CN101284969B - Solvent-free epoxy coal tar heavy duty anticorrosive coating and preparation process thereof - Google Patents
Solvent-free epoxy coal tar heavy duty anticorrosive coating and preparation process thereof Download PDFInfo
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Abstract
The invention relates to solvent-free epoxy coal tar heavy anticorrosive paint and a process for making the same. The solvent-free epoxy coal tar heavy anticorrosive paint relates to the anticorrosive paint technical field and comprises two compositions A and B, wherein the composition A comprises 20 to 50 unit mass of epoxide resin, 10 to 15 unit mass of reactive diluent, 0.5 to 2 unit mass of rheological additive, 0.5 to 2 unit mass of defoaming agent, 0.5 to 2 unit mass of flatting agent, 1 to 3 unit mass of wetting dispersant, 0.5 to 2 unit mass of gas phased silicon dioxide and 36 to 55 unit mass of mineral filling material; the composition B comprises 15 to 20 unit mass of amine curing agent, 25 to 30 unit mass of coal tar, 0.5 to 2 unit mass of defoaming agent, 0.3 to 2 unit mass of flatting agent, 0.5 to 2 unit mass of wetting dispersant, 0.7 to 2 unit mass of gas phased silicon dioxide and 45 to 55 unit mass of mineral filling material.
Description
Technical field
The present invention relates to the impregnating material technical field, especially a kind of reinforced concrete pipiline, the solvent-free epoxy coal tar heavy duty anticorrosive coating and manufacturing process thereof in underground steel pipeline, boats and ships, harbour, bridge, oceanographic engineering field under water of being applicable to.
Background technology
Solvent-borne type epoxy coal tar pitch lacquer was just put on market at beginning of the seventies late 1960s, because its cost performance height, all underground under water Steel Structure Works nearly all adopt this coating protection, was still using so far; Actual use through more than 30 years shows that solvent-borne type epoxy coal tar pitch coats with lacquer its application thickness between 600～800um, and matches with impressed current cathodic protection, and when being used for the ocean steel construction engineering, its preservative effect can be for 10～15 years; Be used for buried steel pipeline, the protection effect can reach more than 20 years.Existing epoxy coal tar pitch coats with lacquer the technical problem underlying that exists, and the one, contain solvent, contaminate environment wastes energy; The 2nd, supercoat is because the volatilization of solvent produces pin hole, thus its preservative effect, chemical-resistant stability, insulativity and sticking power, therefore wear resistance, performances such as shock resistance all reduce; Three be an application thin (80～120um), time of drying long (surface drying 4h does solid work 18～24h, completely solidified 4～7d), thereby cause the engineering time long, inefficiency, labour intensity is big.
Summary of the invention
Above-mentioned shortcoming at existing solvent-borne type epoxy coal tar heavy duty anticorrosive coating, the invention provides a kind of thixotropy strong and solvent-free epoxy coal tar heavy duty anticorrosive coating and manufacturing process thereof that can application under the situation of concrete initial set and hygrometric state, this solvent-free epoxy coal tar heavy duty anticorrosive coating has not only improved operating efficiency and quality greatly, shortened construction period, reduced labour intensity, and this coating of processing and manufacturing only needs a high speed dispersor to get final product, removed the ball milling operation of producing traditional coating from, simplify technical process, improved advantages such as production work efficiency.
Technical scheme of the present invention is as described below:
A kind of solvent-free epoxy coal tar heavy duty anticorrosive coating, it comprises two kinds of components of first, second:
The first component comprises: the reactive thinner of the Resins, epoxy of 20～50 mass units, 10～15 mass units, 0.5 the auxiliary rheological agents of～2 mass units, 0.5 the defoamer of～2 mass units, 0.5 the flow agent of～2 mass units, the wetting dispersing agent of 1～3 mass unit, the mineral-filled material of the aerosil of 0.5～2 mass unit and 36～55 mass units;
Component B comprises: the amine curing agent of 15～20 mass units, the coal tar of 25～30 mass units, 0.5 the defoamer of～2 mass units, 0.3 the flow agent of～2 mass units, 0.5 the wetting dispersing agent of～2 mass units, the mineral-filled material of the aerosil of 0.7～2 mass unit and 45～55 mass units.
Make the technology of described solvent-free epoxy coal tar heavy duty anticorrosive coating, wherein, the manufacturing process of first component is: earlier Resins, epoxy, reactive thinner, wetting dispersing agent, defoamer, flow agent are put into high speed dispersor and stirred, add aerosil and auxiliary rheological agents again and continue to be stirred to and mix; Then, carry out high speed dispersion after adding mineral-filled material, carry out stirring at low speed again, then, check its viscosity; If viscosity is defective, continue stirring at low speed, it is qualified to be verified up to viscosity; If viscosity is qualified, filter the back first component finished product.
Make the technology of described solvent-free epoxy coal tar heavy duty anticorrosive coating, wherein, the manufacturing process of component B is: earlier coal tar, defoamer, flow agent, wetting dispersing agent are put into high speed dispersor and stirred, add aerosil again and continue to be stirred to and mix; Then, carry out high speed dispersion after putting into mineral-filled material, carry out stirring at low speed after putting into amine curing agent again; Detect the viscosity of mixture then, if viscosity is defective, proceed stirring at low speed, it is qualified to be verified up to viscosity; If viscosity is qualified, filter the back the component B finished product.
Spray the method for described solvent-free epoxy coal tar heavy duty anticorrosive coating, wherein, first, the component B of the solvent-free epoxy coal tar heavy duty anticorrosive coating that volume is identical is respectively charged in the corresponding spray chamber of two component high pressure airless spray equipments and sprays.
The present invention will reach following positively effect after adopting technique scheme:
Solvent-free epoxy coal tar heavy duty anticorrosive coating provided by the present invention does not contain solvent, is a kind of environmental protection coating material of environmentally friendly, resource-conserving, can not produce the solvent evaporates pin hole, thereby improve preservative property, chemical proofing and the insulativity of coating; It has adopted mineral-filled material, has improved toughness, wear resistance and the shock resistance of coating, and has solved the problem of thick filmization; Adopt amine curing agent, curing speed is fast, can carry out application when the concrete duct hygrometric state, and remove the operation of the maintenance of watering from.During application, adopt two component airless spraying technologies, improved operating efficiency and quality greatly, shortened construction period, reduced labour intensity.This coating of processing and manufacturing only needs a high speed dispersor to get final product, and has removed the ball milling operation of producing traditional coating from, has simplified technical process, has improved the production work efficiency.
Description of drawings
Fig. 1 is for making the process flow sheet of first component in the solvent-free epoxy coal tar heavy duty anticorrosive coating;
Fig. 2 is for making the process flow sheet of component B in the solvent-free epoxy coal tar heavy duty anticorrosive coating;
Fig. 3 is the Steel Concrete base material sectional view of application solvent-free epoxy coal tar heavy duty anticorrosive coating coating.
Embodiment
Embodiment 1:
A kind of solvent-free epoxy coal tar heavy duty anticorrosive coating, comprise the first and second two kinds of components, wherein, the first component comprises: the reactive thinner of the low-molecular-weight epoxy resin of 35 mass units, 10 mass units, 0.5 the auxiliary rheological agents of mass unit, the defoamer of 0.5 mass unit, the flow agent of 0.5 mass unit, the wetting dispersing agent of 1 mass unit, the mineral-filled material of the aerosil of 0.5 mass unit and 52 mass units;
Component B comprises: the amine curing agent of 20 mass units, the coal tar of 30 mass units, the defoamer of 0.5 mass unit, the flow agent of 0.3 mass unit, 0.5 the wetting dispersing agent of mass unit, the mineral-filled material of the aerosil of 0.7 mass unit and 48 mass units.
Embodiment 2:
A kind of solvent-free epoxy coal tar heavy duty anticorrosive coating, comprise the first and second two kinds of components, wherein, the first component comprises: the reactive thinner of the low-molecular-weight epoxy resin of 36 mass units, 13 mass units, 1.2 the auxiliary rheological agents of mass unit, the defoamer of 1.1 mass units, the flow agent of 1.1 mass units, 1.5 the wetting dispersing agent of mass unit, the mineral-filled material of the aerosil of 1.1 mass units and 45 mass units;
Component B comprises: the amine curing agent of 18 mass units, the coal tar of 28 mass units, the defoamer of 1.3 mass units, the flow agent of 1.2 mass units, 1.2 the wetting dispersing agent of mass unit, the mineral-filled material of the aerosil of 1.3 mass units and 49 mass units.
Embodiment 3:
A kind of solvent-free epoxy coal tar heavy duty anticorrosive coating, comprise the first and second two kinds of components, wherein, the first component comprises: the reactive thinner of the low-molecular-weight epoxy resin of 40 mass units, 12 mass units, the auxiliary rheological agents of 2 mass units, the defoamer of 2 mass units, the flow agent of 2 mass units, the wetting dispersing agent of 3 mass units, the mineral-filled material of the aerosil of 2 mass units and 37 mass units;
Component B comprises: the amine curing agent of 20 mass units, the coal tar of 30 mass units, the defoamer of 2 mass units, the flow agent of 2 mass units, the wetting dispersing agent of 2 mass units, the mineral-filled material of the aerosil of 2 mass units and 42 mass units.
Wherein, the mineral-filled material described in the embodiment 1,2,3 adopts the mineral-filled material of siloxane bond class, and amine curing agent adopts the mannich base solidifying agent.
The technology of processing and manufacturing solvent-free epoxy coal tar heavy duty anticorrosive coating is as described below:
The manufacturing process flow of first component is as shown in Figure 1: earlier with the Resins, epoxy of respective quality unit, reactive thinner, wetting dispersing agent, defoamer, flow agent is put into high speed dispersor and is stirred, then adding aerosil and auxiliary rheological agents continues to be stirred to and mixes, added the mineral-filled material high speed dispersion of siloxane bond class then 30～40 minutes, its viscosity of check after the stirring at low speed that is no more than 10 minutes again, wherein the viscosity of first component need reach 10000～20000cp (in 25 ℃ ± 1 ℃ scope), if viscosity is defective, then proceed stirring at low speed, detected qualified up to viscosity; After viscosity is qualified, with 100 purpose nylon wire elimination larger particles first component finished product.
The manufacturing process flow of component B is as shown in Figure 2: earlier with coal tar, defoamer, flow agent, wetting dispersing agent is put into high speed dispersor and is stirred, adding aerosil again continues to be stirred to evenly, then put into behind the mineral-filled material of siloxane bond class high speed dispersion 30～40 minutes, put into the stirring at low speed that the mannich base solidifying agent is no more than 10 minutes again, detect the viscosity of mixture then, wherein, the viscosity of component B need reach 30000～40000cp (in 25 ℃ ± 1 ℃ scope), if viscosity is defective after testing, proceed stirring at low speed, detected qualified up to viscosity; After viscosity is qualified after testing, with 100 purpose filtering net elimination larger particles the component B finished product.
When spraying described solvent-free epoxy coal tar heavy duty anticorrosive coating, only need solvent-free epoxy coal tar heavy duty anticorrosive coating first component, the component B that volume is identical to be respectively charged in the corresponding spray chamber of two component high pressure airless spray equipments, utilize this spraying machine directly to spray, recommend application together.
Figure 3 shows that on Steel Concrete base material 1 surface and be coated with the sectional view that one solvent-free epoxy coal tar heavy duty anticorrosive coating coating 2 is housed.
Do not contain solvent in the coating of the present invention, overcome existing solvent-borne type epoxy coal tar pitch lacquer contaminate environment, waste energy, giving films causes the disadvantage of pin hole, thereby improved coating to the isolated property of various corrosive mediums, to the insulativity and the chemical-resistant stability of stray current, the mineral-filled material of siloxane bond class of Cai Yonging has very strong wear resistance, shock resistance and resistance to pressure in addition, thereby has more strengthened the physical strength of coating; The mineral-filled strip of described siloxane bond class has the silanol base, has hydrogen bond action, be the 3 D stereo reticulated structure, its surface has electrostatic force, more strengthened the thixotroping effect between the mineral-filled material, thereby coating thick film problem is resolved, the results showed, the coating thickness of an application coating of the present invention can reach more than the 1000um not sagging.
For solving the slow problem of traditional coating curing speed, coating of the present invention has adopted the amine curing agent (as the mannich base solidifying agent that adopts among the embodiment) that can play self-catalysis, have electronegativity on the nitrogen-atoms of this amine curing agent, belong to nucleophilic reagent, with the Resins, epoxy react with time, have the lower carbon atom of cloud density that electronegative nucleophilic reagent is attacked positively charged in the oxirane ring, cause the C-O bond rupture, make the epoxy bond ring-opening polymerization, thereby make paint solidification; In addition, itself also has electronegative hydroxyl this amine curing agent, so more strengthened the aggressivity to positively charged carbon atom in the oxirane ring, has more quickened the ring-opening reaction of epoxy group(ing), thereby has quickened the solidification rate of coating; This coating is solventless coatings in addition, eliminated the space steric effect of solvent in the solvent based coating, also because two component high pressure airless spray equipments itself have automatic heating system, thus more quickened the curing speed of coating, thus solved the tachy steroling problem of coating.
For the application problem of reinforced concrete pipiline under initial set and hygrometric state situation, at first, coating of the present invention does not have solvent evaporates, can not influence cement aquation, secondly, produced great amount of hydroxy group behind Resins, epoxy in the coating and the solidifying agent react with, hydroxyl is a hydrophilic radical, although so the concrete pipe surface is in the initial set dampness, coating still can be attached to concrete surface; The amount of preparation water is the needed amount of hydrated cementitious just in the concrete, there is not unnecessary water, thus can not produce destructive vapour pressure, even produce a spot of steam, its pressure is also less than the sticking power between coating and the concrete, so can not influence adhesive force of coatings; Once more, coating is directly application under concrete initial set and hygrometric state situation, and make the coated coating of moisture content in the concrete and be enclosed in inside, the abundant aquation of water supply mud and free of losses, thus play the maintenance effect and need not the maintenance of watering.
Adopt two component high pressure airless spray equipment sprayings during this paint spraying, this spraying coating process requires coating outside the pale of civilization except the energy thick film, also need high viscosity, coating of the present invention is by the adjusting of resin-pigment ratio, make coating reach high viscosity (under 25 ℃ ± 1 ℃ temperature, the viscosity of first component reaches 10000～20000cp, and the viscosity of component B reaches 30000～40000cp), thereby has satisfied service requirements.Adopt two component airless spraying technologies, can improve operating efficiency and coating quality, reduction labour intensity greatly, and save energy.
Through test, solvent-free epoxy coal tar heavy duty anticorrosive coating of the present invention has reached following index:
The solids content of coating of the present invention 〉=95% has reached the GB/T1725 standard that requires in the national technical standard; Viscosity under 25 ℃ ± 1 ℃ temperature, first component are in 10000～20000cp scope, and component B has reached ASTM D2196 standard in 30000～40000cp scope; Its density has reached the GB/T6750 standard in 1.3～1.5g/ml scope; Its working life≤30 minute; The dried coating film time, do solid work≤8 hours surface drying≤2.5 hour, reaches the GB/T1728 standard; Hardness 〉=3H reaches the GB/T6739 standard; Sticking power 〉=1.5Mpa reaches ASTM D4541B standard; Anti-impact force 〉=20Kgcm reaches the ASTMG14 standard; Its wear resistance (750g, 1000r), weightlessness≤0.1g reaches the GB/T1768 standard; Salt spray resistance 4000 hours has reached the GB/T1771 specified standards; In 3% salt solution, soak and soak 30 days, 10% H in 90 days, 10% NaOH alkali lye
2SO
4Soaked in the acid solution 30 days, all reached in the GB/T1763 standard do not ftracture, non-foaming, adeciduate technical requirements; Its dielectric strength 〉=25MV/m, volume specific resistance 〉=4 * 10
12Ω m has all satisfied the technical requirements in the SY/T0447 standard; Chloride permeability coefficient≤5 * 10 of its 30 days (30d)
-3Mg/cm
2D reaches the requirement of JTJ275 standard.In addition, its shelf lives reaches 12 months.
In actual applications, it has satisfied anticorrosion, thick filmization, tachy steroling and has reached under concrete hygrometric state situation every requirements such as application in divert water from the south to the north project Beijing section PCCP pipe antiseptic project practice of construction.
To sum up, coating tough and hard wear resistant behind the paint spraying of the present invention, the sticking power shock resistance is strong, underground water, acid, alkali, salt, carbonic acid gas, chlorion, sulphate reducing bacteria had excellent preservative property, stray current had high insulativity, various chemical mediators are had high stability, can protect bottom substrate long-term effectively; In the practice of construction process, one time application thickness can reach not sagging of 1000um, and can solidify rapidly, and under 25 ℃ of envrionment conditionss, surface drying 1.5h does solid work 6h, and 12h can carry lifting; Can application under the situation of concrete initial set and hygrometric state, do not influence cement aquation and coating adhesion, and concrete is played the maintenance effect, removed the maintenance operation of watering from, by last, the present invention provides fine coating for Steel Concrete antiseptic project and steel construction piece antiseptic project; In conjunction with two component airless spraying technologies, operating efficiency is high and can obtain the high-quality coating.
Claims (2)
1. a solvent-free epoxy coal tar heavy duty anticorrosive coating is characterized in that; It comprises two kinds of components of first, second:
The first component comprises: the reactive thinner of the Resins, epoxy of 20～50 mass units, 10～15 mass units, 0.5 the auxiliary rheological agents of～2 mass units, 0.5 the defoamer of～2 mass units, 0.5 the flow agent of～2 mass units, the wetting dispersing agent of 1～3 mass unit, the mineral-filled material of the aerosil of 0.5～2 mass unit and 36～55 mass units;
Component B comprises: the amine curing agent of 15～20 mass units, the coal tar of 25～30 mass units, 0.5 the defoamer of～2 mass units, 0.3 the flow agent of～2 mass units, 0.5 the wetting dispersing agent of～2 mass units, the mineral-filled material of the aerosil of 0.7～2 mass unit and 45～55 mass units;
Described mineral-filled material is the mineral-filled material of siloxane bond class; Described amine curing agent is the mannich base solidifying agent;
Under 25 ± 1 ℃ of temperature, the first component is in 10000～20000cp scope, and component B is in 30000～40000cp scope; Solvent-free epoxy coal tar heavy duty anticorrosive coating first component, the component B that volume is identical is respectively charged in the corresponding spray chamber of two component high pressure airless spray equipments and sprays.
2. the manufacturing process of solvent-free epoxy coal tar heavy duty anticorrosive coating as claimed in claim 1 is characterized in that;
The manufacturing process of first component
Earlier Resins, epoxy, reactive thinner, wetting dispersing agent, defoamer, flow agent are put into high speed dispersor and stirred, add aerosil and auxiliary rheological agents again and continue to be stirred to and mix; Then, carry out high speed dispersion after adding mineral-filled material, carry out stirring at low speed again, then, check its viscosity; If viscosity is defective, continue stirring at low speed, it is qualified to be verified up to viscosity; If viscosity is qualified, filter the back first component finished product;
The manufacturing process of component B
Earlier coal tar, defoamer, flow agent, wetting dispersing agent are put into high speed dispersor and stirred, add aerosil again and continue to be stirred to and mix; Then, carry out high speed dispersion after putting into mineral-filled material, carry out stirring at low speed after putting into amine curing agent again; Detect the viscosity of mixture then, if viscosity is defective, proceed stirring at low speed, it is qualified to be verified up to viscosity; If viscosity is qualified, filter the back the component B finished product.
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| CN102190506B (en) * | 2010-03-05 | 2013-04-03 | 上海耐齐建材有限公司 | Dual-component surfactant |
| CN102382546A (en) * | 2010-09-06 | 2012-03-21 | 张子鹏 | Special modified solvent-free epoxy paint for glass reinforced plastic |
| CN101985120A (en) * | 2010-11-22 | 2011-03-16 | 国家海洋局天津海水淡化与综合利用研究所 | Spray coating process for anti-corrosive paint special for distilled seawater desalination equipment |
| CN102533058B (en) * | 2010-12-27 | 2014-05-28 | 海洋化工研究院有限公司 | Solvent-free anticorrosive paint for damp interfaces and preparing method and application thereof |
| CN102086337B (en) * | 2010-12-28 | 2014-03-12 | 上海海隆赛能新材料有限公司 | High-performance impact-resistance steel structure paint |
| CN102220069A (en) * | 2011-06-09 | 2011-10-19 | 安徽工业大学 | Aqueous epoxy coal tar paint and preparation method thereof |
| CN102513279A (en) * | 2011-11-24 | 2012-06-27 | 厦门双瑞船舶涂料有限公司 | Method for automatically coating anticorrosive paint on outer wall of heavy-caliber PCCP (Prestressed Concrete Cylinder Pipe) online |
| CN104341966B (en) * | 2013-07-26 | 2016-08-31 | 中航百慕新材料技术工程股份有限公司 | A kind of non-solvent epoxy coal tar pitch anticorrosive paint |
| CN104449216A (en) * | 2014-11-19 | 2015-03-25 | 常熟市万象涂料有限公司 | Anti-corrosive pipeline coating |
| CN105694662B (en) * | 2014-11-27 | 2018-05-11 | 中国石油天然气集团公司 | A kind of solvent-free epoxy coal tar anticorrosive paint and its preparation method and application |
| CN108913032B (en) * | 2018-07-16 | 2020-09-15 | 江苏山力漆业有限公司 | Environment-friendly water-based epoxy coal tar pitch anticorrosive paint and preparation method thereof |
| CN110513560A (en) * | 2019-09-04 | 2019-11-29 | 辽宁爱维尔金属成型科技股份有限公司 | It is a kind of for connecting the nodular cast iron pipe fittings of continuous fiber reinforcement polyethylene compound pipe |
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