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A kind of polyethylene powder for anti-corrosion pipeline and preparation method thereof

A polyethylene powder and polyethylene technology, applied in powder coatings, anti-corrosion coatings, coatings, etc., can solve the problems of lack of contrast in anti-corrosion effects of steel pipes, inconsistent anti-corrosion ideas, and high energy consumption, achieve good dry powder fluidity, improve Anti-corrosion effect, the effect of simplifying the production process

Active Publication Date: 2017-09-12
GUANGZHOU LUSHAN NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 3PE anti-corrosion also has its own defects, mainly as follows: First, traditionally, the three-layer PE coating of steel pipes at home and abroad is formed by extruders to extrude the middle binder and the outer layer of polyethylene respectively to make it coated On the outside of the epoxy primer, for each set of production molding equipment, two extrusion equipment are required, and the energy consumption is relatively large
Although the patent CN1865379A adopts a two-layer structure, the outer polyethylene anti-corrosion glue still adopts the traditional extrusion process, which does not fundamentally solve the problems caused by the process
The epoxy-modified polyethylene two-component powder coating described in patent CN101240134A uses polyethylene as the matrix resin for both components, and epoxy-modifies polyethylene. This method is inconsistent with the traditional 3PE anti-corrosion thinking. The anti-corrosion effect is not comparable

Method used

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  • A kind of polyethylene powder for anti-corrosion pipeline and preparation method thereof
  • A kind of polyethylene powder for anti-corrosion pipeline and preparation method thereof
  • A kind of polyethylene powder for anti-corrosion pipeline and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A polyethylene powder for anti-corrosion pipelines, prepared from the following raw materials by weight percentage: 7% polyethylene graft adhesive resin, 55% polyolefin matrix resin, 23% polyolefin reinforced resin, toughened Agent 10%, polyacrylate (leveling agent) 0%, carbon black masterbatch 4.5%, antioxidant 0.5%.

[0030] Wherein, the formula (100%) of polyolefin matrix resin:

[0031] HDPE 70%;

[0032] LDPE 30%;

[0033] Wherein, the composition of toughening agent is (100%):

[0034] POE 75%;

[0035] SEBS 25%;

[0036] Wherein the composition of antioxidant is (100%):

[0037] Antioxidant 1010 30%;

[0038] Antioxidant 168 60%;

[0039] Light stabilizer 10%.

[0040] A preparation method of polyethylene powder for anticorrosion pipelines, comprising the following steps:

[0041] 1) Add the raw materials into the high-speed blender according to the formula ratio, and after mixing evenly, extrude and granulate through the twin-screw extruder at a tempera...

Embodiment 2

[0044]A polyethylene powder for anti-corrosion pipelines, prepared from the following raw materials by weight percentage: 8% polyethylene graft adhesive resin, 50% polyolefin matrix resin, 22% polyolefin reinforced resin, toughened Agent 10%, polyacrylate leveling agent 5%, carbon black masterbatch 4.6%, antioxidant 0.4%.

[0045] Wherein, the formula (100%) of polyolefin matrix resin:

[0046] HDPE 60%;

[0047] Low density polyethylene 40%;

[0048] Wherein, the composition of toughening agent is (100%):

[0049] POE 100%;

[0050] Wherein the composition of antioxidant is (100%):

[0051] Antioxidant B245 80%;

[0052] Light stabilizer 20%;

[0053] A preparation method of polyethylene powder for anticorrosion pipelines, comprising the following steps:

[0054] 1) Add the raw materials into the high-speed blender according to the formula ratio, and after mixing evenly, extrude and granulate through the twin-screw extruder at a temperature of 190°C to obtain polyethyl...

Embodiment 3

[0057] A polyethylene powder for anti-corrosion pipelines, prepared from the following raw materials by weight percentage: 10% polyethylene graft adhesive resin, 50% polyolefin matrix resin, 25% polyolefin reinforced resin, toughened Agent 5%, polyacrylate leveling agent 5%, carbon black masterbatch 4.6%, antioxidant 0.4%.

[0058] Wherein, the formula (100%) of polyolefin matrix resin:

[0059] HDPE 50%;

[0060] LDPE 50%;

[0061] Wherein, the toughening agent is composed of:

[0062] POE 50%;

[0063] EVA 50%;

[0064] Wherein the composition of antioxidant is:

[0065]

[0066] A preparation method of polyethylene powder for anticorrosion pipelines, comprising the following steps:

[0067] 1) Add the raw materials into the high-speed blender according to the formula ratio, and after mixing evenly, extrude and granulate through a twin-screw extruder at a temperature of 220°C to obtain polyethylene pellets; the screw speed of the extruder is 400rpm, and the twin-scr...

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Abstract

The invention discloses polyethylene powder for an anti-corrosive pipeline and a preparation method for the polyethylene powder. A double-screw extrusion process is adopted for extrusion blending and granulation, and mechanical grinding is carried out to obtain the polyethylene powder; the polyethylene powder is prepared from the following raw materials by weight percent: 5-10% of polyethylene bonding resin, 25-65% of polyolefin matrix resin, 15-30% of polyethylene reinforced resin, 5-20% of a flexibilizer, 0-10% of a leveler, 4-6% of carbon black masterbatch and 0.1-0.5% of an antioxidant. The powder is good in dry powder fluidity and leveling property, excellent in mechanical property, environmental stress crack resistance, ultraviolet aging resistance and pressure resistance, corrosion-resistant and suitable for a powder spreading process and a flame spraying process, and has very high bonding strength with epoxy powder.

Description

technical field [0001] The invention belongs to the field of coatings and relates to the application of functionalized polyethylene and blends thereof, in particular to a polyethylene powder for anti-corrosion pipelines and a preparation method thereof. Background technique [0002] Pipeline and component anticorrosion plays an important role in the overall structure of the national economy, and is related to the safety of use and service life of facilities in fields such as oil transportation, gas transportation, and coal mines. Since the 1990s, the pipeline anti-corrosion field has mostly adopted a three-layer (three-PE) structure, which mainly includes an inner epoxy powder layer, an intermediate adhesive layer, and an outer polyethylene protective layer. In the three-layer structure, the epoxy powder plays the most critical anti-corrosion function, and the middle adhesive layer and the outer polyethylene layer protect the epoxy powder to ensure that the epoxy powder can ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D123/06C09D123/08C09D151/06C09D123/16C09D153/02C09D7/12C09D5/08C09D5/46C08F255/02F16L58/10
CPCC08L2201/08C08L2205/025C08L2205/035C08L2207/062C08L2207/066C09D5/03C09D5/08C09D7/40C09D7/61C09D7/63C09D7/65C09D123/06F16L58/10C08L23/06C08L23/0815C08L53/025C08L51/06C08K13/02C08K5/1345C08K3/04C08K5/526C08L33/04C08L23/0853
Inventor 张阳阳伍金奎唐舫成杜壮
Owner GUANGZHOU LUSHAN NEW MATERIALS
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