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.
CN112852256BActive 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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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
海隆石油产品技术服务(上海)有限公司
Publication Date
2022-05-20

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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.
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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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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