Color UV curable coating dedicated for oil couplings / color wheels

Abstract

The invention discloses a color UV curable coating dedicated for oil couplings / color wheels. The coating is prepared by using a mixture of an urethane acrylate resin with high reactivity, low molecular weight and 4-6 functionalities for improving film strength and an urethane acrylate resin with medium reactivity, medium-low molecular weight and 2-3 functionalities for improving film flexibility as main resin; adding a reactive diluent, a photosensitizer, etc. to form film via UV curing reaction; and adding non-toxic coloring pigments, non-toxic anti-rust pigments and additives, etc. According to the invention, via rational choice and allocation of components, the prepared color UV curable coating is a novel color protective coating which is high cost-effective, good in storage stability, difficult to precipitate, good in application property, anti-sagging, zero in VOC emissions, good in adhesion, weatherproof , rust-proof, non-toxic and environmentally friendly.

Description

technical field [0001] The invention relates to the field of chemical coatings, in particular to a colored UV curable coating used for petroleum couplings / color rings. Background technique [0002] Coupling marking and color ring marking are a method to characterize the grade of oil casing steel, and are used in the oil pipe production industry and drilling industry to distinguish pipes, coupling materials and steel products, and are also used as permanent quality traceability marks. When many kinds of casing are stored in the warehouse, the steel grade of the casing can be quickly distinguished by checking the color of the coupling and the number of color rings. The coupling has gone through a series of processes of paint spraying, screwing, shipping, long-distance transportation, and arriving at the customer's warehouse. Mainly, color UV light-cured coatings have disadvantages such as poor adhesion, impact resistance, salt spray resistance and environmental protection. P...

AI Technical Summary

Problems solved by technology

The coupling has gone through a series of processes of paint spraying, screwing, shipping, long-distance transportation, and arriving at the customer's warehouse. Mainly, color UV light-cured coatings have disadvantages such as poor adhesion, impact resistance, salt spray resistance and environmental protection.

Poor quality coatings will have problems such as discoloration and peeling after repeated mishandling and exposure to the sun and rain, which seriously affects the appearance of the casing, making users doubt the internal quality of the casing, and after the coating falls off, the surface of the coupling is not protected , cause corrosion, and seriously affect the identification of casing steel grades. If there is an identification error, it may even cause the entire oil well to be scrapped, resulting in high economic losses

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