CN102382553A - Solvent-free epoxy primer for high temperature corrosion prevention of steel pipeline welded junction position - Google Patents
Solvent-free epoxy primer for high temperature corrosion prevention of steel pipeline welded junction position Download PDFInfo
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- CN102382553A CN102382553A CN2011102469585A CN201110246958A CN102382553A CN 102382553 A CN102382553 A CN 102382553A CN 2011102469585 A CN2011102469585 A CN 2011102469585A CN 201110246958 A CN201110246958 A CN 201110246958A CN 102382553 A CN102382553 A CN 102382553A
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Abstract
The invention discloses a solvent-free epoxy primer for high temperature corrosion prevention of a steel pipeline welded junction position, which is composed by a component A of 50% to 80% and a component B of 20% to 50%. The component A is composed of components including, by weight, 30 to 80 parts of phenolic aldehyde epoxy resin, 2 to 20 parts of flexibilizer, 15 to 50 parts of filler, 1 to 5 parts of pigment, 5 to 10 parts of reactive diluent and 0.2 to 5 parts of addition agent. The addition agent is composed of the following components including, by weight, 10 to 20 parts of dispersing agent, 0 to 10 parts of anti-settling agent, 5 to 20 parts of defoamer, 5 to 20 parts of flatting agent and 0 to 10 parts of coupling agent. The component B is composed of polyamide epoxy curing agent of 20% to 80% and polyamine curing agent of 20% to 80%. The solvent-free epoxy primer is applied to pipeline corrosion prevention in the high-temperature environment, good adhesive property, namely high adhesive strength between the epoxy primer and an oil gas conveying pipeline is guaranteed, and good adhesion between the epoxy primer and a hot melting adhesive layer for high temperature is guaranteed simultaneously.
Description
Technical field
The present invention relates to a kind of priming paint, relate in particular to a kind of steel pipe welded junction part high-temperature anticorrosion that is used for and use non-solvent epoxy priming paint.
Background technology
Oil and gas adopts the metallic conduit mode of movement to have safe and reliable, quick facility and economically viable advantage, and in order to ensure the safe operation and the work-ing life of pipeline, pipeline corrosion protection just becomes the top-priority problem of pipe-line construction.Metallic conduit transfer oil Sweet natural gas significantly increases the demand of clean energy along with national economy increases fast with people, and pipeline construction gets more and more, and the geology of pipeline process and weather condition are more and more harsh, and are more and more high to the requirement of pipeline corrosion protection; Aseptic technic is from early stage coal tar enamel, the technical development of pitch preservative coat three layers of aseptic technic of epoxy coat one hot melt adhesive, one crosslinked polyethylene till now; Improved the operation life of pipeline effectively, and the epoxy Primer that wherein plays best preservative effect is particularly crucial.
Consider the protection to environment, used epoxy primer is generally no-solvent type at present, guarantees workmen's personnel safety, environmentally safe.Here used non-solvent epoxy priming paint mainly is made up of several sections such as epoxy resin, reactive thinner, color stuffing, solidifying agent and corresponding adjuvants; Rely on that it is nuisanceless, it is wide to adapt to, solidify rapidly; Be suitable for advantages such as continuous and automatic production line, cost be lower; Be used to the field of pipeline corrosion protection rapidly, paid attention to widely.At present, the principal item of non-solvent epoxy priming paint has had good throughput at home, and has certain scale.
Along with fast development of national economy; The application of engineering pipeline more and more widely; Especially the gas pipe line of China; 2006 to 2010, along with engineering is sent in gas east, river, the plan of the maximum gas pipe line engineering in two wires engineering, the normal pipework of blue Zheng and Sino-Russian Xinjiang of transferring natural gas from the west to the east goes into operation, with the peak period that starts the China's oil NG Pipeline Construction.Simultaneously; The foreign oil margin is very big, and the great majority that on transportation oil mode, adopt also are steel pipes, because the climate difference between the country variant is very big; Especially the temperature of Middle East desert area is usually up to 60-80 degree centigrade; And environment is in certain saline and alkaline location, and this requirement to pipeline corrosion protection is particularly harsh, needs the development of the novel epoxy primer with excellent high temperature resistance.
Summary of the invention
In order to solve the above-mentioned deficiency that prior art exists; Technical problem to be solved by this invention provides a kind of steel pipe welded junction part high-temperature anticorrosion that is used for and uses non-solvent epoxy priming paint; Be applied to pipeline corrosion protection under the hot environment, guarantee that having good adhesive property between epoxy primer and the oil and gas pipeline is higher bonding strength, while and high temperature are with also having cohesiveness preferably between the hot melt adhesive layer; And can adapt to current environmental requirement, environment is not polluted and destroys.
The objective of the invention is to realize like this:
A kind of steel pipe welded junction part high-temperature anticorrosion that is used for is used non-solvent epoxy priming paint, by mass percentage, forms by the A component of 50-80% and the B component of 20-50%,
Wherein, said A component is made up of following each component: novolac epoxy 30-80 part by weight; Toughner 2-20 part; Filler 15-50 part; Pigment 1-5 part; Reactive thinner 5-10 part; Auxiliary agent 0.2-5 part;
Said B component by mass percentage, is made up of 20-80% daiamid epoxy curing agent and the many first amine curing agents of 20-80%;
Said auxiliary agent is made up of following component by weight: dispersion agent 10-20 part, anti-settling agent 0-10 part, skimmer 5-20 part, flow agent 5-20 part, coupling agent 0-10 part.
Preferably, said auxiliary agent is made up of following component by weight: dispersion agent 10-20 part, anti-settling agent 1-10 part, skimmer 5-20 part, flow agent 5-20 part, coupling agent 1-10 part.
Above-mentioned dispersion agent, anti-settling agent, skimmer, flow agent and coupling agent are industry accessory ingredient of in common use.
Said dispersion agent is preferably urethane, and purpose is to prevent pigment coacervation, pigment loose colour and grows dim.
Said anti-settling agent is preferably aerosil, and purpose is to prevent the color stuffing deposition, and makes priming paint possess certain thixotropy.
Said skimmer is preferably the organic silicone defoamer, claims that again silicone defoamer, purpose are the bubble of eliminating or preventing in production, packing and use, to produce.
Said flow agent is preferably silicone based flow agent, and flow agent is a kind of coatings additive(s) commonly used, it can impel coating in the drying and forming-film process, form one smooth, smooth, film uniformly.Like polyether-modified methyl polysiloxane flow agent, be specially flow agent KL-300, KL-306, KL-307 etc.
Said coupling agent is preferably organo silane coupling agent, like silane resin acceptor kh-550.
Said novolac epoxy is phenol aldehyde modified epoxy resin, has higher epoxy group(ing), and excellent thermotolerance, mechanical property and medium-resistance solidify the back cross-linking density and do, and heat-drawn wire is high.Like the F51 novolac epoxy of blue star Wuxi resin processing plant production, the DEN425 of Tao Shi Chemical Manufacture.
Said toughner is a kind of or its mixture in thio resin, LNBR and the urethane.
Said filler, the thermotolerance weighting agent guarantees that coating can keep performance not descend under hot conditions.Concrete filler is a kind of or its mixture in permanent white, aluminium triphosphate, mica powder, lime carbonate, silit, talcum powder, aerosil and the Zinic stearas.
Said pigment is industry universal pigment, and for example iron oxide red, carbon black, Rutile type Titanium Dioxide, iron oxide green or diarylide yellow etc. can be allocated shades of colour as required.
Said reactive thinner is a kind of or its mixture in diglycidylether, polyglycidyl ether, epoxy propane butyl ether, propylene oxide phenyl ether, diepoxy propane ethyl ether or the three propylene oxide propyl ethers.
Said daiamid epoxy curing agent is preferably the Versamid epoxy hardener.During with the epoxy resin proportioning, suitable, the quick solidifying of operable time, cured article has characteristics such as the high and cementability of hardness is good simultaneously.The concrete daiamid epoxy curing agent of producing like Shanghai chemical industry ltd 115 that can adopt in the present invention; The daiamid epoxy curing agent V140 that the Ninghua worker of section (China) ltd produces, the Versamid 650,651 that blue star Wuxi resin processing plant produces etc.
Said polynary amine curing agent is modified fatty amine curing agent, has good toughness, little, the intensity advantages of higher of toxicity than fatty amine curing agent.Said modified fatty amine curing agent can be T31 solidifying agent, TZ-500 pnenolic aldehyde amine hardener, 701 solidifying agent, 702 solidifying agent, 703 solidifying agent etc.
The epoxy resin that the present invention adopted is multifunction group epoxy value resin, because viscosity is higher, it is easy to process to need the certain reactive thinner of interpolation to make, and water-intake rate is below 0.5%, and its chemicalstability is good, strong adhesion, hardness height; Can improve after adding toughner that its snappiness is poor, problems such as poor in processability, paint film are crisp, resistance to impact shock difference, and solidifying agent adopts the composite solidifying agent of flexible polyamide and modified fatty amine, also improves the toughness of paint film preferably.
Adopt industry ordinary method; Earlier the raw material in the A component is milled to mix and make the A component; Raw material stirring in the B component mixed make the B component; Again A component and B component are mixed, can make the steel pipe welded junction part high-temperature anticorrosion that is used for of the present invention and use non-solvent epoxy priming paint.
With respect to prior art, beneficial effect of the present invention is embodied as:
1. to be used for steel pipe welded junction part high-temperature anticorrosion splendid with its performance of non-solvent epoxy priming paint in the present invention, brushes with routine, and the priming paint solid content can reach 100%, and no organic volatile is minimum to the contaminative of atmospheric environment.Brush the film thickness that can reach for a time more than the 120 μ m, and epoxy resin primer in the past only there is the film thickness about 50 μ m for one time, the production efficiency when visible use coating of the present invention can improve coating greatly.
2. the present invention is used for the liquid coating that steel pipe welded junction part high-temperature anticorrosion uses non-solvent epoxy priming paint to construct as wet film, and easy construction need not to upgrade paint line, brushes to get final product.
3. the present invention is used for steel pipe welded junction part high-temperature anticorrosion and has good paint film adhesion with non-solvent epoxy priming paint; Snappiness is good; Impact resistance is good, and has good high temperature resistance cathodic disbonding performance, heat-resisting water logging bubble, salt spray resistance, water-fast, acidproof, alkaline-resisting, ageing-resistant performance.
4. the present invention is used for steel pipe welded junction part high-temperature anticorrosion and can be used for the anticorrosion usefulness of oil transportation steel pipe weld bond with non-solvent epoxy priming paint; And can under hot conditions, keep each item performance under its normal temperature constant, can be used for the baking more than 120 ℃ and other change does not take place.
Embodiment
Below in conjunction with embodiment the present invention is further described.
Embodiment 1
Take by weighing: 10 kilograms of urethane, 10 kilograms of aerosils, 5 kilograms of organic silicone defoamers, 20 kilograms of silicone based flow agents, 1 kilogram of silane resin acceptor kh-550 mixes, and can make the used auxiliary agent of present embodiment.
Press table 1 corresponding component and add-on, in novolac epoxy, add toughner and reactive thinner, treat to add filler, pigment and auxiliary agent again after compatible fully, milling to mix makes the A component.
Take by weighing 60 kilograms of 40 kilograms of daiamid epoxy curing agents and polynary amine curing agents, mix, promptly make the B component.
Said polynary amine curing agent is the T31 solidifying agent.
A component and B component are mixed, and wherein, the mass ratio of A component and B component is 50:50, can make the steel pipe welded junction part high-temperature anticorrosion that is used for of the present invention and use non-solvent epoxy priming paint.
Table 1:A component formula list position: kilogram
Embodiment 2
Take by weighing: 20 kilograms of urethane, 1 kilogram of aerosil, 20 kilograms of organic silicone defoamers, 5 kilograms of silicone based flow agents, 10 kilograms of silane resin acceptor kh-550s mix, and can make the used auxiliary agent of present embodiment.
Press table 1 corresponding component and add-on, in novolac epoxy, add toughner and reactive thinner, treat to add filler, pigment and auxiliary agent again after compatible fully, milling to mix makes the A component.
Take by weighing 80 kilograms of 20 kilograms of daiamid epoxy curing agents and polynary amine curing agents, mix, promptly make the B component.
Said polynary amine curing agent is the T31 solidifying agent.
A component and B component are mixed, and wherein, the mass ratio of A component and B component is 80:20, can make the steel pipe welded junction part high-temperature anticorrosion that is used for of the present invention and use non-solvent epoxy priming paint.
Embodiment 3
Take by weighing: 15 kilograms of urethane, 5 kilograms of aerosils, 12 kilograms of organic silicone defoamers, 13 kilograms of silicone based flow agents, 5 kilograms of silane resin acceptor kh-550s mix, and can make the used auxiliary agent of present embodiment.
Press table 1 corresponding component and add-on, in novolac epoxy, add toughner and reactive thinner, treat to add filler, pigment and auxiliary agent again after compatible fully, milling to mix makes the A component.
Take by weighing 20 kilograms of 80 kilograms of daiamid epoxy curing agents and polynary amine curing agents, mix, promptly make the B component.
Said polynary amine curing agent is the TZ-500 pnenolic aldehyde amine hardener.
A component and B component are mixed, and wherein, the mass ratio of A component and B component is 50:50, can make the steel pipe welded junction part high-temperature anticorrosion that is used for of the present invention and use non-solvent epoxy priming paint.
Embodiment 4
Take by weighing: 12 kilograms of urethane, 3 kilograms of aerosils, 8 kilograms of organic silicone defoamers, 15 kilograms of silicone based flow agents, 3 kilograms of silane resin acceptor kh-550s mix, and can make the used auxiliary agent of present embodiment.
Press table 1 corresponding component and add-on, in novolac epoxy, add toughner and reactive thinner, treat to add filler, pigment and auxiliary agent again after compatible fully, milling to mix makes the A component.
Take by weighing 60 kilograms of 40 kilograms of daiamid epoxy curing agents and polynary amine curing agents, mix, promptly make the B component.
Said polynary amine curing agent is 701 solidifying agent.
A component and B component are mixed, and wherein, the mass ratio of A component and B component is 70:30, can make the steel pipe welded junction part high-temperature anticorrosion that is used for of the present invention and use non-solvent epoxy priming paint.This priming paint can be brushed in steel surface, records its snappiness after coating is solidified and reaches 3mm, and resistance to impact shock reaches more than the 45kgcm, and paint film adhesion reaches 1 grade.
Snappiness is pressed the GB/T1731-93 standard method and is measured, and carries out under the relative humidity condition of 23 ℃ ± 2 ℃ temperature and 50 ± 5% with crooked appearance, and model after the drying, inserts instrument and makes painted surface towards seat board, subsequently bending reposefully in advance.After the bending, check model immediately, model tested than small dia successively, peel off until film cracking or from base plate, again on a new model, with same diameter of axle repetitive operation, prove this result after, the diameter of axle that record makes film cracking at first or peels off.
Resistance to impact shock is pressed the GB/T1732-93 standard method and is measured.
The steel pipe welded junction part high-temperature anticorrosion that is used for that embodiment 1-4 is prepared carries out performance test with non-solvent epoxy priming paint, specifically detects data and sees table 2.
Table 2: embodiment 1-4 primer performance test chart
| ? | 1 | 2 | 3 | 4 |
| Snappiness Φ mm | 3 | 3 | 2.5 | 3 |
| Resistance to impact shock kgcm | >; 45 | 40 | >; 45 | >; 45 |
Embodiment 3 prepared priming paint and commercially available epoxy resin primers are carried out performance comparison, and concrete data are seen table 3 and table 4.
The present invention adopts a kind of epoxy resin as film forming material; Add toughner, reactive thinner, solidifying agent, other auxiliary agents and/or auxiliary material as required; Ratio adjustment prescription in different grinds and stirs a kind of novel solvent-free fire resistant anticorrosive paint of acquisition.Very convenient during this coating application, two components are stirred promptly can brush, the resistance to impact shock of coating after steel pipe solidifies can reach more than the 32Kgcm.
Table 3
| Project | Commercially available epoxy resin primer | Embodiment 3 priming paint |
| Conventional film (20 μ m), room temperature is done solid work the time | 24h | 12h |
| Former film, room temperature is done solid work the time | 168h | 28h |
| Conventional film (20 μ m), drying time | 120℃ 1h | 60℃ 30min |
| Former film, drying time | 120℃ 3h | 60℃ 60min |
Table 4
| Project | Commercially available epoxy resin primer | The priming paint of embodiment 3 |
| 80 ℃/48h of cathodic disbonding | 5-8mm | 3mm |
| 80 ℃/28d of cathodic disbonding | >; 25 | 14 |
| 80 ℃/120d of hot-water soak | Under the layer water arranged, come off | Nothing is bubbled, nothing comes off |
| Salt fog resistance | 168-300h is through one-level | Pass through one-level more than the 1000h |
| Oil-proofness | The 5-48h outward appearance does not have considerable change | The 48-168h outward appearance does not have considerable change |
| Petrol-resistance | 8-16h is non-foaming, wrinkle resistant | 16-40h is non-foaming, wrinkle resistant |
| Acid resistance | 7-10h | 20-30h |
| Alkali resistance | 7-10h | 20-30h |
| Humidity resistance | 96-120h | 120-300h |
Claims (10)
1. one kind is used for steel pipe welded junction part high-temperature anticorrosion and uses non-solvent epoxy priming paint, it is characterized in that: by mass percentage, form by the A component of 50-80% and the B component of 20-50%,
Wherein, said A component is made up of following each component: novolac epoxy 30-80 part by weight; Toughner 2-20 part; Filler 15-50 part; Pigment 1-5 part; Reactive thinner 5-10 part; Auxiliary agent 0.2-5 part;
Said auxiliary agent is made up of following component by weight: dispersion agent 10-20 part, anti-settling agent 0-10 part, skimmer 5-20 part, flow agent 5-20 part, coupling agent 0-10 part;
Said B component by mass percentage, is made up of 20-80% daiamid epoxy curing agent and the many first amine curing agents of 20-80%.
2. the steel pipe welded junction part high-temperature anticorrosion that is used for as claimed in claim 1 is used non-solvent epoxy priming paint, it is characterized in that:
Said auxiliary agent is made up of following component by weight: dispersion agent 10-20 part, anti-settling agent 1-10 part, skimmer 5-20 part, flow agent 5-20 part, coupling agent 1-10 part.
3. the steel pipe welded junction part high-temperature anticorrosion that is used for as claimed in claim 2 is used non-solvent epoxy priming paint, and it is characterized in that: said dispersion agent is a urethane.
4. the steel pipe welded junction part high-temperature anticorrosion that is used for as claimed in claim 2 is used non-solvent epoxy priming paint, and it is characterized in that: said anti-settling agent is an aerosil.
5. the steel pipe welded junction part high-temperature anticorrosion that is used for as claimed in claim 2 is used non-solvent epoxy priming paint, and it is characterized in that: said skimmer is the organic silicone defoamer.
6. the steel pipe welded junction part high-temperature anticorrosion that is used for as claimed in claim 2 is used non-solvent epoxy priming paint, and it is characterized in that: said flow agent is silicone based flow agent.
7. the steel pipe welded junction part high-temperature anticorrosion that is used for as claimed in claim 2 is used non-solvent epoxy priming paint, and it is characterized in that: said coupling agent is an organo silane coupling agent.
8. use non-solvent epoxy priming paint like each described steel pipe welded junction part high-temperature anticorrosion that is used among the claim 1-7, it is characterized in that: said toughner is a kind of or its mixture in thio resin, LNBR and the urethane.
9. use non-solvent epoxy priming paint like each described steel pipe welded junction part high-temperature anticorrosion that is used among the claim 1-7, it is characterized in that: said filler is a kind of or its mixture in permanent white, aluminium triphosphate, mica powder, lime carbonate, silit, talcum powder, aerosil and the Zinic stearas.
10. use non-solvent epoxy priming paint like each described steel pipe welded junction part high-temperature anticorrosion that is used among the claim 1-7, it is characterized in that: said reactive thinner is a kind of or its mixture in diglycidylether, polyglycidyl ether, epoxy propane butyl ether, propylene oxide phenyl ether, diepoxy propane ethyl ether or the three propylene oxide propyl ethers.
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