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Preparation process of sealing glue for petroleum pipeline capping

A technology of oil pipeline and preparation process, applied in the direction of adhesive, adhesive type, polyurea/polyurethane adhesive, etc., can solve the problems of easy aging, easy to be extruded, inconvenient to use, etc. Excellent effect

Inactive Publication Date: 2018-03-13
牟绍林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The use of sealing grease as the sealing material for petroleum pipelines has the following disadvantages: 1) The sealing grease is solvent-based, and it is easy to shrink due to volatilization and cause cracks, resulting in pipeline leakage; 2) The viscosity is high, so it needs to be applied in large quantities when using On oil pipelines, it is extremely easy to be squeezed out during sealing. Therefore, under high temperature and high pressure, not only the sealing effect on the oil pipeline cannot be achieved, but also solidification is formed. The solidification is a heavy metal containing lead, so it is not only very Easy to clog pipes
The use of polytetrafluoroethylene tape as the oil pipeline sealing material has the following disadvantages: 1) It is inconvenient to use because it must be wound in a certain direction; 2) The angle cannot be adjusted according to people's wishes during use; 3. ), easy to age, after aging, it shrinks and forms fragments, which leads to the generation of gaps, and the formed fragments enter the pipeline and cause blockage, resulting in pipeline leakage
[0005] The two existing sealing methods for oil pipelines are not suitable for oil pipeline heads, and there are problems such as poor sealing effect and low corrosion resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation process of sealant for oil pipeline head, including:

[0026] Preparation of component A: Add 6305 polyether polyol into the container, heat to 110-120°C, then add 2,6-di-tert-butyl-α-dimethylamino-p-cresol, mix well and cool to room temperature. Then add 1,6-hexamethylene diisocyanate, stir and react at room temperature for 1-2 hours, then raise the temperature to 80-90°C, keep the reaction for more than 30 minutes, cool down and discharge;

[0027] Preparation of component B: firstly mix talc powder, mica powder and carbon black evenly and make filler for later use; mix polyaspartic acid ester, plasticizer and antioxidant 1010 evenly, then add filler and disperse at high speed Mix evenly, then add 2-methylpentamethylenediamine and mix, keep warm at 80-90°C for more than 30min, cool down and discharge;

[0028] Component A: 50-70 parts of 1,6-hexamethylene diisocyanate; 20-30 parts of 6305 polyether polyol; 1-2 parts of 2,6-di-tert-butyl-α-dimethylamin...

Embodiment 2

[0038] The difference between this embodiment and embodiment 1 is that the specific ratio in this embodiment is as follows:

[0039] Component A: 70 parts of 1,6-hexamethylene diisocyanate; 20 parts of 6305 polyether polyol; 1 part of 2,6-di-tert-butyl-α-dimethylamino-p-cresol;

[0040] Component B: 35 parts of polyaspartic acid ester; 40 parts of 2-methylpentamethylenediamine; 12 parts of filler; 2 parts of antioxidant 1010; 4 parts of plasticizer;

[0041] The mass ratio of the A component to the B component is 1:2.8, the filler is talcum powder, mica powder and carbon black, and the ratio of the talc powder, mica powder and carbon black is 1:1:2.

[0042] When used, it can be mixed according to the specific ratio in this embodiment.

[0043] In the present embodiment, the surface drying time of the sealant is 40min, the tensile strength is 34Mpa, the elongation at break is 36%, the tear strength is 96N / mm, and the adhesion to the steel substrate is 10.6Mpa, 750g / 500r The ...

Embodiment 3

[0045] The difference between this embodiment and embodiment 1 is that the specific ratio in this embodiment is as follows:

[0046] Component A: 65 parts of 1,6-hexamethylene diisocyanate; 30 parts of 6305 polyether polyol; 2 parts of 2,6-di-tert-butyl-α-dimethylamino-p-cresol;

[0047] Component B: 40 parts of polyaspartic acid ester; 30 parts of 2-methylpentamethylenediamine; 15 parts of filler; 2 parts of antioxidant 1010; 7 parts of plasticizer;

[0048] The mass ratio of the A component to the B component is 1:2, the filler is talcum powder, mica powder and carbon black, and the ratio of the talc powder, mica powder and carbon black is 3:2:2.

[0049] In the present embodiment, the surface drying time of the sealant is 60min, the tensile strength is 29Mpa, the elongation at break is 32%, the tear strength is 76N / mm, and the adhesion to the steel substrate is 9.8Mpa, 750g / 500r The abrasion resistance is 4.8 mg. After soaking in 10% hydrochloric acid, 10% sodium hydroxid...

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Abstract

The present invention disclosed the use of a sealing gel preparation process for the sealing glue of the oil pipeline, which solves the problem of the sealing methods of the two existing public oil pipelines.The present invention includes the preparation of the A component: adding 6305 polyether polyol to the container, heating to 110-120 ° C, and then adding 2,6‑ ‑ 丁 ‑ α‑ ‑ amino group to coolerBy room temperature, add 1,6‑ 己 二 isocyanate, and the normal temperature stirring reaction for 1‑2 hours, then heated to 80-90 ℃, maintain the response of more than 30 minutes, and cool down.Mixing Yunmu powder and charcoal black are evenly mixed with fillers for later use; stir and mix the polytraphic winter doorsine fat, plasticizer, antioxidant 1010 and mix well, then add the filler to high -speed dispersing and mix well, and then 2‑ methamphetamine pentius twoThe amine is mixed, and the heat is more than 30 minutes at 80-90 ° C.The present invention has the advantages of stretching strength, breakdown rate, tearing intensity, and adhesion of steel substrate.

Description

technical field [0001] The invention relates to a preparation process of a sealant, in particular to a preparation process of a sealant for oil pipeline heads. Background technique [0002] At present, there are two kinds of petroleum pipeline sealing materials publicly available on the market: one is sealing grease, which is produced by a series of processes from complex lithium-based grease, solid powder and additives, and contains heavy metal lead; the other is One is polytetrafluoroethylene tape, which is produced by coating polytetrafluoroethylene on a glass fiber braid. [0003] The use of sealing grease as the sealing material for petroleum pipelines has the following disadvantages: 1) The sealing grease is solvent-based, and it is easy to shrink due to volatilization and cause cracks, resulting in pipeline leakage; 2) The viscosity is high, so it needs to be applied in large quantities when using On oil pipelines, it is extremely easy to be squeezed out during seali...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09J175/02C09J11/04C09J11/06C08G18/73C08G18/48
CPCC09J175/08C08G18/48C08G18/73C08K2201/014C08L2203/18C08L2205/02C09J11/04C09J11/06C09J175/02C08L75/08C08K13/02C08K5/12C08K5/17C08K3/34C08K3/04C08L75/02
Inventor 牟绍林
Owner 牟绍林