Metallocene polypropylene modified material for corrosion-inhibiting coating of steel pipe and preparation method and application thereof

Abstract

The invention discloses a metallocene polypropylene modified material for a corrosion-inhibiting coating of a steel pipe and a preparation method and application thereof. A formula of the material comprises 65 to 95 weight percent of metallocene polypropylene, 3 to 30 weight percent of co-polypropylene, 0.01 to 4 weight percent of thermal oxygen stabilizer, 0.03 to 3 weight percent of ultravioletabsorbent and light stabilizer, 0.02 to 5 weight percent of functional additive, 0.01 to 3 weight percent of inorganic nanometer reinforced material, and 0 to 5 weight percent of black color batch, and the material is prepared by adopting a double screw extruder to carry out plasticizing blending technology for extrusion and pelletization. The metallocene polypropylene modified material has wide casting and coating processing range, has strong adaptability to bottom glue of hot melt adhesives, has outstanding ultraviolet light aging resistance and thermal-oxidative aging resistance, and has excellent shock resistance and surface scratch resistance as well as extremely high environmental stress cracking resistance. The material can be suitable for terrestrial pipelines at continuous working temperature high up to 110 DEG C, and is also suitable for offshore pipelines at certain special continuous working temperature high up to 140 DEG C at the same time.

Description

technical field

[0001] The invention relates to the technical field of anti-corrosion coatings for pipelines, in particular to a preparation method, characteristics and application of a metallocene polypropylene modified material for anti-corrosion coatings of steel pipes. Background technique

[0002] After years of development, evolution and survival of the fittest, the pipeline anti-corrosion coating used 3PE anti-corrosion coating for most large-scale domestic pipeline projects in the mid-1990s. Due to the construction of the Sudan pipeline project in China in recent years, people gradually recognized the 3PP anti-corrosion coating. Floor. The processing properties of PP and PE are similar, and the 2 / 3PP coating can be completely produced by using the 2 / 3PE operation line, without the need to build a special 2 / 3PP operation line. Compared with 2 / 3PE coating, the more prominent advantage of 2 / 3PP coating is that the heat resistance level and hardness are relatively high,...

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