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Water-based zinc-plating coating for refrigerated containers

A water-based technology for refrigerated containers, applied in anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc., can solve problems such as high VOC of cold-sprayed zinc, failure to meet the VOC emission standards of water-based coatings for containers, and solvent volatilization, etc., to achieve The effect of excellent anti-corrosion performance

Inactive Publication Date: 2021-03-19
锌盾化工无锡有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this product is a solvent-based product. Although the VOC can be lower than 200g / L, the VOC of cold-sprayed zinc is still high. There is a large amount of solvent volatilization during the construction process, which does not meet the VOC emission standard of JH / T E06-2015 container water-based coatings.

Method used

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  • Water-based zinc-plating coating for refrigerated containers
  • Water-based zinc-plating coating for refrigerated containers

Examples

Experimental program
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Effect test

Embodiment 1-5

[0039] A water-based galvanized coating for refrigerated containers, which is made by mixing two components A and B at a ratio of 5:1 by weight, wherein component A is wetted by deionized water, defoamer, dispersant, and substrate Agent, cellulose, water-based acrylic acid or water-based polyurethane, alcohol ester 12 compatibility, component B is composed of black flaky zinc powder, spherical zinc powder, zinc aluminum alloy powder, and silane coupling agent. The manufacturing method is:

[0040] (1) Put deionized water, defoamer, dispersant, substrate wetting agent, cellulose, water-based acrylic acid or water-based polyurethane, and alcohol ester 12 into the tank according to the weight ratio, and stir at 800 rpm 20 minutes, then grind all the materials through a grinder to a fineness of less than 20um, filter and pack through a 200-mesh filter to obtain component A of water-based galvanized paint;

[0041] (2) Mix the silane coupling agent with ethanol, add black flaky zin...

Embodiment A

[0043] See Table 1 for the selection and weight ratio of the raw materials of components A and B in each embodiment.

[0044]

[0045] Examples 1-5 are water-based galvanized coatings of the present invention, and the technical indicators of the water-based water-based epoxy zinc-rich coating are compared in Table 2

[0046]

[0047] It can be seen that the anti-corrosion performance of the water-based galvanized coating is far superior to that of the current containerized water-based epoxy zinc-rich coating.

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Abstract

A water-based galvanized coating for refrigerated containers belongs to the technical field of anticorrosive coatings and is prepared by mixing a component A and a component B. The component A is prepared by mixing deionized water, an antifoaming agent, a dispersing agent, a base material wetting agent, cellulose, water-based acrylic acid or water-based polyurethane and alcohol ester-12 accordingto a weight part ratio of 5:1. The component B is composed of black flaky zinc powder, spherical zinc powder, zinc-aluminum alloy powder and a silane coupling agent. The coating, as a water-based product, can be lower than 50 g / L in VOC, wherein the emission reduction is obvious compared with the VOC content of 450 g / L of solvent type cold spraying zinc, and the zinc-aluminum alloy pigment has theeffective cathodic protection effect of a pure Zn layer on a steel base body. The product is sufficient in aluminum, so that a complete Al2O3 protective film can be formed, and corrosion resistance is improved.

Description

technical field [0001] The invention belongs to the technical field of anticorrosion coatings, in particular to a water-based galvanized coating for refrigerated containers. Background technique [0002] A large amount of coatings are applied during the manufacturing process of containers. The global annual demand for container coatings reaches 300,000 tons, worth about 5 billion yuan. The maximum annual output of container coatings in my country is about 380,000 tons. Based on the usage of 70 kg / TEU, the market demand for container coatings is considerable. Refrigerated container (Reefer container) refers to a special container that has good heat insulation and can maintain a certain low temperature requirement, and is suitable for the transportation and storage of various perishable foods. At present, ordinary containers have achieved water-based coating, and water-based epoxy zinc-rich and its supporting systems are used to complete anti-corrosion protection. However, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/10C09D133/00C09D175/04
CPCC08K2003/0812C08K2003/0893C09D5/106C09D133/00C09D175/04C08K13/06C08K9/06C08K7/00C08K7/18C08K3/08
Inventor 杨志华褚路轩周贤辉孟庆志
Owner 锌盾化工无锡有限公司
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