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Preparation method of special pre-curing adhesive for SMC (Sheet Molding Compound)

A preparation method and adhesive technology, which are used in non-polymeric organic compound adhesives and adhesives, etc., can solve the problems of low overall reinforcement strength of the repair layer, large deviation of adhesive fluidity, and poor oil and gas pipeline effect. Efficient SMC repair, improve the overall reinforcement strength, reduce the effect of repair failure rate

Pending Publication Date: 2022-04-08
PIPECHINA SOUTH CHINA CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this application is to provide a method for preparing a special pre-cured adhesive for SMC, which is used to solve the problem of using adhesives in other fields such as automobiles and home decoration to repair oil and gas pipelines in the prior art, because the adhesive has large fluidity deviation and poor weather resistance. and other problems, leading to technical problems such as poor repair effect of oil and gas pipelines and low overall reinforcement strength of the repair layer

Method used

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  • Preparation method of special pre-curing adhesive for SMC (Sheet Molding Compound)

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Experimental program
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Effect test

Embodiment 1

[0028] Such as figure 1As shown, the present invention discloses a method for preparing a special pre-cured adhesive for SMC. The method for preparing a special pre-cured adhesive for SMC is used to prepare a special pre-cured adhesive for bonding SMC to defective parts of oil and gas pipelines, wherein the The pre-cured adhesive preparation method comprises:

[0029] Step S100: blending epoxy resin with 3,4-epoxycyclohexyl methacrylate and acrylate, and stirring evenly to prepare a composite resin;

[0030] Specifically, when repairing defective parts of oil and gas pipelines, existing adhesives on the market are often used to paste the composite material sheet structure SMC on the corresponding defective parts. Among them, commonly used adhesives include thermosetting adhesives, thermoplastic adhesives and multi-component adhesives. Adhesives etc. Among them, thermosetting adhesives include epoxy resins, polyurethanes, silicones, polyimides, etc.; thermoplastic adhesives i...

Embodiment 2

[0054] In order to more clearly explain the technical scheme of a preparation method of a special pre-cured adhesive for SMC, the embodiment of the present application provides a detailed preparation process of a special pre-cured adhesive for SMC using the preparation method of a special pre-cured adhesive for SMC, specifically as follows:

[0055] Specifically, in order to solve the repair of oil and gas pipelines using adhesives in other fields such as automobiles and home decoration in the prior art, due to the problems of large fluidity deviation and poor weather resistance of the adhesives, the repair effect of oil and gas pipelines is poor, and the repair The technical problem of low overall reinforcement strength of the layer.

[0056] First, the epoxy resin, 3,4-epoxycyclohexyl methacrylate and acrylate are blended and stirred at a mass ratio of 100:40-55:35-55, the stirring rate is not greater than 200rad / min, and the mixture is completely stirred After being unifor...

Embodiment 3

[0061] In order to more clearly explain the technical scheme of a preparation method of a special pre-cured adhesive for SMC, the application provides a special pre-cured adhesive for SMC prepared by using the preparation method of a special pre-cured adhesive for SMC to carry out oil and gas pipelines. The construction method and detailed process of defect repair are as follows:

[0062] The on-site simulation experiment of SMC special pre-cured adhesive was carried out in a certain experimental site of a pipeline company. In this simulation, the target pipeline to be repaired is an OD1016mm×17.6mm, X70 pipeline, the design pressure is 10MPa, the design strength coefficient is 0.72, and there is a 30% wall thickness depth (5.3mm depth) of unfused pipe butt girth welds. defect. In this simulation experiment, the defect of the target pipeline was repaired using the SMC special pre-cured adhesive. The specific construction process includes:

[0063] Step 1: Mix 150g of epoxy r...

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Abstract

The invention discloses a preparation method of a special pre-curing adhesive for SMC (Sheet Molding Compound), the preparation method of the special pre-curing adhesive for SMC is used for preparing the special pre-curing adhesive for adhering SMC to a defect part of an oil and gas pipeline, and the preparation method of the pre-curing adhesive comprises the following steps: mixing epoxy resin with 3, 3 '-difluoro-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4-trimethyl-1, 3, 4- The preparation method comprises the following steps: blending 2, 4-epoxy cyclohexyl methacrylate and acrylate, and uniformly stirring to prepare compound resin; acrylic monomers and auxiliaries are added into the compound resin, and modified compound resin is prepared after high-temperature, stirring and ultraviolet light treatment; the modified compound resin and a compound curing agent are blended and stirred, and the special pre-curing adhesive for SMC is prepared after uniform stirring and standing, and is used for repairing long-distance oil and gas pipelines. The technical problems that in the prior art, adhesives in other fields are used for repairing the oil and gas conveying pipeline, the repairing effect of the oil and gas conveying pipeline is poor due to the performance of the adhesives, and the overall reinforcing strength of a repairing layer is low are solved.

Description

technical field [0001] The invention relates to the technical field of repairing oil and gas pipelines, in particular to a method for preparing a special pre-cured adhesive for SMC. Background technique [0002] Oil and gas pipeline refers to a pipeline system composed of oil or gas pipelines and their accessories, which are used to complete the tasks of oil loading, unloading and transportation. Oil and gas pipelines are generally steel pipes. Due to the harsh application environment of oil and gas pipelines, problems such as corrosion or defects often occur in the pipelines. Using pipeline defect repair technology to carry out targeted repairs on the location of the pipeline in question can reduce pipeline maintenance costs and increase pipeline service time, achieving the technical effect of reducing pipeline costs and improving the effective utilization rate of pipelines. Among them, pipeline defect repair is divided into welding repair technology and non-welding repair...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/02C09J4/06
Inventor 郭旭蔡越杨晗蔡德宇赵建涛易斐宁刘阳石蕾黄安东邓纪华
Owner PIPECHINA SOUTH CHINA CO
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