CN102585326B - Coarsening particle for external anticorrosive layers of oil-gas transmitting three-layer polyethylene (3PE) pipelines and preparation method thereof - Google Patents
Coarsening particle for external anticorrosive layers of oil-gas transmitting three-layer polyethylene (3PE) pipelines and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a coarsening particle for external anticorrosive layers of oil-gas transmitting three-layer polyethylene (3PE) pipelines and a preparation method thereof. The coarsening particle for the 3PE pipeline comprises the components with weight percentages as follows: 55 percent to 80 percent of high density polyethylene (HDPE), 15 percent to 35 percent of linear low density polyethylene (LLDPE), 3 percent to 10 percent of toughening agents, 2 percent to 5 percent of black color batches, 0.1 percent to 0.3 percent of thermal oxidation stabilizing agent, 0.1 percent to 0.3 percent of ultraviolet absorbing agent and 0.1 percent to 0.3 percent of light stabilizing agent. After being evenly premixed, the compound is blended and granulated through a twin-screw extruder; and then particle material is finely cut underwater or ground into powder through liquid nitrogen refrigeration, so as to prepare powder with particle size of 200 to 500 Mum. The coarsening particle for the external-anticorrosive layers of the oil-gas transmitting 3PE pipelines for has good anti-slip performance, a wide processing technology range, high mechanical strength and high anti-aging performance; the outer layer HDPE has an extremely good cohesive force; and the production process is simple and easy to control. The coarsening particle can be applied to outer surface coarsening treatment of submarine counterweight transmitting pipelines for petroleum and natural gas and 3PE pipelines of which the surfaces need to be coarsened.
Description
Technical field
The present invention relates to a kind of preservative coat composition and method of making the same, belong to energy transport pipe admixture technical field, relate in particular to a kind of oil gas and carry outer anticorrosion alligatoring particle of 3PE pipeline and its preparation method and application.
Background technology
Energy transport pipe outer anticorrosion the most conventional with 3PE (three-layer polyethelene), 3PE external anti-corrosion layer is also the most widely used preservative coat of current submerged pipeline.When 3PE pipeline is used for some special areas as high mountain, some special dimensions are as submerged pipeline counterweight, just need to consider that pipeline smooth outer surface may cause tumble, the problem such as slippage, at this moment need external anti-corrosion layer surface to carry out roughening treatment, the processing mode of roughening treatment mainly contains:
1) μ m Molten Slag Method, is exactly that external anti-corrosion layer is wrapped on pipe also uncolled when curing, sprinkles alligatoring particle, thereby increase surperficial roughness on surface;
2) sanding method, is similar to the method for shot blasting, uses sand shaker by external anti-corrosion layer surface hacking, complex process, and cost is higher;
3) motor wire brush hacking method, method is simple, but PE preservative coat outer wall can produce the scratch of certain depth, damages the performance of external anti-corrosion layer.
Therefore, how preparing a kind of simple to operately and don't affect the alligatoring particle of external anti-corrosion layer quality, is the subject matter that current one of ordinary skill in the art need to solve.
Summary of the invention
For addressing the above problem, the object of the present invention is to provide a kind of new oil gas to carry the outer anticorrosion alligatoring particle of 3PE pipeline, making it meet 3PE pipeline adopts Molten Slag Method required while carrying out roughening treatment, improve the roughness of 3PE anti-corrosive steel tube outside surface, good with external anti-corrosion layer cohesive force, non-skid property is good.
Another object of the present invention is to provide the preparation method of the outer anticorrosion alligatoring particle of above-mentioned oil gas conveying 3PE pipeline.
In order to achieve the above object, technical scheme of the present invention is as follows:
The composition of raw materials composition (mass percent) of the outer anticorrosion alligatoring particle of 3PE pipeline of the present invention is: high density polyethylene(HDPE) 55%-80%, linear low density polyethylene 15%-35%, toughner 3%-10%, black masterbatch 2%-5%, thermal oxidation stabilizer 0.1%-0.3%, UV light absorber 0.1%-0.3% and photostabilizer 0.1%-0.3%.
The preparation method of the outer anticorrosion alligatoring particle of 3PE pipeline of the present invention is: by even the pre-mixing according to the above ratio of high density polyethylene(HDPE), linear low density polyethylene, toughner, black masterbatch, thermal oxidation stabilizer, UV light absorber and photostabilizer; by twin screw extruder 190 DEG C of-210 DEG C of blending extrusion granulations; then by pellet fine pelletizing under water or by liquid nitrogen freezing at 0 DEG C～-40 DEG C abrasive dusts, prepare the powder that particle diameter is 200-500 μ m.
By technique scheme, the present invention has following significantly advantage and beneficial effect:
The outer anticorrosion alligatoring particle of 3PE pipeline obtaining by the present invention, has good non-skid property, and complete processing wide ranges, has fabulous bonding force to outer HDPE, has high physical strength and ageing-resistant performance; And production technique is simple, easily control; Do not affect again the quality of external anti-corrosion layer, can effectively solve that 3PE pipeline smooth outer surface may cause tumble, the problem such as slippage.Can be applicable to oil, Sweet natural gas seabed weight counterbalance conveying pipeline and need the outside surface roughening treatment of the 3PE pipeline of surface coarsening.
Embodiment
The outer anticorrosion alligatoring particle of a kind of 3PE pipeline of the present invention, calculate by mass percentage, formula comprises following component: high density polyethylene(HDPE) 55%-80%, linear low density polyethylene 15%-35%, toughner 3%-10%, black masterbatch 2%-5%, thermal oxidation stabilizer 0.1%-0.3%, UV light absorber 0.1%-0.3% and photostabilizer 0.1%-0.3%.
By even the pre-mixing according to the above ratio of above-mentioned compound; by twin screw extruder 190 DEG C of-210 DEG C of blending extrusion granulations; then by pellet fine pelletizing under water or by liquid nitrogen freezing at 0 DEG C～-40 DEG C abrasive dusts, prepare the powder that particle diameter is 200-500 μ m.
Described material of main part is the compound of high density polyethylene(HDPE) and linear low density polyethylene, and MI scope is 2.0-20g/10min.
Described toughner comprises one or two or more kinds the compound in polyethylene and ethylene copolymers elastomerics (POE), propylene-ethylene copolymers elastomerics (EPR, EPDM, Vistmaxx), ethylene-vinyl acetate copolymer EVA.Polyethylene and ethylene copolymers elastomerics, propylene-ethylene copolymers elastomerics, ethylene-vinyl acetate copolymer EVA, can select its one or more compounds.The preferred POE of the present invention and EVA, wherein the density of POE is 0.86-0.88g/cm3, melting index MI is 1-5g/10min (190 DEG C, 2.16g).Preferred VA≤25% of EVA, MI is 1-4g/10min (190 DEG C, 2.16g).
Described black masterbatch is the black agglomerate taking polyethylene or ethylene-vinyl acetate copolymer as carrier.The present invention selects the black masterbatch taking polyethylene as carrier.
Described thermal oxidation stabilizer adopts antioxidant 1010, irgasfos 168 and DSDTP is composite forms.
Described UV light absorber and photostabilizer are respectively UV944 and photostabilizer CS81.
The using method of the outer anticorrosion alligatoring particle of 3PE pipeline of the present invention can be expressed as follows:
Transportation pipe pipeline external anticorrosive coating PP Pipe Compound (the anticorrosion PP Pipe Compound of HDPE) is wrapped on pipe also uncolled when curing, PE alligatoring particle is trickled down on surface by dust gun or vibrations, utilize the heat that HDPE PP Pipe Compound discharges in process of cooling that PE alligatoring particulate fraction is melted, increase surfaceness.If the flow leveling of alligatoring particle is very good, all melt, roughness does not reach requirement.If alligatoring particle fusion is very little, inadequate with the degrees of fusion of external anti-corrosion layer, while being subject to External Force Acting, can come off, do not reach alligatoring effect yet.
The testing method of 3PE alligatoring particle of the present invention can be expressed as follows:
Outer 3PE anticorrosion PP Pipe Compound (the anticorrosion PP Pipe Compound of HDPE) is pressed into 2mm thick sheet with vulcanizing press at 220 DEG C, and melting sheet material, in Air-cooling Process, is trickled down PE alligatoring uniform particles on its surface.After completely cooling, its surface that firmly rubs, the powder weight coming off ratio should be less than 5%.
Below by specific embodiment, the present invention is further elaborated, but the present invention is not limited to this specific embodiment.
embodiment 1
The outer anticorrosion alligatoring particulate material formula of 3PE pipeline (calculating by mass percentage) is: high density polyethylene(HDPE) (MI is 8.0g/10min) 70%, linear low density polyethylene (MI is 5.0g/10min) 20%, POE (MI is 0.5g/10min) 5%, black masterbatch 4.5%, compound antioxidant 1010,168 and DSDTP (1: 1: 0.5 composite) 0.2%, UV light absorber UV9440.1%, photostabilizer CS810.2%.
By even the pre-mixing according to the above ratio of above-mentioned compound; by twin screw extruder 190 DEG C of-210 DEG C of blending extrusion granulations; then by pellet fine pelletizing under water or by liquid nitrogen freezing at 0 DEG C～-40 DEG C abrasive dusts, prepare the powder that particle diameter is 200-500 μ m.
embodiment 2
The outer anticorrosion alligatoring particulate material formula of 3PE pipeline (calculating by mass percentage) is: high density polyethylene(HDPE) (MI is 8.0g/10min) 70%, linear low density polyethylene (MI is 5.0g/10min) 20%, EVA (MI is 1.8g/10min, and VA content is 15%) 5%, black masterbatch 4.5%, compound antioxidant 1010,168 and DSDTP (1: 1: 0.5 composite) 0.2%, UV light absorber UV9440.1%, photostabilizer CS810.2%.
By even the pre-mixing according to the above ratio of above-mentioned compound; by twin screw extruder 190 DEG C of-210 DEG C of blending extrusion granulations; then by pellet fine pelletizing under water or by liquid nitrogen freezing at 0 DEG C～-40 DEG C abrasive dusts, prepare the powder that particle diameter is 200-500 μ m.
embodiment 3
The outer anticorrosion alligatoring particulate material formula of 3PE pipeline (calculating by mass percentage) is: high density polyethylene(HDPE) (MI is 8.0g/10min) 60%, linear low density polyethylene (MI is 5.0g/10min) 30%, POE (MI is 0.5g/10min) 5%, black masterbatch 4.5%, compound antioxidant 1010,168 and DSDTP (1: 1: 0.5 composite) 0.2%, UV light absorber UV9440.1%, photostabilizer CS810.2%.
By even the pre-mixing according to the above ratio of above-mentioned compound; by twin screw extruder 190 DEG C of-210 DEG C of blending extrusion granulations; then pellet is passed through to fine pelletizing under water or liquid nitrogen freezing at 0 DEG C～-40 DEG C abrasive dusts, prepare the powder that particle diameter is 200-500 μ m.
The product property of embodiment 1-3 sees the following form shown in 1.
The product property contrast of table 1 embodiment 1-3
From above-mentioned table 1, can find out, the product (the outer anticorrosion alligatoring particle of 3PE pipeline) of embodiment 1-3 all has high physical strength, has good non-skid property, and outer HDPE is had to fabulous bonding force; And production technique is simple, easily control; Do not affect again the quality of external anti-corrosion layer, can effectively solve that 3PE pipeline smooth outer surface may cause tumble, the problem such as slippage.
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, do not depart from technical solution of the present invention content therefore every, any simple modification, equivalent variations and the modification above embodiment done according to technical spirit of the present invention, all still belong in the scope of technical solution of the present invention.
Claims (6)
1. the outer anticorrosion alligatoring particle of 3PE pipeline, it is characterized in that, calculate by mass percentage formula and comprise following feed composition: high density polyethylene(HDPE) 55%-80%, linear low density polyethylene 15%-35%, toughner 3%-10%, black masterbatch 2%-5%, thermal oxidation stabilizer 0.1%-0.3%, UV light absorber 0.1%-0.3% and photostabilizer 0.1%-0.3%; The weight percent sum of described each feed composition meets 100%;
The particle diameter of the outer anticorrosion alligatoring particle of described 3PE pipeline is 200-500 μ m.
2. the anticorrosion alligatoring particle of 3PE according to claim 1, is characterized in that: described toughner is selected one or two or more kinds the compound in polyethylene and ethylene copolymers elastomerics POE, propylene-ethylene copolymers elastomerics, ethylene-vinyl acetate copolymer EVA.
3. the anticorrosion alligatoring particle of 3PE according to claim 1, is characterized in that: described black masterbatch is the black agglomerate taking polyethylene or ethylene-vinyl acetate copolymer as carrier.
4. the anticorrosion alligatoring particle of 3PE according to claim 1, is characterized in that: described thermal oxidation stabilizer adopts antioxidant 1010, irgasfos 168 and DSDTP is composite forms; Described UV light absorber and photostabilizer are respectively UV944 and photostabilizer CS81.
5. the preparation method of the outer anticorrosion alligatoring particle of the 3PE pipeline described in any one in claim 1-5, it is characterized in that: be high density polyethylene(HDPE) 55%-80% by mass percent, linear low density polyethylene 15%-35%, toughner 3%-10%, black masterbatch 2%-5%, thermal oxidation stabilizer 0.1%-0.3%, UV light absorber 0.1%-0.3% and photostabilizer 0.1%-0.3% pre-mixing are even, by the granulation of twin screw extruder blending extrusion; The pellet of above-mentioned composition is prepared powder by fine pelletizing under water or liquid nitrogen freezing abrasive dust, and the particle diameter of described powder is 200-500 μ m.
6. preparation method according to claim 7, is characterized in that: the extrusion temperature of described twin screw extruder is 190 DEG C-210 DEG C.
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| CN102936362A (en) * | 2012-10-22 | 2013-02-20 | 沈阳化工大学 | RHDPE particles used in pipe material, and preparation method thereof |
| CN103087385B (en) * | 2012-11-23 | 2014-12-24 | 长园长通新材料有限公司 | High-density high-temperature heat-shrinkable pressure-sensitive tape and preparation method thereof |
| CN103709483A (en) * | 2013-12-25 | 2014-04-09 | 上海金发科技发展有限公司 | Special high-density polyethylene compound for automobile windshield washer and preparation method thereof |
| CN105237853A (en) * | 2015-10-29 | 2016-01-13 | 山东融汇管通股份有限公司 | Cracking resistance modified polyethylene material and preparation method therefor |
| CN108178862A (en) * | 2017-12-29 | 2018-06-19 | 浙江九渊塑业有限公司 | Toughening modifying high-density polyethylene material and preparation method thereof |
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| CN101063500A (en) * | 2006-04-29 | 2007-10-31 | 中国海洋石油总公司 | Anti-drop method used for sintering epoxy powder anti-corrosive counterweight tube |
| CN1958656A (en) * | 2006-10-24 | 2007-05-09 | 辽宁艾海滑石有限公司 | Rigidity enhanced, modified dedicated material of plastic pipe material |
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Effective date of registration: 20201105 Address after: 510700 No.22, Pubei Road, YUNPU Industrial Zone, Huangpu District, Guangzhou City, Guangdong Province Patentee after: GUANGZHOU LUSHAN NEW MATERIALS Co.,Ltd. Patentee after: Jiangsu Lushan New Material Co.,Ltd. Address before: 510530, No. 22, Po Bei Road, Po Po Industrial Zone, Whampoa District, Guangdong, Guangzhou Patentee before: GUANGZHOU LUSHAN NEW MATERIALS Co.,Ltd. |
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