Overpressure-resistant polypropylene thermal insulation material, preparation method and applications thereof

Abstract

The invention discloses an overpressure-resistant polypropylene thermal insulation material, which comprises the following components: 50 to 70 wt% of copolymerized polypropylene, 15 to 30 wt% of hollow glass bead, 5 to 10 wt% of gas-phase silicon dioxide, and 5.5 to 21 wt% of auxiliary agent. The common polypropylene resin is taken as the matrix, and then hollow glass beads and gas-phase silicon dioxide are filled into the matrix to prepare the overpressure-resistant polypropylene thermal insulation material, wherein the porous structure of gas-phase silicon dioxide can improve the filling efficiency of hollow glass beads. The heat conductivity of the provided material is lower and the overpressure-resistant performance is stronger, compared with those of a thermal insulation material filled with a single component namely hollow glass beads and a conventional polyurethane material. When the prepared overpressure-resistant polypropylene thermal insulation material is wrapped on an oil / gas pipeline by a single screw extruder, the wrapped layer number can be reduced, and thus the construction difficulty and cost are both reduced.

Description

technical field [0001] The invention relates to the technical field of polymer thermal insulation materials for deep sea, in particular to a pressure-resistant polypropylene thermal insulation material and its preparation method and application. Background technique [0002] With the increasing scope of offshore oil and gas exploitation and the depletion of onshore and shallow-sea oil and gas resources, deep-sea oil and gas development has become the focus and frontier of the oil industry. The concept of "deep sea" is constantly changing with the development of the times, and it is also different in different countries. According to internationally recognized standards, the water depth is less than 300 meters as shallow water, more than 300 meters as deep water, and more than 1500 meters as ultra-deep water. At present, there are also a few countries that limit water to 500 meters, and those exceeding 1,500 meters are called ultra-deep water. For the transportation of crud...

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Problems solved by technology

Both the compressive strength and thermal conductivity of the insulation material prepared by this method can meet the requirements of deep-sea oil pipelines, but the preparation method is too complicated and not suitable for large-scale industrial production

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