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Solvent-free epoxy coating for long distance pipeline repaired mouth

A technology for long-distance pipelines and epoxy coatings, applied in the direction of epoxy resin coatings, coatings, etc., which can solve the harsh construction requirements of primers and heat shrinkable tapes, the difficulty in guaranteeing the quality of baking bonding, and the lack of outstanding anti-corrosion functions, etc. problems, to achieve the effect of excellent storage stability, excellent constructability, and good peel strength

Active Publication Date: 2009-06-17
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the structure of primer + heat-shrinkable tape is mostly used for pipe joint joints. The main function of the primer is to improve the resistance of the heat-shrinkable tape to cathodic disbonding, and its anti-corrosion function is not outstanding; The quality of baking bonding is difficult to guarantee, and the result is that once the shrinkage tape leaks into the water, the steel pipe has no barrier
Moreover, the epoxy primer currently used requires coating the heat shrinkable tape in the dry state of the primer, mainly because the current epoxy primer is based on the reaction activity in the dry state and the hot melt adhesive in the molten state. Reaction, to achieve the effect of fusion bonding, but after hard drying, it cannot produce effective fusion bonding with hot melt adhesive, resulting in unqualified joints

Method used

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  • Solvent-free epoxy coating for long distance pipeline repaired mouth

Examples

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Comparison scheme
Effect test

Embodiment 1

[0013] The invention discloses a method for manufacturing a solvent-free epoxy coating for joint joints of long-distance pipelines. In a stainless steel barrel, add 0.06 parts by weight of polycarboxylic acid solution containing amine derivatives, 0.01 parts by weight of acrylate copolymer, and 0.015 parts by weight of polysilicon in 1 part by weight of bisphenol F epoxy resin. Oxane solution, 0.02 parts by weight of polyether siloxane copolymer, and 0.02 parts by weight of urethane oligomer solution are heated, controlled at 25°C, mixed, and stirred at a high speed. Add the fumed silica powder of 0.025 parts by weight, the carbon black of 0.002 parts by weight, the precipitated barium sulfate of 0.24 parts by weight, the mica powder of 0.2 parts by weight, the quartz powder of 0.2 parts by weight, the silicon carbide of 0.3 parts by weight, the silicon carbide of 0.07 parts by weight 1 part of chromium oxide green, stirred at high speed for 0.25h, and ground it with a sand mi...

Embodiment 2

[0015] The manufacture method of the solvent-free epoxy paint for long-distance pipeline filling of the present invention is characterized in that in the bisphenol F epoxy resin of 1 weight part, successively add the polycarboxylic acid solution of 0.01 weight part containing amine derivative, 0.005 The acrylate copolymer of parts by weight, the polysiloxane solution of 0.005 parts by weight, the polyether siloxane copolymer of 0.005 parts by weight, the urethane oligomer solution of 0.01 parts by weight, it is heated, controlled temperature At 25°C, mix and stir at high speed, add 0.01 parts by weight of fumed silica powder, 0.002 parts by weight of carbon black, 0.1 parts by weight of precipitated barium sulfate, 0.1 parts by weight of mica powder, 0.1 parts by weight of Part of quartz powder, 0.1 part by weight of silicon carbide, 0.01 part by weight of chromium oxide green, after stirring at high speed for 0.25h, grind 0.5 part with a sand mill to make liquid A in the coati...

Embodiment 3

[0017] The manufacture method of the solvent-free epoxy paint for long-distance pipeline repairing of the present invention is characterized in that in the bisphenol F epoxy resin of 1 weight part, add successively the polycarboxylic acid solution containing amine derivative of 0.1 weight part, 0.05 The acrylate copolymer of parts by weight, the polysiloxane solution of 0.05 parts by weight, the polyether siloxane copolymer of 0.05 parts by weight, the urethane oligomer solution of 0.05 parts by weight, it is heated, controlled temperature At 25°C, mix and stir at high speed, add 0.05 parts by weight of fumed silica powder, 0.01 parts by weight of carbon black, 0.5 parts by weight of precipitated barium sulfate, 0.3 parts by weight of mica powder, 0.5 parts by weight of Part of quartz powder, 0.5 parts by weight of silicon carbide, 0.1 parts by weight of chromium oxide green, after stirring at high speed for 0.25h, grind 1h with a sand mill to make liquid A in the coating; in 1...

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Abstract

The present invention relates to a solvent-free epoxy paint used to repair cracks of long transportation pipeline and preparation method thereof, which comprises a solution A and solution B, wherein the solution A is made by bisphenol F epoxy resins, polycarboxylic acids solution containing amine derivatives, acrylic ester co-polymer, polysiloxane solution, polyether siloxane copolymer, ethyl urethane oligopolymer solution, black carbon, barium sulfate, mica powder, silica flour, aerosol, silicon carbide and chromium hemitrioxide green; the solution B is made by confecting polyamide wax and modified alicyclic amine. Mix the solution A and solution B to solidify paint film when using. The invention is provided with good constructability and storage stability, and the paint film has good corrosion resistance, quick curing velocity, and can be used to repair cracks of long transportation pipeline; the paint has good racking strength with thermal contraction strap after dry, and has favorable corrosion resistance.

Description

technical field [0001] The invention relates to a solvent-free epoxy coating for jointing of long-distance pipelines, the coating of which has excellent corrosion resistance and good adhesion to heat shrinkable tape after hard drying, and a manufacturing method. technical background [0002] At present, the structure of primer + heat-shrinkable tape is mostly used for pipe joint joints. The main function of the primer is to improve the resistance of the heat-shrinkable tape to cathodic disbonding, and its anti-corrosion function is not outstanding; The quality of baked bonding is difficult to guarantee, and the result is that once the shrinkage tape leaks into the water, the steel pipe has no barrier. Moreover, the epoxy primer currently used requires coating the heat shrinkable tape in the dry state of the primer, mainly because the current epoxy primer is based on the reaction activity in the dry state and the hot melt adhesive in the molten state. reaction to achieve the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D7/12
Inventor 韩文礼解蓓蓓徐忠苹邵怀启张其滨
Owner BC P INC CHINA NAT PETROLEUM CORP
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