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Continuous production method of modified poly (butylene succinate)

A technology of polybutylene succinate and a production method is applied in the field of continuous production of modified polybutylene succinate, and can solve the problems of many by-product small molecules, high production cost, low molecular weight and the like, Achieve the effect of reducing energy consumption, reducing raw material costs, and low raw material consumption

Active Publication Date: 2022-01-28
SHANGHAI NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem solved by the present invention is to provide a continuous production method of modified polybutylene succinate, which uses cyclic succinic anhydride and cyclic tetrahydrofuran as monomer raw materials, and adds fatty polyols to modify low-cost continuous production of high-molecular-weight MPBS, which overcomes the problems of many by-products of small molecules, low yield, low molecular weight, poor quality and high production costs in the existing PBS / MPBS synthesis technology

Method used

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  • Continuous production method of modified poly (butylene succinate)
  • Continuous production method of modified poly (butylene succinate)
  • Continuous production method of modified poly (butylene succinate)

Examples

Experimental program
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Effect test

Embodiment 1～8

[0048] Measured according to the molar ratio in Table 1, add succinic anhydride, tetrahydrofuran, modifier pentaerythritol, initiator 25w% hydroiodic acid, esterification catalyst trifluoromethanesulfonic acid and polymerization catalyst A titanium tetrachloride into the raw material preparation tank respectively , stir evenly and preheat to 50°C to prepare the slurry, and then input it into the raw material storage tank; continuously send the slurry from the raw material storage tank into the esterification reaction kettle, under the temperature of 160°C, Under 120min, carry out the ring-opening esterification reaction to obtain the esterification product; after removing the small molecules in the esterification product under 10kPa, the esterification product is continuously sent into the prepolymerization reactor, and mixed with the polymerization catalyst B butanediol titanium After homogenization, at a temperature of 200°C, a pressure of 10kPa and a material residence time ...

Embodiment 9～19

[0055] Succinic anhydride by material molar ratio: tetrahydrofuran: modifying agent: initiator water: esterification catalyst trifluoromethanesulfonic acid: polymerization catalyst A titanium tetrachloride: polymerization catalyst B butanediol titanium=1.000:1.000:0.100: 0.100:0.050:0.030:0.020 metering, add succinic anhydride, tetrahydrofuran, modifier, water, trifluoromethanesulfonic acid and titanium tetrachloride respectively into the raw material preparation tank, stir evenly and preheat to 60°C to prepare slurry The material is then input into the raw material storage tank; the slurry is continuously sent into the ring-opening esterification reactor from the raw material storage tank, and the ring-opening esterification reaction is carried out at a temperature of 180 ° C, a pressure of 1.0 MPa and a material residence time of 105 min. Esterification product: After removing the small molecules in the esterification product at 30kPa, the esterification product is continuous...

Embodiment 20

[0058] Except that the modifier is polyvinyl alcohol (PVA) with a polymerization degree of 100, and the molar ratio is succinic anhydride:PVA=1.000:0.002, the rest of the material ratio, operation steps and process conditions are the same as in Example 9. The single pass yield, cycle yield, weight average molecular weight, tensile strength and impact strength of the obtained polyester product are 95.9wt%, 98.9wt%, 256,000, 43MPa and 8.2kJ / m respectively 2 , see Table 3.

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Abstract

The invention provides a continuous production method of modified poly (butylene succinate), which is characterized in that succinic anhydride, tetrahydrofuran and a modifier are subjected to ring-opening esterification, pre-polycondensation and final polycondensation to prepare the modified poly (butylene succinate). The continuous production method specifically comprises the steps of A) mixing succinic anhydride, tetrahydrofuran, the modifier and an auxiliary agent, and preheating to obtain slurry; B) performing ring-opening esterification on the slurry to obtain an esterification product; C) removing small molecules from the esterification product, mixing with a polymerization catalyst B, and pre-polymerizing to obtain a pre-polymerized product; and D) carrying out polycondensation on the pre-polymerized product to obtain the modified poly (butylene succinate). According to the invention, the modified poly (butylene succinate) is produced by ring-opening polymerization of two cyclic monomers, the polymerization degree and yield of the product are high, the consumption of raw materials and energy is low, the production cost is low, and the polyester product can be completely biodegraded.

Description

technical field [0001] The invention relates to the technical field of polymer material synthesis, in particular to a continuous production method of modified polybutylene succinate. Background technique [0002] With the progress of human society and the improvement of living standards, people's awareness of environmental protection is getting stronger and stronger. It has become an inevitable trend to replace traditional plastics such as polyolefin PP and PE with biodegradable plastics. Agricultural film (mulch film, shed film, etc.), packaging film (disposable life film, disposable medical film, postal and express packaging film, etc.), household plastic (instant noodles and fast food boxes, disposable tableware, disposable medical infusion bags and syringes, etc.) and packaging foam plastics, the potential demand for biodegradable plastics is huge, and polybutylene succinate (PBS) and modified polybutylene succinate (MPBS), as completely biodegradable plastics One of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/42C08G63/85C08G63/86C08G63/84
CPCC08G63/42C08G63/85C08G63/866C08G63/863C08G63/84
Inventor 张春雷魏超王相茹罗亮潘小光李本锋
Owner SHANGHAI NORMAL UNIVERSITY