A kind of powder coating composition prepared by utilizing ultra-fine drill pipe and oil pipe inner coating epoxy powder waste

A powder coating and epoxy powder technology, applied in powder coatings, epoxy resin coatings, coatings, etc., can solve the problems of powder coating suspension, inability to electrostatic spraying, hazardous waste, etc., and achieve the effect of reducing hazardous waste.

Active Publication Date: 2022-05-20
海隆石油产品技术服务(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of preparing drill pipes and internal coating of epoxy powder coatings, about 10% of ultra-fine powder coatings of 5-20 microns are likely to be produced. The powder coating is suspended in the air. When the drill pipe and oil pipe are in the drill pipe, when the powder coating initially forms a cross-linked structure on the surface of the substrate and does not have a leveling effect, the ultra-fine powder will fall on the inner wall of the pipe fittings, causing various problems in the powder coating inside the pipe. The surface of the surface is pitted, and such ultra-fine powder coatings are usually treated as hazardous waste
[0003] There is no report about a method of reactive extrusion recycling ultra-fine drill pipe, oil pipe inner coating epoxy powder waste and the prepared powder coating composition

Method used

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  • A kind of powder coating composition prepared by utilizing ultra-fine drill pipe and oil pipe inner coating epoxy powder waste
  • A kind of powder coating composition prepared by utilizing ultra-fine drill pipe and oil pipe inner coating epoxy powder waste
  • A kind of powder coating composition prepared by utilizing ultra-fine drill pipe and oil pipe inner coating epoxy powder waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Table 1. Embodiment 1 powder coating formula

[0028]

[0029] Preparation method: Melt and extrude A, B, C, D, and E through a screw extruder at 130-150°C and press and break to obtain an intermediate, then add F, G, and H to the intermediate and mix and melt at 120-130°C Melt reaction extrusion, tablet crushing, and then adding I during the milling process, passing through a 100-mesh sieve, can obtain a powder coating with a qualified particle size between 20-150 microns.

[0030] The prepared powder coating TG2 is 120°C, gel time is 90S; the particle size range is 15-140 microns, the particle size range is D99140 microns, D50 is 80 microns, and D95 ​​is 120 microns. The steel pipe is heated to 230°C, sprayed with powder coating, and then cured for 90 minutes. The obtained coating can pass the SY / T 6717 (2016) and SY / T0544 (2016) standards.

Embodiment 2

[0032] Table 2. Embodiment 2 powder coating formula

[0033]

[0034] Preparation method: Melt and extrude A, B, C, D, and E through a screw extruder at 130-150°C and press and break to obtain an intermediate, then add F, G, and H to the intermediate and mix and melt at 120-130°C Melt reaction extrusion, tablet crushing, and then adding I during the milling process, passing through a 100-mesh sieve, can obtain a powder coating with a qualified particle size between 20-150 microns.

[0035] The prepared powder coating is TG2 106°C, gel time 110S; particle size range D99140 microns, D5080 microns, D95120 microns. The steel pipe is heated to 230°C, sprayed with powder coating, and then cured for 90 minutes. The obtained coating can pass the SY / T6717 (2016) and SY / T 0544 (2016) standards.

Embodiment 3

[0037] Table 3. Embodiment 3 powder coating formula

[0038]

[0039] Preparation method: Melt and extrude A, B, C, D, and E through a screw extruder at 130-150°C and press and break to obtain an intermediate, then add F, G, and H to the intermediate and mix and melt at 120-130°C Melt reaction extrusion, tablet crushing, and then adding I during the milling process, passing through a 100-mesh sieve, can obtain a powder coating with a qualified particle size between 20-150 microns.

[0040] The prepared powder coating is TG2 105°C, gel time 80S, particle size range 15-140 microns, particle size range D99140 microns, D50 80 microns, D95 120 microns. The steel pipe is heated to 230°C, sprayed with powder coating, and then cured for 90 minutes. The obtained coating can pass the SY / T 6717 (2016) and SY / T0544 (2016) standards.

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Abstract

The invention relates to the technical field of oil and gas exploitation, in particular to a powder coating composition prepared by using ultra-fine drill pipes and oil pipe inner coating epoxy powder waste, which is composed of the following components in the following weight percentages: bisphenol A epoxy resin 10-25 %, titanate chelating agent 1‑3%, urea-formaldehyde resin 1‑3%, filler 5‑25%, ultrafine powder coating waste 30‑50%, oxazolidinone epoxy resin 10‑20%, phenolic resin 5 ‑15%, imidazole accelerator 0.5‑2%, fumed silica 0.5‑1%. The invention also provides a preparation method of the coating composition. The present invention allows recycled drill pipes and oil pipes to be coated with epoxy powder coatings to be reused, and the particle size of the prepared powder coatings can meet the requirements of 20-150 microns, and pass the requirements of SY / T 6717 (2016) and SY / T 0544 (2016) Contains N 2 and CO 2 high temperature autoclave test.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploitation, in particular to a method for recycling superfine drill pipes and oil pipes by coating epoxy powder waste through reaction extrusion and the prepared powder coating composition. Background technique [0002] In the process of preparing drill pipes and internal coating of epoxy powder coatings, about 10% of ultra-fine powder coatings of 5-20 microns are likely to be produced. The powder coating is suspended in the air. When the drill pipe and oil pipe are in the drill pipe, when the powder coating initially forms a cross-linked structure on the surface of the substrate and does not have a leveling effect, the ultra-fine powder will fall on the inner wall of the pipe fittings, causing various problems in the powder coating inside the pipe. Such ultrafine powder coatings are usually treated as hazardous waste. [0003] There is no report about a method of reactive extrusion recycli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D163/02C09D161/24C09D161/06C09D5/03C09D7/61C09D7/63C09D7/65
CPCC09D163/00C09D5/033C09D5/031C08L2205/035C08L2205/025C08L2205/02C08K2003/3045C08L63/00C08L61/24C08L61/06C08K7/26C08K5/10C08K3/30C08K3/34C08K3/36Y02P70/10
Inventor 孙健蒋灿陈海林
Owner 海隆石油产品技术服务(上海)有限公司
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