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2-amino ethyl sulfonic acid modified water epoxy resin and its preparation method and water epoxy emulsion prepared from said water epoxy resin

A technology of water-based epoxy resin and water-based epoxy emulsion, which is applied in the direction of organic chemistry, can solve the problems of large particle size and insufficient stability of the emulsion, and achieve excellent hardness and impact strength, excellent curing performance, and stable performance. Effect

Inactive Publication Date: 2008-08-20
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The particle size of the water-based epoxy resin produced by the direct external emulsification method is relatively large, usually in the micron range, because the large particle size makes the formed emulsion not stable enough

Method used

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  • 2-amino ethyl sulfonic acid modified water epoxy resin and its preparation method and water epoxy emulsion prepared from said water epoxy resin
  • 2-amino ethyl sulfonic acid modified water epoxy resin and its preparation method and water epoxy emulsion prepared from said water epoxy resin
  • 2-amino ethyl sulfonic acid modified water epoxy resin and its preparation method and water epoxy emulsion prepared from said water epoxy resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] (1) 100g E-44 epoxy resin, 3g 2-aminoethanesulfonic acid, 24g water and 2g surfactant OP-10 (octylphenol polyoxyethylene ether type surfactant) are mixed in the three-neck bottle, React for 9 hours at a temperature of 80° C., and the water-based epoxy resin with a solid content of 75% can be obtained after the reaction is completed.

[0059] (2) 100g of water-based epoxy resin with a solid content of 75% is neutralized to partial alkaline (PH=7~8) with 200g of sodium hydroxide aqueous solution (wherein sodium hydroxide 1g), and then high-shear It was emulsified by a dispersing emulsifier, stirred at a high speed for 5 minutes, and the rotating speed was 1000 rpm to obtain a stable water-based epoxy emulsion with a solid content of 25%. Take 10 g of this epoxy emulsion and cure it with 1 g of diethylenetriamine. The curing condition is normal temperature curing (temperature 25° C., curing time is 5 hours), the hardness of the cured product is 5H, and the impact strength ...

Embodiment 2

[0061] (1) 100g E-42 epoxy resin, 10g 2-aminoethanesulfonic acid, 33g water and 1g surfactant NP-5 (nonylphenol polyoxyethylene ether type surfactant), 2g surfactant OP- 10 (octylphenol polyoxyethylene ether type surfactant) was mixed and dropped into a three-necked bottle, and reacted for 10 hours when the temperature was 83° C., and the water-based epoxy resin with a solid content of 70% could be obtained after the reaction was completed.

[0062] (2) 100g of water-based epoxy resin with a solid content of 70% was neutralized to partial alkalinity (PH=7~8) with aqueous sodium hydroxide solution 133g (wherein sodium hydroxide 3.2g), and then It was emulsified by a shear dispersing emulsifier, stirred at a high speed for 7 minutes, and the rotating speed was 2000 rpm to obtain a stable water-based epoxy emulsion with a solid content of 30%. 10 g of this epoxy emulsion was taken and cured with 1.2 g of polyamide, the curing condition was 95° C. for 2 hours, the hardness of the ...

Embodiment 3

[0064] (1) 100g E-51 epoxy resin, 15g 2-aminoethanesulfonic acid, 14g water and 4g surfactant polyoxyethylene stearate (fatty acid polyoxyethylene ester type surfactant) are mixed and dropped into a three-necked bottle , reacted for 7 hours at a temperature of 85° C., and the water-based epoxy resin with a solid content of 80% can be obtained after the reaction is completed.

[0065] (2) 100g of water-based epoxy resin with a solid content of 80% is neutralized to partial alkalinity (PH=7~8) with potassium hydroxide aqueous solution 300g (wherein potassium hydroxide 6.7g), and then It was emulsified by a shear dispersing emulsifier, stirred at a high speed for 10 minutes, and the rotating speed was 1000 rpm to obtain a stable water-based epoxy emulsion with a solid content of 20%. 10 g of this epoxy emulsion was taken and cured with 0.8 g of triethylenetetramine, the curing condition was 80° C. for 2 hours, the hardness of the cured product was 7H, and the impact strength was ...

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Abstract

The present invention provides one kind of 2-taurine modified water-thinned epoxy resin and its preparation process. The 2-taurine modified water-thinned epoxy resin is prepared with epoxy resin 100 weight portions, 2-taurine 3-50 weight portions, water 10-50 weight portions and surfactant 0.3-5 weight portions, and through mixing and copolymerization at 80-85 deg.c. The present invention provides also water-thinned epoxy resin emulsion, which is prepared with the 2-taurine modified water-thinned epoxy resin and through neutralization with water solution of alkali to slight alkalinity and further emulsifying and is stable when the solid content is within 50 %. The water-thinned epoxy resin emulsion has fine grain, high stability, solidified product with high hardness and excellent impact strength and other technological features, and may find wide application in paint, adhesive, fine chemical assistant and other fields.

Description

technical field [0001] The invention relates to a water-based epoxy resin, in particular to a 2-aminoethanesulfonic acid modified water-based epoxy resin, a preparation method thereof and a water-based epoxy emulsion prepared from the water-based epoxy resin. Background technique [0002] Epoxy resin has excellent properties, such as high adhesion, high hardness, and good wear resistance, and has been widely used in industry. However, epoxy resin often needs to use solvents when it is applied, which will cause serious environmental problems. pollute. With the enhancement of people's awareness of environmental protection, water-based epoxy resin has been paid more and more attention by scientific researchers in this field. widely used. [0003] At present, there are two main methods for preparing water-based epoxy resin at home and abroad, namely direct external emulsification and chemical modification re-emulsification. The direct external emulsification method refers to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D303/30C08G59/00C08J3/03
Inventor 刘伟区石磊
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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