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Waterborne acrylic acid modified epoxy emulsion and high-performance waterborne epoxy anticorrosive coating

A water-based acrylic and epoxy emulsion technology, used in anti-corrosion coatings, coatings, etc., can solve the problem of high VOC content, and achieve the effects of low VOC content, short coating interval, and good workability

Active Publication Date: 2017-05-10
MARINE CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the curing agent colloid solution with emulsification usually contains a certain amount of co-solvent, and the VOC content is relatively high

Method used

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  • Waterborne acrylic acid modified epoxy emulsion and high-performance waterborne epoxy anticorrosive coating
  • Waterborne acrylic acid modified epoxy emulsion and high-performance waterborne epoxy anticorrosive coating
  • Waterborne acrylic acid modified epoxy emulsion and high-performance waterborne epoxy anticorrosive coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The amounts of the substances in Example 1 are calculated in parts by weight.

[0044] ①Add 9 parts of polyisocyanate (TDI) into the four-neck flask, heat up to 66-70°C, add 23 parts of alkylphenol polyether emulsifier (TX-15), EO / PO block polyether (Haian Chemical Co., Ltd. L-35) 23 parts, continue to stir and keep warm for 2 hours, add 44 parts of E-44 epoxy resin, raise the temperature to 85-90°C, continue to keep warm and stir for 2 hours, and obtain the epoxy resin polyether adduct.

[0045] ② Add 150 parts of E-51 epoxy resin, 125 parts of E-20 epoxy resin, 14 parts of propylene glycol butyl ether, 12 parts of dipropylene glycol methyl ether in the flask, and the epoxy resin polyether adduct obtained in the first step is 99 parts Heat up to 88-92°C and keep stirring until the epoxy resin is completely melted and the mixture is uniform and transparent. Gradually add 300 parts of deionized water and stir until phase inversion. Cool down to 70-80°C to form an O / W emu...

Embodiment 2

[0048] The preparation process of embodiment 2 is the same as that of embodiment 1. The alkylphenol polyether used in the preparation of the epoxy polyether adduct is TX-21, and the block polyether is L-45. The polyisocyanate is TDI. The obtained emulsion is uniform and fine, with good stability; viscosity: 2100mPa.s; solid content: 52.5%; uniform and smooth coating film.

Embodiment 3

[0049] The preparation process of embodiment 3 is the same as that of embodiment 1. The alkylphenol polyether used in the preparation of the epoxy polyether adduct is TX-15, and the block polyether is L-35. The polyisocyanate is IPDI. The obtained emulsion is uniform and delicate, with good stability; viscosity: 1700mPa.s; solid content: 52.6%; uniform and smooth coating film.

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Abstract

The invention discloses a waterborne acrylic acid modified epoxy emulsion. Firstly, epoxy resin, polyisocyanates and alkyl phenol polyether react to prepare an epoxy polyether addition product, then the addition product is used as an emulsifying agent to be mixed with epoxy resin and a cosolvent, stirring and emulsification are performed to prepare an epoxy resin emulsion, an acrylic monomer pre-emulsifying solution prepared from an acrylic acid and vinyl mixed monomer, the emulsifying agent, initiator and deionized water is dropwise added into the emulsion, and acrylic acid-epoxy resin grafting hybridization emulsion polymerization is performed to obtain the waterborne acrylic acid modified epoxy emulsion. The invention further discloses a double-component waterborne epoxy anticorrosive coating obtained by using the emulsion as a main component and adding a pigment, a filler, various additives and the like. The VOC content is low and is reduced by 80% compared with the VOC content of solvent paint, the coating application property is good, a paint film is quick to dry, coating interval time is short, the mechanical properties and anticorrosive performance of the paint film can reach the level of solvent type epoxy anticorrosive paint, and the coating is suitable for anticorrosive coating of ships, container, railway vehicles and steel components of auto spare parts.

Description

technical field [0001] The invention relates to the field of anti-corrosion coatings, in particular to a preparation method of an environment-friendly two-component water-based epoxy anti-corrosion coating. Background technique [0002] Traditional anti-corrosion coatings are mostly solvent-based coatings, in which the content of organic solvents generally reaches about 40-60% of the finished coating. When using, 10-20% solvent is often added to dilute it for the convenience of construction. These solvents will be volatilized during the coating construction process, causing waste of resources, environmental pollution, endangering the health of construction and users, and generating fire hazards. In recent years, countries around the world have strengthened laws and regulations on VOC emissions from coatings, prompting the coatings industry around the world to step up research on environmentally friendly coatings with low VOC emissions. Water-based anti-corrosion coatings ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D151/08C09D5/08C08F283/10C08F220/18C08F212/08
CPCC08F283/10C09D5/08C09D151/08C08F220/1804
Inventor 侯佩民徐元浩王晓于杰卢伟赵君
Owner MARINE CHEM RES INST
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