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Coating for inner wall of ethanediol storage tank and preparation method for coating

A technology for ethylene glycol storage tanks and coatings, applied in the direction of coatings, etc., can solve problems such as unsuitable, polluted ethylene glycol quality, and important indicators exceeding the standard, and achieve excellent adhesion

Inactive Publication Date: 2013-01-16
SHANGHAI DATONG TABERNACLE NEW ENERGY SAVING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the coatings used on the inner wall of storage tanks are epoxy-type and polyurethane-type coatings. Due to the complexity of their own chemical structure and curing reaction, these coatings produce slow release phenomenon during storage, which will pollute the ethylene glycol. quality, causing its important indicators to seriously exceed the standard, so this kind of paint is not suitable as the inner wall paint of storage tanks for storing high-grade ethylene glycol

Method used

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  • Coating for inner wall of ethanediol storage tank and preparation method for coating
  • Coating for inner wall of ethanediol storage tank and preparation method for coating
  • Coating for inner wall of ethanediol storage tank and preparation method for coating

Examples

Experimental program
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Effect test

preparation example Construction

[0037] *Preparation of ethylene glycol soaking solution:

[0038] After mixing the paint prepared above evenly, paint it on the round rod of φ12*120, paint it 3-4 times in total, the time between paints is 24 hours, measure the thickness of the paint film to 200μm, and cure it under standard curing conditions for 7 Every day, each round rod is soaked with 100ml of high-grade ethylene glycol, and after 336 hours, the ultraviolet light transmittance of soaked ethylene glycol is tested.

Embodiment 1

[0040] The formula of its A component is as follows:

[0041] serial number

raw material name

mass percentage

1

special acrylic resin

50.0

2

solvent

18.5

3

paint

30.0

4

Dispersant

1.5

5

leveling agent

0.5

[0042] The formula of its B component is as follows:

[0043]

[0044] A component: B component = 1:5.

[0045] The above-mentioned special acrylic resin is a hydroxyl-containing acrylic resin with an index average molecular weight of 2000-5000, and the ratio of this range is as high as 95% or more, and the free monomer content is less than 0.3%;

[0046] Production process: In a clean container, add the above raw materials one by one, stir evenly, and then enter the sand mill to grind to a fineness of ≤ 20μm, and then get A component. In addition, in a dry and clean container, under the protection of nitrogen, add HDI curing agent and solvent, and s...

Embodiment 4

[0060] A preparation method for a coating for an inner wall of an ethylene glycol storage tank, the method comprising the following steps:

[0061] (1) Preparation of component A:

[0062] According to the formula requirements, in a clean container, add 45kg of acrylic resin and 30kg of solvent, after stirring evenly, add 28kg of pigment, 1.5kg of dispersant and 0.5kg of leveling agent in turn, enter the sand mill and grind until the fineness is ≤ 20μm, and get A component;

[0063] (2) Preparation of component B:

[0064] In a dry and clean container, under the protection of nitrogen, add 17kg of HDI curing agent and 8kg of butyl acetate, and stir evenly to obtain component B;

[0065] (3) Preparation of paint

[0066] Mix components A and B with a weight ratio of 5:1 to get the product.

[0067] The above-mentioned acrylic resin is a hydroxyl-containing acrylic resin with an index average molecular weight of 2000-5000, a ratio of this range as high as more than 95%, and ...

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Abstract

The invention relates to a coating for an inner wall of an ethanediol storage tank and a preparation method for the coating. The method comprises the following steps of: according to formula requirements, adding an acrylic resin and a solvent into a clean container, uniformly stirring, sequentially adding a pigment, a dispersing agent and a levelling agent, and grinding in a sand mill until the fineness is less than or equal to 20 mu m to obtain a component A; adding a hexamethylene diisocyanate (HDI) curing agent and n-butyl acetate into the dry and clean container under the protection of nitrogen, and uniformly stirring to obtain a component B; and mixing the component A and the component B uniformly to obtain the product. Compared with the prior art, the invention has the advantages that the grade of ethanediol can be kept, a degradation phenomenon is prevented and the like.

Description

technical field [0001] The invention relates to a coating, in particular to a coating for the inner wall of an ethylene glycol storage tank and a preparation method thereof. Background technique [0002] As an important chemical raw material, ethylene glycol has many applications in many industrial fields, and is the main raw material for the production of PET resin, polyester, etc., among which ethylene glycol used to produce bottle-grade PET resin accounts for 34% of the total . As people's requirements for environmental protection and sanitation become more and more stringent, the purity requirements of ethylene glycol for the production of bottle-grade PET resin are also getting higher and higher. Therefore, the ethylene glycol for producing bottle-grade PET resin now uses high-grade products, as The storage of high-grade ethylene glycol quality has become one of the most important links. [0003] At present, most of the coatings used on the inner wall of storage tanks...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/00C09D7/12
Inventor 杨志英
Owner SHANGHAI DATONG TABERNACLE NEW ENERGY SAVING MATERIALS CO LTD