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

A metallocene polypropylene and anti-corrosion coating technology, applied in anti-corrosion coatings, coatings, etc., can solve the problems of using nano-reinforced materials and other problems that are not mentioned, and achieve outstanding UV aging resistance and thermal resistance. Oxygen aging performance, excellent impact resistance, strong adaptability

Active Publication Date: 2011-06-15
GUANGZHOU LUSHAN NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned patents did not mention the use of metallocene polypropylene as the matrix resin, nor the use of nano-reinforced materials, nor the application of anti-corrosion coatings on 2PP steel pipes, nor did they mention that the material was passed through flow. The process of extending, winding coating or direct extrusion coating on the outer layer of steel pipe

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Formulation: 90wt% metallocene polypropylene (mPP), 5.3wt% block copolymerized polypropylene, 0.3wt% metal soap type thermal oxygen stabilizer, 0.5wt% benzophenone type UV absorber and hindered methyl piperidine Light stabilizer, 0.3wt% titanate coupling agent and stearic acid amide dispersant, 0.6wt% nano-CaCO 3 , 3wt% black mother.

[0027] The above components are extruded and granulated by a twin-screw extruder to implement a plasticizing and blending process, the extruder length-diameter ratio is L / D=40:1, and the processing temperature is 160-210°C.

Embodiment 2

[0029] Formulation: 80wt% metallocene polypropylene (mPP), 17.3wt% block copolymerized polypropylene, 0.5wt% metal soap type thermal oxygen stabilizer, 0.7wt% chlorinated benzotriazole type UV absorber and hindered phosphorous acid Ester light stabilizer, 0.5wt% polypropylene dispersant, 1.0wt% nano-talc.

[0030] The above components are extruded and granulated by a twin-screw extruder to implement a plasticizing and blending process, the extruder length-diameter ratio is L / D=40:1, and the processing temperature is 160-210°C.

Embodiment 3

[0032] Formulation: 75wt% metallocene polypropylene (mPP), 21.4wt% block copolymerized polypropylene and random copolymer polypropylene blend, 0.6wt% benzofuranone type thermal oxygen stabilizer, 0.8wt% benzophenone type UV light Absorber and hindered methyl piperidine light stabilizer, 0.7wt% silane coupling agent, 1.3wt% nano-TiO 2 .

[0033] The above components are extruded and granulated by a twin-screw extruder to implement a plasticizing and blending process, the extruder length-diameter ratio is L / D=40:1, and the processing temperature is 160-210°C.

[0034] The properties of the products of Examples 1-3 are shown in Table 1.

[0035] Table 1

[0036]

[0037]

[0038]It can be seen from the table that the products of Examples 1-3 all have outstanding thermal oxygen resistance, photoaging properties and excellent comprehensive properties, which can greatly extend the service life of anti-corrosion steel pipes and broaden the service environment of anti-corrosio...

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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,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/14C08K13/02C08K5/098C08K5/1535C08K5/07C08K5/3475C08K3/26C08K3/36C08K3/22C08K9/04B29B9/06C09D5/08C09D123/26F16L58/10
Inventor 范德辉陈占春唐舫成汪加胜
Owner GUANGZHOU LUSHAN NEW MATERIALS
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