Poly(butylene succinate) and preparation method thereof
A technology of polybutylene succinate and butanediol, which is applied in the field of aliphatic copolyesters, can solve the problems of difficult reaction control and degradation of material performance, so as to prolong the maintenance/replacement cycle and reduce the degree of crystallization , the effect of high heat resistance
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[0047] Example 1
[0048] Add 23.0g of 1,4-butanediol, 5.0g of 1,4-cyclohexanedimethanol, and 25.0g of succinic acid, under nitrogen protection, raise the temperature to 210°C, add 30mg of titanium glycol to maintain the temperature in the reactor At 210°C, the water produced by the reaction is removed by splitting, and the degree of reaction is judged by weighing the water produced by the reaction. When the esterification rate reaches 95%, after the temperature reaches 230°C, 3.6mg of phosphorous acid is added and reacted for 30 minutes , And then began to slowly raise the temperature to 245°C, gradually increase the degree of vacuum, keep the temperature constant, and maintain the pressure in the kettle below 80 Pa, and react for 3.5 hours. Purge the reactor with nitrogen to normal pressure, add 0.05 g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide compound, and stir for 5 minutes to obtain the product.
[0049] Relevant indicators of the product were obtained: viscosity 1.33d...
Example Embodiment
[0050] Example 2
[0051] Add 38.0g of 1,4-butanediol, 5.0g of 2,2,4,4-tetramethyl-1,3-cyclobutanediol, and 25.0g of succinic acid under the protection of nitrogen. Titanium ethylene glycol 30mg, maintain the temperature in the reactor at 200℃, and at the same time remove the water produced by the reaction by splitting, and judge the degree of reaction by weighing the water produced by the reaction. When the esterification rate reaches 95%, set the temperature to 230℃ Afterwards, add 3.6 mg of phosphorous acid and react for 30 minutes, then slowly increase the temperature to 245°C, gradually increase the vacuum degree, keep the temperature constant, and maintain the pressure in the kettle below 80 Pa, and react for 3.5 hours. Purge the reactor with nitrogen to normal pressure, add 0.05 g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide, and stir for 5 minutes to obtain the product.
[0052] Relevant indicators of the product were obtained: viscosity 1.33dL / g, terminal carboxyl gro...
Example Embodiment
[0053] Example 3
[0054] Add 33.0g of 1,4-butanediol, 5.0g of 2,2,4,4-tetramethyl-1,3-cyclobutanediol, and 25.0g of succinic acid, under the protection of nitrogen, to 190℃, and add Titanium ethylene glycol 30mg, maintain the temperature in the reactor at 190℃, and at the same time remove the water produced by the reaction by splitting, and judge the degree of reaction by weighing the water produced by the reaction. When the esterification rate reaches 95%, set the temperature to 230℃ Afterwards, add 5.0 mg of phosphorous acid and react for 30 minutes, then slowly increase the temperature to 245°C, gradually increase the vacuum degree, keep the temperature constant, and maintain the pressure in the kettle below 80 Pa, and react for 3.5 hours. Purge the reactor with nitrogen to normal pressure, add 0.08 g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide, and stir for 5 minutes to obtain the product.
[0055] Relevant indicators of the product were obtained: viscosity 1.33dL / g, ter...
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