Polyethylene glue nucleation melting-boosting adhesive special for oil and gas pipelines

Abstract

The invention discloses a polyethylene glue nucleation melting-boosting adhesive special for oil and gas pipelines. The adhesive comprises the following raw materials in percentage by mass: 60 to 80 percent of polyethylene, 5 to 20 percent of reaction monomer, 0.1 to 1 percent of initiator, 0.5 to 5 percent of nucleating agent, 0.1 to 2 percent of anti-oxidant, and 5 to 25 percent of carbon black,wherein the reaction monomer may be one or more of maleic anhydride, dibutyl maleate or derivatives of acrylamide; the initiator may be one of dibenzoyl peroxide, dicumyl peroxide, ditert-butyl peroxide, tert-butyl hydroperoxide or cumene hydroperoxide; the nucleating agent is selected from benzyl sorbitol derivative series nucleating agent or phosphate salt derivative series nucleating agent; and the anti-oxidant is the main anti-oxidant 1010 and the auxiliary anti-oxidant 618. The adhesive has the advantages of excellent mechanical property, wear-resisting property and thermal property andwide application.

Description

【Technical field】 [0001] The invention relates to the field of adhesives, in particular to a nucleating and melting adhesive of polyethylene glue for oil and gas pipelines. 【Background technique】 [0002] The research on multi-layer anti-corrosion materials and processes for external anti-corrosion of metal pipes can be traced back to the 1980s. In 1980, Samour et al in their patent USP 4,213,486 clarified a multi-layer corrosion protection process for the outer surface of metal pipes. According to its patent, it can be found that the technical feature at that time is a two-layer anti-corrosion structure. The inner layer is the sintered epoxy powder resin hot-applied on the outer surface of the metal pipe, and the outer layer is the polyolefin layer that is bonded / wrapped on the surface of the sintered epoxy powder resin. Oxygen powder resin provides the first anti-corrosion function of the polyethylene tape, and the other part is the adhesive that provides adhesion betwee...

AI Technical Summary

Problems solved by technology

Although the patent simplifies the preparation process and saves the manufacturing cost, the anti-corrosion function of polyethylene in the complex corrosion of buried pipelines is still insufficient

[0005] In addition, Chinese Patent Application No. 200610122005.7 discloses a composite wrapping tape for anticorrosion of the outer layer of steel pipes and its production method and usage method. Derusting heating and spraying fusion-bonded epoxy powder on the steel straight pipe, forming a uniform anti-corrosion layer after cooling; this process technology configuration has good anti-aging, anti-corrosion, durability, weather resistance, peeling resistance and other aspects. However, this kind of anti-corrosion structure is not easy to operate in the pipeline anti-corrosion production line. For example, when coating, the polyethylene tape needs to be stretched and rolled, because the polyethylene coated in this way will not It has good crystallization properties, so its mechanical strength and tensile properties (mainly the stretching ratio) will also be affected, which may cause the polyethylene tape to be deformed or broken during winding and affect the anti-corrosion performance. During the pipeline construction process It is also easy to cause surface damage; and its processing technology is also relatively cumbersome and easy to bring hidden dangers to safe and efficient production

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