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Anticorrosive viscoelastic body rubber belt and preparation method thereof

A viscoelastic body and adhesive tape technology, applied in chemical instruments and methods, adhesives, film/sheet adhesives, etc., can solve the problems of anti-corrosion failure of heat-shrinkable tapes, inconvenient on-site operation, poor bonding of hot-melt adhesives, etc. problems, to achieve the effect of eliminating water intrusion and microbial corrosion, the technical level of construction personnel is small, and the treatment requirements are low

Active Publication Date: 2013-02-06
CYG CHANGTONG NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this kind of heat-shrinkable tape, the shrinkage of the heat-shrinkable tape during construction is done by manual baking and heating. In the actual application process, there are often construction reasons such as artificial baking unevenness that cause poor bonding of hot-melt adhesives, and this defect will occur with time. Expands over time, resulting in tape corrosion failure
The anti-corrosion method of cold-wound tape used for special-shaped pipe fittings such as elbows, tees, and insulating flanges requires strict derusting treatment and primer coating on the anti-corrosion parts. The on-site operation is inconvenient and the anti-corrosion effect is not good.

Method used

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  • Anticorrosive viscoelastic body rubber belt and preparation method thereof
  • Anticorrosive viscoelastic body rubber belt and preparation method thereof
  • Anticorrosive viscoelastic body rubber belt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Accurately weigh the raw materials for preparing viscoelastic glue according to the following formula:

[0048] Butyl rubber (IIR268) 5kg, high molecular weight polyisobutylene (PIB B80) 8kg, medium molecular weight polyisobutylene (PIB B12) 30kg, low molecular weight polyisobutylene (PIB 2300) 15kg, activated calcium carbonate 40kg, antioxidant (1010) 0.5 kg, anti-aging agent (264) 0.5kg, colorant (phthalocyanine green) 1kg.

[0049] like figure 2 As shown, the above-mentioned weighed raw materials for preparing the viscoelastic glue are put into the kneader 2, and kneaded at 130±15° C. for 1 to 1.5 hours to make the glue. The cement is transported to the reactor 3 through a single-screw feeder for secondary mixing. The mixing temperature in the reactor is 110±10°C, and the mixing time is 0.5 to 1 hour. The cement mixed in the reaction kettle 3 is transported to the extruder 4 by a gear pump for mixing. The extruder 4 is equipped with a flat slit die forming die 5 ....

Embodiment 2

[0056] Adopt the method for embodiment 1, change the formula of elastic viscose glue as follows:

[0057] Butyl rubber (IIR268) 5kg, high molecular weight polyisobutylene (PIB B80) 5kg, medium molecular weight polyisobutylene (PIB B12) 35kg, low molecular weight polyisobutylene (PIB2300) 15kg, activated calcium carbonate 38kg, antioxidant (1010) 0.5kg , anti-aging agent (268) 0.5kg, colorant (phthalocyanine green) 1kg.

[0058] The reinforcement net 131 adopts a 0.1mm thick polyethylene net, the protective film 11 adopts a 0.05mm thick medium density polyethylene film, the release film 15 adopts a 0.075 thick PET release film, the first viscoelastic adhesive layer 12, the reinforcement net The total thickness of the layer 13 and the second viscoelastic adhesive layer 14 is 2.0-2.2mm.

[0059] The shear strength of the viscoelastic tape at 23±2°C is 0.035MPa, the shear strength at 50±2°C is 0.015MPa, and the peel strength at 23±2°C is 5N / cm. The peeling state is cohesive failu...

Embodiment 3

[0061] Adopt the method for embodiment 1, change the formula of elastic viscose glue as follows:

[0062] Butyl rubber (IIR268) 3kg, high molecular weight polyisobutylene (PIB B80) 10kg, medium molecular weight polyisobutylene (PIB B12) 30kg, low molecular weight polyisobutylene (PIB2300) 15kg, activated calcium carbonate 40kg, antioxidant (1010) 0.5kg , anti-aging agent (264) 0.5kg, colorant (phthalocyanine green) 1kg.

[0063] The reinforcement net 131 adopts a 0.1mm thick polyethylene net, the protective film 11 adopts a 0.05mm thick medium density polyethylene film, the release film 15 adopts a 0.075 thick PET release film, the first viscoelastic adhesive layer 12, the reinforcement net The total thickness of the layer 13 and the second viscoelastic adhesive layer 14 is 2.0-2.2mm.

[0064] The shear strength of the viscoelastic tape at 23±2°C was 0.040MPa, the shear strength at 50±2°C was 0.018MPa, the peel strength at 23±2°C was 5N / cm, and the peeling state was cohesive ...

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Abstract

The invention relates to an anticorrosive viscoelastic body rubber belt, which comprises a protective film layer, a first viscoelastic body rubber belt, an enhanced network layer, a second viscoelastic body rubber layer and a release film layer arranged in turn, wherein the protective film layer is bonded with the first viscoelastic body rubber layer, the first viscoelastic body rubber layer is bonded with the enhanced network layer, and the enhanced network layer is bonded with the second viscoelastic body rubber layer to compound a whole body; and the release film layer is adhered to the second viscoelastic body rubber layer, wherein the viscoelastic body rubber is prepared from the following raw materials in percentage by weight: 3 to 10 percent of butyl rubber, 5 to 10 percent of high molecular weight polyisobutylene, 25 to 35 percent of medium molecular weight polyisobutylene, 10 to 15 percent of low molecular weight polyisobutylene, 30 to 45 percent of inorganic enhanced powder, 0.5 to 1.0 percent of antioxidant, 0.5 to 1.0 percent of anti-aging agent, and 0 to 1.0 percent of colorant. The viscoelastic body rubber belt has a self-healing function, is not brushed with a primer when used, and can be directly used for corrosion protection of irregular components. The invention also relates to a preparation method of the anticorrosive viscoelastic body rubber belt.

Description

technical field [0001] The invention relates to a material for anticorrosion and repair of oil and gas buried steel pipeline joints and anticorrosion materials for special-shaped pipe fittings such as steel elbows, elbows, tees and insulating flanges, especially a material containing viscoelastic Layered structure anti-corrosion tape of the body layer. The invention also relates to a method for preparing the viscoelastic adhesive tape. Background technique [0002] At present, radiation cross-linked polyethylene heat-shrinkable tape is widely used for anti-corrosion and repair of oil and gas buried steel pipeline joints, and cold-wound tape is generally used for anti-corrosion of special-shaped pipe fittings such as elbows, tees and insulating flanges. The heat shrinkable tape is composed of radiation cross-linked polyethylene base material and hot melt adhesive. The radiation cross-linked polyethylene base material shrinks under heating conditions and wraps the protected s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/02C09J123/20C09J123/22C09J11/04B32B15/08B32B15/18B32B3/12
Inventor 徐焕辉孟平福陈君易杜
Owner CYG CHANGTONG NEW MATERIAL
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