Waterborne epoxy emulsion,

A water-based epoxy emulsion, epoxy resin technology, applied in epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve the problems of short construction time, poor wettability, adhesion and salt spray resistance, etc. Good adhesion and film-forming compactness

Active Publication Date: 2018-11-30
BEIJING JINHWEILI APPLIED CHEM PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention proposes a water-based epoxy emulsion, which aims to solve the problems of the existing self-emulsifying epoxy emulsion with short construction time, poor wettability, adhesion and salt spray resistance

Method used

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  • Waterborne epoxy emulsion,

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preparation example Construction

[0018] The present invention also provides a kind of preparation method of aqueous epoxy emulsion, and this preparation method comprises the following steps:

[0019] (1) Take part of the epoxy resin from the formula and put it into the reaction vessel, then add the polyether and the catalyst in the formula to the reaction vessel in sequence, stir evenly, heat to 30-150°C and keep it warm for 1-7 hours. Preferably, the heating temperature in step (1) is 40-120° C., and the holding time is 2-5 hours. During specific implementation, the epoxy resin in the formula can be divided into two parts and added to the reaction container respectively, and the parts by weight of each part can be determined according to the actual situation. For example, 6-45 parts of epoxy resin can be put into the into the reaction vessel to react with other raw materials. The hydrophilic group is provided through the step (1), so that the epoxy resin is water-based, and meanwhile the flexibility of the ...

Embodiment 1

[0025] (1) Accurately weigh 6 grams of E51 epoxy resin in the formula and add it to the three-necked bottle, then add 5 grams of polyethylene glycol ether and 0.01 gram of triphenylphosphine to the three-necked bottle successively, stir evenly and heat to 30 ° C for 7 Hour;

[0026] (2) Continue to add the remaining 44 grams of E51 epoxy resin in the formula, stir evenly, at 30 ° C, add 0.1 gram of phosphoric acid, stir again, and keep warm for 6 hours;

[0027] (3) Cool down to 25° C., add 20 grams of water for emulsification to obtain a water-based epoxy emulsion.

Embodiment 2

[0029] (1) Accurately weigh the mixture of 45 grams of E51 epoxy resin and bisphenol F epoxy resin (NPEF170) in the formula and add it to the three-necked bottle, then add 20 grams of polyethylene glycol ether ether and 5 grams of polyglycol ether to the three-necked bottle successively Stannous octoate, stirred evenly and then heated to 120°C for 5 hours;

[0030] (2) Continue to add the mixture of remaining 20 grams of E51 epoxy resin and bisphenol F type epoxy resin (NPEF170) in the formula, stir evenly, at 120 ℃, add 10 grams of phosphoric acid, stir again, and keep warm for 5 hours;

[0031] (3) Cool down to 80°C, add 25 grams of water to emulsify to obtain a water-based epoxy emulsion

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Abstract

The invention provides a waterborne epoxy emulsion. The waterborne epoxy emulsion comprises, by weight, 50 to 130 parts of epoxy resin, 0.05 to 15 parts of phosphoric acid, 1 to 25 parts of polyether,and 0.005 to 7 parts of a catalyst. The waterborne epoxy emulsion is high in film forming compactness; epoxy groups with relatively high activity are maintained, and room temperature solidification is realized under cooperation effect with a curing agent; introduction of phosphoric acid is capable of increasing the clunging force between the waterborne epoxy emulsion and a base material, and improving the salt spray resistance of the waterborne epoxy emulsion.

Description

technical field [0001] The invention relates to the technical field of anticorrosion materials, in particular to a water-based epoxy emulsion. Background technique [0002] With the development of technology, more and more resins are water-based. Epoxy resin has good acid resistance, alkali resistance, salt spray resistance and other properties, and is widely used. Self-emulsifying epoxy emulsion is easy to use and has good comprehensive performance, which has attracted people's attention. [0003] Epoxy emulsions contain active epoxy groups, and can be cured at room temperature with amine curing agents, but the construction time is relatively short, and most of them only have a pot life of less than 4 hours. In addition, compared with solvent-based epoxy resins, water-based epoxy emulsions have poor wettability to substrates, poor adhesion, and poor salt spray resistance. Contents of the invention [0004] In view of this, the present invention proposes a water-based e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/08C09D7/65C08G59/14
CPCC08G59/1422C08L2205/025C08L2205/03C09D5/08C09D163/00C08L71/02C08L63/00
Inventor 程建军秦文
Owner BEIJING JINHWEILI APPLIED CHEM PROD
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