the vacuum distillation device is 0.01MPa, continue the reaction at 80°C for 2h, cool down to 60°C and add acetic anhydride, and keep the reaction at 120°C under a nitrogen atmosphere for 3h. The reaction product is washed with 5% sodium bicarbonate solution and deionized water to neutrality, and then dehydrated by distillation under reduced pressure at 80° C. to obtain a bio-based hyperbranched polyester plasticizer product.
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