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Viscoelastic fluid adhesive tape and preparation method thereof

A viscoelastic and elastomeric technology, applied in the field of viscoelastic adhesive tape preparation, can solve the problems of poor cathodic protection treatment, decreased overall sealing performance, and inconvenient construction, etc., and achieves good anti-corrosion effect, strong overall sealing performance, Good bonding effect

Active Publication Date: 2012-10-17
江苏达胜热缩防护用品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adhesive of the two-layer structure polyethylene anti-corrosion layer has the risk of failure. For the pipeline with the temperature of the conveying medium higher than 80 ℃, the cathodic protection treatment is not good, and there is a risk of stress cracking.
Although the three-layer structure polyethylene anti-corrosion layer can give full play to their respective advantages, its cost is high, the process is complicated, and the construction is not convenient enough.
Whether it is a two-layer structure polyethylene anti-corrosion layer or a three-layer structure polyethylene anti-corrosion layer, its construction requires baking operations, which is not convenient for construction, and if the baking is uneven, it is easy to cause poor local bonding and overall sealing performance.

Method used

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  • Viscoelastic fluid adhesive tape and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0024] A viscoelastic adhesive tape, which is composed of a polyethylene film and a viscoelastic material distributed on the polyethylene film, a layer of polypropylene mesh is arranged between the film and the viscoelastic material, and the adhesive The elastomer material is mainly prepared from 12 parts of butyl rubber, 30 parts of polyisobutylene with a weight average molecular weight of 20000-60000, 50 parts of light calcium carbonate and 0.2 part of pigment, in parts by weight.

[0025] The preparation method of viscoelastic adhesive tape of the present invention is:

[0026] Step 1, firstly add 12 parts of the butyl rubber into the kneader, then add 30 parts of polyisobutylene with a weight average molecular weight of 20,000 to 60,000, 50 parts of light calcium carbonate and 0.2 parts of pigment into the kneader, Kneading at a temperature of 150°C for 60 minutes to prepare a viscoelastic material;

[0027] Step 2, adding the uniformly kneaded viscoelastic material into ...

Embodiment 2～6

[0030] A viscoelastic adhesive tape, wherein the raw material components and contents of the viscoelastic material are shown in Table 1, the kneading temperature and kneading time of the viscoelastic material are shown in Table 2, and the specific preparation method is the same as in Example 1.

[0031] Table 1. Each component and its consumption in Examples 2 to 6, in parts by weight

[0032]

[0033] Table 2 Kneading temperature and kneading time of viscoelastic materials in Examples 2-6

[0034] Example

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Abstract

The invention provides a viscoelastic fluid adhesive tape which consists of a film and viscoelastic fluid materials distributed on the film. The invention is characterized that the viscoelastic fluid adhesive tape is mainly prepared from the following components in parts by weight: 5-20 parts of rubber, 20-35 parts of polyisobutene with a weight-average molecular weight of 20,000-60,000 and 40-60parts of powder filler. The invention also provides a preparation method of the viscoelastic fluid adhesive tape. The viscoelastic fluid adhesive tape is used for the corrosion prevention of steel pipelines of petroleum and natural gas and has good corrosion prevention effect, good sealing property and low temperature performance and wide application prospect.

Description

technical field [0001] The invention relates to a viscoelastic adhesive tape used for anticorrosion of steel pipelines, and also relates to a preparation method of the viscoelastic adhesive tape. Background technique [0002] Buried pipelines are an important channel for energy supply in the petroleum industry, and steel pipelines are one of the main pipes used for transportation. Due to the effect of the soil environment, buried steel pipelines often undergo various corrosions and cause pipeline leakage. Improving pipeline anti-corrosion technology and prolonging the service life of pipelines is one of the global technical problems today, and has become a hot spot of widespread concern in science and technology and engineering design. A good anti-corrosion layer is the first line of defense for buried steel pipelines against corrosion. It can effectively isolate the steel pipe from the surrounding medium, and plays a decisive role in slowing down the corrosion rate of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/02C09J7/04C09J123/20C09J123/22C09J153/02C09J9/00
Inventor 张志强杨军伟
Owner 江苏达胜热缩防护用品有限公司