Multistage reaction continuous polymerization unit for synthesizing polylactic acid material with lactides monomer

A technology for synthesizing polylactic acid and polymerization equipment, which is applied in the field of multi-stage continuous polymerization technology and equipment, can solve the problems of low conversion rate of lactide, low product molecular weight, difficult operation control, etc., and achieve high molecular weight, excellent physical and mechanical properties, The effect of reducing the load
CN101353417BInactive Publication Date: 2011-08-31四川琢新生物材料研究有限公司
0 Cites 4 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
四川琢新生物材料研究有限公司
Publication Date
2011-08-31
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a multi-grade continuous polyplant of polylactic acid materials, which is synthesized by the ring-opening polymerization of a lactide monomer. The multi-grade continuous polyplant consists of a polyplant device and a feed device with different characteristics, including a prepolymer reaction kettle set, a double-screw reaction squeezer, a fused mass feed pump, a static mixer and a tubular reactor. Compared with the plant for adopting a single double-screw reaction squeezer to synthesize the polylactic acid materials, the multi-grade continuous polyplant disperses and lightens the load of the reaction devices of each grade as a multi-grade plant is used for replacing a single-grade reaction plant, thus leading the control on the conversion rate of the lactide monomerto be easier and more stable; as the fused mass feed pump is connected in series in the middle, the floating speed of the materials and the pressure of the squeezer and a subsequence device can be stabilized, the reaction condition can be better controlled; as the back section of the plant is provided with the static mixer and the tubular reactor, the final conversion rate of the lactide monomer can be further improved, thus being beneficial to improving and adjusting the molecular weight and the molecular weight distribution of the polylactic acid materials.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The multi-stage continuous polymerization process and device described in the present invention are used for ring-opening polymerization of lactide monomers to synthesize biodegradable polylactic acid materials. The polymer polymerization method and equipment involve polymer chemistry and polymer physics. , using multi-level equipment segmented control, can achieve the effect of dispersing equipment load, facilitating operation, improving product conversion rate, adjusting molecular weight and stabilizing quality. Background technique

[0002] The synthesis of polylactic acid materials is usually to synthesize lactide from lactic acid, and then ring-opening polymerization of lactide to generate polylactic acid, that is, a two-step method, which can synthesize products with higher molecular weight. In the two-step method, lactide is opened There are many methods of ring polymerization. The simplest polymerization method is batch polymerization in ampoul...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More