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Method for reaction extusion preparing hexyllactone type polyurethane based on in-site synthetic

An in-situ synthesis and reactive extrusion technology is applied in the field of preparation of caprolactone-type polyurethane to achieve the effects of simplifying the preparation process, good mixing effect and improving production efficiency

Inactive Publication Date: 2009-05-13
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its synthesis is mainly carried out in ampoules, and it is divided into two steps, that is, the hydroxyl-terminated polycaprolactone macromer needs to be synthesized first, and then the polyurethane is polymerized. This is only an exploration of the synthesis of a new material

Method used

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  • Method for reaction extusion preparing hexyllactone type polyurethane based on in-site synthetic
  • Method for reaction extusion preparing hexyllactone type polyurethane based on in-site synthetic
  • Method for reaction extusion preparing hexyllactone type polyurethane based on in-site synthetic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 183 grams of Ti(OPEG) 4 (R in its molecule 1 =R 2 = R 3 =R 4 , x=5) and polyethylene glycol mixture A with a molecular weight of 400 (wherein Ti(OPEG) 4 The molar ratio with polyethylene glycol is 1:4), mixed with 5400 grams of ε-caprolactone monomer and 113 grams of 4,4'-diphenylmethane diisocyanate, injected into the reaction extruder through a metering pump, After twin-screw reaction extrusion, cooling, and pelletizing, polycaprolactone polyurethane (polycaprolactone segment molecular weight is 11400, and its caprolactone polymerization degree DPn is 50) is obtained. The parameters of the twin-screw extruder are set as follows:

[0027]

Embodiment 2

[0029] Get 183 grams of mixture A (same as the previous example), mix with 2700 grams of ε-caprolactone monomer and 113 grams of 4,4'-diphenylmethane diisocyanate, and extrude through twin-screw reaction to obtain polycaprolactone Polyurethane with short segment length (polycaprolactone segment molecular weight is 5700, its degree of polymerization DPn is 25). The parameter setting of twin-screw extruder is set with example 1.

[0030] Table 1 is the mechanical property test data of the above-mentioned embodiment example product.

[0031] Table 1 The tensile mechanical properties test data of the product (5mm / min)

[0032] Material Tensile strength (MPa) Elongation at break (%) Example 1 25.9 769.6 Example 2 23.5 638.1

[0033] Table 2 is the dissolving situation of the above-mentioned embodiment example product in different solvents.

[0034] Table 2 Solubility performance results

[0035] Material Chloroform Tetrahydrofuran t...

Embodiment 3

[0037] Get 183 mixture A (same as previous example), mix with 78.5 grams of toluene diisocyanate and 2700 grams of epsilon-caprolactone monomers, and extrude through twin-screw reaction to make polyurethane (polycaprolactone) with short polycaprolactone chain length. The molecular weight of the caprolactone segment is 5700, and its degree of polymerization DPn is 25).

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Abstract

This invention relates to a extruding preparation method of caprolactone type polyurethane base on synthetical reaction, includes follows steps: add epsilon - caprolactone monomer, polyether glycol, diisocyanate and hydroxy titanium compound to double screw extruder reactor, takes reaction and extruded out, through strip mouth module and water bath for cooling to form strip shape, cut by dicing cutter to granular polymer, obtain caprolactone type polyurethane.

Description

technical field [0001] The invention relates to a preparation method of caprolactone-type polyurethane, in particular to a method for preparing caprolactone-type polyurethane directly from caprolactone monomer by using a twin-screw reaction extruder. Background technique [0002] With the increasing research interest in biopolymer materials, a large number of novel polymer materials with biodegradability have emerged. A large number of biodegradable polymers have been used in biomedical applications. Among these polymers, polyurethane is undoubtedly an interesting class of polymers. [0003] Since polyurethanes with various physical and chemical properties can be obtained by changing the chemical structure of the hard and soft segments and the length of the segments, they are a unique class of polymer materials that can be rationally designed. Biodegradable polyurethane usually obtains degradability by introducing molecular segments susceptible to hydrolysis into polymers,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/48C08G18/72C08G18/30C08G18/22B29C47/40B29C48/40
CPCB29C2947/92704B29C2947/9259B29C2948/9259B29C2948/92704B29C48/40
Inventor 夏浙安陈建定徐睿军翁盛光
Owner EAST CHINA UNIV OF SCI & TECH