CN101747552B - Steel-pipeline outer-layer anticorrosive polyethylene compound and preparation method thereof - Google Patents
Steel-pipeline outer-layer anticorrosive polyethylene compound and preparation method thereof Download PDFInfo
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- CN101747552B CN101747552B CN2009102479984A CN200910247998A CN101747552B CN 101747552 B CN101747552 B CN 101747552B CN 2009102479984 A CN2009102479984 A CN 2009102479984A CN 200910247998 A CN200910247998 A CN 200910247998A CN 101747552 B CN101747552 B CN 101747552B
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Abstract
The invention provides a steel-pipeline outer-layer anticorrosive polyethylene compound and a preparation method thereof. The steel-pipeline outer-layer anticorrosive polyethylene compound consists of the following raw materials in part by weight: 45 to 80 parts of high-density polyethylene resin, 15 to 45 parts of linear low-density polyethylene resin, 0.3 to 1 part of antioxidant, 0.5 to 1.5 parts of processing aid, 1 to 3 parts of functional master batch and 3 to 7 parts of carbon black master batch, wherein the high-density polyethylene resin is a mixture of pipe-grade high-density polyethylene resin and at least one of big hollow-grade high-density polyethylene resin, film-grade high-density polyethylene resin, wiredrawing-grade high-density polyethylene resin and small hollow-grade high-density polyethylene resin. The preparation method comprises the steps of stirring, mixing, extruding and granulating. The method has the advantages of adopting the performance of different polyethylene for complementation and improving the processability and environmental stress cracking resistance of products on the premise of satisfying standard performance regulations.
Description
Technical field
The present invention relates to a kind of steel-pipeline outer-layer anticorrosive polyethylene compound and preparation method thereof, belong to the polymer blending modification technical field.
Background technology
Pipeline transportation is the important composition part of communications and transportation in the national economy.At western developed countries such as America and Europes, the amount of pipeline transportation accounts for whole goods and materials traffic capacity more than 7%, and the goods and materials of conveying also expand to fields such as coal slurry, ore slurry except that crude oil, processed oil, Sweet natural gas, tap water and Chemicals.And the present pipe-line transmission capacity of China only accounts for ten thousand in whole goods and materials traffic capacity/less than, pipe-line transportation industry development space is very huge, corresponding pipeline corrosion protection industry also will have wide development space.
Crude oil, processed oil and natural gas transportation are used through antiseptic steel pipe in a large number, and two-layer structure polyethylene anticorrosive coating (2PE) and three-decker polyethylene anticorrosive coating (3PE) technology are the state-of-the-art corrosion-proof technology for pipeline that development in recent years is got up.
The bottom of 2PE is a tackiness agent, and skin is a Vilaterm; The bottom of 3PE is an epoxy coating, and the centre is a tackiness agent, and surface layer is a Vilaterm.Wherein the 3PE technical feature is optimum, uses the widest.Epoxy powder is sprayed on the steel tube surface through the shot blasting post-heating, forms fusion bonded epoxy layer bottom, and it has excellent corrosion resistance nature and anti-cathodic disbonding performance; The middle layer tackiness agent is extruded through side direction and is wrapped in outside the epoxy bottom, and epoxy layer and outermost layer Vilaterm strong bond are in the same place.Vilaterm also is to extrude through side direction to be wrapped on the steel pipe, after cooling forms three layers of complete anticorrosion structure.
Vilaterm is a non-polar polymer, and percent crystallinity is high, has that excellent resistant to chemical media burn into is ageing-resistant, the performance of anti-biological attack, and rate of permeation is extremely low, can intercept the erosion of materials such as water effectively, in three layers of anticorrosion structure, plays most importantly acting on.
The single model polyvinyl resin of the direct synthetic of petroleum chemical enterprise is difficult to take into account the unification of processing characteristics and product requirement performance; Need dissimilar polyvinyl resins and carbon black, composite antioxidant etc. to extrude and process homogeneous material through melt blending; Just can reach the requirement such as mechanical property and ultraviolet-resistant aging, heat-proof aging, resisting environmental stress and cracking of regulation, and satisfy side direction and extrude winding process.Shortcomings such as the outer anticorrosion Vilaterm prescription of present steel pipe is single, and resin only limits to tubing level high-density polyethylene and linear low density polyethylene, exists raw material supply unstable, and price is high, and the performance setting range is little, and apparatus adaptability is not ideal enough.
Summary of the invention
The objective of the invention is deficiency, a kind of steel-pipeline outer-layer anticorrosive polyethylene compound and preparation method thereof is provided to prior art.
For realizing above purpose, technological ten thousand cases of the present invention provide a kind of steel-pipeline outer-layer anticorrosive polyethylene compound, it is characterized in that, are made up of following raw material in weight part:
High-density polyethylene resin: 45～80;
Linear low density polyethylene resin: 15～45;
Oxidation inhibitor 0.3～1;
Processing aid 0.5～1.5;
Functional agglomerate 1～3;
Carbon black master batch 3～7;
Wherein, high-density polyethylene resin is at least a mixture in tubing level high-density polyethylene resin and big-and-middle vacant level high-density polyethylene resin, film-grade high-density polyethylene resin, wire drawing level high-density polyethylene resin and the little hollow level high-density polyethylene resin.
Described oxidation inhibitor is made up of primary antioxidant and auxiliary antioxidant, and primary antioxidant is a Hinered phenols antioxidant, and auxiliary antioxidant is a phosphite oxidation inhibitor.Oxidation inhibitor guarantees that material has satisfactory stability property in the processing use, avoids thermooxidative degradation to cause material property to reduce.
Described Hinered phenols antioxidant is an antioxidant 1010.
Described phosphite oxidation inhibitor is oxidation inhibitor 168.
Described processing aid is a lubricant.Energy consumption when lubricant can reduce plastic working reduces internal friction produces in the course of processing heat and mechanical stress, thereby improves the thermostability of plastics.
Described lubricant is the mixture of internal lubricant calcium stearate and external lubricant PE wax.
Described functional agglomerate is a fluoropolymer.The adding of functional agglomerate can reduce surface imperfection, like phenomenons such as common melt fracture, burrs, improves product surface luminance brightness and slickness, makes color divergence more even, improves glossiness and reduces an elimination mouthful mould buildup phenomenon.
The present invention also provides the preparation method of above-mentioned steel-pipeline outer-layer anticorrosive polyethylene compound; It is characterized in that; Concrete steps are: high-density polyethylene resin, linear low density polyethylene resin, carbonarius mother, functional agglomerate, processing aid are stirred in high mixer add oxidation inhibitor after one minute; Restir three minutes is sent into the Preblend that stirs in the twin screw extruder extruding pelletization.
The present invention has the following advantages:
Compared with prior art, the present invention has used part film-grade high density polyethylene(HDPE) to substitute tubing level Vilaterm, and this change can reduce cost on the one hand, improves melt ductility on the other hand, the glossiness on tablet surface after the increase moulding.
Compared with prior art, the present invention has used the big-and-middle vacant level high density polyethylene(HDPE) of part to substitute tubing level Vilaterm, and the mechanical property of product significantly improves after evidence partly substitutes, and normal temperature and the test of pyritous penetration hardness are much better than like product.
Compared with prior art, the present invention has used the little hollow level high-density polyethylene of part to substitute tubing level Vilaterm, has increased the melt flow rate(MFR) of product, has improved the processing characteristics of product.
Compared with prior art, the present invention has used part wire drawing level high-density polyethylene to substitute tubing level Vilaterm, utilizes wire drawing level polyethylene melt viscoelasticity good, and the advantage that elongation at break is high has guaranteed production stability in the anticorrosion processing of small-bore pipeline.
Compared with prior art, the present invention has adopted and in prescription, has added a certain proportion of linear low density polyethylene, has improved the environmental stress cracking resistance of product greatly.
Compared with prior art; It is the functional agglomerate of nfrastructure with the fluoropolymer that the present invention has added a spot of in prescription; Eliminated tangerine peel and scalelike mark (melt fracture) phenomenon that like product has, the luminance brightness and the slickness of product surface after the moulding and thickness evenness and the dimensional stability of extruding tablet all have been significantly improved.
In addition, raw material sources variation of the present invention, supply is stable, low price; Setting ranges such as thermotolerance, hardness, flowability are wide, can adapt to the differentiation requirement of domestic and international disparity items to product performance; The technology setting range is wide, can adapt to dissimilar extruder screws.
Embodiment
Specify the present invention below in conjunction with embodiment.
Embodiment 1
A kind of steel-pipeline outer-layer anticorrosive polyethylene compound, form by following raw material in weight part:
Tubing level high-density polyethylene: 30
Film-grade high density polyethylene(HDPE): 20
Little hollow level high-density polyethylene: 15
Linear low density polyethylene: 25
Carbonarius is female: 4.5
Functional agglomerate: 1
Processing aid: 1.5
Oxidation inhibitor: 0.5
Wherein, said tubing level high-density polyethylene is the TR480AT type high density polyethylene(HDPE) that the luxuriant and rich with fragrance ltd of Shanghai gold produces.
Described film-grade high density polyethylene(HDPE) is the HD5301AA type high density polyethylene(HDPE) that Shanghai Sai Ke ltd produces.
Described little hollow level high-density polyethylene is the HHM5502 type high density polyethylene(HDPE) that Shanghai Sai Ke ltd produces.
The 7042 molded lines property new LDPE (film grade)s that described linear low density polyethylene is produced for Jilin Petrochemical ltd.
Described carbonarius mother is the 2080 type carbonariuses mother that Foshan color Le Fu ltd produces.
Described oxidation inhibitor is the antioxidant 1010 of Ningbo gold Hai Yabao ltd production and the mixture of oxidation inhibitor 168, and weight percent is 1: 1.
Described functional agglomerate is the PPA type functional agglomerate that Minnesota Mining and Manufacturing Company produces.
Described lubricant comprises internal lubricant calcium stearate and external lubricant PE wax, and weight percent is 1: 2.
The preparation method of above-mentioned mixing material is following: polyvinyl resin, carbonarius mother, functional agglomerate, processing aid are stirred in high mixer add oxidation inhibitor after one minute; Restir three minutes; The Preblend that stirs is sent in the twin screw extruder; The high speed shear of twin screw and mixing down, material is able to sufficient fusing, compound, extruding pelletization again, is finally packaged as finished product.
This product is matrix resin with the Vilaterm, and suitable processing temperature is 200～240 ℃, and the finished product of unpacking should once use up, and produces the pit phenomenon when avoiding taking place the moisture absorption and causing extruding.Extrude the temperature precise control that should guarantee forcing machine when producing.
Embodiment 2
A kind of steel-pipeline outer-layer anticorrosive polyethylene compound, form by following raw material in weight part:
Tubing level high-density polyethylene: 40
Big-and-middle vacant level high density polyethylene(HDPE): 28
Linear low density polyethylene: 22
Carbonarius is female: 5
Functional agglomerate: 3
Processing aid: 1.5
Oxidation inhibitor: 0.5
Wherein, said tubing level high-density polyethylene is the TR480M type high density polyethylene(HDPE) that Maoming petrochemical industry ltd produces.
Described big-and-middle vacant level high density polyethylene(HDPE) is the HXM 50100 type high density polyethylene(HDPE)s that Shanghai Sai Ke ltd produces.
Described linear low density polyethylene is the 0220AA molded lines property new LDPE (film grade) that Shanghai Sai Ke ltd produces.
Described carbonarius mother is the M9001 type carbonarius mother that the capable ltd of intention produces.
Described oxidation inhibitor is the antioxidant 1010 of Ningbo gold Hai Yabao ltd production and the mixture of oxidation inhibitor 168, and weight percent is 1: 1.
Described functional agglomerate is the PPA type functional agglomerate that Minnesota Mining and Manufacturing Company produces.
Thawing machine calcium stearate and external lubricant PE wax in described lubricant comprises, weight percent is 1: 2.
The preparation method of above-mentioned mixing material is following: polyvinyl resin, carbonarius mother, functional agglomerate, processing aid are stirred in high mixer add oxidation inhibitor after one minute; Restir three minutes; The Preblend that stirs is sent in the twin screw extruder; The high speed shear of twin screw and mixing down, material is able to sufficient fusing, compound, extruding pelletization again, is finally packaged as finished product.
This product is matrix resin with the Vilaterm, and suitable processing temperature is 200～240 ℃, and the finished product of unpacking should once use up, and produces the pit phenomenon when avoiding taking place the moisture absorption and causing extruding.Extrude the temperature precise control that should guarantee forcing machine when producing.
Embodiment 3
A kind of steel-pipeline outer-layer anticorrosive polyethylene compound, form by following raw material in weight part:
Tubing level high-density polyethylene: 40
Wire drawing level high-density polyethylene: 20
Linear low density polyethylene: 30.5
Carbonarius is female: 5
Functional agglomerate: 2.5
Processing aid: 1.5
Oxidation inhibitor: 0.5
Wherein, said tubing level high-density polyethylene is the HD4801EX type high density polyethylene(HDPE) of Dushanzi ltd production.
Described wire drawing level high-density polyethylene is to raise the 5000S type high density polyethylene(HDPE) that sub-petro-chemical corporation produces.
Described linear low density polyethylene is the 0209AA molded lines property new LDPE (film grade) that Panjin petrochemical industry ltd produces.
The female 2772 type carbonariuses for the production of Cabot ltd of described carbonarius are female.
Described oxidation inhibitor is the antioxidant 1010 of Ningbo gold Hai Yabao ltd production and the mixture of oxidation inhibitor 168, and weight percent is 1: 1.
Described functional agglomerate is the PPA type functional agglomerate that Minnesota Mining and Manufacturing Company produces.
Described lubricant comprises internal lubricant calcium stearate and external lubricant PE wax, and weight percent is 1: 2.
The preparation method of above-mentioned mixing material is following: polyvinyl resin, carbonarius mother, functional agglomerate, processing aid are stirred in high mixer add oxidation inhibitor after one minute; Restir three minutes; The Preblend that stirs is sent in the twin screw extruder; The high speed shear of twin screw and mixing down, material is able to sufficient fusing, compound, extruding pelletization again, is finally packaged as finished product.
This product is matrix resin with the Vilaterm, and suitable processing temperature is 200～240 ℃, and the finished product of unpacking should once use up, and produces the pit phenomenon when avoiding taking place the moisture absorption and causing extruding.Extrude the temperature precise control that should guarantee forcing machine when producing.
Embodiment 4
A kind of steel-pipeline outer-layer anticorrosive polyethylene compound, form by following raw material in weight part:
Tubing level high-density polyethylene resin: 20;
Big-and-middle vacant level high density polyethylene(HDPE) 20
Film-grade high density polyethylene(HDPE) 20
Little hollow level high-density polyethylene 20
Linear low density polyethylene resin: 15;
Oxidation inhibitor 0.3;
Processing aid 0.5;
Functional agglomerate 1;
Carbon black master batch 3;
Wherein, said tubing level high-density polyethylene is 2480 type high density polyethylene(HDPE)s of Qilu Petrochemical ltd production.
Described big-and-middle vacant level high density polyethylene(HDPE) is the 5421B type high density polyethylene(HDPE) that shell ltd of CNOOC produces.
The 9455F type high density polyethylene(HDPE) that described film-grade high density polyethylene(HDPE) is produced for Jilin Petrochemical ltd.
The 6200NT7 type high density polyethylene(HDPE) that described little hollow level high-density polyethylene is produced for DOW Chemical ltd.
The 7042 molded lines property new LDPE (film grade)s that described linear low density polyethylene is produced for Jilin Petrochemical ltd.
Described carbonarius mother is the NB9705 type carbonarius mother that Korea S friend's star ltd produces.
Described oxidation inhibitor is the antioxidant 1010 of Ningbo gold Hai Yabao ltd production and the mixture of oxidation inhibitor 168, and weight percent is 1: 1.
Described functional agglomerate is the PPA type functional agglomerate that Minnesota Mining and Manufacturing Company produces.
Thawing machine calcium stearate and external lubricant PE wax in described lubricant comprises, weight percent is 1: 2.
The preparation method is following: polyvinyl resin, carbonarius mother, functional agglomerate, processing aid are stirred in high mixer add oxidation inhibitor after one minute; Restir three minutes; The Preblend that stirs is sent in the twin screw extruder; The high speed shear of twin screw and mixing down, material is able to sufficient fusing, compound, extruding pelletization again, is finally packaged as finished product.
This product is matrix resin with the Vilaterm, and suitable processing temperature is 200～240 ℃, and the finished product of unpacking should once use up, and produces the pit phenomenon when avoiding taking place the moisture absorption and causing extruding.Extrude the temperature precise control that should guarantee forcing machine when producing.
Embodiment 5
A kind of steel-pipeline outer-layer anticorrosive polyethylene compound, form by following raw material in weight part:
Tubing level high-density polyethylene resin: 15;
Big-and-middle vacant level high density polyethylene(HDPE) 10
Film-grade high density polyethylene(HDPE) 10
Little hollow level high-density polyethylene 10
Linear low density polyethylene resin: 45;
Oxidation inhibitor 1;
Processing aid 1.5;
Functional agglomerate 3;
Carbon black master batch 7;
Wherein, said tubing level high-density polyethylene is 2480 type high density polyethylene(HDPE)s of Qilu Petrochemical ltd production.
Described big-and-middle vacant level high density polyethylene(HDPE) is the 5121B type high density polyethylene(HDPE) that shell ltd of CNOOC produces.
Described film-grade high density polyethylene(HDPE) is the TR144 type high density polyethylene(HDPE) that Chevron Fei Lipusi ltd produces.
The 6200NT7 type high density polyethylene(HDPE) that described little hollow level high-density polyethylene is produced for DOW Chemical ltd.
Described linear low density polyethylene is the 0209AA molded lines property new LDPE (film grade) that Panjin petrochemical industry ltd produces.
Described carbonarius mother is the NB9705 type carbonarius mother that Korea S friend's star ltd produces.
Described oxidation inhibitor is the antioxidant 1010 of Ningbo gold Hai Yabao ltd production and the mixture of oxidation inhibitor 168, and weight percent is 1: 1.
Described functional agglomerate is the PPA type functional agglomerate that Minnesota Mining and Manufacturing Company produces.
Thawing machine calcium stearate and external lubricant PE wax in described lubricant comprises, weight percent is 1: 2.
The preparation method is following: polyvinyl resin, carbonarius mother, functional agglomerate, processing aid are stirred in high mixer add oxidation inhibitor after one minute; Restir three minutes; The Preblend that stirs is sent in the twin screw extruder; The high speed shear of twin screw and mixing down, material is able to sufficient fusing, compound, extruding pelletization again, is finally packaged as finished product.
This product is matrix resin with the Vilaterm, and suitable processing temperature is 200～240 ℃, and the finished product of unpacking should once use up, and produces the pit phenomenon when avoiding taking place the moisture absorption and causing extruding.Extrude the temperature precise control that should guarantee forcing machine when producing.
Performance of products detected result of the present invention is following:
Claims (7)
1. a steel-pipeline outer-layer anticorrosive polyethylene compound is characterized in that, is made up of following raw material in weight part:
High-density polyethylene resin: 45～80;
Linear low density polyethylene resin: 15～45;
Oxidation inhibitor 0.3～1;
Processing aid 0.5～1.5;
Functional agglomerate 1～3;
Carbon black master batch 3～7;
Wherein, High-density polyethylene resin is at least a mixture in tubing level high-density polyethylene resin and big-and-middle vacant level high-density polyethylene resin, film-grade high-density polyethylene resin, wire drawing level high-density polyethylene resin and the little hollow level high-density polyethylene resin, and described functional agglomerate is a fluoropolymer; Described big-and-middle vacant level high-density polyethylene resin does
HXM50100 type high density polyethylene(HDPE), 5421B type high density polyethylene(HDPE) or 5121B type high density polyethylene(HDPE); Described little hollow level high-density polyethylene is 6200 NT7 type high density polyethylene(HDPE)s or HHM5502 type high density polyethylene(HDPE).
2. steel-pipeline outer-layer anticorrosive polyethylene compound as claimed in claim 1 is characterized in that described oxidation inhibitor is made up of primary antioxidant and auxiliary antioxidant, and primary antioxidant is a Hinered phenols antioxidant, and auxiliary antioxidant is a phosphite oxidation inhibitor.
3. steel-pipeline outer-layer anticorrosive polyethylene compound as claimed in claim 2 is characterized in that described Hinered phenols antioxidant is an antioxidant 1010.
4. steel-pipeline outer-layer anticorrosive polyethylene compound as claimed in claim 2 is characterized in that, described phosphite oxidation inhibitor is oxidation inhibitor 168.
5. steel-pipeline outer-layer anticorrosive polyethylene compound as claimed in claim 1 is characterized in that, described processing aid is a lubricant.
6. steel-pipeline outer-layer anticorrosive polyethylene compound as claimed in claim 5 is characterized in that, described lubricant is the mixture of internal lubricant calcium stearate and external lubricant PE wax.
7. the preparation method of the described steel-pipeline outer-layer anticorrosive polyethylene compound of claim 1; It is characterized in that; Concrete steps are: high-density polyethylene resin, linear low density polyethylene resin, carbonarius mother, functional agglomerate, processing aid are stirred in high mixer add oxidation inhibitor after one minute; Restir three minutes is sent into the Preblend that stirs in the twin screw extruder extruding pelletization.
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| CN2009102479984A CN101747552B (en) | 2009-12-31 | 2009-12-31 | Steel-pipeline outer-layer anticorrosive polyethylene compound and preparation method thereof |
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| CN101747552B true CN101747552B (en) | 2012-06-06 |
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Families Citing this family (13)
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| CN101891918A (en) * | 2010-07-26 | 2010-11-24 | 镇国广 | Silver gray anti-ultraviolet and weather-resistance polyethylene overhead insulation material |
| CN102400546A (en) * | 2011-10-13 | 2012-04-04 | 重庆大众防腐有限公司 | Glass fiber reinforced plastic anti-corrosion layer spray coating process for anti-corrosion effect of chimneys, flues, other pipelines and containers |
| CN103160014B (en) * | 2011-12-15 | 2016-06-15 | 中国石油化工股份有限公司 | A kind of polyethylene resin composition for hot water pipeline and preparation method |
| CN102585326B (en) * | 2011-12-28 | 2014-07-02 | 广州鹿山新材料股份有限公司 | Coarsening particle for external anticorrosive layers of oil-gas transmitting three-layer polyethylene (3PE) pipelines and preparation method thereof |
| CN103450540A (en) * | 2012-05-28 | 2013-12-18 | 中国石油天然气股份有限公司 | Special polyethylene material for 3PE corrosion prevention and preparation method thereof |
| RU2599574C1 (en) * | 2015-09-17 | 2016-10-10 | Публичное Акционерное Общество "Нижнекамскнефтехим" | Polyethylene composition for outer coating layer of steel pipes |
| CN105860208A (en) * | 2016-04-28 | 2016-08-17 | 苏州新区华士达工程塑胶有限公司 | High-temperature resistant anticorrosion plastic |
| CN106046479B (en) * | 2016-06-14 | 2018-05-15 | 中广核拓普（四川）新材料有限公司 | A kind of high carbon black dispension degree polyethylene pellet and preparation method thereof |
| CN107540919A (en) * | 2017-09-29 | 2018-01-05 | 镇江市星耀智能装备有限公司 | A kind of corrosion protective covering for pipeline |
| CN108948493B (en) * | 2018-07-19 | 2021-04-13 | 青岛威东科高分子材料有限公司 | Ultralow-temperature high-density polyethylene anticorrosive material for steel pipeline and preparation method thereof |
| CN111607153A (en) * | 2020-06-30 | 2020-09-01 | 江南大学 | High-wear-resistance material of organic polymer modified crosslinked polyethylene and preparation method thereof |
| CN112745548A (en) * | 2020-12-14 | 2021-05-04 | 金发科技股份有限公司 | Low-temperature-resistant polyethylene composite material and preparation method and application thereof |
| CN113583327A (en) * | 2021-08-26 | 2021-11-02 | 济宁迅大管道防腐材料有限公司 | Polyethylene anticorrosive coating elbow pipe anticorrosive belt for buried steel pipeline |
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Application publication date: 20100623 Assignee: Mianyang Dongfang Special Engineering Plastic Co., Ltd. Assignor: Golden hair Polytron Technologies Inc |Shanghai golden hair science and Technology Development Co., Ltd. Contract record no.: 2013440000582 Denomination of invention: Steel-pipeline outer-layer anticorrosive polyethylene compound and preparation method thereof Granted publication date: 20120606 License type: Exclusive License Record date: 20131225 |
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