Mixing type nonisocyanate polyurethane and preparation method thereof

A non-isocyanate, hybrid technology, applied in the field of non-isocyanate polyurethane, to achieve the effect of reducing dependence and reducing environmental pollution

Inactive Publication Date: 2008-09-10
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

epoxidized soybean oil with CO 2 The five-membered cyclic carbonate generated by cycloaddition is mixed with epoxy resin, and then reacted with amines to obtain mixed non-isocyanate polyurethane. No patent report has been found after searching.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 80g of epoxidized soybean oil, tetrabutylammonium bromide 1.96g (2mol%) in an autoclave with a volume of 100ml that is equipped with magnetic stirring, vent pipe and sampling tube, be warming up to 100 ° C, start to feed CO 2 gas, keep the pressure at 5 atm, and discharge after 40 hours of reaction. Pour the product into a small plastic cup, add 10% epoxy resin E-51, heat and mix well at 60-70°C, then add stoichiometric ethylenediamine (EDA), add catalyst tetrabutylammonium bromide (1mol %), stirred rapidly for 2-3min, poured on the mold, the sheet forming temperature was 100-110°C, and the sheet forming time was 7-8 hours. After vulcanizing in an oven at 90°C for 24 hours, it was placed at room temperature for 7 days to measure its physical properties. Mechanical behavior.

[0025] The physical properties of the test piece are as follows: hardness (ShoreA), 50; rebound, 6%; elongation, 133%; tensile strength, 1.5MPa; permanent change at break, 5%; tear strength, 5...

Embodiment 2

[0027] Add 80g of epoxidized soybean oil, 2.53g (3mol%) of tetrabutylammonium chloride in an autoclave with a volume of 100ml that is equipped with magnetic stirring, vent pipe and sampling tube, be warming up to 120 ° C, start to feed CO 2 gas, keep the pressure at 10 atm, and discharge after 30 hours of reaction. Pour the product into a small plastic cup, add 10% epoxy resin E-44, heat at 60-70°C and mix evenly, then add stoichiometric ethylenediamine (EDA), add catalyst tetrabutylammonium bromide (1.5 mol%), stirred rapidly for 2-3min, poured on the mold, the sheet forming temperature was 100-110°C, and the sheet forming time was 7-8 hours. After vulcanizing in a 90°C oven for 24 hours, it was placed at room temperature for 7 days to measure its physical and mechanical properties.

[0028] The physical properties of the test piece are as follows: hardness (Shore A), 55; rebound, 7%; elongation, 146%; tensile strength, 1.8MPa; permanent change at break, 5%; tear strength, 5...

Embodiment 3

[0030] Add the epoxy soybean oil of 80g in the autoclave that is furnished with the volume of 100ml of magnetic stirring, ventilation tube and sampling tube, KI1.60g (4mol%) is dissolved in N, N-dimethylformamide, is warming up to 140 ℃, start to feed CO 2 gas, keep the pressure at 15atm, and discharge after 20 hours of reaction. Pour the product into a small plastic cup, add 20% epoxy resin E-51, heat and mix well at 60-70°C, then add stoichiometric hexamethylenediamine (HA), add catalyst tetrabutylammonium bromide (2mol %), stirred rapidly for 2-3min, poured on the mold, the sheet forming temperature was 100-110°C, and the sheet forming time was 7-8 hours. After vulcanizing in an oven at 90°C for 24 hours, it was placed at room temperature for 7 days to measure its physical properties. Mechanical behavior.

[0031] The physical properties of the test piece are as follows: hardness (Shore A), 78; rebound, 7%; elongation, 105%; tensile strength, 3.5MPa; permanent change at b...

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PUM

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Abstract

The invention relates to hybrid non-isocyanate polyurethane which is prepared through adopting the following method: epoxidized soybean oil and weak base catalyst are added in a reaction kettle, and then carbon dioxide gas is pumped in; at the action of reaction temperature, reaction pressure and stirring, reaction is started, and cyclic carbonate is generated after the reaction; the cyclic carbonate is mixed with epoxy resin and organic base catalyst is added; then, the mixture is mixed with primary amine compound so as to be formed into sheets; finally, sulfuration is carried out under the condition of sulfuration with the product placed for 7 to 9 days at room temperature. The hybrid non-isocyanate polyurethane has the advantages that: the hybrid non-isocyanate polyurethane is synthesized through the mixing and the reaction of natural regenerable vegetable resource and epoxy resin, thereby reducing the dependence on petrochemical resource, making full use of the regenerable vegetable resource and carbon resource and reducing environmental pollution.

Description

technical field [0001] The invention belongs to a method for non-isocyanate polyurethane, and specifically relates to epoxidized soybean oil as a natural renewable resource and carbon dioxide cycloaddition to generate a five-membered cyclic carbonate, and then the five-membered cyclic carbonate and epoxy resin After mixing, it reacts with primary amine compounds to form a mixed non-isocyanate polyurethane. technical background [0002] Epoxy resin (EP) is an important class of thermosetting resin, which has the advantages of excellent mechanical properties, adhesive properties, electrical insulation properties, chemical stability, solvent resistance and low cost. It is widely used in adhesives, coatings, electronic and electrical insulation materials , construction, machinery, aerospace and other fields have been widely used. However, epoxy resin is a thermosetting material with a high degree of crosslinking. It has a three-dimensional network structure and has a large inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L63/00C08G71/04C08J5/18C08J3/24
Inventor 亢茂青李振荣赵雨花王军威王心葵
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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