Polypropylene powder for 3PP anticorrosion pipeline coating external layers, and preparation method thereof

A polypropylene and pipeline technology, used in anti-corrosion coatings, coatings, powder coatings, etc., can solve problems such as different innovative ideas, and achieve the effect of simplifying production processes, thin anti-corrosion layers, and good dry powder fluidity

Active Publication Date: 2017-06-16
GUANGZHOU LUSHAN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The announcement number is CN105567135A, a polypropylene adhesive powder for anti-corrosion pipelines. This patent introduces PP adhesive powder in 3PP anti-corrosion pipelines. However, the adhesive and the outer polypropylene material have different functions and requirements, so there is an essential difference in material selection. The difference is that the innovative thinking in the process of designing the formula is different, and the development thinking of the adhesive cannot be used to study the outer polypropylene powder

Method used

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  • Polypropylene powder for 3PP anticorrosion pipeline coating external layers, and preparation method thereof
  • Polypropylene powder for 3PP anticorrosion pipeline coating external layers, and preparation method thereof
  • Polypropylene powder for 3PP anticorrosion pipeline coating external layers, and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of polypropylene powder for the outer layer of 3PP anticorrosion pipeline coating, each raw material is as shown in Table 1 by weight percentage:

[0027] Raw material composition weight percent of table 1 embodiment 1

[0028]

[0029] The above-mentioned 3PP anti-corrosion pipeline coating outer layer is prepared with polypropylene powder through the following steps:

[0030] 1) After mixing the raw materials according to the proportion, under the condition of 210°C, extrude and granulate through the twin-screw extruder, the screw speed of the twin-screw extruder is 400rpm, and the aspect ratio of the twin-screw L / D=35:1 , to obtain polypropylene pellets;

[0031] 2) Grinding the polypropylene pellets obtained in step 1) under the condition of liquid nitrogen freezing at a temperature of -50° C. to obtain polypropylene powder.

Embodiment 2

[0033] A kind of polypropylene powder for the outer layer of 3PP anticorrosion pipeline coating, each raw material is as shown in Table 2 by weight percentage:

[0034] Raw material composition weight percent of table 2 embodiment 2

[0035]

[0036] The above-mentioned 3PP anti-corrosion pipeline coating outer layer is prepared with polypropylene powder through the following steps:

[0037] 1) After mixing the raw materials according to the proportion, under the condition of 200°C, extrude and granulate through the twin-screw extruder, the screw speed of the twin-screw extruder is 400rpm, and the aspect ratio of the twin-screw L / D=35:1 , to obtain polypropylene pellets;

[0038] 2) Grinding the polypropylene pellets obtained in step 1) under the condition of liquid nitrogen freezing at -40° C. to obtain polypropylene powder.

Embodiment 3

[0040] A kind of polypropylene powder for the outer layer of 3PP anticorrosion pipeline coating, each raw material is as shown in table 3 by weight percentage:

[0041] Raw material composition weight percent of table 3 embodiment 3

[0042]

[0043] The above-mentioned 3PP anti-corrosion pipeline coating outer layer is prepared with polypropylene powder through the following steps:

[0044] 1) After mixing the raw materials according to the proportion, under the condition of 220℃, extrude and granulate through the twin-screw extruder. , to obtain polypropylene pellets;

[0045] 2) Grinding the polypropylene pellets obtained in step 1) under the condition of liquid nitrogen freezing at a temperature of -60° C. to obtain polypropylene powder.

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Abstract

The invention discloses a polypropylene powder for 3PP anticorrosion pipeline coating external layers, and a preparation method thereof. The polypropylene powder comprises, by weight, 80-90% of polyolefin matrix resin, 5-15% of a flexibilizer, 1-2% of a filler, 0-5% of a leveling agent and 0.1-1% of a heat and oxygen stabilizer, and the sum of weight percentages of all above raw materials is 100%. The preparation method comprises the following steps: 1, mixing the raw materials in proportion, and carrying out extrusion granulation on the mixed raw materials at 190-220 DEG C through a double screw extruder to obtain polypropylene granules; and 2, grinding the polypropylene granules obtained in step 1 to obtain the polypropylene powder. The polypropylene powder can be mainly used in petroleum natural gas anticorrosion pipelines as an anticorrosion layer material, is suitable for a powder sprinkling technology and a flame spraying technology, naturally levels in the construction process, has very good bonding strength with adhesives, and is suitable for anticorrosion of pipeline interfaces and bent tubes.

Description

technical field [0001] The invention relates to a polypropylene powder for the outer layer of a 3PP anticorrosion pipeline coating and a preparation method thereof, belonging to the technical field of anticorrosion coatings. Background technique [0002] In the existing technology, 3PE structures are mostly used in the field of pipeline anticorrosion. With the continuous deepening of energy development, the requirements for pipeline anticorrosion are getting higher and higher. Traditional 3PE cannot meet the requirements of harsh environments such as high temperature. 3PP has excellent anti-corrosion comprehensive performance. In order to integrate the advantages of epoxy powder and polypropylene, the extruded polypropylene can be used at a temperature of 120 degrees, and can even withstand a high temperature of 140 degrees for a short time. 3PP anti-corrosion technology entered our country at the beginning of the 20th century, and the scale is getting bigger and bigger, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/12C08L23/02C08L23/16C08K3/22C08K3/04C08K5/134C08K5/526C09D123/14C09D123/12C09D123/02C09D5/03C09D5/08C09D7/12
CPCC08L23/14C08L2201/08C08L2205/02C08L2205/025C08L2205/035C09D5/03C09D5/08C09D7/61C09D7/63C09D123/14C08L23/12C08L23/02C08K2003/2241C08K5/1345C08K5/526C08L23/16C08K3/04
Inventor 张阳阳唐舫成杜壮梁鼎贤
Owner GUANGZHOU LUSHAN NEW MATERIALS
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