Novel high-corrosion-resistance waterborne epoxy curing agent and preparation method thereof

A water-based epoxy and curing agent technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problems of limiting the popularization and use of water-based coatings, insufficient salt spray performance, etc., to improve the corrosion resistance of salt spray, enhance Anti-corrosion effect, effect of reducing film defects

Pending Publication Date: 2017-08-25
HAOLISEN CHEM TECH (JIANGSU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, due to the structural factors of water-based coatings, the lack of salt spray performance has become the core factor restricting the promotion and use of water-based coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0018] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0019] A novel high-corrosion water-based epoxy curing agent, its molecular structure is as shown in formula I or formula II:

[0020] I,

[0021] II.

Embodiment 1

[0023] The specific formula for preparing modified epoxy resin is as follows:

[0024] Substance name Parts by mass (g) E-51 epoxy resin 200 PEG-1000 120 Propylene Glycol Methyl Ether 200 Boron trifluoride ether solution 0.03 8-Hydroxyquinoline 14.5

[0025] Add E-51 epoxy resin, PEG-1000 and propylene glycol methyl ether into a four-neck flask equipped with a thermometer, stirring paddle, and condenser, raise the temperature to 70~85°C, add boron trifluoride ether catalyst, and keep warm for 2 hours Finally, add 8-hydroxyquinoline, raise the temperature to 80~90°C and keep it warm for 2 hours, then cool down and discharge. Store in a dry airtight container for later use.

Embodiment 2

[0027] The specific formula is as follows:

[0028] Substance name Parts by mass (g) triethylenetetramine 16.2 p-xylylenediamine 8 Propylene Glycol Methyl Ether 40 Example 1 Resin 230 Propylene Glycol Methyl Ether 40 Benzyl glycidyl ether 26 lactic acid 12 Deionized water 140

[0029] In a four-neck flask equipped with a thermometer, a stirring paddle, and a condenser, add triethylenetetramine, p-xylylenediamine, and propylene glycol methyl ether, raise the temperature to 50~60°C, and drop the resin of Example 1 into the reaction flask , the dropwise addition was completed in about 2 hours. After the dropwise addition was completed, the temperature was raised to 80~90°C for 2 hours, and then the temperature was lowered to 60°C. Small molecular amines and low boiling solvents were removed by distillation under reduced pressure, and propylene glycol methyl ether was added, stirred for 30 minutes, and then added dropw...

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PUM

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Abstract

The invention provides a novel high-corrosion-resistance waterborne epoxy curing agent and a preparation method thereof. The molecular structure of the epoxy curing agent is as shown in the formula I or II: the formulas I and II are as shown in the specification. The novel high-corrosion-resistance waterborne epoxy curing agent has the following beneficial effects that an EO chain segment and a little of neutralized ion amine and hydroxyl in the curing agent structure provide corresponding hydrophilcity for emulsification of the curing agent, and rigid structures on aromatic diamine and epoxy resin provide high lipophilicity and corrosion resistance for the curing agent; 2, a quinoline structure in the curing agent structure achieves an amphiphilic balance effect under a phase action system, so that the salt fog corrosion resisting property of a paint film matched with epoxy resin is greatly improved; by the introduction of the aromatic diamine, an effective primary amine group can be provided for the curing agent through a steric effect, and an aromatic group is introduced, so that the corrosion resisting effect of the paint film is effectively enhanced; by introducing an epoxy resin structure into the curing agent structure, the curing agent has the water-oil content close to that of the epoxy resin, and the shortcomings of the paint film can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of water-based coatings, specifically a novel high-corrosion water-based epoxy curing agent emulsion. The epoxy curing agent emulsion is matched with a corresponding water-based epoxy resin and used in water-based coatings, and has extremely high anti-corrosion performance . Background technique [0002] Since the reform and opening up, with the development of domestic science and technology and modern industrialization, the domestic environment has encountered serious side effects of social development, especially since entering the new millennium, domestic environmental problems have become increasingly serious. This serious problem has also attracted more and more attention from the country. In the field of coatings, low VOC emissions and water-based solvent-based coatings have also become an irreversible trend. However, compared with solvent-based coatings, water-based coatings have many properties. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/64C08G65/333C08G65/331C09D163/00C09D5/08C09D7/12
CPCC09D7/61C09D163/00C08G59/64C08G65/3318C08G65/333C08G65/33306C08G65/33313C09D5/08C08K13/02C08K2003/2241C08K2003/2272C08K3/04C08K3/346
Inventor 柳昀刘薇薇周贤郑子童郭利郭辉陈豪杰
Owner HAOLISEN CHEM TECH (JIANGSU) CO LTD
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