Propenyl hot-melt adhesive composition and preparation method thereof

Abstract

The invention provides a propenyl hot-melt adhesive composition, which is characterized by comprising the following components: (A) polypropylene; (B) polyolefin elastomer; (C) polar monomer; and (D) grafting initiator; and optionally comprises (E) other auxiliary agents. The invention also provides a preparation method of the propenyl hot-melt adhesive composition.

Description

Technical field [0001] The invention belongs to the field of polymer adhesives. Specifically, the invention relates to a propylene-based hot melt adhesive composition and a preparation method thereof. Background technique [0002] Steel-plastic (including aluminum-plastic composite) composite pipe is a new type of pipeline material developed in recent years. It uses seamless steel pipes, welded steel pipes, and galvanized steel pipes as the matrix. It is combined with various types of plastics (such as epoxy resin, polyethylene Etc.) by compounding. With its characteristics of resistance to medium and high pressure, high structural strength, and long service life, it is widely used in various fields such as municipal drainage, mining, chemical industry, and oil and gas transportation. [0003] In the steel-plastic composite structure, the non-polar plastic layer and the metal layer are organically bonded through the hot melt adhesive as the intermediate layer. [0004] In the prior...

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Problems solved by technology

[0006] However, due to the different thermal expansion rates of the steel and plastic materials, the delamination of the steel and plastic interfaces limits the performance and development of steel-plastic composite pipes.

The hot melt adhesive mentioned above cannot maintain the combination of the steel-plastic interface in a large temperature range

[0007] At present, the means to solve the delamination problem is to adopt a special structure. For example, patents CN200810207973 and CN201210111828 respectively report a double-walled corrugated pipe with a hollow structure in which the polymer inner layer does not contact the steel layer and a wound pipe with a hollow interlayer. When the plastic layer cannot withstand the internal pressure of the pipe, the inside of the steel-plastic composite pipe is prone to deformation and depression, which will bring hidden dangers to the use of the steel-plastic composite pipe

Patents CN201110166413, CN200510021225, and CN200910225151 disclose steel-plastic composite pipes with special steel skeleton structures (such as repeatedly wound steel wire structures, hole mesh structures, and trapezoidal steel strips). , Delamination of the plastic interface has a certain limiting effect, but at the same time increases the difficulty and cost of processing

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