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CN-122011882-A - High-weather-resistance electric conduit and preparation process thereof

CN122011882ACN 122011882 ACN122011882 ACN 122011882ACN-122011882-A

Abstract

The invention relates to a high weather resistance electric conduit and a preparation process thereof, and belongs to the technical field of electric conduits. The electrical conduit comprises a base pipe and a weather-proof protective coating compounded on the surface of the steel base pipe, wherein the weather-proof protective coating is obtained by coating weather-proof protective coating on the outer surface of the base pipe and curing, the weather-proof protective coating is prepared by the following formula of 55-75 parts by weight of epoxy resin, 5-10 parts by weight of composite filler, 1-2 parts by weight of flatting agent, 1-2 parts by weight of defoamer, 10-20 parts by weight of curing agent and 40-60 parts by weight of solvent, and the composite filler is of a graphite phase carbon nitride-hydroxyapatite composite structure with the surface modified by dodecyl phosphate.

Inventors

  • XU HUAN
  • XU LINGLING
  • ZHANG JIERU
  • HE JIANYONG

Assignees

  • 申捷科技（苏州）有限公司

Dates

Publication Date
20260512
Application Date
20260228

Claims (10)

  1. 1. A high weather resistance electric conduit is characterized in that the electric conduit comprises a base pipe and a weather resistance protective coating compounded on the surface of the steel base pipe, The weather-proof protective coating is obtained by coating the weather-proof protective coating on the outer surface of a base pipe and curing, wherein the formula of the weather-proof protective coating comprises, by weight, 55-75 parts of epoxy resin, 5-10 parts of composite filler, 1-2 parts of flatting agent, 1-2 parts of defoaming agent, 10-20 parts of curing agent and 40-60 parts of solvent; Wherein, the preparation method of the composite filler is as follows, S1-1, dispersing hydroxyapatite nano sheets in a melamine aqueous solution, stirring at 60-70 ℃ until moisture evaporates, transferring into a tube furnace, roasting in a high-purity nitrogen atmosphere, naturally cooling, dispersing the product in deionized water, carrying out ultrasonic treatment for 1-2 h, centrifugally collecting solids, washing with deionized water, and then carrying out vacuum drying at 60-80 ℃ for 12 h to obtain powder A; And S1-2, dispersing the powder A into deionized water, stirring for 30-60 min at 60-70 ℃, dropwise adding an aqueous solution of dodecyl phosphate, keeping the temperature, continuously stirring for 4-6 h, centrifugally collecting solids, washing with deionized water, and then vacuum-drying at 60-80 ℃ for 12h to obtain the composite filler.
  2. 2. The high-weather-resistance electrical conduit according to claim 1, wherein the mass ratio of the hydroxyapatite nano sheet to the melamine in the S1-1 is 1 (5-15).
  3. 3. The high weather resistance electrical conduit according to claim 1, wherein the calcination parameters in S1-1 are set to raise the temperature to 500-550 ℃ at 2-5 ℃ per minute and keep the temperature for 2-4 hours.
  4. 4. The high weather resistance electrical conduit according to claim 1, wherein the ultrasonic power in S1-1 is 80-120W.
  5. 5. The high weather resistance electrical conduit according to claim 1, wherein the mass ratio of powder A to dodecyl phosphate in S1-2 is 1 (0.05-0.2).
  6. 6. The high weatherability electrical conduit according to claim 1, wherein the leveling agent is one or more of BYK-360P, BYK-333, digao 410.
  7. 7. The high weatherability electrical conduit of claim 1, wherein the defoamer is one or both of benzoin, BYK-024.
  8. 8. The high weatherability electrical conduit according to claim 1, wherein the epoxy resin is E-12, the curing agent is dicyandiamide, and the solvent is ethanol.
  9. 9. A process for preparing a high weather resistance electrical conduit according to any one of claims 1 to 8, wherein the process comprises the steps of, S9-1, preprocessing a base pipe, namely performing shot blasting rust removal on the outer surface of the steel base pipe, and then performing phosphating treatment; s9-2, preparing a coating, namely mixing epoxy resin, composite filler, a leveling agent, a defoaming agent and a half of solvent by weight, dispersing for 30-60 min to prepare slurry, adding a curing agent and the residual solvent, and continuing dispersing for 30-60 min to obtain the weather-resistant protective coating; S9-3, coating application, namely coating the weather-proof protective coating on the outer surface of the pretreated base pipe to obtain the weather-proof protective coating, pre-curing for 20-40 min at 40-60 ℃, and then heating to 80-100 ℃ and further curing for 40-60 min to obtain the high weather-proof electrical conduit.
  10. 10. The process for preparing a high weather resistance electrical conduit according to claim 9, wherein the weather resistance protective coating is 150-250 μm thick.

Description

High-weather-resistance electric conduit and preparation process thereof Technical Field The invention belongs to the technical field of electrical conduits, and relates to a high-weather-resistance electrical conduit and a preparation process thereof. Background Electrical conduits are critical components in the building, industrial and infrastructure fields for protecting, routing and insulating electrical wires and cables, which are subject to a number of factors such as ultraviolet radiation, rain erosion, temperature cycling, chemical medium corrosion and physical impact when exposed to outdoor or harsh industrial environments for extended periods of time. Thus, the weatherability, corrosion resistance and mechanical durability of the catheter outer protective coating directly determine the safety reliability and service life of the overall electrical system. Currently, high-protection electrical conduits on the market mainly adopt a composite structure of a metal base tube and an organic coating. However, the prior art generally has the problems of single function limitation, poor interface compatibility, lack of an active protection mechanism, insufficient dispersion and stability of inorganic fillers, and the like. Therefore, a novel composite filler and a matched coating system thereof are developed, so that the novel composite filler can synchronously realize long-acting physical shielding, active environment response and good compatibility with resin, and further, the high-weather-resistance electric conduit is prepared, and the novel composite filler has important industrial application value and practical significance. Disclosure of Invention The invention aims to provide a high-weather-resistance electric conduit and a preparation process thereof, and the high-weather-resistance electric conduit has the characteristics of good mechanical property, high weather resistance and high corrosion resistance. The aim of the invention can be achieved by the following technical scheme: A high weather-resistant electric conduit comprises a base pipe and a weather-resistant protective coating compounded on the surface of the steel base pipe, The weather-proof protective coating is obtained by coating the weather-proof protective coating on the outer surface of a base pipe and curing, wherein the formula of the weather-proof protective coating comprises, by weight, 55-75 parts of epoxy resin, 5-10 parts of composite filler, 1-2 parts of flatting agent, 1-2 parts of defoaming agent, 10-20 parts of curing agent and 40-60 parts of solvent; Wherein, the preparation method of the composite filler is as follows, S1-1, dispersing hydroxyapatite nano sheets in a melamine aqueous solution, stirring at 60-70 ℃ until moisture evaporates, transferring into a tube furnace, roasting in a high-purity nitrogen atmosphere, naturally cooling, dispersing the product in deionized water, carrying out ultrasonic treatment for 1-2 h, centrifugally collecting solids, washing with deionized water, and then carrying out vacuum drying at 60-80 ℃ for 12 h to obtain powder A; And S1-2, dispersing the powder A into deionized water, stirring for 30-60 min at 60-70 ℃, dropwise adding an aqueous solution of dodecyl phosphate, keeping the temperature, continuously stirring for 4-6 h, centrifugally collecting solids, washing with deionized water, and then vacuum-drying at 60-80 ℃ for 12h to obtain the composite filler. As a preferable technical scheme of the invention, the mass ratio of the hydroxyapatite nano sheet to the melamine in the S1-1 is 1 (5-15). As a preferable technical scheme of the invention, the roasting parameters in the S1-1 are set to be heated to 500-550 ℃ at 2-5 ℃ per minute and are kept for 2-4 hours. As a preferable technical scheme of the invention, the ultrasonic power in the S1-1 is 80-120W. As a preferable technical scheme of the invention, the mass ratio of the powder A to the dodecyl phosphate in the S1-2 is 1 (0.05-0.2). As a preferable technical scheme of the invention, the leveling agent is one or more of BYK-360P, BYK-333 and Digao 410. As a preferable technical scheme of the invention, the defoaming agent is one or two of benzoin and BYK-024. As a preferable technical scheme of the invention, the type of the epoxy resin is E-12, the curing agent is dicyandiamide, and the solvent is ethanol. A preparation process of a high-weather-resistance electric conduit comprises the following steps of, S9-1, preprocessing a base pipe, namely performing shot blasting rust removal on the outer surface of the steel base pipe, and then performing phosphating treatment; s9-2, preparing a coating, namely mixing epoxy resin, composite filler, a leveling agent, a defoaming agent and a half of solvent by weight, dispersing for 30-60 min to prepare slurry, adding a curing agent and the residual solvent, and continuing dispersing for 30-60 min to obtain the weather-resistant protective coating; S9-3, coating application, namely co