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Polymerization-inhibiting coating and its preparation method and application in styrene monomer storage tank

A technology of coating and polymerization inhibition, applied in coatings, chemical instruments and methods, epoxy resin coatings, etc., can solve the problems of decreased polymerization inhibition effect, etc. Effect

Active Publication Date: 2020-11-17
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a polymerization inhibitor coating and its preparation method and its application in styrene monomer storage tanks. By changing the formulation of the polymerization inhibitor and different coating material formulations, the coating preparation conditions are eased and the energy consumption is small. , through the synergistic effect of the polymerization inhibitor and the dispersant, the formation of oligomers on the coating can be blocked, the polymerization inhibition effect of the coating can be improved, and the difficult problem of the decrease of the polymerization inhibition effect in the later stage of the release of the coating polymerization inhibitor in the prior art can be solved , looking for a long-term and effective polymerization inhibition effect, prolonging the cleaning cycle of styrene monomer storage tanks

Method used

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  • Polymerization-inhibiting coating and its preparation method and application in styrene monomer storage tank
  • Polymerization-inhibiting coating and its preparation method and application in styrene monomer storage tank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0040] Embodiment 1~5: coating base material preparation

[0041] In a 1L reactor with a stirrer and a reflux condenser, add 300g of EP828 epoxy resin and 100g of dimethylethanolamine, and heat up under nitrogen to prepare the coating base material. The finished product curing agent is added to the prepared base material for stirring, wherein the mixing ratio of the base material and thick paste 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.

[0042] Table 1 Preparation conditions of base material for coating surface layer

[0043] Example Reaction temperature / ℃ Reaction time / h Coating Adhesion 1 95 5 Level 3 2 105 3 Level 2~3 3 115 3 Level 2~3 ...

Embodiment 6～10

[0045] Embodiments 6-10: Preparation of coating intermediate layer

[0046] In a 10L reactor with a stirrer, add the epoxy resin paint base material described in Example 3, add p-tert-butylcatechol (TBC) and dihydroxypropyl catechol (TBC) that are uniformly ground to the system in proportion under stirring conditions Hydroxylamine (HPHA) compound, the ratio of TBC / HPHA is 7:1, heat preservation reaction for 1h, to obtain coating base materials with different polymerization inhibition properties. Before painting, add the auxiliary material thick paste amine adduct to the above-mentioned base material for stirring, wherein the mixing ratio of base material and thick paste amine adduct is 6:1 (volume ratio), and the stirring time is 0.5h. Then paint the above material on the standard tinplate plate (50×100×0.2~0.3mm), and the coating thickness is about 100 μm. After the coating was dry, the adhesion was tested, and the test results under different reaction conditions are shown i...

Embodiment 11～17

[0050] Embodiment 11~17: coating surface layer preparation

[0051] Add the auxiliary material thick paste amine adduct into a 10L reactor with a stirrer, after the dispersant is ground evenly, add it into the reactor under stirring conditions, and keep it warm for 0.5-2 hours to obtain coating auxiliary materials with different dispersion properties . Add the auxiliary material to the base material for stirring before painting, wherein the mixing ratio of base material and auxiliary material 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 3:

[0052] Table 3 Preparation conditions of coating surface layer

[0053] Example Dispersant type Amount of dispersant / % temperature reflex Reaction time Coating Adhesion 11 Triphenylphosphine 1 20 ...

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Abstract

The invention belongs to the technical field of hydrocarbon stabilization, and more specifically relates to a polymerization inhibiting coating layer, a preparation method thereof, and applications ofthe polymerization inhibiting coating layer in styrene monomer storage tanks. The polymerization inhibiting coating layer comprises a bottom layer, a middle layer, and a surface layer; each layer isprepared from a raw material containing a base material, and an auxiliary material or a curing agent; the base materials are prepared from epoxy resin and alcohol amine auxiliary materials; the base material of the middle layer contains a polymerization inhibitor; the surface layer auxiliary material or the curing agent contains a dispersant. According to the preparation method, the polymerizationinhibitor formula and the coating material formula are changed, coating layer preparation conditions are mild, energy consumption is low, the cooperative effect of the polymerization inhibitor with the dispersant is capable of inhibiting formation of oligomers on the coating layer, and coating layer polymerization inhibition effect is improved.

Description

technical field [0001] The invention belongs to the technical field of stabilizing hydrocarbons, and in particular relates to a polymerization-inhibiting coating, a preparation method thereof, and an application in a styrene monomer storage tank. Background technique [0002] Styrene monomer has active chemical properties and is an important polymer monomer. It 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 styrene 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, hydroquinone, p-hydroxyanisole, etc., which are crystalline substances at room temperature. During storage, at a certain temperature, part of the aromatic olefin monomer in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D7/63C07C7/20C07C15/46
CPCC07C7/20C08K5/13C08K5/17C09D163/00C07C15/46
Inventor 菅秀君王申军贾庆龙朱相春解洪梅
Owner CHINA PETROLEUM & CHEM CORP
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