Preparation of waterborne epoxy anticorrosive coating with excellent water resistance and salt-fog resistance
A technology of water-based epoxy and anti-corrosion coatings, which is applied in the field of coatings and can solve the problems of water-based epoxy anti-corrosion coatings that need to be improved and poor stability of water-based epoxy emulsions.
Active Publication Date: 2013-10-02
中昊北方涂料工业研究设计院有限公司
View PDF4 Cites 6 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] At present, there are still two problems that need to be solved urgently in water-based epoxy anti-corrosion coatings: one is that the stability of water-based epoxy emulsion is not good; the other is that the performance of water-based epoxy anti-corrosion coatings needs to be improved, mainly water resistance and salt spray resistance
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0053] Example 1: This example demonstrates a preparation method of a waterborne epoxy anticorrosion coating with excellent water resistance and salt spray resistance.
[0054](1) Preparation of component A: Add 33.6g of polyethylene glycol 4000, 5.5g of pyromellitic anhydride, and 10g of xylene in a three-necked flask, heat up to 120°C and react for 2 hours, then add epoxy resin E- 20, 10.1g, catalyst N,N-dimethylaniline 0.05g, heat up to 150°C and react for 5 hours, add 1.0g of triethanolamine to neutralize, add 20.0g of propylene glycol methyl ether and 16.9g of demineralized water, cool down, material. 87g of aqueous epoxy emulsifier was obtained. Then add 6.8g of water-based epoxy emulsifier, epoxy resin E-20, 44g, and 3g of propylene glycol methyl ether into the beaker, heat and dissolve evenly to 50°C, slowly add 45.4g of demineralized water under high-speed stirring, and then disperse at high speed for 30 Minutes, cool down, discharge, add BYK-021, 0.3g and BYK-346, ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention belongs to the technical field of coatings and discloses preparation of a waterborne epoxy anticorrosive coating with excellent water resistance and salt-fog resistance. In the preparation of the coating, a reactive waterborne epoxy emulsifier is synthesized. The coating comprises a component A and a component B, wherein the component A comprises waterborne epoxy emulsion, assistants and the like and accounts for 35-45% of the total mass fraction of the coating; and the component B comprises a waterborne epoxy hardener, pigment, filler assistants and the like and accounts for 55-65% of the total mass fraction of the coating. In the invention, by introducing bisphenol A chain segments, carboxyl groups and epoxy groups into the molecular structure of the waterborne epoxy emulsifier, the emulsifier has better emulsifying ability, and the particle diameter of the waterborne epoxy emulsion prepared by the emulsifier is smaller; and simultaneously, the emulsifier can participate in the curing reaction, thereby eliminating the influence of emulsifier components on the water resistance of the waterborne epoxy anticorrosive coating.
Description
technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to the preparation of a water-based epoxy anticorrosion coating with excellent water resistance and salt spray resistance. In the preparation of the coating, a reactive water-based epoxy emulsifier is synthesized. Background technique [0002] With the continuous acceleration of the global industrialization process, the consumption of petrochemical raw materials continues to increase, and the emissions to the atmosphere increase sharply, resulting in environmental degradation. Generally, solvent-based coatings contain nearly 50% organic volatiles. The annual output of this coating in my country is about 1 million. Tons, the total global production is about 10 million tons, there are millions of tons of organic volatiles, these organic volatiles are completely released into the atmosphere during the use of coatings, many volatiles are photoactive substances, they destroy t...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D7/12C09D5/08
Inventor 席发臣李志宝冯俊忠王国炜薛守成和虎
Owner 中昊北方涂料工业研究设计院有限公司