CN115011022A - Special anti-aging 3PE anti-corrosion material and preparation method and application thereof - Google Patents
Special anti-aging 3PE anti-corrosion material and preparation method and application thereof Download PDFInfo
- Publication number
- CN115011022A CN115011022A CN202210779050.9A CN202210779050A CN115011022A CN 115011022 A CN115011022 A CN 115011022A CN 202210779050 A CN202210779050 A CN 202210779050A CN 115011022 A CN115011022 A CN 115011022A
- Authority
- CN
- China
- Prior art keywords
- parts
- special
- aging
- resistant
- polyethylene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/223—Packed additives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/10—Coatings characterised by the materials used by rubber or plastics
- F16L58/1054—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe
- F16L58/109—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe the coating being an extruded layer
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/16—Ethene-propene or ethene-propene-diene copolymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3412—Heterocyclic compounds having nitrogen in the ring having one nitrogen atom in the ring
- C08K5/3432—Six-membered rings
- C08K5/3435—Piperidines
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
- C08K5/3477—Six-membered rings
- C08K5/3492—Triazines
- C08K5/34924—Triazines containing cyanurate groups; Tautomers thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
- C08K5/3477—Six-membered rings
- C08K5/3492—Triazines
- C08K5/34926—Triazines also containing heterocyclic groups other than triazine groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/37—Thiols
- C08K5/375—Thiols containing six-membered aromatic rings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/524—Esters of phosphorous acids, e.g. of H3PO3
- C08K5/526—Esters of phosphorous acids, e.g. of H3PO3 with hydroxyaryl compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention belongs to the field of 3PE corrosion prevention, and provides an anti-aging 3PE corrosion prevention special material, and a preparation method and application thereof. The special material for 3PE comprises the following raw materials in parts by weight: 40-70 parts of pipeline-grade polyethylene, 10-30 parts of I-type heat-resistant polyethylene, 10-20 parts of metallocene linear low-density polyethylene, 5-7 parts of carbon black master batch, 5-10 parts of ethylene and propylene copolymerized elastomer functional master batch, and the aging-resistant 3PE anti-corrosion special material is obtained by blending and twin-screw melt granulation. The special 3PE material for corrosion prevention has excellent mechanical property, excellent environmental stress crack resistance, good processability and excellent aging resistance, and the change rate of the melt mass flow rate of a product subjected to 100 ℃ heat aging for 7200h is not more than 35%. The special 3PE material for corrosion prevention is particularly suitable for corrosion prevention of large-caliber steel pipes with the diameter of more than 2 meters.
Description
Technical Field
The invention belongs to the field of 3PE corrosion prevention, and particularly relates to a 3PE special material for steel pipeline corrosion prevention, a preparation method and application thereof, and more particularly relates to a 3PE special material used for a large-diameter steel pipe with the diameter of more than 2 meters, and a preparation method and application thereof.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The 3PE anti-corrosion steel pipe is mainly applied to oil transmission, gas transmission and water transmission, and is a pipeline with the best anti-corrosion effect which is generally recognized at present. With the enhancement of the construction of basic implementation, the caliber of the pipeline for 3PE corrosion prevention in hydraulic engineering tends to be enlarged more and more. The special 3PE anticorrosive material is a protective layer on the outermost layer of the 3PE anticorrosive steel pipe, and the indexes of the special 3PE anticorrosive material, such as processability, mechanical property, aging resistance, environmental stress cracking resistance and the like, are related to the quality and the service life of the 3PE anticorrosive pipeline.
The inventor researches and discovers that in the prior art, the 3PE anti-corrosion special material is mainly prepared by blending high-density polyethylene, linear low-density polyethylene 7042, carbon black master batch and an antioxidant. Patent No. CN 101747552B discloses a composition of 3PE anticorrosive compound: high density polyethylene resin: 45-80 parts of; linear low density polyethylene resin: 15-45 parts of; 0.3-1 part of antioxidant; 0.5-1.5% of processing aid; 1-3 of functional master batch; 3-7 of carbon black master batch; wherein the high-density polyethylene resin is a mixture of a pipe-grade high-density polyethylene resin and at least one of a large-hollow-grade high-density polyethylene resin, a film-grade high-density polyethylene resin, a wire-drawing-grade high-density polyethylene resin and a small-hollow-grade high-density polyethylene resin. Patent No. CN 103450540A discloses a composition of a 3PE anti-corrosion special material: 50-70 parts of pipe material, 30-50 parts of linear low-density polyethylene and 5-8 parts of special carbon black master batch containing antioxidant. The 3PE special material in the prior art is mainly suitable for corrosion prevention of steel pipes with the caliber of not more than 2 meters. Firstly, the high proportion of linear low density polyethylene such as 7042 in the formula composition ensures that the mechanical property of the 3PE special material cannot meet the requirement that the yield strength required in the latest national standard GB/T23257-2017 is more than 15 MPa; secondly, the latest national standard improves the requirement that the melt mass flow rate of a 3PE special material aged at 100 ℃ for 4800h is not more than 35 percent, and the common hindered phenol antioxidant used in the prior art has an antagonistic effect with carbon black; thirdly, the large caliber of the existing 3PE anticorrosion application puts forward the requirements of better processing performance, longer aging resistance and longer service life on the special material for 3 PE.
Disclosure of Invention
The invention provides an anti-aging 3PE special anti-corrosion material and a preparation method and application thereof, aiming at solving the problems that the yield strength of the special anti-corrosion material for 3PE is low, the long-term thermal aging resistance is poor, the application processability of the special anti-corrosion material for large-diameter steel pipes is deviated, and the like in the prior art. The special material has better mechanical strength and processing performance by matching the matrixes such as pipeline-grade polyethylene, I-type heat-resistant polyethylene, metallocene linear low-density polyethylene and the like. The ultraviolet aging resistance of the special material is improved by adding the carbon black with the particle size of less than 25nm and the hindered amine light stabilizer. By selecting the hindered phenol antioxidant with high molecular weight, precipitation resistance and high temperature resistance to be matched with the phosphorous acid antioxidant, the 3PE anti-corrosion special material is thermally aged for 7200h at 100 ℃, and the change rate of the melt mass flow rate of the product is not more than 35%. The special 3PE material for corrosion prevention is particularly suitable for corrosion prevention of large-caliber steel pipes with the diameter of more than 2 meters.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an anti-aging 3PE anti-corrosion special material, which comprises the following raw materials in parts by weight: 40-70 parts of pipeline-grade polyethylene, 10-30 parts of I-type heat-resistant polyethylene, 10-20 parts of metallocene linear low-density polyethylene, 5-7 parts of carbon black, 5-10 parts of ethylene and 5-10 parts of propylene copolymerized elastomer functional master batch.
The invention selects 40-70 parts of pipeline-grade polyethylene, 10-30 parts of I-type heat-resistant polyethylene and 10-20 parts of metallocene linear low-density polyethylene matrix for combination, mainly combines the special material of 3PE of the invention for corrosion prevention of large-caliber steel pipes, requires the special material of 3PE to have good processing performance and excellent mechanical strength, selects the pipeline-grade polyethylene as a subject material because the pipeline-grade polyethylene has good mechanical property and environmental stress cracking resistance, but the melt flow rate of the common pipeline-grade raw materials of PE80 and PE100 has poor fluidity (190 ℃, the melt flow rate tested by a 5kg weight is generally 0.2-0.4g/10min), and the melt flow rate index can not meet the requirement of more than or equal to 0.15g/10min in GB/T23257; in order to improve the comprehensive performance of the special material for 3PE, 10-30 parts of I-type heat-resistant polyethylene is selected and added, and the material is a pipeline-grade material produced by a metallocene catalyst, has excellent mechanical property and good processing fluidity (190 ℃, the melt flow rate is 0.2-0.8g/10min when a 2.16kg weight is tested); the special material for 3PE is selected from 10-20 parts of metallocene linear low-density polyethylene, so that the processability of the special material for 3PE is improved, the 3PE corrosion resistance is met, the special material is used for winding a large-diameter steel pipe, the special material can be easily wound on the surface of the steel pipe to form an outer corrosion-resistant layer with excellent appearance and comprehensive performance, the mechanical strength of the metallocene linear low-density polyethylene is high, and the special material obtained by matching the metallocene linear low-density polyethylene, the metallocene linear low-density polyethylene and the metallocene linear low-density polyethylene has high mechanical strength and good processability.
The second aspect of the invention provides a preparation method of an aging-resistant 3PE anti-corrosion special material, which comprises the following steps: mixing the pipeline-grade polyethylene, the I-type heat-resistant polyethylene, the metallocene linear low-density polyethylene, the carbon black master batch, the ethylene-propylene copolymerized elastomer functional master batch uniformly, extruding by a screw rod, and granulating to obtain the composite material.
The invention has the advantages of
(1) The invention utilizes the matching of the pipeline polyethylene, the I-type heat-resistant polyethylene, the metallocene linear low-density polyethylene and other matrixes to ensure that the special material has better mechanical strength and processing performance. The selected pipeline-grade polyethylene and the I-type heat-resistant polyethylene are mainly used, so that the good mechanical strength and the excellent environmental stress cracking resistance of the special material are ensured; the heat-resistant polyethylene I and the metallocene linear low-density polyethylene are selected to be matched, so that the special material has proper melt mass flow rate and good processability and ageing resistance, and the heat-resistant polyethylene I and the metallocene linear low-density polyethylene are polyethylene products prepared by metallocene catalysts, and have narrow molecular weight distribution and more excellent mechanical property.
(2) The ultraviolet aging resistance of the special material is improved by adding the carbon black with the particle size of less than 25nm and the hindered amine light stabilizer; by selecting the hindered phenol antioxidant with high molecular weight, precipitation resistance and high temperature resistance to be matched with the phosphorous acid antioxidant, the 3PE special material has more excellent long-term heat aging resistance.
(3) In the invention, the ethylene and propylene copolymerized elastomer of the ethylene and propylene copolymerized elastomer functional master batch can increase the toughness of the 3PE special material, avoid the special material from brittle cracking and improve the processability of the special material.
(4) In the invention, the functional master batch of the ethylene and propylene copolymerized elastomer contains the polysiloxane component, so that the processing viscosity can be reduced, and the brightness and the wear resistance of the appearance of the 3PE anticorrosive layer can be improved.
(5) In the invention, the ethylene and propylene copolymerized elastomer is added, and the propylene unit can generate degradation reaction under the long-term thermal aging action of the propylene monomer at 100 ℃, so that the molecular weight of the system is increased; under the long-term heat aging action of the polyethylene matrix of the special material at 100 ℃, the free radicals generated by the ethylene unit in the heat-oxygen aging process cause the crosslinking of polyethylene molecules, so that the melt mass flow rate of the product is reduced. The molecular weight increase caused by degradation reaction in the heat aging process of the propylene monomer can relieve the reduction of melt mass flow rate of the special material caused by thermal-oxygen crosslinking in the long-term heat aging process to a certain extent, and under the combined action of the high-temperature resistant hindered phenol antioxidant, the sulfur-containing hindered phenol antioxidant and other auxiliaries, the special material can be subjected to heat aging at 100 ℃ for 7200h, the change rate of the melt mass flow rate of the product is not more than 35 percent and is far higher than the 4800h aging requirement required in GB/T23257-2017.
(6) By combining the comprehensive properties of excellent mechanical property, good processing property, excellent long-term heat aging resistance and the like of the special material for 3PE, the steel pipeline using the special material for 3PE for corrosion prevention can provide better protection effect for a steel pipe, so that the service life is longer.
(7) The preparation method is simple, strong in practicability and easy to popularize.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
The special material for 3PE anticorrosive polyethylene comprises: 40-70 parts of pipeline-grade polyethylene, 10-30 parts of I-type heat-resistant polyethylene, 10-20 parts of metallocene linear low-density polyethylene, 5-7 parts of carbon black master batch, and 5-10 parts of ethylene and propylene copolymerized elastomer functional master batch.
In some embodiments, the pipe grade polyethylene is at least one of PE80 grade, PE100 grade high density polyethylene pipe stock.
In some embodiments, the heat resistant polyethylene type I is a heat resistant, medium density polyethylene type I prepared by a metallocene catalyst and has a melt mass flow rate of 0.2 to 0.8g/10min (190 ℃, 2.16kg weight).
In some embodiments, the metallocene linear low density polyethylene has a melt mass flow rate of 1 to 20g/min (190 ℃, 2.16kg weight).
In some embodiments, the carbon black matrix comprises 40% to 60% carbon black having a particle size of less than 25 nm.
In some embodiments, the ethylene-propylene copolymerized elastomer functional master batch consists of 6-10 parts of hindered phenol antioxidant, 2-4 parts of sulfur-containing hindered phenol antioxidant, 2-6 parts of phosphite antioxidant, 2-4 parts of hindered amine light stabilizer and 4-8 parts of polysiloxane;
in some embodiments, the ethylene, propylene copolymer elastomer is available under the trade name Vistamaxx TM 、VERSIFY TM The polypropylene-based elastomer of (1);
in some embodiments, the hindered phenolic antioxidant is at least one of 1,3, 5-trimethyl-2, 4, 6- (3, 5-di-tert-butyl-4-hydroxybenzyl) benzene (antioxidant 1330), 1,3, 5-tris (3, 5-di-tert-butyl-4-hydroxybenzyl) isocyanuric acid (antioxidant 3114);
in some embodiments, the sulfur-containing hindered phenolic antioxidant is bis (2-methyl-5-tert-butyl-4-hydroxyphenyl) sulfide;
in some embodiments, the phosphite antioxidant bis (2, 4-di-t-butylphenyl) pentaerythritol diphosphite (antioxidant 626);
in some embodiments, the hindered amine light stabilizer is at least one of polysuccinic acid (4-hydroxy-2, 2,6, 6-tetramethyl-1-piperidineethanol) ester (light stabilizer 622), poly { [6- [ (1,1,3, 3-tetramethylbutyl) amino ] ] -1,3, 5-triazine-2, 4-bis [ (2,2,6,6, -tetramethyl-piperidinyl) imino ] -1, 6-hexadiylene [ (2,2,6, 6-tetramethyl-4-piperidinyl) imino ] (light stabilizer 944);
in some embodiments, the polysiloxane has a molecular weight of 5000-.
A preparation method of a special material for 3PE anticorrosive polyethylene comprises the following steps: mixing pipeline polyethylene, I-type heat-resistant polyethylene, metallocene linear low-density polyethylene, carbon black master batch, ethylene and propylene copolymerized elastomer functional master batch, melting, blending and granulating.
The application of the special 3PE anticorrosive polyethylene material and/or the preparation method of the special 3PE anticorrosive polyethylene material in large-caliber steel pipelines.
The present invention is described in further detail below with reference to specific examples, which are intended to be illustrative of the invention and not limiting.
Example 1
Ethylene and propylene copolymerized elastomer functional masterbatch (M1) prepared from Vistamaxx TM 620274 parts, 8 parts of hindered phenol antioxidant 1330 (basf), 4 parts of sulfur-containing hindered phenol antioxidant 300 (Tokakou chemical industry Co., Ltd., Japan), 4 parts of phosphite antioxidant 626 (Linyitsufeng chemical Co., Ltd.), 2 parts of hindered amine light stabilizer 944 (basf) and 8 parts of polysiloxane with molecular weight of 10000, and the components are mixed uniformly and then extruded by a twin screw at 160 ℃ for granulation.
The special anticorrosive 3PE material is prepared from the following components in parts by weight in Table 1:
TABLE 1 preparation of 3PE specialty stocks from example 1
The information on the raw materials used in example 1 is as follows:
the pipeline material is PE80 grade pipeline material 2480, Qilu petrochemical;
PERT-I: PERT pipeline material type I QHM32F, Qilu petrochemical;
metallocene linear polyethylene: exceeded TM 3518CB, exxonmobil;
carbon black masterbatch: EM105G, carbon black content 42%, Shandong Macro tubes, Inc.;
the preparation method of the special 3PE antiseptic material comprises the following specific steps:
uniformly mixing the components by using a mixer according to the proportion, adding the mixture into a double-screw extruder, carrying out melt blending at 225 ℃, and granulating to obtain the special 3PE material for corrosion prevention.
3, testing and application of the PE anticorrosive special material:
the melt flow rate, the yield strength, the tensile strength, the crack nominal strain, the Vicat softening point, the oxidation induction time, the environmental stress crack resistance time and the 100 ℃ heat aging 7200h are tested according to GB/T23257-2017 (the melt mass flow rate is tested every 2400h, and the change rate after aging is calculated), and relevant data are shown in Table 4.
Selecting a dn2620 steel pipe, performing shot blasting on the steel pipe, spraying epoxy, winding a 3PE adhesive, and winding a 3PE special material, wherein the 3PE special material is extruded at a temperature of 225 ℃, and the appearance of the 3PE anticorrosive outer layer is shown in Table 4.
Example 2
Ethylene and propylene copolymerized elastomer functional master batch (M2) prepared from VERSIF TM 420077 parts, 6 parts of hindered phenol antioxidant 3114 (basf), 4 parts of sulfur-containing hindered phenol antioxidant 300 (Japanese Kokai chemical industry Co., Ltd.), 6 parts of phosphite antioxidant 626 (Linyitsufeng chemical Co., Ltd.), 3 parts of hindered amine light stabilizer 622 (basf) and 4 parts of polysiloxane with molecular weight 5000, and the components are mixed, evenly mixed and then subjected to twin-screw extrusion granulation at 160 ℃.
Ethylene and propylene copolymerized elastomer functional master batch (M3) prepared from VERSIF TM 430178 parts, 31145 parts of hindered phenol antioxidant, 1330 (basf) parts, 2 parts of sulfur-containing hindered phenol antioxidant 300 (Tokakou chemical industry Co., Ltd., Japan), 2 parts of phosphite antioxidant 626 (Linyi Sanfeng chemical Co., Ltd.), 1 part of hindered amine light stabilizer 622 (basf), 1 part of hindered amine light stabilizer 944 (basf) and 6 parts of polysiloxane with molecular weight of 5000, mixing, extruding and granulating by a double screw at 160 ℃.
Ethylene and propylene copolymerized elastomer functional masterbatch (M4) prepared from Vistamaxx TM 650281 parts, 31143 parts of hindered phenol antioxidant, 1330 (basf) parts, 2 parts of sulfur-containing hindered phenol antioxidant 300 (Tokakou chemical industry Co., Ltd., Japan), 2 parts of phosphite antioxidant 626 (Linyi Sanfeng chemical Co., Ltd.), 4 parts of hindered amine light stabilizer 944 (basf) and 5 parts of polysiloxane with molecular weight of 5000, and the components are mixed and evenly mixed, and then the mixture is subjected to 160 ℃ double-screw mixingAnd (4) extruding and granulating.
The 3PE anticorrosive special material comprises the following components in a table 2:
TABLE 2 preparation of 3PE specialty materials in example 2
The information on the raw materials used in example 2 is as follows:
the pipeline material is PE100 grade pipeline material 100S, Jilin petrochemical;
PERT-I: type i PERT pipe stock 3010, landification;
metallocene linear polyethylene: SP1520, mitsui japan;
carbon black masterbatch: EM105G, carbon black content 42%, Shandong Macro tubes, Inc.;
the preparation method of the special 3PE antiseptic material comprises the following specific steps:
uniformly mixing the components by using a mixer according to the proportion, adding the mixture into a double-screw extruder, carrying out melt blending at 210 ℃, and granulating to obtain the special 3PE material for corrosion prevention.
3, testing and application of the PE anticorrosive special material:
the melt flow rate, the yield strength, the tensile strength, the crack nominal strain, the Vicat softening point, the oxidation induction time, the environmental stress crack resistance time and the 100 ℃ heat aging 7200h are tested according to GB/T23257-2017 (the melt mass flow rate is tested every 2400h, and the change rate after aging is calculated), and relevant data are shown in Table 4.
Selecting a dn2620 steel pipe, performing shot blasting on the steel pipe, spraying epoxy, winding a 3PE adhesive, and winding a 3PE special material, wherein the 3PE special material is extruded at a temperature of 225 ℃, and the appearance of the 3PE anticorrosive outer layer is shown in Table 4.
Comparative example 1
Ethylene and propylene copolymerized elastomer functional master batch (M5) prepared from VERSIF TM 420072 parts of hindered phenol antioxidant 1010 (basf), 6 parts of phosphite antioxidant 626 (linyifeng chemical Co., Ltd.), 4 parts of hindered amine light stabilizer 622 (basf) and 4 parts of polysiloxane with molecular weight of 5000Mixing, extruding and granulating by a double screw at 160 ℃.
The ethylene-propylene copolymerized elastomer functional master batch (M6) consists of 704272 parts of linear polyethylene, 14 parts of hindered phenol antioxidant 1010 (basf), 6 parts of phosphite antioxidant 626 (Linyi Sanfeng chemical Co., Ltd.), 4 parts of hindered amine light stabilizer 622 (basf) and 4 parts of polysiloxane with the molecular weight of 5000, and is extruded and granulated by a double screw at 160 ℃ after being mixed and mixed.
The ethylene-propylene copolymer elastomer functional master batch (M7) consists of 704276 parts of linear polyethylene, 14 parts of hindered phenol antioxidant 1010 (basf), 6 parts of phosphite antioxidant 626 (linyi Sanfeng chemical Co., Ltd.) and 4 parts of hindered amine light stabilizer 622 (basf), and is subjected to double-screw extrusion granulation at 160 ℃ after being mixed uniformly.
The 3PE anticorrosive special material comprises the following components in a table 3:
TABLE 3 preparation of 3PE Special material in comparative example 1
The information on the raw materials used in comparative example 1 is as follows:
the pipeline material is PE100 grade pipeline material 100S, Jilin petrochemical;
PERT-I: type i PERT pipe stock 3010, landification;
metallocene linear polyethylene: SP1520, mitsui japan;
linear polyethylene: 7042, gilin petrochemical;
carbon black masterbatch: EM105G, carbon black content 42%, Shandong Macro tubes, Inc.;
the preparation method of the special 3PE antiseptic material comprises the following specific steps:
and uniformly mixing the components by using a mixer according to the proportion, adding the mixture into a double-screw extruder, carrying out melt blending at 210 ℃, and granulating to obtain the special 3PE material for corrosion prevention.
3, testing and application of the PE anticorrosive special material:
the melt flow rate, the yield strength, the tensile strength, the crack nominal strain, the Vicat softening point, the oxidation induction time, the environmental stress crack resistance time and the 100 ℃ heat aging 7200h are tested according to GB/T23257-2017 (the melt mass flow rate is tested every 2400h, and the change rate after aging is calculated), and relevant data are shown in Table 4.
Selecting a dn2620 steel pipe, performing shot blasting on the steel pipe, spraying epoxy, winding a 3PE adhesive, and winding a 3PE special material, wherein the 3PE special material is extruded at a temperature of 225 ℃, and the appearance of the 3PE anticorrosive outer layer is shown in Table 4.
TABLE 4 test and application Effect data for examples and comparative examples
According to the embodiment 1-embodiment 2, all indexes of the special 3PE material prepared by the invention meet the requirements of GB/T23257-2017, particularly, the change rate of the melt flow rate is still lower than 35% after the heat aging time is 7200 at 100 ℃, the special 3PE material is used for 2620 steel pipes, the coating is bright in appearance, and the problem of precipitation of auxiliaries such as an antioxidant is avoided. According to the comparison between 2C and 3A, when the PERT pipeline material and the metallocene linear polyethylene in the formula are replaced by the common linear polyethylene and the linear polyethylene in the formula has a large proportion, the yield strength and the Vicat softening point of the special material for 3PE cannot meet the standard requirements. According to the comparison of 2C with 3B and 3C, the common antioxidant 1010 is selected to replace the high-temperature-resistant antioxidant hindered phenol antioxidant and the antioxidant 300, even if the addition amount is high, the long-term heat aging resistance index still does not reach the standard, ethylene and propylene copolymerized elastomers are not used as a functional master batch matrix, the melt index change rate of the 3PE special material after heat aging resistance is larger, and the problems of precipitation and blooming are caused when the addition amount of the antioxidant is high and placed on a coating. As can be seen from the comparison of 2C and 3D, the polysiloxane matrix is not added to the functional master batch, and the brightness of the coating of the 3PE special material is poor.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The anti-aging 3PE anti-corrosion special material is characterized by comprising the following raw materials in parts by weight: 40-70 parts of pipeline-grade polyethylene, 10-30 parts of I-type heat-resistant polyethylene, 10-20 parts of metallocene linear low-density polyethylene, 5-7 parts of carbon black, 5-10 parts of ethylene and 5-10 parts of propylene copolymerized elastomer functional master batch.
2. The aging-resistant 3PE anti-corrosion special material as claimed in claim 1, wherein the pipeline grade polyethylene is at least one of PE80 grade and PE100 grade high density polyethylene pipeline material.
3. The special material for aging-resistant 3PE corrosion protection as claimed in claim 1, wherein the heat-resistant polyethylene type I is heat-resistant medium-density polyethylene type I prepared by metallocene catalyst, the melt mass flow rate is 0.2-0.8g/10min, and the test conditions are as follows: 190 ℃ and a weight of 2.16 kg.
4. The material as claimed in claim 1, wherein the metallocene linear low density polyethylene has a melt mass flow rate of 1-20g/min, a test condition of 190 ℃, and a weight of 2.16 kg.
5. The special anti-aging 3PE anti-corrosion material as claimed in claim 1, wherein the carbon black mother material contains 40% -60% of carbon black, and the particle size of the carbon black is less than 25 nm.
6. The special aging-resistant 3PE anti-corrosion material as claimed in claim 1, wherein the functional masterbatch of ethylene and propylene copolymerized elastomer comprises the following raw materials in parts by weight: 6-10 parts of hindered phenol antioxidant, 2-4 parts of sulfur-containing hindered phenol antioxidant, 2-6 parts of phosphite ester antioxidant, 2-4 parts of hindered amine light stabilizer and 4-8 parts of polysiloxane.
7. The aging-resistant 3PE corrosion prevention special material as claimed in claim 1, wherein the ethylene and propylene copolymer elastomer is under the trade name Vistamaxx TM 、VERSIFY TM The polypropylene-based elastomer of (1);
or the hindered phenol antioxidant is at least one of 1,3, 5-trimethyl-2, 4, 6- (3, 5-di-tert-butyl-4-hydroxybenzyl) benzene and 1,3, 5-tris (3, 5-di-tert-butyl-4-hydroxybenzyl) isocyanuric acid;
or, the sulfur-containing hindered phenol antioxidant is bis (2-methyl-5-tert-butyl-4-hydroxyphenyl) sulfide;
or, the phosphite antioxidant bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite;
or, the hindered amine light stabilizer is at least one of poly (4-hydroxy-2, 2,6, 6-tetramethyl-1-piperidineethanol) succinate, poly { [6- [ (1,1,3, 3-tetramethylbutyl) amino ] ] -1,3, 5-triazine-2, 4-bis [ (2,2,6,6, -tetramethyl-piperidyl) imino ] -1, 6-hexamethylene [ (2,2,6, 6-tetramethyl-4-piperidyl) imino ];
or, the polysiloxane has a molecular weight of 5000-.
8. The aging-resistant 3PE special anticorrosive material as claimed in claim 1, wherein the aging-resistant 3PE special anticorrosive material is used for a large-caliber steel pipe with a pipe diameter of more than 2 m.
9. The preparation method of the anti-aging 3PE anti-corrosion special material is characterized by comprising the following steps: mixing the pipeline-grade polyethylene, the I-type heat-resistant polyethylene, the metallocene linear low-density polyethylene, the carbon black master batch, the ethylene-propylene copolymerized elastomer functional master batch uniformly, extruding by a screw rod, and granulating to obtain the composite material.
10. The method for preparing the special anti-aging 3PE anti-corrosion material as claimed in claim 9, wherein the screw extrusion conditions are 190 ℃ and 250 ℃, and the screw rotation speed is 350 ℃ and 600 rpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210779050.9A CN115011022A (en) | 2022-07-04 | 2022-07-04 | Special anti-aging 3PE anti-corrosion material and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210779050.9A CN115011022A (en) | 2022-07-04 | 2022-07-04 | Special anti-aging 3PE anti-corrosion material and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115011022A true CN115011022A (en) | 2022-09-06 |
Family
ID=83078312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210779050.9A Pending CN115011022A (en) | 2022-07-04 | 2022-07-04 | Special anti-aging 3PE anti-corrosion material and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115011022A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115612424A (en) * | 2022-12-21 | 2023-01-17 | 广州鹿山新材料股份有限公司 | High-temperature-resistant adhesive and preparation method and application thereof |
| CN115895347A (en) * | 2022-09-16 | 2023-04-04 | 山东东宏管业股份有限公司 | Welding seam cracking resistant and low-temperature leveling polyethylene powder and preparation method and application thereof |
| CN115895347B (en) * | 2022-09-16 | 2024-05-10 | 山东东宏管业股份有限公司 | Weld cracking-resistant low-temperature leveling polyethylene powder and preparation method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101538384A (en) * | 2008-03-18 | 2009-09-23 | 上海上丰集团有限公司 | Polyethylene pipe workpiece for water supply |
| 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 |
| CN103665508A (en) * | 2012-09-19 | 2014-03-26 | 中国石油化工股份有限公司 | Polyethylene composite for drip irrigation pipes |
| CN104610814A (en) * | 2015-01-22 | 2015-05-13 | 广州鹿山新材料股份有限公司 | Polyethylene powder for anti-corrosive pipeline and preparation method for polyethylene powder |
-
2022
- 2022-07-04 CN CN202210779050.9A patent/CN115011022A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101538384A (en) * | 2008-03-18 | 2009-09-23 | 上海上丰集团有限公司 | Polyethylene pipe workpiece for water supply |
| 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 |
| CN103665508A (en) * | 2012-09-19 | 2014-03-26 | 中国石油化工股份有限公司 | Polyethylene composite for drip irrigation pipes |
| CN104610814A (en) * | 2015-01-22 | 2015-05-13 | 广州鹿山新材料股份有限公司 | Polyethylene powder for anti-corrosive pipeline and preparation method for polyethylene powder |
Non-Patent Citations (1)
| Title |
|---|
| 中国建筑材料检验认证中心，国家建筑材料测试中心组编: "印刷科技实用手册-第三分册 印刷器材篇", vol. 1, 中国轻工业出版社, pages: 3021 - 3022 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115895347A (en) * | 2022-09-16 | 2023-04-04 | 山东东宏管业股份有限公司 | Welding seam cracking resistant and low-temperature leveling polyethylene powder and preparation method and application thereof |
| CN115895347B (en) * | 2022-09-16 | 2024-05-10 | 山东东宏管业股份有限公司 | Weld cracking-resistant low-temperature leveling polyethylene powder and preparation method and application thereof |
| CN115612424A (en) * | 2022-12-21 | 2023-01-17 | 广州鹿山新材料股份有限公司 | High-temperature-resistant adhesive and preparation method and application thereof |
| CN115612424B (en) * | 2022-12-21 | 2023-03-21 | 广州鹿山新材料股份有限公司 | High-temperature-resistant adhesive and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110078996B (en) | Self-lubricating high-density polyethylene pipe for coal mine and preparation method thereof | |
| KR101178075B1 (en) | Polyethylene pipe fitting resins | |
| CN102850663B (en) | A kind of low temperature resistant polypropylene random copolymer material, preparation method and applications | |
| CN102731891A (en) | Thermoplastic oil-resistant halogen-free low-smoke flame-retardant polyolefin cable material and preparation method thereof | |
| CN104004271A (en) | Low-temperature-resistant polypropylene special material | |
| CN109456563B (en) | Special material for UHMWPE alloy compatibilization toughening modified polypropylene corrugated pipe and preparation method thereof | |
| CN103665508A (en) | Polyethylene composite for drip irrigation pipes | |
| CN102276913A (en) | Polypropylene material for MPP (modified polypropylene) jacking pipe | |
| CN115011022A (en) | Special anti-aging 3PE anti-corrosion material and preparation method and application thereof | |
| CN112795076A (en) | Special material for low-temperature-resistant polyethylene anticorrosive coating and preparation method and application thereof | |
| CN111187460A (en) | High-orientation and good-heat-aging-performance polyethylene composite material for hard pipes and preparation method thereof | |
| CN114752150B (en) | High-rigidity light-weight polypropylene composite material and preparation method and application thereof | |
| CN102295799B (en) | Polyethylene resin composition for pipe | |
| CN114437457A (en) | Polypropylene material and preparation method and application thereof | |
| CN106700193A (en) | Polyethylene composition | |
| EA016827B1 (en) | Use of polyethylene for providing low temperature pe topcoat | |
| CN102276891A (en) | Polyolefin resin composition for tubing | |
| CN114773836A (en) | Anti-fatigue high-gloss nylon heat insulation strip flame-retardant material and preparation method thereof | |
| CN102898715A (en) | Extremely temperature sensitive halogen-free and low smoke flame retardant plastic alloy for cables and preparation method thereof | |
| CN102453271B (en) | High-strength pressure-resistance polyethylene composition and preparation method thereof | |
| CN103160006B (en) | Special polyethylene resin composition for tubing | |
| AU2017218927A1 (en) | Bimodal polyethylene composition and pipe comprising the same | |
| CN111518391A (en) | Polyphenylene sulfide resin composition and preparation method and application thereof | |
| CN114133646A (en) | Special high-density polyethylene resin for pressure-resistant pipes and preparation method thereof | |
| CN116120666A (en) | High-flame-retardance modified polypropylene composite material and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |