CN1594473A - Coal tar asphalt anti-corrosive paint - Google Patents
Coal tar asphalt anti-corrosive paint Download PDFInfo
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- CN1594473A CN1594473A CN 200310114087 CN200310114087A CN1594473A CN 1594473 A CN1594473 A CN 1594473A CN 200310114087 CN200310114087 CN 200310114087 CN 200310114087 A CN200310114087 A CN 200310114087A CN 1594473 A CN1594473 A CN 1594473A
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- coal
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- coal tar
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Abstract
The invention discloses an externally used antiseptic coal-tar asphalt paint for ground buried metal pipes, wherein coal-tar oil is used as the main film forming substance, waste rock powder and coal powder are used as padding medium, the constituents of the paint (by weight portion) include coal tar 60-75%, powdered ore 10-20%, flotation washed coal powder 7-15%.
Description
Technical field the present invention relates to a kind of protective system, and especially a kind of is main film forming substance with the coal-tar pitch, is the buried metal pipeline external application anti-corrosion asphalt paint of filled media with breeze, coal dust.
Background technology metal corrosion and protection science is an integrated technology science that grows up 1930's, has become an independently subject at present, and in continuous development.Metallic corrosion is the metallic substance destruction of taking place under various environmental activities and rotten, spreads all over all departments of national economy, brings massive losses to national economy.According to the investigation of industrially developed country, the financial loss that causes because of corrosion every year accounts for the 2%-4% of gross national product, and the loss of corroding (generally being iron and steel) at British Metal reaches several hundred million pounds every year.According to T.N.NGUYEN etc., the loss that the U.S. causes because of metallic corrosion every year account for gross national product (GNP) 4.2%.The financial loss that causes because of corrosion in China every year at least two 10,000,000,000 Renminbi.Do corrosion prevention work well, be not simple technical problem, but be related to resources conseravtion, save energy is saved material, and the protection environment guarantees ordinary production and personnel safety, a series of important social and economic problems such as development new technology.
All there is a large amount of water, vapour, pipe laying every year in China in provided underground, and these metallic conduits are because buried in soil, thus the easiest corrosion that is subjected to moisture in the soil, chlorion, sulfate ion, microorganism, plant roots and stems etc. with penetrate.The outer wall of buried metal pipeline is anticorrosion in recent years more and more comes into one's own, and associated various heavy-duty coatings have also obtained R and D energetically.The protection against corrosion of buried metal pipeline is not only for prolonging this simple purpose of pipeline life, also having how prior for many-sided considerations such as safety, environment.The buried oil pipeline line of the oily yard plant area that struggles against of Hunan Province's refinery the perforation leakage of oil occurs once because of microbiological corrosion, and reach 7-8 every year, has brought enormous economic loss for this factory.If when the fluid in the pipe is inflammable substance or toxic substance, also can cause serious accidents such as calamity and blast.Nanjing six directions fertilizer plant causes blast stopping production accident once because of equipment and pipeline corrosion.Certain storage tank of NORTHWEST CHINA area, the maintenance though outer wall has been painted, but inwall is exposed, aqueous vapor corrosion steel plate in jar, make the steel plate corrosion attenuation, finally cause workman steel plate when tank deck is worked to wear out the generation fatal accident, the leakage of oil incident of leaking that the pipeline pitting corrosion is caused is too numerous to enumerate especially, this shows that pipeline corrosion protection is extremely important, we must draw attention.
The corrosion protection coating of domestic most of buried pipelines or underground works is based on bituminous composition at present.Coal tar and pitch have favorable waterproof property, are widely used in the anti-production of corroding coating of waterproof.Pitch type coating is cheap because of it, has good acid and alkali-resistance, weather-proof and water resistance, once once is being subjected to people's favor, but exists low, the poor flexibility of intensity, can not satisfy the requirement of anti-corrosion of metal under the heavy corrosion environment fully.So the bituminous varnish of modifications such as urethane, Resins, epoxy had appearred afterwards, through the bituminous composition of modification with its intensity height, advantages such as cohesive force is strong, water-intake rate is low, good insulation preformance, the erosion of anti-bacterium were once leading on some heavy constructions at home.But epoxy coal asphalt paint exists the construction temperature height, twines Bu Shiyi generation contraction, softening, the easy oil impregnate of envrionment temperature Gao Shiyi, and production cost height even problems of crack seldom adopt now.The external sixties begin developing water soluble resin rust-inhibiting paint, develop again in recent years and water-soluble acrylic acid ester resin rust-inhibiting paint, but the water-soluble anti-rust lacquer costs an arm and a leg, lack of material, not as the solvent borne rust-inhibiting paint, the water-soluble anti-rust of supply lacquer exists poor adhesive force, hardness of paint film deficiency in the market at aspects such as drying varniss speed, levelling property, hardness, paint film is impaired easily during backfill, cause this lacquer short work-ing life, particularly coatingsurface is contaminated easily, is difficult to clean.Coal pitch enamel disclosed in this invention is a filled media with breeze, coal dust, the advantage that not only has coal tar coating and had, and very big improvement has all been arranged at hardness of paint film, intensity, elasticity, aspect such as corrosion-resistant.
Patent of invention 01138886.2 also discloses a kind of petroleum pitch metal anti-corrosion paint, and the main component of this lacquer is petroleum pitch, dimethylbenzene, rosin, blue or green oil.Though this coating strong adhesion cleans easily, effectively secluding air and water should be not so good as coal pitch enamel by lacquer aspect microbial corrosion resistance.
Patent of invention 97105378.2 also discloses a kind of anti-corrosion asphalt paint, and the main component of this lacquer is pitch, gasoline, though this lacquer manufacturing process is simple, antiseptic property is relatively poor relatively, and makees solvent with gasoline and bring certain danger for manufacturing and construction.
It is the bituminous composition of weighting agent with the electric furnace dust that patent of invention 90108533.2 also discloses a kind of, and the main component of this coating is petroleum pitch, styrene-butadiene rubber(SBR), chloroprene rubber, electric furnace dust and organic solvent.This coating biggest advantage is the good mechanical property of filming, and can be good at waterproof, freeze proof.But this coating manufacture process complexity needs special processing unit.
Summary of the invention the purpose of this invention is to provide a kind of strong adhesion, good mechanical property, and cost is low, and manufacturing process is simple, the anticorrosion coal tar pitch lacquer of the buried metal pipeline external application of favorable anti-corrosion effect.
The invention belongs to coating composition, specifically be a kind of coal-tar pitch antifouling paste, each composition weight proportioning of forming this lacquer is: (1) coal tar (containing 50% above pitch) 60%～75% (2) breeze (spoil is levigate to 300 orders) 10%～20% (3) floatation clean coal powder 7%～15% (levigate to 250 orders) (4) isocyanic ester (TDI) 8～20%.This lacquer is characterised in that with coal tar to be main film forming substance, is filled media with breeze, coal dust.
The filmogen that the present invention adopts is a coal tar, and coal tar is the byproduct of coke-oven plant, at my annual production tons up to a million, form extremely complexity, can obtain multiple cut and pitch through fractionation by distillation, its medium pitch accounts for 50% (massfraction, down together), the component above 1% has 12 kinds, as naphthalene 8%～12%, alpha-methyl-naphthalene, fluorenes, anthracene 1.2%～1.8%, phenanthrene 4.5%～5.0%, carbazole 1.5% etc., all the other components are less than 1%, although content seldom, all be extremely useful industrial chemicals.Coal-tar pitch mainly is made up of aromatic hydrocarbon substance, and chemical is very stable, and petroleum pitch mainly is made up of alkanes substance, and chemical is relatively unstable, as time passes, its molecule easily degrades, wears out etc.As previously mentioned in the coal tar because of containing a large amount of phenol, anthracene, quinone, these contain phenolic compound for plant and bacterium, are the toxin that suppresses its breeding and growth, can resist plant roots and stems and grow into, anti-bacterium corrodes.The coal tar water-intake rate is very low on the other hand, and generally about 0.3-0.5%, plant can not adhere to its growth, thereby makes buried steel pipe obtain good protection.So should coat with lacquer external application protective system, have superior protection and antiseptic property as buried metal pipeline and boats and ships.
The filled media that the present invention adopts is spoil powder and floatation clean coal powder, coal gangue is the waste in coal mining, the washing process, contain multiple product material raw materials such as pyrite, bauxite, poly aluminium chloride, can make spoil brick, cement, gas concrete, also can be used to generating etc.The coal gangue of piling up the mountain has brought serious pollution to environment in recent years, the open comprehensive utilization coal gangue of giving of the present invention, and turning waste into wealth provides a good approach.Coal is the fuel that we are familiar with, and sees everywhere.We know that the antiseptic property of conventional bituminous composition and coal tar pitch class coating is fabulous, but exist the susceptibility to temperature, and promptly temperature is low becomes fragile, the temperature height trickling.The present invention is a filled media with spoil powder, coal dust creatively, through the pyroreaction modification, can overcome above-mentioned these shortcomings, improves its softening temperature, increases its toughness, has greatly widened temp. variation resistant scope and comprehensive anticorrosive performance.Coal-tar pitch coating after the modification has light and the excellent erosion resistance that resembles enamel-sample, has again the iron and steel good adhesive.The spoil powder adds wherein as filled media in addition, and it can significantly increase the hardness of paint film, strengthens the plasticity and the physical strength of paint film.
The present invention also uses 10～20% isocyanic ester (TDI), and this is in order to strengthen the sticking power of paint film to the metallic surface, to accelerate its curing speed.On film curing mechanism, different blue or green acidic group is as curing reaction group, because of containing 1% the reactive hydrogen of having an appointment in the coal tar, the component of hydroxyl structures such as 1%～3% amine and phenol, anthracene, quinone, so different blue or green acidic group can be directly and coal tar uniform curing cross-linking reaction takes place, make the curing cross-linked three-dimensional, thereby strengthen the intensity and the hardness of paint film, improve the mechanical property of paint film.
The present invention is achieved in that it at first is raw-material preparation, comprises spoil being milled down to below 300 orders standby, and fine coal powder is behind thermal dehydration, and it is following standby to be milled down to 250 orders, is ready to coal tar and isocyanic ester.Next is the preparation of paint finished product: earlier coal tar is joined in the agitator of sealing (agitator must be provided with device for recovering tail gas), start agitator, persistently overheating to more than 160 ℃, vacuum hydro-extraction and remove low in the coal tar and heated up in a steamer a component and part sour oil 5 minutes, add fine coal powder then, slowly evenly add and continuous the stirring, maintain the temperature at more than 160 ℃ after adding and continue and heated 40 minutes, sour oil and yellow coal gas in the coal are removed in coal dust is fully softening, dispersion, wetting under the condition of high temperature.After heating in 40 minutes, the method of the described interpolation coal dust of front face is the same adds the spoil powder again in the molten mass of coal tar and coal dust, make fully mixing, the dispersion under the state of hot mastication of spoil powder and coal dust, wetting and be dissolved in wherein by coal tar fully, after the spoil powder adds, and then add isocyanic ester, add isocyanic ester after, whole mixed melting body temperature degree is remained on more than 160 ℃ continue to boil 1 hour.Stop heating at last, when temperature drops to more than 70 ℃ below 100 ℃, can carry out heat and be coated with construction, once brush and to obtain paint film thickness 200 ± 5um.
The present invention compares with existing coal-tar pitch class coating, has improved the softening temperature of paint, has widened the temperature resistant range of paint film, is that filled media is significantly improved hardness of paint film with the spoil powder, and makes paint film have shiny black gloss and good elasticity.
Embodiment is following specifically sets forth practical application of the present invention by several embodiment.
Embodiment 1:
Component title: weight %
Coal tar (coke-oven plant, Taiyuan) 64
Spoil powder (Taiyuan Coal Preparation Plant, 300 orders are following) 14
Floatation clean coal powder (Taiyuan Coal Preparation Plant, 250 orders are following) 12
Isocyanic ester (TDI) 10
Amount to 100
The coating model that example 1 is done according to the present invention, data are as follows after testing:
| Project | Index | Test method | |
| Viscosity | 40～70 | ????GB1723-79 | |
| Outward appearance | Smooth | ????GB1729-79 | |
| Gloss | Light | ????GB1729-79 | |
| Time of drying | Surface drying (h) | ＜0.3-2 | ????GB1728-79 |
| Do solid work (h) | ＜2-24 | ????GB1728-79 | |
| Shock strength (kg.cm) | ≥50 | ????GB1732-79 | |
| Hardness | 4～5H | ????GB/T6739-86 | |
| Sticking power (level) | 2 | ????GB1720-79 | |
| Resistance to salt water (5%NaCL) | Non-foaming, do not come off | ????GB1733-79 | |
| Anti-sulfuric acid (50%H 2SO 4)＞6 month | Non-foaming, do not come off | ????GB1763-79 | |
| Salt tolerant acid (18%HCL)＞6 month | The same | ????GB1763-79 | |
| Alkaline-resisting (25%NaOH)＞6 month | The same | ??GB1763-79 |
| Oil-proofness | No change | ??JISK5664-1983 |
| Anti-solvent, water tolerance＞6 month | Non-foaming, do not come off | ??GB1763-79 |
| Water-intake rate (%) | ≤0.3 | ??SYJ28-87 |
Embodiment 2:
Component title: weight %
Coal tar (coke-oven plant, Taiyuan) 66
Spoil powder (Taiyuan Coal Preparation Plant, 300 orders are following) 13
Floatation clean coal powder (Taiyuan Coal Preparation Plant, 250 orders are following) 11
Isocyanic ester (TDI) 10
Amount to 100
Embodiment 3:
Component title: weight %
Coal tar (coke-oven plant, Taiyuan) 67
Spoil powder (Taiyuan Coal Preparation Plant, 300 orders are following) 13
Floatation clean coal powder (Taiyuan Coal Preparation Plant, 250 orders are following) 10
Isocyanic ester (TDI) 10
Amount to 100
Claims (4)
1. coal pitch enamel, it is characterized in that: being main film forming substance with coal tar, is filled media with spoil powder, coal dust; Each weight percentages of components is:
Coal tar 60%～75%;
Breeze 10%～20%;
Floatation clean coal powder 7%～15%;
Isocyanic ester (TDI) 8%～20%;
More than each component sum be 100%.
2. coal pitch enamel according to claim 1 is characterized in that coal tar medium pitch weight percent is 50%～75%.
3. according to the described coal pitch enamel of claim 1, it is characterized in that spoil powder degree is below 300 orders.
4. according to the described coal pitch enamel of claim 1, it is characterized in that floatation clean coal powder degree is below 250 orders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101140877A CN100343353C (en) | 2003-11-12 | 2003-11-12 | Coal tar asphalt anti-corrosive paint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101140877A CN100343353C (en) | 2003-11-12 | 2003-11-12 | Coal tar asphalt anti-corrosive paint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1594473A true CN1594473A (en) | 2005-03-16 |
| CN100343353C CN100343353C (en) | 2007-10-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003101140877A Expired - Fee Related CN100343353C (en) | 2003-11-12 | 2003-11-12 | Coal tar asphalt anti-corrosive paint |
Country Status (1)
| Country | Link |
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| CN (1) | CN100343353C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101906266B (en) * | 2009-06-03 | 2012-07-04 | 索慈利 | Modified polyurethane asphalt corrosion-resistant coating |
| CN105153767A (en) * | 2015-10-28 | 2015-12-16 | 苏州奥莱鑫建材有限公司 | Method for preparing roof waterproof coating |
| CN105199599A (en) * | 2015-09-21 | 2015-12-30 | 太仓市金锚新材料科技有限公司 | Seal coating and preparation method thereof |
| CN106590421A (en) * | 2016-12-13 | 2017-04-26 | 南京悠谷知识产权服务有限公司 | High-temperature-resistant paint for aeronautical materials and preparation method of high-temperature-resistant paint |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1014414B (en) * | 1989-12-18 | 1991-10-23 | 北京大学 | Compound of silicon and aluminium and its processing method and use |
| CN1058792A (en) * | 1990-08-06 | 1992-02-19 | 张炼 | A kind of prescription of anti-corrosive and waterproof paint and manufacturing |
| CN1029740C (en) * | 1991-12-17 | 1995-09-13 | 廊坊市安次区光明新技术开发研究所 | Modified coal pitch enamel and its processing |
-
2003
- 2003-11-12 CN CNB2003101140877A patent/CN100343353C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101906266B (en) * | 2009-06-03 | 2012-07-04 | 索慈利 | Modified polyurethane asphalt corrosion-resistant coating |
| CN105199599A (en) * | 2015-09-21 | 2015-12-30 | 太仓市金锚新材料科技有限公司 | Seal coating and preparation method thereof |
| CN105153767A (en) * | 2015-10-28 | 2015-12-16 | 苏州奥莱鑫建材有限公司 | Method for preparing roof waterproof coating |
| CN106590421A (en) * | 2016-12-13 | 2017-04-26 | 南京悠谷知识产权服务有限公司 | High-temperature-resistant paint for aeronautical materials and preparation method of high-temperature-resistant paint |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100343353C (en) | 2007-10-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenzhen Oceanpower Chemical Technology Co., Ltd. Assignor: Haichuan Industry Co., Ltd., Shenzhen Contract fulfillment period: 2008.8.9 to 2015.1.17 contract change Contract record no.: 2008440000274 Denomination of invention: Coal tar asphalt anti-corrosive paint Granted publication date: 20071017 License type: Exclusive license Record date: 20081014 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.8.9 TO 2015.1.17; CHANGE OF CONTRACT Name of requester: SHENZHEN HAICHUAN CHEMICAL TECHNOLOGY CO., LTD. Effective date: 20081014 |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071017 Termination date: 20161112 |