Epoxy resin water dispersion and process for preparing the same

A technology of epoxy resin and dispersion, applied in epoxy resin coatings, coatings, etc., can solve the problems of poor stability of resin dispersion, high resin viscosity, large particle size of dispersion, etc. The effect of long and small average particle size

Active Publication Date: 2011-03-09
GUANGZHOU SUPER CHEM COATING CO LTDGUANGZHOU SUPER CHEM COATING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these dispersions generally have large particle sizes, or high resin viscosity, and poor stability of resin dispersions.

Method used

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  • Epoxy resin water dispersion and process for preparing the same
  • Epoxy resin water dispersion and process for preparing the same
  • Epoxy resin water dispersion and process for preparing the same

Examples

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preparation example Construction

[0050] (4) Preparation of the dispersion: Then add the co-solvent of the formulated amount until the reaction temperature of the system drops to 60°C; After adding, keep it for 20 minutes, then remove the epoxy water dispersion and disperse it on the disperser at a speed of 3000r / min for about 30 minutes.

[0051] Specific implementation formula:

Embodiment 1

[0053] According to 100 parts by mass, first add 92.25 parts by mass of polyethylene glycol 4000 and 7 parts by mass of epoxy resin E-44 into a 250ml four-necked bottle, adjust the temperature to 90°C, and blow in nitrogen for protection for 20 minutes. When the temperature of the system rises to 90°C, slowly add 0.75 parts by mass of triphenylphosphine dropwise, then raise the temperature of the system to 120°C within 1 hour, and then keep the system reacting for 4 hours, the color of the reaction system gradually changes from white to Pale yellow, it is a reactive emulsifier, ready for use.

[0054] According to 100 parts by mass, add 3.7 parts by mass of epoxy resin Epon8283, 7.3 parts by mass of bisphenol A, and 0.09 parts by mass of catalyst triphenylphosphine into a 500ml four-necked bottle, raise the reaction temperature to 160°C, and react for 0.5h. Stop reaction when the epoxy equivalent value is 510; then add 0.45 mass parts of double-terminal carboxyl polyethylene g...

Embodiment 2

[0058] According to 100 parts by mass, 3.9 parts by mass of epoxy resin Epon828, 7.35 parts by mass of bisphenol A, and 0.09 parts by mass of catalyst triphenylphosphine were added to a 500ml four-necked bottle, and the reaction temperature was raised to 160°C for 0.5 hours. Epoxy equivalent value 510~530 stop reaction; Then add 0.90 mass parts of double-terminal carboxyl polyethylene glycol with molecular weight 1700, maintain reaction and carry out 20min, then add 12.5 mass parts of synthetic reactive epoxy emulsifier of Example 1 again, react again 20min; Add 13.57 parts by mass of co-solvent propylene glycol monobutyl ether until the reaction temperature of the system drops to 60°C; then increase the stirring speed to 3000r / min, add 31.69 parts by mass of deionized water dropwise at a speed of 5min / ml, and add 31.69 parts by mass of deionized water at a rate of 3000r / min The speed continues to disperse for about 30 minutes. The index of embodiment 2 gained epoxy aqueous di...

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Abstract

The inventive epoxy resin aqueous dispersion and preparation method thereof belong to the field of chemical industry coatings, the aqueous dispersion contains: 20-45wt.% of an epoxy resin, 2-15wt.% of bisphenol A or bisphenol F, 0.01-0.2wt.% of a catalyst, 0.1-2wt.% of double-ended carboxyl polyethylene glycol, 5-20wt.% of a reactive emulsifying agent, 3-20wt.% of a solubilizing assistant and 25-55wt.% of deionized water; the reactive emulsifying agent is synthesized at first and the epoxy resin and the bisphenol A or bisphenol F are then subjected to reactive chain extension under the actionof the catalyst triphenylphosphine, when certain epoxy equivalent value is reached, the double-ended carboxyl polyethylene glycol is subsequently added for the reaction followed by the addition of the synthesized reactive emulsifying agent for the further reaction, in the end, the water and the solubilizing assistant are added to prepare the epoxy resin aqueous dispersion via high-speed dispersion. The inventive epoxy resin aqueous dispersion is in a shape of white milk, has excellent storage stability and can be mixed directly with an aqueous curing agent without the need of the high-speed dispersion. The invention can be applied to manufacturing industrial anticorrosive coatings, floor coatings, interior / exterior wall coatings for construction, etc.

Description

technical field [0001] The epoxy resin aqueous dispersion and the preparation method thereof of the present invention belong to the field of chemical coatings, relate to a kind of high stability epoxy resin aqueous dispersion and its preparation method which can be used directly by diluting with water, this aqueous dispersion can be applied Used in the manufacture of industrial anti-corrosion coatings, floor coatings, interior and exterior wall coatings for construction, etc. Background of the invention [0002] Epoxy resin coatings have the characteristics of high adhesion, excellent chemical resistance, high hardness, good wear resistance, excellent solvent resistance, good alkali resistance and salt spray resistance, and have been widely used in industry. Traditional solvent-based epoxy resin coatings cause great harm to the environment and human body. With the increasing requirements for environmental protection, water-based epoxy resin coatings have become an inevitabl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L63/02C08G59/14C08J3/03C09D163/00C09D163/02
Inventor 刘娅莉张强国周子鹄刘刚孙再武
Owner GUANGZHOU SUPER CHEM COATING CO LTDGUANGZHOU SUPER CHEM COATING CO LTD
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