CN114250016A - Polyethylene anticorrosive powder and preparation method and application of polyethylene anticorrosive powder and coated steel pipe - Google Patents
Polyethylene anticorrosive powder and preparation method and application of polyethylene anticorrosive powder and coated steel pipe Download PDFInfo
- Publication number
- CN114250016A CN114250016A CN202111646213.8A CN202111646213A CN114250016A CN 114250016 A CN114250016 A CN 114250016A CN 202111646213 A CN202111646213 A CN 202111646213A CN 114250016 A CN114250016 A CN 114250016A
- Authority
- CN
- China
- Prior art keywords
- polyethylene
- parts
- powder
- steel pipe
- rosin
- 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
- -1 Polyethylene Polymers 0.000 title claims abstract description 55
- 239000004698 Polyethylene Substances 0.000 title claims abstract description 51
- 239000000843 powder Substances 0.000 title claims abstract description 51
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 50
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 35
- 239000010959 steel Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 30
- 239000011248 coating agent Substances 0.000 claims abstract description 24
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims abstract description 21
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims abstract description 21
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000945 filler Substances 0.000 claims abstract description 17
- 229920002367 Polyisobutene Polymers 0.000 claims abstract description 15
- 229920002301 cellulose acetate Polymers 0.000 claims abstract description 12
- 238000005536 corrosion prevention Methods 0.000 claims abstract description 12
- 239000004712 Metallocene polyethylene (PE-MC) Substances 0.000 claims abstract description 11
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 11
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 11
- 229920000642 polymer Polymers 0.000 claims abstract description 11
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 9
- 239000004593 Epoxy Substances 0.000 claims description 8
- 238000005260 corrosion Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 6
- 239000004595 color masterbatch Substances 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 claims description 4
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 3
- 239000007822 coupling agent Substances 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 239000006223 plastic coating Substances 0.000 claims description 3
- 125000000218 acetic acid group Chemical group C(C)(=O)* 0.000 claims description 2
- 239000003963 antioxidant agent Substances 0.000 claims description 2
- 230000003078 antioxidant effect Effects 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 229920001577 copolymer Polymers 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- 239000010445 mica Substances 0.000 claims description 2
- 229910052618 mica group Inorganic materials 0.000 claims description 2
- 238000006116 polymerization reaction Methods 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 239000010456 wollastonite Substances 0.000 claims description 2
- 229910052882 wollastonite Inorganic materials 0.000 claims description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerol Natural products OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims 2
- 230000002401 inhibitory effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 12
- 230000032683 aging Effects 0.000 abstract description 6
- 239000000853 adhesive Substances 0.000 abstract description 5
- 230000001070 adhesive effect Effects 0.000 abstract description 5
- 239000002131 composite material Substances 0.000 abstract description 5
- 229920003023 plastic Polymers 0.000 abstract description 5
- 239000004033 plastic Substances 0.000 abstract description 5
- 229920006221 acetate fiber Polymers 0.000 abstract description 3
- 235000013350 formula milk Nutrition 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 235000020610 powder formula Nutrition 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- HBKBEZURJSNABK-MWJPAGEPSA-N 2,3-dihydroxypropyl (1r,4ar,4br,10ar)-1,4a-dimethyl-7-propan-2-yl-2,3,4,4b,5,6,10,10a-octahydrophenanthrene-1-carboxylate Chemical compound C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C(=O)OCC(O)CO HBKBEZURJSNABK-MWJPAGEPSA-N 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000007766 curtain coating Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007723 die pressing method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 235000010985 glycerol esters of wood rosin Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
- C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D123/04—Homopolymers or copolymers of ethene
- C09D123/06—Polyethene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
- B05D7/146—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies to metallic pipes or tubes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- 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
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- 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
- C08L2207/066—LDPE (radical process)
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention belongs to the field of corrosion prevention, and relates to a preparation method and application of polyethylene anticorrosive powder and a coated steel pipe thereof, wherein the polyethylene anticorrosive powder comprises the following raw materials in parts by weight: 40-60 parts of low-density polyethylene, 10-30 parts of metallocene polyethylene, 2-10 parts of polyisobutylene, 3-15 parts of cellulose acetate, 2-10 parts of activated modified filler, 1-5 parts of rosin polymer, 1-4 parts of color master or toner and 0.1-2 parts of auxiliary agent. According to the invention, the thermal expansion coefficient of the polyethylene material is effectively reduced by adding the filler and the acetate fiber, the hardness and the adhesive force of the coating are improved, the toughness and the aging resistance of the coating are improved by adding the polyisobutylene, and the coating can be effectively applied to the corrosion prevention of the plastic-coated composite steel pipe with the thickness of more than 2600mm through the formula combination.
Description
Technical Field
The invention belongs to the field of corrosion prevention, and particularly relates to polyethylene corrosion prevention powder and a preparation method and application of a coated steel pipe 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 plastic-coated composite steel pipe has various corrosion prevention modes, including polyethylene powder, epoxy powder, 8710, epoxy petroleum asphalt and the like, different corrosion prevention modes have different advantages and disadvantages, and the polyethylene powder plastic-coated composite steel pipe has good adhesive force, better coating protection capability, green and environment-friendly processing process, low corrosion prevention cost and wide acceptance of engineering projects. However, for the large-caliber anti-corrosion steel pipe, particularly the caliber of more than 2600mm, the coating cracking condition is easy to occur in the low-temperature application process due to the inconsistent expansion coefficients when the large-caliber anti-corrosion steel pipe, particularly the steel pipe with the caliber of more than 2600mm, is used for the anti-corrosion of the large-caliber anti-corrosion steel pipe due to the fact that the conventional polyethylene thermal expansion coefficient is 10 multiplied by 10^ -5 (DEG C-1), the steel thermal expansion coefficient is 12 multiplied by 10^ -6 (DEG C-1) and the application temperature is-30 to 40 ℃; and secondly, the forming temperature of the polyethylene powder reaches 200-220 ℃, the large-diameter steel pipe has high heat energy due to the large diameter and the thick wall, the temperature of the steel pipe can be reduced to room temperature for a long time after coating, and the contact surface of the polyethylene coating and the steel pipe needs to be subjected to long-time high temperature by hand, so that the coating is easy to age and embrittle.
At present, POE and the like are added into a polyethylene powder formula to reduce low-temperature brittleness and increase formula toughness, but the mode can cause that a polyethylene powder coating is softer and is easy to scratch or knock to damage so as to cause the corrosion-resistant coating to be damaged, so that the corrosion resistance is invalid, the design expectation cannot be reached, meanwhile, the soft material is not easy to be processed into a regular powder material, and the processing difficulty is higher.
Disclosure of Invention
In order to overcome the problems, the invention provides polyethylene anticorrosive powder and a preparation method and application of a coated steel pipe thereof.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the invention provides a polyethylene anticorrosive powder, which comprises the following raw materials in parts by weight: 40-60 parts of low-density polyethylene, 10-30 parts of metallocene polyethylene, 2-10 parts of polyisobutylene, 3-15 parts of cellulose acetate, 2-10 parts of activated modified filler, 1-5 parts of rosin polymer, 1-4 parts of color master or toner and 0.1-3 parts of auxiliary agent.
The invention provides a method for effectively reducing the thermal expansion coefficient of a polyethylene material by adding a modified nano filler, the thermal expansion coefficient of the material is reduced and the hardness of the material is improved due to the dimensional stability of the filler, the molecular chain movement in the interfacial region of the polymer is limited in the filled polymer, but the corresponding toughness of the material is also reduced, the toughness and the ageing resistance of a coating are improved by adding polyisobutylene, the hardness and the adhesive force of the coating can be improved by adding cellulose acetate, the powder forming rate is improved, and the formula combination can be effectively applied to the corrosion prevention of a plastic-coated composite steel pipe with the thickness of more than 2600 mm.
In a second aspect of the present invention, there is provided a method for preparing a polyethylene anticorrosive powder, comprising:
adding the activated modified filler, polyisobutylene, cellulose acetate and rosin polymer into an internal mixer or a double-rotor internal mixer, uniformly mixing, and then extruding and granulating by a single/double-screw extruder to prepare functional master batches;
mixing low-density polyethylene, metallocene polyethylene, the functional master batch, color master batch and an auxiliary agent, and then mixing, extruding and granulating by a double-screw extruder to prepare polyethylene granules;
and grinding the polyethylene particles into powder to prepare polyethylene powder.
In a third aspect of the present invention, there is provided the above mentioned polyethylene anticorrosive powder coated steel pipe process, including:
removing grease and dirt on the surface of the steel pipe to be treated, and removing rust on the steel pipe;
heating the steel pipe, then coating polyethylene powder on the outer wall of the steel pipe, and coating epoxy powder or epoxy paint on the inner wall of the steel pipe or not performing corrosion prevention;
wherein, the polyethylene powder coating process comprises the following steps: the fluidized bed process or the flow coating process, and the plastic coating temperature is 180-200 ℃.
The invention has the beneficial effects that:
(1) according to the invention, the thermal expansion coefficient of the polyethylene material is effectively reduced by adding the filler and the acetate fiber, the hardness and the adhesive force of the coating are improved, the toughness and the aging resistance of the coating are improved by adding the polyisobutylene, and the coating can be effectively applied to the corrosion prevention of the plastic-coated composite steel pipe with the thickness of more than 2600mm through the formula combination.
(2) The preparation method is simple, low in cost, universal and easy for large-scale production.
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.
Polyethylene powder formula:
40-60 parts of low-density polyethylene (LDPE);
10-30 parts of metallocene polyethylene (mPE);
polyisobutylene (PIB) 2-10;
cellulose Acetate (CA) 3-15;
2-10 parts of activated modified filler;
1-5 parts of rosin polymer;
1-4 of color master or toner;
0.1-2 of auxiliary agent.
In some embodiments, the low density polyethylene melt index is 5 to 100g/10 min;
in some embodiments, the polyisobutylene has a polymerization degree of 2000-50000;
in some embodiments, the metallocene polyethylene is an ethylene octene copolymer with a melt index of 2 to 30g/10 min;
in some embodiments, the cellulose acetate has an acetyl content of 25% to 40%;
in some embodiments, the activated and modified filler is calcium carbonate, silica micropowder, mica powder, wollastonite powder and the like which are activated by a titanate coupling agent, and the particle size of the activated and modified filler is less than 1 um;
in some embodiments, the rosin polymer is rosin, polymerized rosin, maleated rosin, acrylus rosin, glycerol ester of rosin, pentaerythritol ester of rosin;
in some embodiments, the auxiliary agent is an antioxidant compounded with a light stabilizer.
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.
In the following examples, the method for testing the retention of heat aged toughness is as follows:
preparing polyethylene powder into a tensile sample strip by a mode of die pressing, and testing the elongation of the tensile sample strip to be A;
placing the polyethylene powder in an oven, carrying out heat aging at 200 ℃ for 1 hour, and then preparing a tensile sample strip by a mould pressing mode to test the elongation rate to be B;
retention of heat aging toughness (a-B)/a 100%.
Example 1:
the powder process flow is as follows:
s1, mixing filler powder and a titanate coupling agent (commercially available) according to the weight ratio of 1000: 1, weighing the materials in proportion, adding the materials into a high-speed stirrer at the temperature of 80 ℃, stirring the materials for 30 minutes, cooling and discharging the materials after stirring to obtain activated modified filler;
s2, mixing the activated modified filler, polyisobutylene, cellulose acetate and rosin polymer according to a ratio of 2:2: 3: 1, adding the mixture into an internal mixer or a double-rotor internal mixer, uniformly mixing, and then extruding and granulating by a single/double-screw extruder to prepare functional master batches;
s3, mixing the low-density polyethylene, the metallocene polyethylene, the functional master batch, the color master batch and the auxiliary agent in a high-speed mixer according to the proportion, and then mixing, extruding and granulating the mixture by a double-screw extruder to prepare polyethylene particles;
s4, mixing polyethylene particles with a grinding aid, and grinding the mixture into powder by a shear type grinding machine to prepare polyethylene powder;
the steel pipe coating process flow is as follows:
s1, removing grease and dirt on the surface of a steel pipe to be treated, and removing rust on the steel pipe;
s2, heating the steel pipe, then coating polyethylene powder on the outer wall of the steel pipe, and coating epoxy powder or epoxy paint on the inner wall or not performing corrosion prevention;
the polyethylene powder coating process comprises a fluidized bed process or a curtain coating process, and the plastic coating temperature is 180 ℃.
The amounts of the raw materials added in the respective examples are shown in Table 1.
The specific information of each raw material is as follows:
LDPE: yanshan petrochemical 1C7A (melt flow rate 2.16kg, 190 ℃ 7g/10 min);
2, mPE: exxonmobil 4518PA (melt flow rate 2.16kg, 190 ℃ C. 4.5g/10 min);
3, PIB: HRD-350 (molecular weight 35000);
4, CA: issmann chemical 530A;
5. maleated rosin: jiayu chemical maleated rosin 115;
6. color master batch: PE color master batch of Shandong Luyan;
7. auxiliary agent: beijing is a very chemical compound stabilizer 215.
TABLE 1
According to the embodiment, the thermal expansion coefficient of the polyethylene material is effectively reduced by adding the filler and the acetate fiber, the hardness and the adhesive force of the coating can be improved, and the toughness and the aging resistance of the coating are improved by adding the polyisobutylene.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments, or equivalents thereof. 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 polyethylene anticorrosive powder is characterized by comprising the following raw materials in parts by weight: 40-60 parts of low-density polyethylene, 10-30 parts of metallocene polyethylene, 2-10 parts of polyisobutylene, 3-15 parts of cellulose acetate, 2-10 parts of activated modified filler, 1-5 parts of rosin polymer, 1-4 parts of color master or toner and 0.1-2 parts of auxiliary agent.
2. The polyethylene anticorrosive powder according to claim 1, wherein the low density polyethylene melt index is 5 to 100g/10 min.
3. The polyethylene anticorrosive powder according to claim 1, wherein the polymerization degree of polyisobutylene is 2000-50000.
4. The polyethylene anticorrosive powder according to claim 1, wherein the metallocene polyethylene is an ethylene-octene copolymer, and the melt index is 2 to 30g/10 min.
5. The polyethylene anticorrosive powder according to claim 1, wherein the cellulose acetate has an acetyl content of 25% to 40%.
6. The polyethylene anticorrosive powder according to claim 1, wherein the activated and modified filler is calcium carbonate, silica micropowder, mica powder or wollastonite powder activated by a coupling agent, and preferably has a particle size of less than 1 um.
7. The polyethylene corrosion inhibiting powder of claim 1 wherein the rosin polymer is rosin, polymerized rosin, maleated rosin, acryl rosin, rosin glycerol ester, or rosin pentaerythritol ester.
8. The polyethylene anticorrosive powder according to claim 1, wherein the auxiliary agent is an antioxidant.
9. A preparation method of polyethylene anticorrosion powder is characterized by comprising the following steps:
adding the activated modified filler, polyisobutylene, cellulose acetate and rosin polymer into an internal mixer or a double-rotor internal mixer, uniformly mixing, and then extruding and granulating by a single/double-screw extruder to prepare functional master batches;
mixing low-density polyethylene, metallocene polyethylene, the functional master batch, color master batch and an auxiliary agent, and then mixing, extruding and granulating by a double-screw extruder to prepare polyethylene granules;
and grinding the polyethylene particles into powder to prepare polyethylene powder.
10. A process for coating a steel pipe with the polyethylene corrosion protection powder according to any one of claims 1 to 8, comprising:
removing grease and dirt on the surface of the steel pipe to be treated, and removing rust on the steel pipe;
heating the steel pipe, then coating polyethylene powder on the outer wall of the steel pipe, and coating epoxy powder or epoxy paint on the inner wall of the steel pipe or not performing corrosion prevention;
wherein, the polyethylene powder coating process comprises the following steps: the fluidized bed process or the flow coating process, and the plastic coating temperature is 180-200 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111646213.8A CN114250016A (en) | 2021-12-29 | 2021-12-29 | Polyethylene anticorrosive powder and preparation method and application of polyethylene anticorrosive powder and coated steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111646213.8A CN114250016A (en) | 2021-12-29 | 2021-12-29 | Polyethylene anticorrosive powder and preparation method and application of polyethylene anticorrosive powder and coated steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114250016A true CN114250016A (en) | 2022-03-29 |
Family
ID=80795697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111646213.8A Pending CN114250016A (en) | 2021-12-29 | 2021-12-29 | Polyethylene anticorrosive powder and preparation method and application of polyethylene anticorrosive powder and coated steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114250016A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102277042A (en) * | 2011-07-08 | 2011-12-14 | 上海邦中新材料有限公司 | Polyethylene powder coating used for anti-corrosion steel pipe and preparation method thereof |
-
2021
- 2021-12-29 CN CN202111646213.8A patent/CN114250016A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102277042A (en) * | 2011-07-08 | 2011-12-14 | 上海邦中新材料有限公司 | Polyethylene powder coating used for anti-corrosion steel pipe and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 谢荣化: "《塑料购销手册》", 31 May 1994, 中国物资出版社 * |
| 钱立军等: "《高分子材料》", 31 August 2020, 中国轻工业出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101580680B (en) | Crosslinkable polyethylene hot-melt adhesive composition and preparation method and application thereof | |
| CN104610814A (en) | Polyethylene powder for anti-corrosive pipeline and preparation method for polyethylene powder | |
| CN108239330A (en) | A kind of automotive line irradiated crosslinking low-smoke and halogen-free flame retardant material and preparation method thereof | |
| CN101805424B (en) | Silane crosslinked polyethylene special-purpose material for internal bladder of electric water heater | |
| CN109354774A (en) | Polypropylene toughening heat-preserving complex material and preparation method thereof | |
| CN110358194B (en) | Antistatic polypropylene composite material and preparation method thereof | |
| CN105153536A (en) | High strength corrosion resistant modified FRPP pipe and preparation method thereof | |
| CN106832698A (en) | A kind of chlorinated polyvinyl chloride tubes composition and tubing preparation method | |
| CN104292391A (en) | Melting production method for unsaturated anhydride grafted chlorinated polyethylene | |
| CN111849089B (en) | Super-hydrophobic self-cleaning PVC composite material and preparation method thereof | |
| TW201412855A (en) | Dynamic crosslinked modified heat-proof polyethylene material and preparation method and application thereof | |
| JPH0273844A (en) | Resin composition | |
| CN114250016A (en) | Polyethylene anticorrosive powder and preparation method and application of polyethylene anticorrosive powder and coated steel pipe | |
| CN112300492A (en) | Spraying-free polypropylene material capable of microwave self-repairing and preparation method thereof | |
| CN112143070A (en) | Pipe reinforcing master batch and preparation method thereof | |
| CN106947165A (en) | A kind of high strength heat resistant polypropylene plastics tubing and preparation method thereof | |
| CN112341686B (en) | Environment-friendly cosmetic hose with high PCR content and manufacturing process thereof | |
| CN108384089B (en) | Modified high-density polyethylene material and preparation method thereof | |
| CN107245211B (en) | A kind of Anti-scratching blast plastic matrix and preparation method | |
| CN111440398B (en) | Special material for ion-crosslinked polyvinyl chloride protection tube | |
| CN104558869A (en) | Polybutylene-1 material filled with calcium carbonate after surface treatment with coupling agent, and preparation method of polybutylene-1 material | |
| CN114656690A (en) | Modified basalt flake material, preparation method thereof and HDPE double-wall corrugated pipe containing modified basalt flake material | |
| CN114409987A (en) | High-temperature-resistant ultrahigh molecular weight polyethylene composite pipe and preparation method thereof | |
| CN110283439B (en) | Production process of glass fiber modified PE pipe | |
| CN112175312A (en) | Environment-friendly stabilizer applied to transparent PVC (polyvinyl chloride) hard product |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220329 |