CN110396377A - A kind of pyrocondensation anti-corrosion material of the glue film containing single-component epoxy and its preparation method and application - Google Patents
A kind of pyrocondensation anti-corrosion material of the glue film containing single-component epoxy and its preparation method and application Download PDFInfo
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- CN110396377A CN110396377A CN201910626807.9A CN201910626807A CN110396377A CN 110396377 A CN110396377 A CN 110396377A CN 201910626807 A CN201910626807 A CN 201910626807A CN 110396377 A CN110396377 A CN 110396377A
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
- C09J4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/24—Plastics; Metallised plastics based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/241—Polyolefin, e.g.rubber
- C09J7/243—Ethylene or propylene polymers
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
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- 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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
- C09J2301/208—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive layer being constituted by at least two or more adjacent or superposed adhesive layers, e.g. multilayer adhesive
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- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/304—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being heat-activatable, i.e. not tacky at temperatures inferior to 30°C
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09J2423/00—Presence of polyolefin
- C09J2423/04—Presence of homo or copolymers of ethene
- C09J2423/046—Presence of homo or copolymers of ethene in the substrate
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2423/00—Presence of polyolefin
- C09J2423/10—Presence of homo or copolymers of propene
- C09J2423/106—Presence of homo or copolymers of propene in the substrate
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Abstract
The invention discloses the pyrocondensation anti-corrosion materials of a kind of glue film containing single-component epoxy and its preparation method and application for being applied to steel pipeline anti-corrision field.The pyrocondensation anti-corrosion material of the glue film containing single-component epoxy includes internal layer, middle layer and outer layer, the internal layer is the single-component epoxy glue film containing latent curing agent, the middle layer is copolymer hot-melt sealant, the outer layer is the polyolefin sheets with pyrocondensation characteristic, and internal layer epoxy jelly membrane is cladded with antiadhesion barrier in the side far from middle layer.The pyrocondensation anti-corrosion material replaces traditional two-component epoxy coating with single-component epoxy glue film, and mixing preparation is completed in factory, it ensure that material property stability, and single-component epoxy glue film completes precoating in factory, thickness can be customized and be accurately controlled by equipment, it is easily achieved the uniformity and coating thickness controllability of film thickness, it is entirely avoided the problems such as the holiday or uneven thickness that generate when live manual application epoxy coating, provide guarantee for anticorrosive quality.
Description
Technical field
The present invention relates to a kind of pyrocondensation anti-corrosion material of glue film containing single-component epoxy in steel pipeline anti-corrision field and its answer
Use method.
Background technique
China is oil gas pipeline network construction big country, with petroleum and petrochemical industry oil gas field process units, long-distance oil & gas pipeline, oil
The asset sizes such as air reservoir are increasing, and the necessity of harm and corrosion prevention caused by corrosion of piping problem is increasingly taken seriously,
Corrosion-proof technology for pipeline comes into being and rapidly develops.
In recent years, three-decker polyethylene (3LPE), three-decker polypropylene (3LPP) are widely used anti-corrosions
Technology.The internal layer of 3LPE (PP) is the epoxy coating of 100~400 μ m-thicks, has good adhesion and prominent antikathode fissility
Can, middle layer is copolymer primer, and external side group material and inside epoxy coating have a stronger bonding force, outside be high-strength PE or
PP can make it obtain more preferable mechanical performance and effectiveness by being crosslinked.
The advantages of design synthesis of 3LPE (PP) many erosion resistant coatings, but in construction in later period and long-term anti-corrosion effect are examined
It finds the problem and emerges one after another.Cause anti-corrosion effect far below it is expected main reason is that construction quality it is uncontrollable.Such as bottom
Layer two-component epoxy coating not can avoid measurement error when preparing at the scene and mixing is uneven；It is easy sagging when coating, can not do
To coating layer thickness complete and homogeneous；Local epoxy paint solidification degree is insufficient or part lacks material etc..Furthermore it is in densely inhabited district
Town gas pipe network require that speed of application is fast, no pollution to the environment, but the two-component epoxy primer of existing 3LPE (PP) needs
Extemporaneous preparation, this not only lowers construction efficiency, and the packaging of residual epoxy coating is at the construction field (site).It is difficult to remain packing processes
Degree is big or problem of environmental pollution caused by cannot handling in time is also increasingly prominent.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of heat for the glue film containing single-component epoxy for improving anticorrosive construction efficiency
Contracting anti-corrosion material.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of pyrocondensation anti-corrosion material of the glue film containing single-component epoxy, including internal layer, middle layer and outer layer, the internal layer be containing
There is the single-component epoxy glue film of latent curing agent, the middle layer is copolymer hot-melt sealant, and the outer layer is with heat
The polyolefin sheets of contracting characteristic, the internal layer epoxy jelly membrane are cladded with antiadhesion barrier in the side far from middle layer；
The single-component epoxy glue film includes: 100 parts of epoxy resin by mass fraction, 7~20 parts of latent curing agent, is promoted
Into 0~5 part of agent, 45~100 parts of calcined alumina, 15~25 parts of mica powder, 2~4 parts of pigment；
Copolymer hot melt adhesive layer includes: 100 parts of ethylene-vinyl acetate copolymer by mass fraction, ethylene-octene copolymer
25~50 parts, 1.5~2.0 parts of maleic anhydride, 0.1~0.2 part of cumyl peroxide, 0.2~0.5 part of antioxidant, thickening tree
20~30 parts of rouge；
The content of vinyl acetate in the ethylene-vinyl acetate copolymer be 19~28%, melt index (MI) be 20~
400g/10min；
The melt index of the ethylene-octene copolymer is 15~30g/10min；
The polyolefin sheets include: 100 parts of polyolefin by mass fraction, and antioxidant 1010 is 0.2~0.3 part, antioxygen
Agent 168 is 0.1~0.15 part, and ultraviolet anti-aging agent 770 is 0.1~0.12 part, 2.0~4.0 parts of black masterbatch.
The pyrocondensation anti-corrosion material by antiadhesion barrier, single-component epoxy glue film, copolymer hot-melt sealant and polyolefin sheets into
Row is successively successively laid with production.Antiadhesion barrier prevents the adhesion of adjacent materials, it is easy to accomplish the storage transport operation of material.Make
Multilayer directly can be completed by the one-time laying of the pyrocondensation anti-corrosion material with the operation of anti-corrosion in the process and repair demand, simplify behaviour
Make step, improve anti-corrosion operating efficiency, and be easily achieved uniformity and be laid with demand, provides guarantor for subsequent anticorrosive quality
Barrier.
Further, the latent curing agent includes: liquid and 100 parts of solid epoxy resin, gas by mass fraction
2.0~3.0 parts of phase white carbon black, 70~100 parts of silica flour, 15~25 parts of modified fat amine.
Further, the pigment is that carbon black or titanium cyanogen are green.
Further, the polyolefin is polyethylene or polypropylene.
A kind of preparation method of the pyrocondensation anti-corrosion material of the glue film containing single-component epoxy, preparation step are as follows:
(a) prepare raw material: preparation former material is carried out according to a kind of above-mentioned pyrocondensation anti-corrosion material of the glue film containing single-component epoxy
The preparation of material；
(b) prepared by single-component epoxy glue film raw material: epoxy resin is added in the mixer for being 35 ± 5 DEG C to temperature and is stirred
It mixes 15~20 minutes, mica powder is added and stirs 10~15 minutes, calcined alumina is then added portionwise and stirs 25~30 points
Curing agent is added later and stirs 15~20 minutes, be eventually adding promotor and pigment and stir 8~15 minutes formation epoxies for clock
Epoxy mortar is pushed in grinder through screw rod, single-component epoxy glue film raw material is made by clay；
(c) copolymer hot melt adhesive layer raw material preparation: ethylene-vinyl acetate copolymer and ethylene-octene copolymer are put into
It in kneader, and mediates 25~30 minutes, maleic anhydride is added and mediates 8~12 minutes under 150 ± 3 DEG C of working environment,
Then cumyl peroxide is added to mediate 13~18 minutes, antioxidant then is added and tackifying resin continues 20~30 points of kneading
Copolymer hot melt adhesive layer raw material is made in clock；
(d) polyolefin sheets raw material preparation: extruder is put into after the raw material of polyolefin sheets are sufficiently stirred, after molding
Then winding is irradiated and is cross-linked to form polyolefin sheets；
(e) it coats process: respectively adding the copolymer hot melt adhesive of the single-component epoxy glue of step preparation, step preparation respectively
Enter in the correspondence hopper coated in process, the polyolefin sheets that step production is completed are first passed through into copolymer hot melt adhesive layer first and are applied
It covers section to be located under the placement hopper of copolymer hot melt adhesive layer raw material, and realizes the knot with polyolefin sheets by calendering machine equipment
It closes and is rapidly cooled to 35 DEG C of glue surface temperature copolymer hot melt adhesive layers formed below, then heat polyolefin sheets and copolymer
The placement hopper that sheet material after the completion of glue-line combination is moved to single-component epoxy glue film raw material places position, then through rolling machine equipment
Realization forms single-component epoxy glue film in conjunction with the sheet material；
(d) be sticked antiadhesion barrier: the outside for the single-component epoxy glue film that step production is completed will be overlying on outside antiadhesion barrier, then
Carry out wind-up operation, a kind of pyrocondensation anti-corrosion material preparation completion of the glue film containing single-component epoxy.
A kind of application of the pyrocondensation anti-corrosion material of the glue film containing single-component epoxy, operating procedure are as follows:
(1) prepare material: by a kind of pyrocondensation anti-corrosion material of glue film containing single-component epoxy of above-mentioned preparation according to using need
Ask the cutting for carrying out size；
(2) derusting operation: heating is carried out except moisture is operated to the pipe surface for needing to carry out anti-corrosion operation, then utilizes work
Pipe surface is carried out derusting operation by tool makes pipe surface derusting grade reach SA2.5, and removes surface dirt using rag；
(3) surface after step (2) derusting operation surface heating operation: is subjected to heating operation, the heating zone
Domain is greater than the winding width of subsequent pyrocondensation anti-corrosion material；
(4) anti-corrosion winding operation: the antiadhesion barrier (1) of pyrocondensation anti-corrosion material is removed operation first, then by single group
Divide epoxy jelly membrane (2) towards pipe surface and carries out pyrocondensation anti-corrosion material therewith to the winding operation of pipeline；
(5) be heating and curing operation: by the solid using fixinig plate progress end of the pyrocondensation anti-corrosion material of step (4) winding completion
It is fixed, heating operation then is carried out to the pyrocondensation anti-corrosion material, until the internal layer of pyrocondensation anti-corrosion material solidify, centre melting layer and outer layer
It shrinks；
(6) fixinig plate end seal operation: after the completion of step (5) heating operation, using adhesive tape to the both ends of fixinig plate
It is attached, adhesive tape is then subjected to heating and melting operation, and carry out using thawing adhesive tape of the grey knife to sealing fixinig plate both ends
Glue surface smoothes out operation, and operation is completed.
Further, the grey knife in the step (6) is carrying out carrying out heating operation in advance when glue surface smoothes out operation.
The beneficial effects of the present invention are:
1, the pyrocondensation anti-corrosion material replaces traditional two-component epoxy coating with single-component epoxy glue film, and complete in factory
At mixing preparation, ensure that the stability of material, and single-component epoxy glue film completes precoating in factory, thickness can it is customized simultaneously
It is controlled by equipment, improves production precision, it is easy to accomplish the uniformity of film thickness, it is entirely avoided live manual application epoxy
The problems such as holiday or uneven thickness for being generated when coating；
2, the single-component epoxy glue film is applied directly on copolymer hot-melt sealant, and will be overlying on outside polyolefin sheets altogether
The other side of polymers hot-melt sealant, thus make three-decker before construction be integrated, separate operations are not necessarily to when construction, are subtracted
Small heavy dependence of the anti-corrosion effect to construction quality, also makes products application more convenient time saving；
3, the pyrocondensation anti-corrosion material is made when being wound in corresponding pipe surface, and directly by same heating operation process
Internal layer carries out Structured cured, middle layer glue-line thawing during heating and outer layer realizes Material shrinkage, and then improves material
With the package of pipe surface, then the pyrocondensation anti-corrosion material realizes internal layer, middle layer using same operating process in application process
With the connection of outer layer and corresponding pipe surface, anti-corrosion operation efficiency is improved, provides guarantee for anticorrosive quality.
4, epoxy jelly membrane ingredient no longer needs individually to dispense, and removes filling process, simplifies technique, saves material, makes product
Overall cost decline；
5, directly pass through pyrocondensation anti-corrosion material when present invention application and carry out one-time laying completion multilayered structure, improve behaviour
Make efficiency, simplify operating procedure, while making no longer to generate epoxy coating waste in its operating process, improves operation environmental protection
Property.
Detailed description of the invention
Fig. 1 is a kind of pyrocondensation anti-corrosion material of glue film containing single-component epoxy of the invention and its pyrocondensation anti-corrosion of application method
Material structure schematic diagram；
In the figure, it is marked as antiadhesion barrier 1, single-component epoxy glue film 2, copolymer hot-melt sealant 3, polyolefin sheets 4.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and detailed description.
The pyrocondensation anti-corrosion material of the glue film containing single-component epoxy includes internal layer, middle layer and outer layer.Its internal layer passes through will be single
Component epoxy anticorrosive paint is prepared as film structure, that is, forms single-component epoxy glue film 2, then by the single-component epoxy glue film 2
In the middle layer formed coated on copolymer hot-melt sealant 3.The other side of copolymer hot-melt sealant 3 is connected to pyrocondensation
On the outer layer that the polyolefin sheets 4 of characteristic are formed.To prevent the adhesion between material, as shown in Figure 1, single-component epoxy glue film 2
The other side be cladded with the antiadhesion barrier 1 easily removed, and then form antiadhesion barrier 1, single-component epoxy glue film 2, copolymer hot-melting sealed
The successively laying connection structure of glue 3 and polyolefin sheets 4.Above-mentioned antiadhesion barrier 1 can be plastic film structure, utilize the smooth of its surface
Degree realizes preventing adhesiving effect.Single-component epoxy glue film 2 is that the single-component epoxy anticorrosive paint containing latent curing agent produces system
Standby to form, matching for the single-component epoxy anticorrosive paint can be selected according to the actual situation.Its internal latency is solid simultaneously
Agent can also include: liquid and 100 parts of solid epoxy resin according to mass fraction, and 2.0~3.0 parts of gas-phase silica, silica flour
70~100 parts and 15~25 parts of modified fat amine.Except the above-mentioned setting method voluntarily matched, commercial product can also be directly carried out
Purchase application.The latent curing agent contained in single-component epoxy glue film 2 should ensure that in factory under low temperature environment with epoxy
Resin mixing is crosslinked without solidifying, but can cause curing reaction after being heated to certain temperature, to realize and be laid with
The strong bond of pipeline.And the copolymer hot-melt sealant 3 that single-component epoxy glue film 2 is laid with is removed with anti-corrosive properties and mechanical performance
Outside, the carrying operation that single-component epoxy glue film 3 on the other hand can be achieved, to make uncured paste single-component epoxy glue film 2
It may be implemented well to sprawl effect on 3 surface of copolymer hot-melt sealant, and copolymer hot-melt sealant 3 can be in one pack system
Strong bond therewith after epoxy jelly membrane 2 solidifies.In addition, the middle layer also needs between outer layer, mistake is in certain bonding force, to protect
In construction and anticorrosion time limit lamination will not occur for card, ensure that product structure stability.Then above-mentioned outer layer uses and has
The polyolefin sheets 4 of pyrocondensation characteristic, the polyolefin sheets 4 carry out proportion production according to required characteristic, then by squeezing out, drawing
It stretches, cross-linking radiation process is made.To prevent adhesion, the antiadhesion barrier 1 for also needing covering easily to remove on single-component epoxy glue film 2.
Embodiment one
The internal layer of the pyrocondensation anti-corrosion material of the glue film containing single-component epoxy is that epoxy anticorrosion glue film 2 is formed by mass fraction
Are as follows: liquid-state epoxy resin E51 be 100 parts, modified imidazole curing agent 390 be 17 parts, 45 parts of calcined alumina, mica powder 23
Part, pigment selects dark green for 4.0 parts.At this point, calcined alumina is 1250 mesh.
Wherein the copolymer hot melt adhesive layer 3 of interbed is formed by mass fraction are as follows: ethylene-vinyl acetate copolymer (acetic acid second
Alkene content 28%, melt index (MI) 25g/10min) 100 parts, 50 parts of ethylene-octene copolymer (melt index (MI) 30g/10min),
2.0 parts of maleic anhydride, 0.2 part of cumyl peroxide, antioxidant 1010 is 0.3 part, and C5 resin is 30 parts of tackifying resin.
The polyolefin sheets 4 of its outer layer are formed by mass fraction are as follows: high density polyethylene (HDPE) 5000s is 50 parts, and line style is low close
Spending polyethylene 0220 is 50 parts, and antioxidant 1010 is 0.3 part, and irgasfos 168 is 0.15 part, and ultraviolet anti-aging agent 770 is 0.12 part,
2.0 parts of black masterbatch.
Its preparation step is as follows:
(a) prepare raw material: prepare according to above content the preparation of raw material；
(b) prepared by 2 raw material of single-component epoxy glue film: epoxy resin is added in the mixer for being 35 ± 5 DEG C to temperature simultaneously
Stirring 15 minutes is added mica powder and stirs 10 minutes, and calcined alumina is then added portionwise and stirs 30 minutes, is added later
Curing agent simultaneously stirs 15 minutes, is eventually adding promotor and pigment and stirs 10 minutes formation epoxy mortars, epoxy mortar is passed through
Screw rod pushes in grinder, and single-component epoxy glue film raw material is made；
(c) 3 raw material preparation of copolymer hot melt adhesive layer: ethylene-vinyl acetate copolymer and ethylene-octene copolymer are put into
It in kneader, and mediates 30 minutes, maleic anhydride is added and mediates 10 minutes under 150 DEG C of working environment, be then added
It aoxidizes diisopropylbenzene (DIPB) to mediate 15 minutes, antioxidant is then added and tackifying resin continues to mediate 25 minutes, copolymer hot melt is made
Glue-line raw material；
(d) 4 raw material preparation of polyolefin sheets: it is put into extruder after the raw material of polyolefin sheets 4 are sufficiently stirred, is extruded into
The sheet of thickness 1.5mm, winding, irradiation (high-power electron beam) 350KGy, forms polyolefin sheets 4；
(e) process is coated: respectively by the single-component epoxy glue film raw material of step (b) preparation, the copolymer of step (c) preparation
Hot melt adhesive raw material is separately added into the correspondence hopper in coating process, 145 ± 5 DEG C of the coating die head temperature in the coating operation,
Rubberization thickness 1.5mm is set, the polyolefin sheets 4 that step (d) production is completed are first passed through into copolymer hot melt adhesive layer 3 first and are coated
Section is located under the placement hopper of copolymer hot melt adhesive layer raw material, and the knot with polyolefin sheets 4 is realized by calendering machine equipment
It closes and is rapidly cooled to 35 DEG C of glue surface temperature copolymer hot melt adhesive layers 3 formed below, then by polyolefin sheets 4 and copolymer heat
The placement hopper that sheet material after the completion of the combination of melt layer 3 is moved to single-component epoxy glue film raw material places position, and setting corresponds at this time
Coating thickness be 0.3mm, then through calendering machine equipment realization single-component epoxy glue film 2 is formed in conjunction with the sheet material；
(d) be sticked antiadhesion barrier: the outside for the single-component epoxy glue film 2 that step (e) production is completed will be overlying on outside antiadhesion barrier,
Then wind-up operation, a kind of pyrocondensation anti-corrosion material preparation completion of the glue film containing single-component epoxy are carried out.
The finished product of the embodiment one preparation can stablize storage 5 months at 20 DEG C.Sandblasting is carried out to steel pipe first when construction
It derusts, and is preheated to 85~95 DEG C, then wrapped pyrocondensation belt, and shunk with infrared heating, under 200~220 DEG C of environment temperatures
It is tempered 4~5min, so far operation is completed.
Embodiment two
The internal layer epoxy dope film of the pyrocondensation anti-corrosion material of the glue film containing single-component epoxy is formed by mass fraction are as follows: liquid
State epoxy resin E51 is 75 parts, and liquid-state epoxy resin E44 is 25 parts, 7 parts of modified dicyandiamine curing agent, 5 parts of promotor, is calcined
100 parts of aluminium oxide, 15 parts of mica powder, pigment is 3.0 parts of dark green.The calcined alumina is 150 mesh.
Wherein the copolymer hot melt adhesive layer 3 of interbed is formed by mass fraction are as follows: ethylene-vinyl acetate copolymer (V acetic acid second
Alkene content 19%, melt index (MI) 75g/10min) 100 parts, ethylene-octene copolymer melt index (MI) 15g/10min) 37.5 parts, horse
Come 1.8 parts of acid anhydrides, 0.18 part of cumyl peroxide, antioxidant 1010 is 0.2 part, 25 parts of alkyl phenol tackifying resin.
Its outer layer polyolefin sheets 4 is formed by mass fraction are as follows: high density polyethylene (HDPE) HB5020 is 75 parts, low density polyethylene
Alkene 7042 is 25 parts, and antioxidant 1010 is 0.2 part, and irgasfos 168 is 0.12 part, and ultraviolet anti-aging agent 770 is 0.10 part, black masterbatch
4.0 part.
Its preparation step is as follows:
(a) prepare raw material: prepare according to above content the preparation of raw material；
(b) prepared by 2 raw material of single-component epoxy glue film: epoxy resin is added in the mixer for being 35 ± 5 DEG C to temperature simultaneously
Stirring 15 minutes is added mica powder and stirs 10 minutes, and calcined alumina is then added portionwise and stirs 30 minutes, is added later
Curing agent simultaneously stirs 20 minutes, is eventually adding promotor stirring and the 10 minutes formation epoxy glues of stirring of dark green 3.0 are added after five minutes
Epoxy mortar is pushed in grinder through screw rod, single-component epoxy glue film raw material is made by mud；
(c) 3 raw material preparation of copolymer hot melt adhesive layer: ethylene-vinyl acetate copolymer and ethylene-octene copolymer are put into
It in kneader, and mediates 30 minutes, maleic anhydride is added and mediates 10 minutes under 150 DEG C of working environment, be then added
It aoxidizes diisopropylbenzene (DIPB) to mediate 15 minutes, antioxidant is then added and tackifying resin continues to mediate 25 minutes, copolymer hot melt is made
Glue-line raw material；
(d) 4 raw material preparation of polyolefin sheets: it is put into extruder after the raw material of polyolefin sheets 4 are sufficiently stirred, is extruded into
The sheet of thickness 1.0mm, winding, irradiation (high-power electron beam) 250KGy, forms polyolefin sheets 4；
(e) process is coated: respectively by the single-component epoxy glue film raw material of step (b) preparation, the copolymer of step (c) preparation
Hot melt adhesive raw material is separately added into the correspondence hopper in coating process, 145 ± 5 DEG C of the coating die head temperature in the coating operation,
Rubberization thickness 1.5mm is set, the polyolefin sheets 4 that step (d) production is completed are first passed through into copolymer hot melt adhesive layer 3 first and are coated
Section is located under the placement hopper of copolymer hot melt adhesive layer raw material, and the knot with polyolefin sheets 4 is realized by calendering machine equipment
It closes and is rapidly cooled to 35 DEG C of glue surface temperature copolymer hot melt adhesive layers 3 formed below, then by polyolefin sheets 4 and copolymer heat
The placement hopper that sheet material after the completion of the combination of melt layer 3 is moved to single-component epoxy glue film raw material places position, and setting corresponds at this time
Coating thickness be 0.2mm, then through calendering machine equipment realization single-component epoxy glue film 2 is formed in conjunction with the sheet material；
(d) be sticked antiadhesion barrier: the outside for the single-component epoxy glue film 2 that step (e) production is completed will be overlying on outside antiadhesion barrier,
Then wind-up operation, a kind of pyrocondensation anti-corrosion material preparation completion of the glue film containing single-component epoxy are carried out.
The finished product of the embodiment two preparation can stablize storage 8 months at 20 DEG C.Steel pipe derusting by sandblasting when construction, is preheated to
100~120 DEG C, then wrapped pyrocondensation belt, and being shunk by infrared heating, finally at a temperature of 200~220 DEG C tempering 10~
12min, then corresponding operation terminates.
Embodiment three
The internal layer epoxy jelly membrane of the pyrocondensation anti-corrosion material of the glue film containing single-component epoxy 2 is formed by mass fraction are as follows: liquid
Epoxy resin E51 is 85 parts, and solid epoxy resin 438 is 15 parts, and modified imidazole curing agent SHA85 is 20 parts, calcined alumina
It is 75 parts, 15 parts of mica powder, 2.0 parts of dark green, and calcined alumina is 1250 mesh.
Wherein interbed copolymer hot melt adhesive layer 3 is formed by mass fraction are as follows: ethylene-vinyl acetate copolymer (vinyl acetate
Content 28%, melt index (MI) 25g/10min) 60 parts, ethylene-vinyl acetate copolymer (vinyl acetate content 28%, melt index (MI)
400g/10min) 40 parts, 30 parts of ethylene-octene copolymer POE (melt index (MI) 22g/10min), 2.0 parts of maleic anhydride, peroxide
Change 0.2 part of diisopropylbenzene (DIPB), antioxidant 1010 is 0.3 part, 25 parts of C5 resin.
Its outer layer polyolefin this material 4 is by mass fraction composition are as follows: high density polyethylene (HDPE) 5000s is 62.5 parts, and line style is low close
Spending polyethylene 0220 is 37.5 parts, and antioxidant 1010 is 0.3 part, and irgasfos 168 is 0.15 part, and ultraviolet anti-aging agent 770 is 0.12
Part, 3.0 parts of black masterbatch.
Its preparation step is as follows:
(a) prepare raw material: prepare according to above content the preparation of raw material；
(b) prepared by 2 raw material of single-component epoxy glue film: epoxy resin is added in the mixer for being 35 ± 5 DEG C to temperature simultaneously
Stirring 15 minutes is added mica powder and stirs 10 minutes, and calcined alumina is then added portionwise and stirs 30 minutes, is added later
20 parts of modified imidazole curing agent simultaneously stirs 18 minutes, is eventually adding dark green 4.0 and stirs 10 minutes formation epoxy mortars, by epoxy
Clay pushes in grinder through screw rod, and single-component epoxy glue film raw material is made；
(c) 3 raw material preparation of copolymer hot melt adhesive layer: ethylene-vinyl acetate copolymer and ethylene-octene copolymer are put into
It in kneader, and mediates 30 minutes, maleic anhydride is added and mediates 10 minutes under 150 DEG C of working environment, be then added
It aoxidizes diisopropylbenzene (DIPB) to mediate 15 minutes, antioxidant is then added and tackifying resin continues to mediate 25 minutes, copolymer hot melt is made
Glue-line raw material；
(d) 4 raw material preparation of polyolefin sheets: it is put into extruder after the raw material of polyolefin sheets 4 are sufficiently stirred, is extruded into
The sheet of thickness 1.0mm, winding, irradiation (high-power electron beam) 300KGy, forms polyolefin sheets 4；
(e) process is coated: respectively by the single-component epoxy glue film raw material of step (b) preparation, the copolymer of step (c) preparation
Hot melt adhesive raw material is separately added into the correspondence hopper in coating process, 145 ± 5 DEG C of the coating die head temperature in the coating operation,
Rubberization thickness 1.2mm is set, the polyolefin sheets 4 that step (d) production is completed are first passed through into copolymer hot melt adhesive layer 3 first and are coated
Section is located under the placement hopper of copolymer hot melt adhesive layer raw material, and the knot with polyolefin sheets 4 is realized by calendering machine equipment
It closes and is rapidly cooled to 35 DEG C of glue surface temperature copolymer hot melt adhesive layers 3 formed below, then by polyolefin sheets 4 and copolymer heat
The placement hopper that sheet material after the completion of the combination of melt layer 3 is moved to single-component epoxy glue film raw material places position, and setting corresponds at this time
Coating thickness be 0.3mm, then through calendering machine equipment realization single-component epoxy glue film 2 is formed in conjunction with the sheet material；
(d) be sticked antiadhesion barrier: the outside for the single-component epoxy glue film 2 that step (e) production is completed will be overlying on outside antiadhesion barrier,
Then wind-up operation, a kind of pyrocondensation anti-corrosion material preparation completion of the glue film containing single-component epoxy are carried out.
The finished product of the embodiment three preparation can stablize storage 2~3 months at 20 DEG C.Steel pipe derusting by sandblasting when construction, in advance
Heat is to 90~100 DEG C, then wrapped pyrocondensation belt, and is shunk by infrared heating, is finally tempered 10 at a temperature of 200~220 DEG C
~15min, then corresponding operation terminates.
By embodiment one, embodiment two and three gained finished product of embodiment on pipeline, and exemplar is made.According to
Peel strength, hot-water soak, cathodic disbonding, the impact strength of standard GB/T 23257, GB/T51241, difference test sample.It should
Test result is as follows for embodiment shown in table 1.
Table 1
As shown in Table 1, the finished product of embodiment one, embodiment two and embodiment three all has good peel strength.It is heat-resisting
Water impregnates conservation rate > 85% that test result shows peel strength, it follows that the present invention has excellent stability.Cathode
Peel test results fully meet standard requirements, show that the present invention ensure that epoxy coating exists while simplifying construction well
Adhesive force on steel pipe, another according to GB/T23257 standard testing, the exemplar impact strength after erosion resistant coating is constructed reaches
15J has preferable shock resistance and resists the ability of other mechanical damages.
The hot anti-corrosion material in application process specific steps are as follows:
(1) prepare material: antiadhesion barrier 1, single-component epoxy glue film 2, copolymer heat are carried out according to practical application scene demand
Molten sealant 3, polyolefin sheets 4 carry out proportion production, then carry out certain thickness laying according to different application demands and connect
Operation is connect, appropriate size, transport to corresponding anti-corrosion position are finally cut to.Above-mentioned single-component epoxy glue film 2 is completed pre- in factory
Coating, thickness can be customized and be controlled by equipment, improve production precision, it is easy to accomplish the uniformity of film thickness is kept away completely
The problems such as having exempted from the holiday generated when live manual application epoxy coating or uneven thickness.
(2) derusting operation: heating derusting operation is carried out to the pipe surface for needing to carry out anti-corrosion operation, it should be ensured that repair and mend
The attachments such as strong region surface without grease, dirt, oxide skin.The operation can be derusted by manual derusting by sandblasting or manual grinding,
To guarantee that pipeline external surface reaches corresponding standard.
(3) surface after step (2) derusting operation surface heating operation: is subjected to heating operation, the heating zone
Domain is greater than the winding width of subsequent pyrocondensation anti-corrosion material, to guarantee the adhesive effect of pipe surface Yu pyrocondensation anti-corrosion material；
(4) anti-corrosion winding operation: the antiadhesion barrier 1 that single-component epoxy glue film 2 connects is removed behaviour by staff first
Make, then contacts single-component epoxy glue film 2 towards pipe surface and therewith, subsequent staff prevents band-like pyrocondensation
Rotten material is around surrounding on corresponding pipeline.In above-mentioned wrapped operating process, staff can give pyrocondensation anti-corrosion material one
Fixed tractive force guarantees going on smoothly for winding operation.
(5) be heating and curing operation: the pyrocondensation anti-corrosion that staff is laid with above-mentioned steps (3) winding first with fixinig plate
The both ends of material are fixed., can be first by doubling after fixinig plate mild heat in fixinig plate connection procedure, glue surface is outwardly.
Then the fixinig plate of doubling is gently attached to the end of pyrocondensation anti-corrosion material, upper edge and the fixation oblique cut grafting line pair planned in advance
Together.Then the one side for opening fixinig plate with fireproof glove is utilized, heats fixinig plate glue surface with moderate flame, keeps glue surface sufficiently molten
Change, clapped with hand handle fixinig plate, is glued real.Then fixinig plate another side is mounted on pyrocondensation anti-corrosion material with same method,
And fixinig plate is clapped with hand and is made real, the bubble under fixinig plate is discharged, is flattened with pressure roller.
To be fixed be installed after heating operation is carried out to the pyrocondensation anti-corrosion material of corresponding position.Staff is available
Heating blowpipe circumferentially heats the intermediate position of pyrocondensation anti-corrosion material along pipeline, and flame is best apart from steel tube surface 15-30cm, and at the uniform velocity
Mobile heating flame.The package tension that the pyrocondensation anti-corrosion material of pipe surface is wound in step (3) is smaller, then pyrocondensation preserving timber
Expect lower with the bonding strength of pipe surface.At this time pyrocondensation anti-corrosion material during heating, the polyolefin sheets 4 in outer layer
Shrink and then lock ring in pipeline external surface forms corrosion protective covering, while the copolymer hot-melt sealant 3 as middle layer
Melting forms complete sealant, and the single-component epoxy glue film 2 of pipe surface contact generates curing operation, realizes and pipeline table
The strong bond in face.At this point, the contraction process by cladding material will give internal layer and middle layer with certain towards pipeline
Extruding force, while the application of its pressure can promote the distributing homogeneity and compactness of each layer of material contracting with heat.The heating operation
Until the pyrocondensation anti-corrosion material that middle part has been shunk is coated on steel pipe as waistband, corresponding fixinig plate can normal heating.When
After being shrunk to form of belt, the root for the pyrocondensation anti-corrosion material completed with heating blowpipe along heating operation is uniformly circumferentially heated, then
Pyrocondensation anti-corrosion material continues slowly to shrink to edge, is shunk separately when after the completion of one end is shunk and having glue spilling with same method
One end, until having glue spilling.
During above-mentioned heating operation, staff can press with finger the pyrocondensation anticorrosion belt shunk, check intermediate
Whether layer sufficiently realizes 2 solidification effect of single-component epoxy glue film of the fusing of copolymer hot-melt sealant 3 and bottom.If impression
It is automatic quickly to disappear, show copolymer hot-melt sealant 3 abundant melted by heat and the solidification completion of single-component epoxy glue film 2；It is no
Heating should then be continued until impression energy quick disappearance.After the heating operation, it is tempered 2-3 minutes with high fire Quick uniform.Gu
Stator and overlapping regions also Ying Huihuo, and with roller compaction bubble removing side by side.
(6) fixinig plate end seal operation:
(7) if being accidentally enclosed with bubble during installation, should when pyrocondensation anti-corrosion material is also awfully hot pressure roller or
Finger is outwardly against bubble, until bubble is all discharged.After the solidification of pyrocondensation anti-corrosion material, fixinig plate is attached to short adhesive tape
Both ends, and heat adhesive tape to abundant fusing with flame.Glue surface, which is smoothed out, with the grey knife for baking heat simultaneously seals fixinig plate both ends.Installation
Good shrink belt answers plastic emitting uniform, and so far anti-corrosion operation is completed.
For the pyrocondensation anti-corrosion material under the contraction of polyolefin sheets, the connection for realizing erosion resistant coating and pipe surface is tight
Close property, improves quality of connection, ensure that anti-corrosion effect.And pyrocondensation anti-corrosion material carries out one-time laying and completes multilayered structure,
Operating efficiency is improved, operating procedure is simplified, while making no longer to generate epoxy coating waste in its operating process, is improved
Operate the feature of environmental protection.And multilayer is completed to wrap up curing operation with the connection of pipeline during same heating operation, ensure that solidification
Quality and anticorrosive quality.
Above-mentioned latent curing agent includes that 95 parts of liquid-state epoxy resin, 5 parts of solid epoxy resin, gas phase are white by mass fraction
2.3 parts of carbon black, 100 parts and 18 parts of modified fat amine of silica flour, and then form embodiment three.Latency in example IV is solid
Agent includes 85 parts of liquid-state epoxy resin, 15 parts of solid epoxy resin, 2.8 parts of gas-phase silica, silica flour 70 by mass fraction
Part and 23 parts of modified fat amine.Then the cathodic disbonding of erosion resistant coating embodiment one and embodiment two formed, peel strength
It can be carried out test with impact resistance.The cathodic disbonding performance test condition is 50 DEG C, 28d, and peel strength performance test is 23 DEG C
Test temperature, shock resistance test is 15J buckles, and the test result is as shown in table 2.
Table 2
| Cathodic disbonding (50 DEG C, 28d) | Peel strength (23 DEG C) | Shock resistance (15J) | |
| Embodiment three | 7.5mm | 135N/cm, cohesional failure | Without leak source |
| Example IV | 9.3mm | 112N/cm, cohesional failure | Without leak source |
As seen from the above table, which realizes preferable safety system performance while simplifying operating procedure,
It ensure that the practicability of the material, the anticorrosive quality for application pipeline provides guarantee.Furthermore the material realizes storability,
The limitation for reducing coating time, ensure that work quality.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
It describes in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in guarantor of the invention
Within the scope of shield.
Claims (7)
1. a kind of pyrocondensation anti-corrosion material of glue film containing single-component epoxy, which is characterized in that including internal layer, middle layer and outer layer, institute
Stating internal layer is the single-component epoxy glue film (2) containing latent curing agent, and the middle layer is copolymer hot-melting sealed glue-line
(3), the outer layer is the polyolefin sheets (4) with pyrocondensation characteristic, and the single-component epoxy glue film (2) is in separate middle layer
Side is cladded with antiadhesion barrier (1)；
The single-component epoxy glue film (2) includes: 100 parts of epoxy resin by mass fraction, 7~20 parts of latent curing agent, is promoted
Into 0~5 part of agent, 45~100 parts of calcined alumina, 15~25 parts of mica powder, 2~4 parts of pigment；
Copolymer hot melt adhesive layer (3) includes: 100 parts of ethylene-vinyl acetate copolymer by mass fraction, ethylene-octene copolymer
25~50 parts, 1.5~2.0 parts of maleic anhydride, 0.1~0.2 part of cumyl peroxide, 0.2~0.5 part of antioxidant, thickening tree
20~30 parts of rouge；
The content of vinyl acetate in the ethylene-vinyl acetate copolymer is 19~28%, and melt index (MI) is 20~400g/
10min；
The melt index of the ethylene-octene copolymer is 15~30g/10min；
The polyolefin sheets (4) include: 100 parts of polyolefin by mass fraction, and antioxidant 1010 is 0.2~0.3 part, antioxidant
168 be 0.1~0.15 part, and ultraviolet anti-aging agent 770 is 0.1~0.12 part, 2.0~4.0 parts of black masterbatch.
2. a kind of pyrocondensation anti-corrosion material of glue film containing single-component epoxy according to claim 1, which is characterized in that described latent
Volt property curing agent includes: liquid and 100 parts of solid epoxy resin by mass fraction, and 2.0~3.0 parts of gas-phase silica, silica flour
70~100 parts, 15~25 parts of modified fat amine.
3. a kind of pyrocondensation anti-corrosion material of glue film containing single-component epoxy according to claim 1, which is characterized in that the face
Material is that carbon black or titanium cyanogen are green.
4. a kind of pyrocondensation anti-corrosion material of glue film containing single-component epoxy according to claim 1, which is characterized in that described poly-
Alkene is polyethylene or polypropylene.
5. a kind of preparation method of the pyrocondensation anti-corrosion material of glue film containing single-component epoxy, which is characterized in that preparation step is as follows:
(a) prepare a kind of raw material: pyrocondensation of the glue film containing single-component epoxy as claimed in any of claims 1 to 4
Anti-corrosion material prepare the preparation of raw material；
(b) prepared by single-component epoxy glue film (2) raw material: epoxy resin is added in the mixer for being 35 ± 5 DEG C to temperature and is stirred
It mixes 15~20 minutes, mica powder is added and stirs 10~15 minutes, calcined alumina is then added portionwise and stirs 25~30 points
Curing agent is added later and stirs 15~20 minutes, be eventually adding promotor and pigment and stir 8~15 minutes formation epoxies for clock
Epoxy mortar is pushed in grinder through screw rod, single-component epoxy glue film raw material is made by clay；
(c) copolymer hot melt adhesive layer (3) raw material preparation: ethylene-vinyl acetate copolymer and ethylene-octene copolymer are put into and pinched
It in conjunction machine, and is mediated 25~30 minutes under 150 ± 3 DEG C of working environment, maleic anhydride and kneading 8~12 minutes is added, so
Cumyl peroxide is added afterwards to mediate 13~18 minutes, antioxidant then is added and tackifying resin continues 20~30 points of kneading
Copolymer hot melt adhesive layer raw material is made in clock；
(d) polyolefin sheets (4) raw material preparation: being put into extruder after the raw material of polyolefin sheets (4) are sufficiently stirred, molding
After wind, then be irradiated be cross-linked to form polyolefin sheets (4)；
(e) it coats process: respectively distinguishing the copolymer hot melt adhesive of the single-component epoxy glue of step (b) preparation, step (c) preparation
It is added in the correspondence hopper in coating process, the polyolefin sheets (4) that step (d) production is completed is first passed through into copolymer heat first
Melt layer (3) coated segment is to be located under the placement hopper of copolymer hot melt adhesive layer raw material, and realize and gather by calendering machine equipment
The combination of alkene sheet material (4) and 35 DEG C of glue surface temperature copolymer hot melt adhesive layers (3) formed below are rapidly cooled to, then by polyene
Sheet material after the completion of hydrocarbon sheet material (4) and copolymer hot melt adhesive layer (3) combination is moved to the placement material of single-component epoxy glue film raw material
Slot places position, and single-component epoxy glue film (2) are then formed in conjunction with the sheet material through calendering machine equipment realization；
(d) be sticked antiadhesion barrier: the outside for the single-component epoxy glue film (2) that step (e) production is completed will be overlying on outside antiadhesion barrier, so
After carry out wind-up operation, prepared by a kind of pyrocondensation anti-corrosion material of the glue film containing single-component epoxy completes.
6. a kind of application of the pyrocondensation anti-corrosion material of glue film containing single-component epoxy, which is characterized in that operating procedure is as follows:
(1) prepare material: by a kind of preparation of the pyrocondensation anti-corrosion material of glue film containing single-component epoxy described in the claims 5
Method carries out the cutting of size according to application demand；
(2) derusting operation: carrying out heating to the pipe surface for needing to carry out anti-corrosion operation and remove moisture operation, then will using tool
Pipe surface, which carries out derusting operation, makes pipe surface derusting grade reach SA2.5, and removes surface dirt using rag；
(3) surface heating operation: the surface after step (2) derusting operation is subjected to heating operation, the heating region is big
In the winding width of subsequent pyrocondensation anti-corrosion material；
(4) anti-corrosion winding operation: the antiadhesion barrier (1) of pyrocondensation anti-corrosion material is removed operation first, then by one pack system ring
Oxygen glue film (2) carries out pyrocondensation anti-corrosion material to the winding operation of pipeline towards pipe surface and therewith；
(5) be heating and curing operation: step (4) are wound into fixing using fixinig plate progress end for the pyrocondensation anti-corrosion material completed,
Then heating operation is carried out to the pyrocondensation anti-corrosion material, until the internal layer of pyrocondensation anti-corrosion material solidifies, intermediate melting layer and outer layer are received
Contracting；
(6) fixinig plate end seal operation: being attached using both ends of the adhesive tape to fixinig plate, and adhesive tape is then carried out heating and is melted
Change operation, and carry out glue surface using thawing adhesive tape of the grey knife to sealing fixinig plate both ends and smooth out operation, operation is completed.
7. according to a kind of application of the pyrocondensation anti-corrosion material of glue film containing single-component epoxy of claim, which is characterized in that the step
Suddenly the grey knife in (6) is carrying out carrying out heating operation in advance when glue surface smoothes out operation.
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