Preparation method of polymerization-inhibiting coating for aromatic olefin monomer

A technology for aromatic olefins and coatings, which is applied in the field of preparation of polymerization inhibitor coatings, and can solve the problem that there is no report on the specific method of the release rate of polymerization inhibitor coating adhesion change, no disclosure of coating preparation process conditions, brushing Problems such as many steps, to achieve the effect of prolonging the period of maintenance and cleaning tanks, eliminating product pollution, and reducing the amount of coating

Active Publication Date: 2017-12-22
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this document has many steps of brushing, does not disclose coating preparation process condition, used coating inhibitor, curing agent etc. are obviously different from the present invention, and inhibitor adopts the adding method after first dissolving with solvent, and procedure is complicated, also does not report inhibitor. Changes in adhesion of the coating after the polymerization agent is added, and the specific method of controlling the release rate of the polymerization inhibitor. The inspection period of the polymerization inhibition effect is only 3 months

Method used

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  • Preparation method of polymerization-inhibiting coating for aromatic olefin monomer
  • Preparation method of polymerization-inhibiting coating for aromatic olefin monomer
  • Preparation method of polymerization-inhibiting coating for aromatic olefin monomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0029] Embodiment 1~5: coating surface layer base material preparation

[0030]In a 1L reactor with a stirrer and a reflux condenser, add 400g of EP828 epoxy resin and 100g of glycidyl ether additive, and heat up under nitrogen atmosphere to prepare the base material for the coating surface layer; The pulp amine adduct curing agent is added to the prepared base material for stirring, wherein the mixing ratio of base material and thick pulp amine adduct is 6:1 (volume ratio), and the stirring time is 0.3h. Then paint the above-mentioned epoxy resin paint on the standard tin plate (50×100×0.2~0.3mm), and the thickness of the coating is about 100 μm. After the coating was dry, the adhesion was tested, and the test results under different reaction conditions are shown in Table 1.

[0031] Table 1 Preparation conditions of coating surface layer base material

[0032] Example

[0033] It can be seen from Table 1 that the coating materials prepared by the above methods ca...

Embodiment 6～16

[0034] Embodiment 6~16: the base material preparation of coating bottom layer (preparation of base material for polymerization inhibition coating)

[0035] After the reaction as described in Example 3 is completed, lower the temperature to 50-90°C, continue to stir, add one or two compound polymerization inhibitors to the system, and keep warm for 1-3 hours to obtain coatings with different polymerization inhibition properties Binder. Similarly, before painting, add the thickener amine adduct curing agent to the above-mentioned base material for stirring, wherein the mixing ratio of the base material and the thicker amine adduct is 8:1 (volume ratio), and the stirring time is 1h. Then paint the above material on the standard tinplate plate (50×100×0.2~0.3mm), and the coating thickness is about 80 μm. After the coating dries up, the adhesion is tested, and the results are shown in Table 2:

[0036] Table 2 Preparation conditions of polymerization inhibition coating base mater...

Embodiment 17～20

[0041] Examples 17-20: Investigation of the polymerization inhibition effect of the polymerization inhibition coating

[0042] Brush epoxy resin paint on the inner wall of the tank roof of 5L styrene storage tank. The preparation method of epoxy resin paint is as follows: In a 1L reactor with agitator and reflux condenser, add 500g of EP828 epoxy resin, shrink 120g of glycerol ether additive, purged with nitrogen for 10 minutes, started stirring, heated up to 170°C, reacted for 2 hours, cooled down to 60°C, and took out about half of the reactants for use. Then add the composite polymerization inhibitor TBBQ+HPHA to the system, the addition amount is 27% of the amount of reactants, the compounding mass ratio of TBBQ and HPHA is 3:1, and keep warm for 2 hours at 60°C to obtain a coating with polymerization inhibition performance. layer base.

[0043] The roof of the styrene storage tank is painted with two layers of overcoating, in which the mixing ratio of the base material a...

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Abstract

The invention relates to a method for preparing a polymerization-resisting coating for aromatic olefin monomers, and belongs to the technical field of storage of aromatic olefin monomers. In the present invention, under nitrogen protection conditions, EP828 type epoxy resin is used as a raw material, and ether additives are added to react to prepare the base material of the coating surface layer; then the heating and stirring reaction is carried out according to the steps described in the preparation of the coating surface layer base material Finally, lower the temperature, add a polymerization inhibitor to the system, carry out heat preservation reaction, and prepare the base material of the coating bottom layer; add the curing agent to the above two base materials and mix evenly; Brush the inner wall of the body storage tank, first brush the bottom base material to form the bottom coating, and then brush the surface base material to form the surface coating. The polymerization inhibitor of the present invention has a large amount of addition, a long duration of polymerization inhibition of the coating, a small amount of coating, good adhesion, and can effectively control the release rate of the polymerization inhibitor in the coating, thereby achieving the effect of long-term polymerization inhibition. Solve the polymerization phenomenon in the storage process of aromatic olefin monomer.

Description

technical field [0001] The invention relates to a method for preparing a polymerization-resisting coating for aromatic olefin monomers, and belongs to the technical field of storage of aromatic olefin monomers. Background technique [0002] Aromatic olefin monomers are chemically active. For example, styrene is an important polymerizable monomer, which can be polymerized by itself or with other monomers, and is widely used in the fields of synthetic polymer materials, coatings, and medicine. Styrene undergoes slow thermally activated polymerization at ambient temperature. Therefore, when the aromatic olefin monomer is transported or stored, a polymerization inhibitor must be added to ensure product quality. [0003] Commonly used storage inhibitors are tert-butylcatechol (TBC), 2,5-di-t-pentylhydroquinone, benzoquinone, hydroquinone, p-hydroxyanisole, etc., which are crystalline at room temperature substance. During storage, at a certain temperature, part of the aromatic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/08C09D5/00B32B27/38C09D163/00C09D7/12C07C15/46C07C7/20C07C25/28C07C17/42
Inventor 菅秀君王申军潘清马瑞杰贾庆龙
Owner CHINA PETROLEUM & CHEM CORP
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