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Hydrophobically-modified polyethyleneimine foaming agent capable of releasing carbon dioxide, and application thereof

A polyethyleneimine and carbon dioxide technology, applied in the preparation of polyurethane foam materials, hydrophobically modified polyethyleneimine foaming agents and their preparation fields, can solve problems such as limitations

Active Publication Date: 2014-08-06
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, pentane will be subject to increasingly strict restrictions as a foaming agent.

Method used

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  • Hydrophobically-modified polyethyleneimine foaming agent capable of releasing carbon dioxide, and application thereof
  • Hydrophobically-modified polyethyleneimine foaming agent capable of releasing carbon dioxide, and application thereof
  • Hydrophobically-modified polyethyleneimine foaming agent capable of releasing carbon dioxide, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-16

[0072] This group is polyethylene with glycidyl ether compounds, that is, glycidyl ether compounds hydrophobically modified by the reaction of glycidyl ether groups (ie, epoxy groups) on it with amine groups in polyethyleneimine. Examples of imines.

[0073] Table 1

[0074]

[0075] The above-mentioned glycidyl ether compound hydrophobically modified polyethyleneimine is prepared by the following method: polyethyleneimine (PEI) is added in the reactor, and ethanol is added in the reactor, and the polyethyleneimine is mixed under stirring conditions. Dissolve the amine completely, then add glycidyl ether hydrophobic compound to the dissolved polyethyleneimine, stir and react at 25-80°C for 0.5-3 days, then remove ethanol by rotary evaporation; first add 20 ~40 parts by volume of petroleum ether to dissolve unreacted glycidyl ether hydrophobic compounds in the product, and then add 1 / 3 of distilled water based on petroleum ether to separate out glycidyl ether compounds. Am...

Embodiment 17-27

[0078] This group is an example of hydrophobically modified polyethyleneimine produced by the reaction of alkylcarboxylic acid hydrophobic compound and amine group in polyethyleneimine.

[0079] The polyethyleneimine hydrophobically modified by the alkyl carboxylic acid compound is prepared by the following method: adding polyethylene imine (PEI), alkyl carboxylic acid compound and catalyst into the reactor, and adding Chloroform until the above substances are completely dissolved, then stir and react under reflux for 10 to 15 hours; extract the reactant with saturated saline for at least three times, take the chloroform layer and remove the chloroform by rotary evaporation and then dry to constant weight. The recipes of the raw materials used are shown in Table 2. It can be seen from Table 2 that 5.2-34.5 mol% of N atoms in PEI chains are grafted with hydrophobic chains.

[0080] Table 2

[0081]

Embodiment 28-37

[0083] This group is an example of polyethyleneimine hydrophobically modified by the halogenated alkane compound reacted with the amine group in polyethyleneimine.

[0084] table 3

[0085]

[0086] The above-mentioned halogenated alkane compound hydrophobically modified polyethyleneimine is prepared by the following method: polyethyleneimine and halogenated alkane compound are added in chloroform, the two are completely dissolved, room temperature (to iodoalkane) or reflux temperature (for the rest of the halogenated alkanes) under stirring for a certain period of time (see Table 3); dissolve 4 parts by mass of NaOH in 1 / 2 volume of water based on chloroform, add the NaOH solution to the reaction mixture and wash for 30 minutes, remove the water layer Add water equal to the volume of chloroform and wash twice, each 30 minutes, remove the water layer; finally remove the chloroform by rotary evaporation and dry to constant weight. It can be seen from Table 3 that 5-40.4 mol...

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Abstract

The invention discloses a hydrophobically-modified polyethyleneimine foaming agent capable of releasing carbon dioxide. The hydrophobically-modified polyethyleneimine foaming agent is prepared by reacting polyethyleneimine subjected to hydrophobic modification by a glycidyl ether compound or an alkyl carboxylic compound or a halogenated alkane compound with 0-31% of distilled water at the pressure of 0.1-1 MPa in carbon dioxide at the room temperature for 1-3 days; a 5-40.4 mol% hydrophobic chain is grafted on N atoms in a polyethyleneimine molecular chain of the foaming agent, and a carbamic acid anion (-NCOO-) characteristic absorption peak or a bicarbonate (HCO3-) characteristic absorption peak exists at the range of 159-165 ppm of a C Nuclear magnetic resonance of the foaming agent, and the foaming agent can release carbon dioxide CO2 at the temperature of 50-150 to prepare a polyurethane foam material. The foaming agent provided by the invention can be uniformly dispersed in a preparation raw material of hydrophobic polyurethane foam, can solve a series of problems caused by the fact that non-modified polyethyleneimine is used as a foaming agent, and is climate-friendly.

Description

technical field [0001] The invention belongs to the technical field of foaming agent and its preparation and application, and in particular relates to a hydrophobically modified polyethyleneimine foaming agent capable of releasing carbon dioxide, a preparation method thereof and the application of the foaming agent in preparing polyurethane foam materials. Background technique [0002] Polyurethane foam is an important synthetic material, which not only has the characteristics of porosity, low relative density, high specific strength, etc., but also has large output and wide application. Polyurethane foam accounts for 5% of the world's plastic usage, and 50% of building insulation materials in developed countries use polyurethane foam (Yang Chunbai. Polyurethane, 2009; (3): 68-71). my country's polyurethane production in 2007 was 3 million tons, of which polyurethane foam accounted for more than 70%, and is widely used in sofas, mattresses, refrigerator insulation, car seat ...

Claims

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Application Information

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IPC IPC(8): C08G73/04C08J9/08
Inventor 谢兴益顾永江郑琳飞龙远铸
Owner SICHUAN UNIV
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