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Non-isocyanate polyurethane monomer and preparation method thereof

A polyurethane monomer, non-isocyanate technology, used in the preparation of carboxylic acid amides, the preparation of carbamate derivatives, chemical instruments and methods, etc., can solve the problems of high price, harsh preparation conditions, hinder the development of NIPU, etc. Corrosive, simple synthesis method, simple and cheap raw materials

Inactive Publication Date: 2019-02-22
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the preparation conditions of NIPU, especially its monomers, are now harsh and expensive, which seriously hinders the further development of NIPU. The present invention proposes a simple and cheap production material and a simple preparation process, and the molecular structure makes up for the weak bond structure in conventional polyurethane molecules. , with double bond groups, it is easy to form polymers and copolymers, and it also has super corrosion resistance, chemical resistance, hydrolysis resistance and permeability resistance

Method used

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  • Non-isocyanate polyurethane monomer and preparation method thereof
  • Non-isocyanate polyurethane monomer and preparation method thereof
  • Non-isocyanate polyurethane monomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052]Prepare described non-isocyanate polyurethane monomer, the first method specifically comprises the following steps:

[0053] S11. Uniformly dissolve propylene carbonate and ethylenediamine in a molar ratio of 1:1 into 50ml of solvent acetonitrile respectively to obtain propylene carbonate solution and ethylenediamine solution. The dripping speed is 1ml / min, drop into the ethylenediamine solution and react for 10 hours to obtain a mixed solution. If the propylene carbonate in the mixed solution is completely reacted by using online infrared or NMR, then use a rotary evaporator to remove the Solvent acetonitrile and remaining ethylenediamine are removed to obtain the first reaction intermediate, and the specific reaction equation is as follows:

[0054]

[0055] S12. Take 0.01 mol of acrylic acid and 0.01 mol of the first reaction intermediate obtained in step S1 and drop them into 50 ml of solvent acetonitrile at the same time at 1 ml / min, react at room temperature for...

Embodiment 2

[0064] Prepare described non-isocyanate polyurethane monomer, the first method specifically comprises the following steps:

[0065] S1. Dissolve propylene carbonate and ethylenediamine in a molar ratio of 1:1.5 into 70ml of solvent acetonitrile respectively to obtain propylene carbonate solution and ethylenediamine solution. The dripping speed is 10ml / min, drip into the ethylenediamine solution and react for 15 hours to obtain a mixed solution. If the propylene carbonate in the mixed solution is completely reacted by using online infrared or nuclear magnetic field, then use a rotary evaporator to remove the Solvent acetonitrile and remaining ethylenediamine are removed to obtain the first reaction intermediate, and the specific reaction equation is as follows:

[0066]

[0067] S2. Take 0.02mol of acrylic acid and 0.02mol of the first reaction intermediate obtained in step S1 and drop them into 70ml of solvent acetonitrile at the same time at 6ml / min, react at room temperat...

Embodiment 3

[0076] Prepare described non-isocyanate polyurethane monomer, the first method specifically comprises the following steps:

[0077] S1. Dissolve propylene carbonate and ethylenediamine uniformly in 60ml of solvent acetonitrile respectively according to the molar ratio of 1:1.25 to obtain propylene carbonate solution and ethylenediamine solution. The dripping speed is 5ml / min and drips into the ethylenediamine solution and reacts for 12 hours to obtain a mixed solution. If the propylene carbonate in the mixed solution is completely reacted using online infrared or NMR, then use a rotary evaporator to remove the Solvent acetonitrile and remaining ethylenediamine are removed to obtain the first reaction intermediate, and the specific reaction equation is as follows:

[0078]

[0079] S2. Take 0.01mol of acrylic acid and 0.01mol of the first reaction intermediate obtained in step S1 and drop them into 60ml of solvent acetonitrile at the same time at 3ml / min, react at room tempe...

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Abstract

The invention discloses non-isocyanate polyurethane monomer and a preparation method thereof. The non-isocyanate polyurethane monomer is of a structure shown as follows, wherein R is selected from saturated alkane, unsaturated alkane or aromatic hydrocarbon, R1 is methyl or hydrogen group, R2 is alkyl, and R3 is hydrogen or alkyl. The non-isocyanate polyurethane monomer has double-bond groups, thereby being very easy to form polymer and copolymer, has non-isocyanate polyurethane special groups, has good corrosion resistance, chemical resistance, hydrolysis resistance and penetration resistanceand makes up weak-bond structure in conventional polyurethane molecules; the preparation process only includes two times of amidation reaction, so that the preparation method is simple in preparationprocess.

Description

technical field [0001] The invention relates to the field of chemical materials, in particular to a non-isocyanate polyurethane monomer and a preparation method thereof. Background technique [0002] Polyurethane is a urethane polymer. Due to its rich variety of raw materials and its ability to be made into products of various shapes, it is known as a "cuttable" polymer by chemical engineers. In recent years, with economic growth, people's demand for polyurethane products is increasing, and it has been recognized and developed globally. Its industrialized products have formed a market at a very high speed. It has formed a market scale in recent years, but there are still many One of the highlight products with great development potential. [0003] The development of non-isocyanate polyurethane (Nonisocyanate Polyurethane, NIPU) is an important direction of polyurethane research. Non-isocyanate polyurethane generally refers to a new type of environmentally friendly polyuret...

Claims

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Application Information

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IPC IPC(8): C07C269/04C07C269/06C07C271/20C07C231/02C07C233/38
CPCC07C231/02C07C233/38C07C269/04C07C269/06C07C271/20
Inventor 苏鑫冯玉军杨升彩姜禹汀
Owner SICHUAN UNIV
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