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A kind of sealant for repairing deep water pipeline and preparation method thereof

A deep-water pipeline and sealant technology, applied in the field of sealants, can solve the problems of unfavorable adhesive materials, being washed away by water flow, short life, etc., and achieve the effects of easy industrial production, simple and convenient use, and high bonding strength

Inactive Publication Date: 2017-04-12
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the construction process of using sealant, the bonding surface is required to be dry, clean and pollution-free, but for the bonding and sealing repair of various underwater structures such as underwater pipelines, oil and gas pipelines, etc., underwater bonding is required. When there is not only water but also sediment on the surface of the bonded material, it will have an adverse effect on the bonded material. In addition, the underwater construction has strict requirements on the density and water solubility of the solidified material in water. The density is too small. It will be washed away by the current during construction; if the density is too high, it will sink to the bottom of the water
In the actual use process, although some products can be cured underwater, the curing effect is not good, it is difficult to form a continuous film on the surface of the material, the adhesion is poor, and the service life is short.
In summary, the current sealant has poor curing effect and poor elasticity under harsh conditions, and it is difficult to meet the requirements for repairing the rupture of the outer waterproof layer of marine deep-water pipelines.

Method used

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  • A kind of sealant for repairing deep water pipeline and preparation method thereof
  • A kind of sealant for repairing deep water pipeline and preparation method thereof
  • A kind of sealant for repairing deep water pipeline and preparation method thereof

Examples

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preparation example Construction

[0019] A second aspect of the present invention provides a method for preparing a sealant for repairing deep-water pipelines, the steps comprising:

[0020] (1) Preparation of component A: Weigh 80-95 parts of elastic epoxy resin, 5-10 parts of toughening agent, and stir evenly; then add 8-15 parts of rheology modifier, 0.1-0.2 parts of Stir the defoamer for 1-2h.

[0021] (2) Preparation of component B: Weigh 50-90 parts of hydrophobic curing agent and 0.2-0.8 parts of accelerator, and stir evenly.

[0022] (3) Mix component A and component B evenly so that component A accounts for 50-72% by mass of the sealant, and component B accounts for 28-50% by mass of the sealant. get the product.

[0023] Preferably, said removing air bubbles is placing under vacuum for 30 minutes to remove air bubbles.

Embodiment 1

[0026] This embodiment provides a sealant for repairing deep water pipelines, the sealant is composed of component A and component B, the mass ratio of component A to component B is 1:0.55, wherein component A is made of MS-1086T Composed of elastic epoxy resin, polysulfide rubber, nano-alumina, and E8 defoamer, the weight ratio is: 85 parts of MS-1086T elastic epoxy resin, 5 parts of polysulfide rubber, 10 parts of nano-alumina, E8 defoaming agent 0.1 part of agent; B component is made up of 810 curing agent, JA-IS underwater epoxy resin curing agent, 2,4,6-three (dimethylaminomethyl) phenol, and its weight ratio is: 810 curing agent 20 Parts, 35 parts of JA-IS underwater epoxy resin curing agent, 0.2 part of 2,4,6-tris(dimethylaminomethyl)phenol.

[0027] The sealant is prepared as follows, and the specific steps are:

[0028] (1) Preparation of component A: Weigh 85 parts of MS-1086T elastic epoxy resin, 5 parts of polysulfide rubber, and stir evenly; then add 10 parts of ...

Embodiment 2

[0034] This embodiment provides a sealant for repairing deep water pipelines, the sealant is composed of component A and component B, the mass ratio of component A to component B is 1:0.6, wherein component A is made of MS-1086T Elastic epoxy resin, epoxy nitrile rubber, nano silicon dioxide, E8 defoamer, the weight ratio is: MS-1086T elastic epoxy resin 80 parts, epoxy nitrile rubber 5 parts, nano silicon dioxide 15 parts, 0.15 parts of E8 defoamer; B component is made up of 810 curing agent, JA-IS damp underwater epoxy resin curing agent, 2,4,6-three (dimethylaminomethyl) phenol, and its weight formula The ratio is: 30 parts of 810 curing agent, 30 parts of JA-IS wet underwater epoxy resin curing agent, and 0.5 parts of 2,4,6-tris(dimethylaminomethyl)phenol.

[0035] The sealant is prepared as follows, and the specific steps are:

[0036] (1) Preparation of component A: Weigh 80 parts of MS-1086T elastic epoxy resin, 5 parts of end-epoxy nitrile rubber, stir well; then add ...

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Abstract

The invention provides sealant for repairing a deepwater pipeline and a preparation method for the sealant. The sealant comprises a component A and a component B, wherein the component A accounts for 50-72 percent (in percentage by mass) of the sealant, and the component B accounts for 28-50 percent of the sealant; the component A consists of the following components in parts by weight: 85-95 parts of elastic epoxy resin, 5-10 parts of a flexibilizer, 8-15 parts of a rheology modifier and 0.1-0.2 part of a de-foaming agent; the component B consists of the following components in parts by weight: 50-90 parts of a hydrophobic curing agent, and 0.2-0.8 part of an accelerant. The sealant can be completely cured in water within 1-12 hours, is good in elasticity, high in bonding strength, free of phenomena such as dissolution, flotation, curliness and the like, capable of standing impact of sea waves and has good effect in bonding repair of outer skin damages of a marine deepwater pipeline; the preparation process is simple and liable to industrial production.

Description

technical field [0001] The invention relates to the technical field of sealants, in particular to a sealant for repairing deep-water pipelines and a preparation method thereof. Background technique [0002] For some oil and gas pipelines in deep water, the protective layer on the surface of the pipeline will be damaged due to the construction process or other reasons. In order to ensure that it is not prepared for seawater corrosion, it is necessary to repair the damaged part by bonding. Especially for deep-water flexible risers, the pipe diameter can change with the change of oil pressure, so the requirements for the sealant are higher, and the sealant needs to be high-pressure and have certain elasticity. 1000-1500m, if the flexible riser is damaged, the curing conditions are harsh, and the underwater robot ROV needs to be used for operation. The process must be simple, otherwise it is likely to fail. However, domestic research on this kind of sealant has basically not be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J163/00C09J11/08C09J11/04
Inventor 罗跃李凡苏高申张敬安余国核吴义涛胡攀刘磊谭良柏
Owner YANGTZE UNIVERSITY