CN103160172A - Curable anticorrosion coating for teflon/polyethylene lining and coating method of curable anticorrosion coating - Google Patents
Curable anticorrosion coating for teflon/polyethylene lining and coating method of curable anticorrosion coating Download PDFInfo
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Abstract
The invention discloses a curable anticorrosion coating for a teflon/polyethylene lining and a coating method of the curable anticorrosion coating. The anticorrosion coating is composed of a component A and a component B at a ratio of (1:9)-(5:5), wherein the component A comprises the following components in parts by weight: 40-70 parts of linear low-density polyethylene, 60-30 parts of linear high-density polyethylene, 10-30 parts of polar elastomer, 0.1-0.5 part of antioxidant, 10-30 parts of polyethylene graft and 0-5 parts of efficient heat conducting packing; and the component B comprises the following components in parts by weight: 30-70 parts of linear high-density polyethylene, 70-30 parts of linear low-density polyethylene, 0-30 parts of teflon powder, 0-10 parts of nonpolar elastomer, 0.1-1 part of cross linking agent and 0.2-1.5 parts of assistant cross linking agent. Basic resin adopted by the curable anticorrosion coating is a composite material of high-density polyethylene and linear low-density polyethylene, so that the enough cross linking efficiency is ensured, meanwhile, the reduction degree of crystallinity is greatly reduced to the maximum extent, and the cross-linked material has excellent rigidity and hardness and also has excellent chemical corrosion resistance and barrier property.
Description
Technical field
The present invention relates to a kind of pipeline and equipment for delivery of gas, liquid etc., be specifically related to a kind of high abrasion, high heat-resisting, heavy rot-resistant multiple curable type tetrafluoroethylene/polyethylene kind inside lining anti-corrosive pipeline and brushing method thereof.
Background technology
Along with expanding economy, day by day urgent and class improves constantly the every profession and trades such as chemical industry, oil, boats and ships, power plant, public utilities to requirements for anticorrosion such as pipeline, pumps, and the material antiseptic performance has also been proposed more and more higher requirement.In order to give pipeline more superior antiseptic property, once adopted plastics tubing to replace steel pipe, but in most of use occasions, because intensity, the stiffness of plastics tubing are inadequate, limited widely its use range.The composite metal plastic corrosion-proof pipe is at the good plastic coating protective membrane of steel pipe walls surface coating one deck; it has not only overcome the inadequate weakness of plastic tube intensity rigidity; and have the good wear resistance of plastics, preservative property, be difficult for forming the characteristics of dirt when carrying some media.Patent CN92239730.9 has announced the preparation method of the bonding anti-corrosion pipeline of a kind of steel plastic integral and container, and this pipeline and container are comprised of steel body and plastic layer, have advantages of steel mould bonding firmly, antiseptic property is good, can be used for the fields such as chemical industry, metallurgy.Yet, common monolayer thermoplastic corrosion-proof lining, for example the thermoplasticity rotation molding polyethylene, requiring harsh Application Areas (high temperature alkali corrosion, halogen are acid liquid corrosion), still can not meet the demands.Under height corrosion operating environment, must adopt the higher thermosetting material of antiseptic property.These materials generally adopted clinkery epoxy powder (FBE), coal tar enamel (CTE) and polyethylene composite structure (three layers of PE) in the past.The overall antiseptic property of these anticorrosion coatings can satisfy the requirement of oil-gas pipeline corrosion protection, and (the clinkery epoxy powder preservative coat is thinner, anti-physical abuse intensity difference but still have separately defective; Coal tar enamel is cold short, hot-fluid drops down and to the pollution that environment may cause, make its application surface more and more narrow; Polyethylene three-layer composite structure anticorrosive construction complex process).patent CN101240134A has announced a kind of epoxy modifying polyethylene bi-component powdery paints, crosslinking reaction is suitably occuring under environment in this material, form inierpeneirating network structure, has good antiseptic property, but the material viscosity that the method adopts is larger, epoxy resin particularly, in order to obtain good mechanical property, the general high viscosity epoxy that adopts, therefore tack of materials is large, be not suitable for roll moulding shaping technology, and, in this material preparation method, adding of inorganic particulate belongs to dry mixing process, disperse inhomogeneous, when being used for rotation molding, very easily be deposited between metallic conduit and inner lining material product, greatly reduce the cohesive force between inner lining material and metal, under subnormal ambient, easily cause shelling.Patent CN87100920A has announced the coating method of a kind of anti-corrosion wear resisting powder paint and this coating, with epoxy resin, nylon powder, Dyhard RU 100, glass-cermic powder are that raw material has prepared protective system, the effect that this coating has concurrently is anticorrosion, wear-resisting, strengthen, can be used for metallic conduit, anticorrosion in acid or alkali environment, but equally because tack of materials is larger, be more suitable for spraying coating process.
In addition, application number is that 201120454406.9,200520035161.0 and 200910198529.8 patent all adopts multilayer epoxy resin corrosion protection coating, the method first applies the last layer epoxy powder on the metallic conduit wall, and then applies the last layer sizing agent, wraps up at last one deck polyolefine.Such anti-corrosion pipeline adopts the multi-layer anticorrosion coating, has not only effectively improved the antiseptic property of pipeline, and has given material good cohesive force.But this kind material is because construction technology is loaded down with trivial details, and production control is more loaded down with trivial details, and cost is higher, and thinning phenomenon easily occurs pushing in the commissure, causes the tectum defective or produces hollowing, causes the galvanic protection dead band.In addition, these class methods are mainly used in outside pipeline anticorrosion, for the less pipeline of interior anticorrosion particularly bore, and inapplicable.
Simultaneously, due to the thermoplastics that remains polyolefins that directly contacts with corrosive medium in above multilayer epoxy/polyethylene powder coating, therefore, anticorrosion, heat-resisting, the wear resisting property of pipeline can not satisfy harsh operating environment.Under this background, in time develop and be applicable to small-bore, interior rot-resistant heavy anticorrosive material and technique is very important.
Be widely used in anticorrosion industry in order to obtain higher production efficiency, revolve in recent years to mould (rotation showering, rotating fluidized bed) technique, realized that the weight of inner-walls of duct and small-bore pipeline is anticorrosion.At present, state's inward turning moulds that the shared ratio of linear low density polyethylene is 93% in the middle of raw material.In above-mentioned high corrosion-resistant field, wear-resisting because linear low density polyethylene is corrosion-resistant, impermeable, the shortcoming of heat-resisting creep properties aspect has limited the application of linear low density polyethylene.
Crosslinked polyethylene rotational moulding material is with the superiority of high impact property, heat-resisting, resisting environmental stress and cracking, highly anticorrosion aspect, begins to be applied in the corrosion-proof lining aspect.At present, the research of crosslinked polyethylene mainly concentrates on the silane crosslinking technology aspect of linear low density polyethylene.Patent CN 1876706A has announced the preparation method of silane crosslinked polyethylene plastic, the method is widely used in anti-crack tube, CABLE MATERIALS aspect, but the material of this technological forming must pass through water-bath (or steam bath) aftertreatment, technical process and cost have been increased, and the degree of crosslinking of material is not high, can not satisfy the requirement of height rot-resistant.patent CN1524899A, CN1523052A is take linear low density polyethylene and Low Density Polyethylene compounding ingredient as base resin, adopt peroxide crosslinking technique to prepare crosslinked polyethylene rotational moulding PP Pipe Compound, the crosslinked polyethylene of this technique preparation has good shock resistance and chemical resistance, but two kinds of raw materials are all Low Density Polyethylenes, the corrosion resistance nature of raw material is reported to the leadship after accomplishing a task relatively, through after crosslinked, density further reduces, although material can the corrosion of dissolved property, but easily corroded by swelling property, in fact be not suitable for corrosion, the pipeline that barrier is had relatively high expectations, in addition, patent CN1039039A adopts the method for radiation to prepare the radial pattern crosslinked polyethylene, and material is used for the repaired mouth aspect of oil field gathering and transportation steel corrosion utilidor.Yet, relatively chemically crosslinked, radiation crosslinking efficient is very low, and the material degree of crosslinking is low, can't satisfy requirement for anticorrosion, and due to device-restrictive, is difficult to realize the interior anticorrosion of caliber long tube road.patent CN1524899A, CN1523052A is take linear low density polyethylene and Low Density Polyethylene compounding ingredient as base resin, adopt peroxide crosslinking technique to prepare crosslinked polyethylene rotational moulding PP Pipe Compound, the crosslinked polyethylene of this technique preparation has good shock resistance and chemical resistance, but two kinds of raw materials are all Low Density Polyethylenes, the corrosion resistance nature of raw material is relatively relatively poor, through after crosslinked, density further reduces, although material can the corrosion of dissolved property, but easily corroded by swelling property, be not suitable for corrosion, the pipeline that barrier is had relatively high expectations, and the pipeline wear resisting property of this method preparation improves little, the flyash that wear resisting property is being had relatively high expectations, silt, the grain transportation art, be not suitable for using.
Summary of the invention
Goal of the invention: the objective of the invention is in order to make up the deficiencies in the prior art, a kind of curable type tetrafluoroethylene/polyethylene kind inside lining anti-corrosive coating is provided, another object of the present invention has been to provide the brushing method of this protective system.
Technical scheme: a kind of curable type tetrafluoroethylene/polyethylene kind inside lining anti-corrosive coating, described protective system is comprised of A component and B component, A: B=1: 9-5: 5, wherein, the A component is comprised of each component of following parts by weight: linear low density polyethylene: 40-70 part, linear high-density polyethylene 60-30 part, polarity elastomerics: 10-30 part, oxidation inhibitor: 0.1-0.5 part; Polycthylene grafted thing 10-30 part; High-efficiency heat conduction filler 0-5 part; B component: linear high-density polyethylene: 30-70 part, linear low density polyethylene: 70-30 part, tetrafluoroethylene class powder: 0-30 part, nonpolar elastic body 0-10 part, linking agent: 0.1-1 part, additional crosslinker: 0.2-1.5 part.
As preferably, described linking agent is the peroxide type linking agent, is 2,5-dimethyl-2, two (t-butyl peroxy) hexanes of 5-, two 2 4-[two (2, the 4-dichloro-benzoyl) superoxide, peroxidation two (4-toluyl), dicumyl peroxide, two (tert-butyl hydroperoxide sec.-propyl) benzene, 1,1-di-t-butyl methyl-3,5,5-trimethyl-cyclohexane, 1,1-di-t-butyl methyl-3,5, one or more mixing in the 5-trimethyl-cyclohexane.
As preferably, described additional crosslinker is cyanacrylate, triallylcyanurate, one or more mixing in trimethylolpropane trimethacrylate.
As preferably, described oxidation inhibitor is the composite antioxidant that phosphite ester kind antioxidant and Hinered phenols antioxidant form, and wherein phosphite ester kind antioxidant and Hinered phenols antioxidant formed by weight 1: 0.3~1: 0.7.
As preferably, described grafts is one or more of Research of Grafting Malaic Anhydride Onto Polyethylene, polypropylene grafted maleic anhydride, maleic anhydride grafted ABS.
As preferably, described polarity elastomerics is one or more in ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, polyester type elastomer body.
As preferably, the nonpolar elastic body is SBS, SEP, one or several in SEBS.
As preferably, the high-efficiency heat conduction filler is nanometer silicon carbide, aluminium nitride, boron nitride, magnesium oxide, aluminum oxide, one or several in powdered graphite.
As preferably, polytetrafluoro class powder is tetrafluoroethylene, tetrafluoroethylene and hexafluoropropylene copolymer, ethene and TFE copolymer, one or several in polyvinylidene difluoride (PVDF), poly-trifluoro-ethylene.
In order to realize another object of the present invention, provide following technical scheme: the brushing method of a kind of curable type tetrafluoroethylene/polyethylene kind inside lining anti-corrosive coating: comprise the following steps:
1) with sandblast machine to pipe surface to be sprayed rust cleaning, the processing of deoiling;
2) steel pipe or equipment are placed in horizontally rotate or the device of bidirectional rotation when temperature reaches 220 ℃, beginning is injected protective system A component in pipeline, stopped 2-4 minute, after treating the whole meltings of powder, inject protective system B component in pipeline, simultaneously the rotating speed of pipeline is brought up to 40-80 rev/min, and continue to add 220-300 ℃, after treating the whole meltings of powder, be incubated 2-4 minute;
3) stopped heating leans on the self-heating of workpiece with the powder levelling, is cooled at last room temperature and gets final product.
Beneficial effect: the present invention compared to the prior art, base resin of the present invention is the matrix material of high density polyethylene(HDPE) and linear low density polyethylene, namely having guaranteed has enough cross-linking efficiencies, reduced to the full extent simultaneously the reduction of degree of crystallinity, make the material after crosslinked have excellent rigidity and hardness, have simultaneously excellent resistance to chemical attack and barrier.
Crosslinking process of the present invention is peroxide crosslinking technique, and the degree of crosslinking of matrix material is higher, corresponding impact with it, and anticorrosion and barrier excellence does not need follow-up steam or poach to process simultaneously, and technique is simple.Contain polarity elastomerics and high-efficiency heat conduction agent in the A component, can effectively improve cohesiveness and the resistance to cracking energy of coating, and coating institute received heat can be conducted to metal tube, improve the resistance toheat of coating.The B component belongs to the olefines thermosetting resin, compares epoxy resin and polyureas coating, has higher acid-proof alkaline, has added simultaneously the polytetrafluoro resinoid, and the frictional coefficient of material is little, and wear resisting property is high.
Embodiment
Embodiment 1
A kind of curable type tetrafluoroethylene/polyethylene kind inside lining anti-corrosive coating is comprised of A component and B component, wherein, the A component is comprised of each component of following parts by weight: linear low density polyethylene: 40 parts, 60 parts of linear high-density polyethylenes, the polarity elastomerics: 10 parts, oxidation inhibitor: 0.1 part; 10 parts of polycthylene grafted things; 1 part of high-efficiency heat conduction filler; B component: linear high-density polyethylene: 30 parts, linear low density polyethylene: 70 parts, tetrafluoroethylene class powder: 5 parts, 5 parts of nonpolar elastic bodies, linking agent: 1 part, additional crosslinker: 1.5 parts.in the present embodiment, the polarity elastomerics is ethylene-vinyl acetate copolymer, oxidation inhibitor is the composite antioxidant that phosphite ester kind antioxidant and Hinered phenols antioxidant form, wherein phosphite ester kind antioxidant and Hinered phenols antioxidant were by weight 1: 0.3, polycthylene grafted thing is Research of Grafting Malaic Anhydride Onto Polyethylene, the high-efficiency heat conduction filler is nanometer silicon carbide, tetrafluoroethylene class powder is tetrafluoroethylene-ethylene copolymer, the nonpolar elastic body is SBS, linking agent is 2, 5-dimethyl-2, two (t-butyl peroxy) hexanes of 5-, additional crosslinker is cyanacrylate.
High density polyethylene(HDPE) density is 0.95-0.97g/cm
3, melt flow rate (MFR) 5-10g/10min; Linear low density polyethylene density is 0.93-0.94g/cm
3, melt flow rate (MFR) 5-10g/10min.
Preparation method: the preparation of (1) A component: with linear low density polyethylene and high density polyethylene(HDPE) in advance drying treatment to moisture content lower than 600ppm, and weigh in proportion with polarity elastomerics, grafts and thermal conducting agent, fully mixed 5 minutes in homogenizer; Extruding pelletization in twin screw extruder then, extrusion temperature is 200 ℃, and screw speed is 300rpm, after extruding pelletization, abrasive dust 70 orders also are dried to moisture content lower than 600ppm with powder, and surface treatment 20 minutes is standby in the Surface Treatment with Plasma instrument at last;
(2) preparation of B component: with high density polyethylene(HDPE) and linear low density polyethylene in advance drying treatment to moisture content lower than 600ppm, abrasive dust 35 orders; Linking agent and additional crosslinker are weighed in proportion, and fully mixed 5 minutes in magnetic stirrer; With the linking agent, the additional crosslinker that mix with polyethylene, polytetrafluoro class powder and the nonpolar elastic body of abrasive dust are weighed in proportion in advance, and in mixed 5 minutes in moulding mixing machine, then at 280 ℃, after screw speed was the 200rpm extruding pelletization, abrasive dust 35 orders also were dried to moisture content lower than 600ppm with powder;
(3) preparation of composite coating: in proportion 2/8 take A component and B component after, be separately stored in packing.
Brushing method: with sandblast machine to pipe surface rust cleaning, the processing of deoiling; Steel pipe or equipment are placed in the device (but for the equipment of the complex structures such as tank body, elbow, small volume, rotational molding machine that parts are placed in bidirectional rotation) that horizontally rotates, when temperature reaches 220 ℃, beginning is injected protective system A component in pipeline, stop after 2 minutes, inject protective system B component in pipeline, simultaneously the rotating speed of pipeline is brought up to 40 rev/mins, and continue to add 290 ℃, after treating the whole meltings of powder, be incubated 3 minutes, stopped heating, lean on the self-heating of workpiece with the powder levelling afterwards, is cooled at last room temperature and gets final product.
Embodiment 2:
A kind of curable type tetrafluoroethylene/polyethylene kind inside lining anti-corrosive coating is comprised of A component and B component, wherein, the A component is comprised of each component of following parts by weight: linear low density polyethylene: 70 parts, 30 parts of linear high-density polyethylenes, the polarity elastomerics: 15 parts, oxidation inhibitor: 0.3 part; 20 parts of polycthylene grafted things; 5 parts of high-efficiency heat conduction fillers; B component: linear high-density polyethylene: 70 parts, linear low density polyethylene: 30 parts, tetrafluoroethylene class powder: 10 parts, 10 parts of nonpolar elastic bodies, linking agent: 0.8 part, additional crosslinker: 1.2 parts.In the present embodiment, the polarity elastomerics is ethylene-acrylic acid copolymer, oxidation inhibitor is the composite antioxidant that phosphite ester kind antioxidant and Hinered phenols antioxidant form, wherein phosphite ester kind antioxidant and Hinered phenols antioxidant were by weight 1: 0.7, polycthylene grafted thing is polypropylene grafted maleic anhydride, the high-efficiency heat conduction filler is aluminium nitride, tetrafluoroethylene class powder is ethene and TFE copolymer, the nonpolar elastic body is SEBS, linking agent is 2,5-dimethyl-2, two (t-butyl peroxy) hexanes of 5-, additional crosslinker is triallylcyanurate.
High density polyethylene(HDPE) density is 0.95-0.97g/cm
3, melt flow rate (MFR) 5-10g/10min; Linear low density polyethylene density is 0.93-0.94g/cm
3, melt flow rate (MFR) 5-10g/10min.
Preparation method: the preparation of (1) A component: with linear low density polyethylene and high density polyethylene(HDPE) in advance drying treatment to moisture content lower than 600ppm, and weigh in proportion with polarity elastomerics, grafts and thermal conducting agent, fully mixed 5 minutes in homogenizer; Extruding pelletization in twin screw extruder then, extrusion temperature is 200 ℃, and screw speed is 300rpm, after extruding pelletization, abrasive dust 70 orders also are dried to moisture content lower than 600ppm with powder, and surface treatment 20 minutes is standby in the Surface Treatment with Plasma instrument at last;
(2) preparation of B component: with high density polyethylene(HDPE) and linear low density polyethylene in advance drying treatment to moisture content lower than 600ppm, abrasive dust 35 orders; Linking agent and additional crosslinker are weighed in proportion, and fully mixed 5 minutes in magnetic stirrer; With the linking agent, the additional crosslinker that mix with polyethylene, polytetrafluoro class powder and the nonpolar elastic body of abrasive dust are weighed in proportion in advance, and in mixed 5 minutes in moulding mixing machine, then at 280 ℃, after screw speed was the 200rpm extruding pelletization, abrasive dust 35 orders also were dried to moisture content lower than 600ppm with powder;
(3) preparation of composite coating: in proportion 1/9 take A component and B component after, be separately stored in packing.
Brushing method: with sandblast machine to pipe surface rust cleaning, the processing of deoiling; Steel pipe or equipment are placed in the device (but for the equipment of the complex structures such as tank body, elbow, small volume, rotational molding machine that parts are placed in bidirectional rotation) that horizontally rotates, when temperature reaches 220 ℃, beginning is injected protective system A component in pipeline, stop after 4 minutes, inject protective system B component in pipeline, simultaneously the rotating speed of pipeline is brought up to 50 rev/mins, and continue to add 300 ℃, after treating the whole meltings of powder, be incubated 2 minutes, stopped heating, lean on the self-heating of workpiece with the powder levelling afterwards, is cooled at last room temperature and gets final product.
Embodiment 3
A kind of curable type tetrafluoroethylene/polyethylene kind inside lining anti-corrosive coating is comprised of A component and B component, wherein, the A component is comprised of each component of following parts by weight: linear low density polyethylene: 50 parts, 50 parts of linear high-density polyethylenes, the polarity elastomerics: 20 parts, oxidation inhibitor: 0.3 part; 20 parts of polycthylene grafted things; 4 parts of high-efficiency heat conduction fillers; B component: linear high-density polyethylene: 50 parts, linear low density polyethylene: 50 parts, tetrafluoroethylene class powder: 20 parts, 6 parts of nonpolar elastic bodies, linking agent: 0.5 part, additional crosslinker: 1.2 parts.In the present embodiment, the polarity elastomerics is ethylene-vinyl acetate copolymer, oxidation inhibitor is the composite antioxidant that phosphite ester kind antioxidant and Hinered phenols antioxidant form, wherein phosphite ester kind antioxidant and Hinered phenols antioxidant were by weight 1: 0.5, polycthylene grafted thing is Research of Grafting Malaic Anhydride Onto Polyethylene, the high-efficiency heat conduction filler is nanometer silicon carbide, tetrafluoroethylene class powder is tetrafluoroethylene, the nonpolar elastic body is SBS, linking agent is 2,5-dimethyl-2, two (t-butyl peroxy) hexanes of 5-, additional crosslinker is cyanacrylate.
High density polyethylene(HDPE) density is 0.95-0.97g/cm
3, melt flow rate (MFR) 5-10g/10min; Linear low density polyethylene density is 0.93-0.94g/cm
3, melt flow rate (MFR) 5-10g/10min.
Preparation method: the preparation of (1) A component: with linear low density polyethylene and high density polyethylene(HDPE) in advance drying treatment to moisture content lower than 600ppm, and weigh in proportion with polarity elastomerics, grafts and thermal conducting agent, fully mixed 5 minutes in homogenizer; Extruding pelletization in twin screw extruder then, extrusion temperature is 200 ℃, and screw speed is 300rpm, after extruding pelletization, abrasive dust 70 orders also are dried to moisture content lower than 600ppm with powder, and surface treatment 20 minutes is standby in the Surface Treatment with Plasma instrument at last;
(2) preparation of B component: with high density polyethylene(HDPE) and linear low density polyethylene in advance drying treatment to moisture content lower than 600ppm, abrasive dust 35 orders; Linking agent and additional crosslinker are weighed in proportion, and fully mixed 5 minutes in magnetic stirrer; With the linking agent, the additional crosslinker that mix with polyethylene, polytetrafluoro class powder and the nonpolar elastic body of abrasive dust are weighed in proportion in advance, and in mixed 5 minutes in moulding mixing machine, then at 280 ℃, after screw speed was the 200rpm extruding pelletization, abrasive dust 35 orders also were dried to moisture content lower than 600ppm with powder;
(3) preparation of composite coating: in proportion 5/5 take A component and B component after, be separately stored in packing.
Brushing method: with sandblast machine to pipe surface rust cleaning, the processing of deoiling; Steel pipe or equipment are placed in the device (but for the equipment of the complex structures such as tank body, elbow, small volume, rotational molding machine that parts are placed in bidirectional rotation) that horizontally rotates, when temperature reaches 220 ℃, beginning is injected protective system A component in pipeline, stop after 3 minutes, inject protective system B component in pipeline, simultaneously the rotating speed of pipeline is brought up to 60 rev/mins, and continue to add 300 ℃, after treating the whole meltings of powder, be incubated 4 minutes, stopped heating, lean on the self-heating of workpiece with the powder levelling afterwards, is cooled at last room temperature and gets final product.
Embodiment 4:
Substantially the same manner as Example 1, difference is that the polarity elastomerics is the polyester type elastomer body.
Embodiment 5:
Substantially the same manner as Example 1, difference is that the high-efficiency heat conduction filler is magnesium oxide or aluminum oxide.
Embodiment 6:
Substantially the same manner as Example 1, difference be the A component wherein, the A component is comprised of each component of following parts by weight: linear low density polyethylene: 60 parts, 40 parts of linear high-density polyethylenes, the polarity elastomerics: 30 parts, oxidation inhibitor: 0.5 part; 30 parts of polycthylene grafted things; 5 parts of high-efficiency heat conduction fillers; B component: linear high-density polyethylene: 60 parts, linear low density polyethylene: 40 parts, tetrafluoroethylene class powder: 30 parts, linking agent: 0.1 part, additional crosslinker: 0.2 part.
Embodiment 7:
Substantially the same manner as Example 1, difference be the A component wherein, the A component is comprised of each component of following parts by weight: linear low density polyethylene: 50 parts, 50 parts of linear high-density polyethylenes, the polarity elastomerics: 25 parts, oxidation inhibitor: 0.3 part; 25 parts of polycthylene grafted things; B component: linear high-density polyethylene: 50 parts, linear low density polyethylene: 50 parts, linking agent: 0.7 part, additional crosslinker: 1 part.
Embodiment 8:
Substantially the same manner as Example 1, difference is that polytetrafluoro class powder is tetrafluoroethylene and hexafluoroethylene multipolymer.
For further proof beneficial effect of the present invention: enumerate following test example: as table one:
Table 1 double layer anticorrosive coating property data
Claims (10)
1. curable type tetrafluoroethylene/polyethylene kind inside lining anti-corrosive coating, it is characterized in that: described protective system is comprised of A component and B component, A: B=1: 9-5: 5, wherein, the A component is comprised of each component of following parts by weight: linear low density polyethylene: 40-70 part, linear high-density polyethylene 60-30 part, polarity elastomerics: 10-30 part, oxidation inhibitor: 0.1-0.5 part; Polycthylene grafted thing 10-30 part; High-efficiency heat conduction filler 0-5 part; B component: linear high-density polyethylene: 30-70 part, linear low density polyethylene: 70-30 part, tetrafluoroethylene class powder: 0-30 part, nonpolar elastic body 0-10 part, linking agent: 0.1-1 part, additional crosslinker: 0.2-1.5 part.
2. curable type tetrafluoroethylene as claimed in claim 1/polyethylene kind inside lining anti-corrosive coating, it is characterized in that: described linking agent is the peroxide type linking agent, be 2,5-dimethyl-2, two (t-butyl peroxy) hexanes of 5-, two 2 4-[two (2, the 4-dichloro-benzoyl) superoxide, peroxidation two (4-toluyl), dicumyl peroxide, two (tert-butyl hydroperoxide sec.-propyl) benzene, 1,1-di-t-butyl methyl-3,5, the 5-trimethyl-cyclohexane, 1,1-di-t-butyl methyl-3,5, one or more mixing in the 5-trimethyl-cyclohexane.
3. curable type tetrafluoroethylene as claimed in claim 1/polyethylene kind inside lining anti-corrosive coating, it is characterized in that: described additional crosslinker is cyanacrylate, triallylcyanurate, one or more mixing in trimethylolpropane trimethacrylate.
4. curable type tetrafluoroethylene as claimed in claim 1/polyethylene kind inside lining anti-corrosive coating, it is characterized in that: described oxidation inhibitor is the composite antioxidant that phosphite ester kind antioxidant and Hinered phenols antioxidant form, and wherein phosphite ester kind antioxidant and Hinered phenols antioxidant formed by weight 1: 0.3~1: 0.7.
5. curable type tetrafluoroethylene as claimed in claim 1/polyethylene kind inside lining anti-corrosive coating is characterized in that: described grafts is one or more of Research of Grafting Malaic Anhydride Onto Polyethylene, polypropylene grafted maleic anhydride, maleic anhydride grafted ABS.
6. curable type heat-resistant, wear-resistant polytetrafluoro as claimed in claim 1/polyethylene kind inside lining anti-corrosive coating, it is characterized in that: described polarity elastomerics is one or more in ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, polyester type elastomer body.
7. curable type heat-resistant, wear-resistant tetrafluoroethylene as claimed in claim 1/polyethylene kind inside lining anti-corrosive coating, it is characterized in that: the nonpolar elastic body is SBS, SEP, one or several in SEBS.
8. curable type heat-resistant, wear-resistant tetrafluoroethylene as claimed in claim 1/polyethylene kind inside lining anti-corrosive coating, it is characterized in that: the high-efficiency heat conduction filler is nanometer silicon carbide, aluminium nitride, boron nitride, magnesium oxide, aluminum oxide, one or several in powdered graphite.
9. curable type heat-resistant, wear-resistant tetrafluoroethylene as claimed in claim 1/polyethylene kind inside lining anti-corrosive coating, it is characterized in that: polytetrafluoro class powder is tetrafluoroethylene, tetrafluoroethylene and hexafluoropropylene copolymer, ethene and TFE copolymer, one or several in polyvinylidene difluoride (PVDF), poly-trifluoro-ethylene.
10. the brushing method of curable type tetrafluoroethylene/polyethylene kind inside lining anti-corrosive coating: it is characterized in that: comprise the following steps:
1) with sandblast machine to pipe surface to be sprayed rust cleaning, the processing of deoiling;
2) steel pipe or equipment are placed in horizontally rotate or the device of bidirectional rotation when temperature reaches 220 ℃, beginning is injected protective system A component in pipeline, stopped 2-4 minute, after treating the whole meltings of powder, inject protective system B component in pipeline, simultaneously the rotating speed of pipeline is brought up to 40-80 rev/min, and continue to add 220-300 ℃, after treating the whole meltings of powder, be incubated 2-4 minute;
3) stopped heating leans on the self-heating of workpiece with the powder levelling, is cooled at last room temperature and gets final product.
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