CN103555144A - Epoxy polyaniline flame retardant priming paint for subway vehicle and preparation method thereof - Google Patents
Epoxy polyaniline flame retardant priming paint for subway vehicle and preparation method thereof Download PDFInfo
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Abstract
The invention relates to epoxy polyaniline flame retardant priming paint for a subway vehicle and a preparation method thereof. The epoxy polyaniline flame retardant priming paint comprises two parts, namely a priming paint material part and a curing agent part, wherein the priming paint material part comprises epoxy resin, a composite antirust pigment filler, a liquid-solid composite flame retardant material, an auxiliary and a diluter; the curing agent part comprises low molecular weight modified polyamide, cashew oil phenol modified aromatic amine, a catalyst, nano polyaniline and a mixed solvent; during construction, the epoxy polyaniline flame retardant priming paint is formed by blending the priming paint material part and the curing agent part in weight ratio of 100:20; defined amount of diluter can be used for regulating applicable viscosity, so as to be convenient for construction. The epoxy polyaniline flame retardant priming paint for the subway vehicle has the characteristics of high efficiency, corrosion prevention, salt spray resistance property, quick drying, good physical and mechanical properties, strong adhesion, convenience in construction, fire prevention, flame retardance, low smoke, low toxicity and environmental protection performance, so that the anti-corrosion coating requirement of a track traffic vehicle is met.
Description
Technical field
The present invention relates to fire-retardant priming paint of epoxy polyaniline and preparation method thereof for a kind of railcar.
Background technology
At present, railcar priming paint, is mainly with redix, add zinc phosphate, aluminium triphosphate, the inorganic rust-stabilising pigment such as ferric oxide, and the filler such as superfine talcum powder, barium sulfate, add conventional dispersion agent simultaneously, rheological agent, defoamer, anti-sudden strain of a muscle rust agent etc. and thinner form paint vehicle part, take polymeric amide, modified by cardanol amine and solvent is curing agent part, is equipped with appropriate thinner and forms during construction.The raising in requirement aspect Corrosion Protection and fire retardant performance with priming paint along with railcar, the approach solving at present mainly contains three classes: a class is to add the high-efficiency rust-preventive pigments such as zinc-chrome yellow, red lead, in conjunction with ammonium polyphosphate and halogen containing flame-retardant.Zinc-chrome yellow, red lead good antirust property, but containing heavy metal, ammonium polyphosphate based flame retardant smog is larger, and halogen containing flame-retardant smog toxicity is higher; Equations of The Second Kind adds the rust-stabilising pigments such as zinc-chrome yellow, red lead, fire retardant phosphoric acid ester liquid flame retardant, and this series products heavy metal content is high, and flame retardant effect is poor; The 3rd class is added polyaniline compound organic rust preventing material, and polyaniline (PAn) is a kind of high-tech novel material with specific function, and its antiseptic property is excellent, have certain flame retardant effect, but common polyaniline is difficult to be dispersed in coating system.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, provide a kind of and have that high-efficiency anticorrosive, salt spray resistance are excellent, dry rapidly, physical and mechanical properties is good, fire-retardant priming paint of epoxy polyaniline and preparation method thereof for railcar of strong adhesion, constructability, fire protection flame retarding, low-smoke low-toxicity environment-friendly type performance characteristics, to adapt to the corrosion-proof coating requirement of rail traffic vehicles.
For achieving the above object, the technical solution that the present invention adopts is: the preparation method of the fire-retardant priming paint of epoxy polyaniline for a kind of railcar, is characterized in that the described fire-retardant priming paint of this epoxy polyaniline is comprised of primer vehicle and solidifying agent two portions; Be that the fire-retardant priming paint of epoxy polyaniline is to be made by following raw material and step:
(1) each raw material weight proportioning of composition primer vehicle is:
Composite antirust color stuffing 45-55 part, E-20 epoxy resin 15-20 part,
E-44 epoxy resin 5-10 part, tritolyl phosphate 2.0-2.5 part,
Ammonium polyphosphate 1.6-2.0 part, silicone antifoam agent 1.0-1.3 part,
Aerosil 0.7-0.9 part, the anti-sudden strain of a muscle rust of Sulfonates agent 0.7-0.9 part,
Organobentonite 0.2-0.3 part, high molecular block interpolymers dispersion agent 1.8-2.2 part,
Thinner 15-25 part;
Wherein: composite antirust color stuffing is zinc phosphate: nano zine oxide: aluminium triphosphate: ferric oxide series: mica powder: ultra-fine barium sulfate: the compound of micronized talc powder=16:8:16:15:12:18:15 weight ratio; Thinner is dimethylbenzene: propyl carbinol: diacetone alcohol: the mixed solvent of butyl glycol ether=40:35:15:10 weight ratio;
(2) weight proportion of each raw material of composition solidifying agent is:
Lower molecular weight modified polyamide 20-25 part, cashew nut oil phenol modified aromatic amine 20-25 part,
Catalyzer 4-6 part, nano polyaniline liquid 15-25 part,
Mixed solvent 30-35 part;
Wherein: nano polyaniline liquid is nano polyaniline: the mixed solution of N-methyl-2-pyrrolidone=1:1 weight ratio; Mixed solvent is dimethylbenzene: the mixed solvent of butanols=1:1 weight ratio;
Each described step is:
The preparation of A, primer vehicle: by 11 kinds of raw materials of composition primer vehicle by weight ratio, first two kinds of epoxy resin are made an addition in container tank, and this container tank is placed under dispersion machine, open dispersion machine, adjusting rotary speed is 500-800 rev/min, then under whipped state, adds successively thinner, composite antirust color stuffing, fire retardant material, auxiliary agent; After reinforced, adjusting dispersing speed is 1000-1200 rev/min, stirs 10-15 minute, obtains pre-dispersed slurry; Then with air pump, pumped in sand mill, be ground to fineness≤30 μ m discharging; In 80 object screen clothes, filter, remove mechanical impurity, primer vehicle, with metal bucket, pack, stand-by;
The preparation of B, solidifying agent: first prepare nano polyaniline liquid, nano polyaniline liquid is nano polyaniline: the mixed solution of N-methyl-2-pyrrolidone=1:1 weight ratio; Be about to nano polyaniline and be placed in by weight ratio container tank, and this container tank is placed under dispersion machine, open dispersion machine, adjusting rotary speed is 500-600 rev/min, under whipped state, add by weight ratio N-methyl-2-pyrrolidone, after feeding in raw material, adjusting dispersing speed is 1600-2000 rev/min, stir 25-30 minute, obtain nano polyaniline liquid; Then by form in solidifying agent raw material lower molecular weight modified polyamide, cashew nut oil phenol modified aromatic amine, catalyzer and four kinds of raw materials of mixed solvent make an addition in the nano polyaniline liquid in this container tank, adjusting dispersing speed is 1000-1200 rev/min, stir 10-15 minute, screen filtration, solidifying agent, with metal bucket, pack, stand-by;
The preparation of the fire-retardant priming paint of epoxy polyaniline for C, railcar: be in use, primer vehicle is mixed by the weight proportion of 100:20 with solidifying agent, during construction, can regulate working viscosity with appropriate thinner, the fire-retardant priming paint of epoxy polyaniline for railcar.
The fire-retardant priming paint of epoxy polyaniline for a kind of railcar of preparing by described method.
the mechanism of action of the fire-retardant priming paint of epoxy polyaniline for this railcar:
(1) epoxy resin and solidifying agent reaction mechanism: the epoxy ring-opening of the primary amine that contains reactive hydrogen atom and secondary amine and epoxy resin generates hydroxyl, and hydroxyl plays etherification reaction with epoxy group(ing) again, finally generates netted or three-dimensional polymer; Tertiary amine plays katalysis.
(2) nano polyaniline protection against corrosion mechanism: polyaniline can be oxidized O by oxygen
2+ 2H
2o+PAn
o=PAn
++ 4OH
-
Thereby play shielding effect, simultaneously polyaniline can form fine and close oxide film and passivation also possesses the functions such as anodic protection, inhibition in metallic surface, and form electric field and hinder electronics transmission etc., make it have remarkable Corrosion Protection.
(3) composite antirust color stuffing anticorrosion mechanism: composite antirust color stuffing has physics or chemical antirust function concurrently.
(4) fire retardant material fire retardant mechanism: fire retardant material is that phosphoric acid ammonium class solid flame retardant and phosphate ester-containing class I liquid I fire retardant organically combine, and has Synergy with nano polyaniline containing nitrogen compound simultaneously, and its flame retardant effect is strengthened.
Technical essential of the present invention is: the characteristic according to this railcar with the fire-retardant priming paint of epoxy polyaniline, its resin is by E-20 bisphenol A type epoxy resin and two kinds of resin compounded of E-44 bisphenol A type epoxy resin.The epoxy resin that contains high and low molecular weight generates netted or three-dimensional polymer with the modified amine resin ring-opening reaction with reactive hydrogen, make to there is good physical and chemical performance after made priming paint products solidifying, it all has excellent bonding strength to the surface of metal and non-metallic material, dielectric properties are good, hardness is high, snappiness is better, can adapt to the particular requirement of railcar application.
The composite antirust color stuffing of the fire-retardant priming paint of this epoxy polyaniline is comprised of zinc phosphate, aluminium triphosphate, mica powder, nano zine oxide, ultra-fine barium sulfate, micronized talc powder, ferric oxide series etc.The conventional rust-stabilising pigments such as zinc phosphate, aluminium triphosphate, ferric oxide have physics and chemical antirust function concurrently; Nano zine oxide, ultra-fine barium sulfate, micronized talc powder combination, can effectively slow down settling velocity, makes the priming paint upper and lower uniformity of filming in construction drying process, and ultra-fine color stuffing is also of value to the raising of Corrosion Protection; The mica powder that adds sheet can slow down H
2o and O
2infiltration, delay the corrosion of paint film.
Thereby the nano polyaniline in the fire-retardant priming paint of this epoxy polyaniline can be oxidized and play shielding effect by oxygen; polyaniline can form fine and close oxide film and passivation in metallic surface simultaneously; also possess the functions such as anodic protection, inhibition; and form electric field obstruction electronics transmission etc., make it have remarkable Corrosion Protection.
Fire retardant material employing phosphoric acid ester liquid flame retardant and the ammonium phosphate solid flame retardant of the fire-retardant priming paint of this epoxy polyaniline are composite.At present both at home and abroad the research and development of anti-flaming dope, are flame-retardant system mainly with P-C-N, and we have selected phosphoric acid ester, ammonium polyphosphate composite on this basis, simultaneously and polyaniline form cooperative flame retardant effect, effect has larger enhancing.Changed and used traditional ammonium class, halogen fire retardant, though because of its good flame retardation effect, the amount of being fuming greatly, easily produce the defect of the toxic and harmfuls such as hydrogen halide, make product of the present invention there is the environmental-protecting performances such as better fire protection flame retarding, low-smoke low-toxicity.
The fire-retardant priming paint of this epoxy polyaniline adopts the auxiliary agents such as rheological agent, dispersion agent, defoamer, the agent of anti-sudden strain of a muscle rust.Auxiliary rheological agents is selected organobentonite and gas phase SiO
2, because the gas phase SiO adding
2, in coating system, very easily forming three-dimensional reticulated structure, organobentonite forms reticulated structure by interconnecting, and so not only can effectively slow down the sedimentation of pigment, and provides good levelling property and anti-sag performance for coating; Dispersion agent is selected high molecular block interpolymers, and it is all better to the dispersion effect of coating system and package stability; Defoamer is silicone based defoamer, and it has powerful froth breaking effect; The agent of anti-sudden strain of a muscle rust is not contain the Sulfonates of nitrite.
The fire-retardant priming paint thinner of this epoxy polyaniline is selected the mixed solvent of dimethylbenzene, propyl carbinol, diacetone alcohol, butyl glycol ether, and its polarity is stronger, and dissolving power is stronger.
Lower molecular weight modified polyamide, cashew nut oil phenol modified aromatic amine, catalyzer, nano polyaniline, dimethylbenzene, propyl carbinol, N-Methyl pyrrolidone are selected in the fire-retardant solidifying priming paint agent of this epoxy polyaniline, nano polyaniline has excellent anti-corrosion capability, and N-Methyl pyrrolidone p-poly-phenyl amine has good solvency power.
the key technical indexes of the present invention is as follows:
The fire-retardant priming paint of this epoxy polyaniline is through Ministry of Railways's product quality supervision and inspection Spot detection, fire retardant performance, the test of smog toxicity test SongSGS company, think that its various aspects of performance meets subway, high-performance epoxy primer requirement for city rail traffic vehicle, its result is as follows:
(1), according to TB/T2260-2001 standard, the fire-retardant priming paint detected result of this epoxy polyaniline is as follows:
(2), combustion test examining report: (pressing EDIN 5510-2:2003)
A: burning grade S4
b:smog grade SR2
c: ST2 is without drippage for drippage grade
(3), smog toxicity test examining report is as follows:
Above data are qualified according to BS6853:1999 standard detection, have good flame retardant resistance, low-smoke low-toxicity.
In sum, the present invention is comprised of primer vehicle and solidifying agent two portions; By epoxy resin, composite antirust color stuffing, liquid-solid composite fire retardant material, auxiliary agent, thinner, be paint vehicle part; By lower molecular weight modified polyamide, cashew nut oil phenol modified aromatic amine, catalyzer, nano polyaniline, mixed solvent, it is curing agent part; During construction by paint vehicle: the weight ratio that solidifying agent is 100:20 coordinates and forms; For ease of construction, available appropriate thinner regulates working viscosity; The invention has the beneficial effects as follows: one, select the epoxy resin of high and low molecular weight and lower molecular weight modified polyamide, cashew nut oil phenol modified aromatic amine to carry out crosslinking reaction, make that its physical and mechanical properties is good, strong adhesion, to construction environment, require low.Two, select the inorganic rust-stabilising pigments such as nano polyaniline organic anti-corrosive pigment and zinc phosphate, aluminium triphosphate, ferric oxide series to be used in conjunction with, there is antiseptic property excellent, more than salt spray resistance can reach 1000h.Three, fire protection flame retarding, low-smoke low-toxicity: the present invention selects liquid-solid composite fire retardant material and nano polyaniline to form cooperative flame retardant effect, and fire protection flame retarding effect has larger enhancing, and not halogen-containing element has low-smoke low-toxicity environmental protection characteristic simultaneously.Four, construction application performance is good: select organobentonite and gas phase SiO
2be used in conjunction with, for coating provides good levelling property and anti-sag performance, make its storage and workability good.Five, railcar is on probation through South China car electric locomotive Co., Ltd., Factory with the fire-retardant priming paint of epoxy polyaniline, and performance and construction aspect all meet its requirement, and trial effect is good.This railcar with the fire-retardant priming paint of epoxy polyaniline have that high-efficiency anticorrosive, salt spray resistance are excellent, dry rapidly, physical and mechanical properties is good, strong adhesion, constructability, fire protection flame retarding, low-smoke low-toxicity environment-friendly type performance characteristics, to adapt to the corrosion-proof coating requirement of rail traffic vehicles.
Embodiment
Fire-retardant priming paint of epoxy polyaniline and preparation method thereof for a kind of railcar, is characterized in that the described fire-retardant priming paint of this epoxy polyaniline is comprised of primer vehicle and solidifying agent two portions; Be that the fire-retardant priming paint of epoxy polyaniline is to be made by following raw material and step:
(1) each raw material weight proportioning of composition primer vehicle is:
Composite antirust color stuffing 45-55 part, E-20 epoxy resin 15-20 part,
E-44 epoxy resin 5-10 part, tritolyl phosphate 2.0-2.5 part,
Ammonium polyphosphate 1.6-2.0 part, silicone antifoam agent 1.0-1.3 part,
Aerosil 0.7-0.9 part, the anti-sudden strain of a muscle rust of Sulfonates agent 0.7-0.9 part,
Organobentonite 0.2-0.3 part, high molecular block interpolymers dispersion agent 1.8-2.2 part,
Thinner 15-25 part;
Wherein: composite antirust color stuffing is zinc phosphate: nano zine oxide: aluminium triphosphate: ferric oxide series: mica powder: ultra-fine barium sulfate: the compound of micronized talc powder=16:8:16:15:12:18:15 weight ratio; Thinner is dimethylbenzene: propyl carbinol: diacetone alcohol: the mixed solvent of butyl glycol ether=40:35:15:10 weight ratio;
Zinc phosphate in above-mentioned composite antirust color stuffing is that the south of the River, Guangxi fine chemistry industry Materials Co., Ltd produces, nano zine oxide is that Zhuzhou Zhong Le chemical materials company limited produces, aluminium triphosphate is that Xin Jing Science and Technology Ltd. of Guangxi Inst. of Chemical Engineering produces, ferric oxide series pigment is that South 3rd Ring Road, lake pigment company produces, mica powder is that Chuzhou, Anhui Province Ge Rui mining industry company limited produces, ultra-fine barium sulfate is that Guizhou millimicro powder body material company limited produces, and micronized talc powder is that Guangxi Long Guang talcum development corporation, Ltd. produces; E-20 epoxy resin, E-44 epoxy resin are respectively South Asia, Taiwan resin processing plant and produce 901 * 75 epoxy resin, 128 epoxy resin; Tritolyl phosphate is that Hebei development chemical rubber company limited produces; Ammonium polyphosphate fire retardant material is that Hangzhou Jie Ersi company produces; High molecular block interpolymers dispersion agent, silicone antifoam agent are that German BYK company produces Sulfonates, the agent of anti-sudden strain of a muscle rust is that middle mountain gold is rolled into a ball chemical company limited product, in thinner, dimethylbenzene, propyl carbinol, diacetone alcohol, butyl glycol ether are Jiangsu three lignify works and produce; Aerosil and organobentonite are that Taiwan De Qian company produces.
(2) weight proportion of each raw material of composition solidifying agent is:
Lower molecular weight modified polyamide 20-25 part, cashew nut oil phenol modified aromatic amine 20-25 part,
Catalyzer 4-6 part, nano polyaniline liquid 15-25 part,
Mixed solvent 30-35 part;
Wherein: nano polyaniline liquid is nano polyaniline: the mixed solution of N-methyl-2-pyrrolidone=1:1 weight ratio; Mixed solvent is dimethylbenzene: the mixed solvent of butanols=1:1 weight ratio;
Above-mentioned lower molecular weight modified polyamide is that outstanding chemical industry product is encircled in Guangzhou, cashew nut oil phenol modified aromatic An Wei U.S. Ka Delai company produces, catalyzer is the 4-6(dimethylamino methyl that U.S.'s gas chemical industry produces) trisphenol, nano polyaniline is that Chongqing Jin Gute chemical company produces, and N-Methyl pyrrolidone is that Dongguan Hui Xin Chemical Co., Ltd. produces;
Each described step is:
The preparation of A, primer vehicle: by 11 kinds of raw materials of composition primer vehicle by weight ratio, first two kinds of epoxy resin are made an addition in container tank, and this container tank is placed under dispersion machine, open dispersion machine, adjusting rotary speed is 500-800 rev/min, then under whipped state, adds successively thinner, composite antirust color stuffing, fire retardant material, auxiliary agent; After reinforced, adjusting dispersing speed is 1000-1200 rev/min, stirs 10-15 minute, obtains pre-dispersed slurry; Then with air pump, pumped in sand mill, be ground to fineness≤30 μ m discharging; In 80 object screen clothes, filter, remove mechanical impurity, primer vehicle, with metal bucket, pack, stand-by;
The preparation of B, solidifying agent: first prepare nano polyaniline liquid, nano polyaniline liquid is nano polyaniline: the mixed solution of N-methyl-2-pyrrolidone=1:1 weight ratio; Be about to nano polyaniline and be placed in by weight ratio container tank, and this container tank is placed under dispersion machine, open dispersion machine, adjusting rotary speed is 500-600 rev/min, under whipped state, add by weight ratio N-methyl-2-pyrrolidone, after feeding in raw material, adjusting dispersing speed is 1600-2000 rev/min, stir 25-30 minute, obtain nano polyaniline liquid; Then lower molecular weight modified polyamide, cashew nut oil phenol modified aromatic amine, catalyzer and four kinds of raw materials of mixed solvent of forming in solidifying agent raw material are made an addition in the nano polyaniline liquid in this container tank, adjusting dispersing speed is 1000-1200 rev/min, stir 10-15 minute, screen filtration, solidifying agent, with metal bucket, pack, stand-by;
The preparation of the fire-retardant priming paint of epoxy polyaniline for C, railcar: be in use, primer vehicle mixed by the weight proportion of 100:20 with solidifying agent, the fire-retardant priming paint of epoxy polyaniline for railcar; During construction, can regulate working viscosity with appropriate thinner.The fire-retardant priming paint of epoxy polyaniline for a kind of railcar of preparing by described method.
Below provide three specific exampless of the present invention.
Primer vehicle is mixed by the weight proportion of 100:20 with solidifying agent; Above three example detection results all reach technical requirements.
Claims (2)
1. a preparation method for the fire-retardant priming paint of epoxy polyaniline for railcar, is characterized in that the described fire-retardant priming paint of this epoxy polyaniline is comprised of primer vehicle and solidifying agent two portions; Be that the fire-retardant priming paint of epoxy polyaniline is to be made by following raw material and step:
(1) each raw material weight proportioning of composition primer vehicle is:
Composite antirust color stuffing 45-55 part, E-20 epoxy resin 15-20 part,
E-44 epoxy resin 5-10 part, tritolyl phosphate 2.0-2.5 part,
Ammonium polyphosphate 1.6-2.0 part, silicone antifoam agent 1.0-1.3 part,
Aerosil 0.7-0.9 part, the anti-sudden strain of a muscle rust of Sulfonates agent 0.7-0.9 part,
Organobentonite 0.2-0.3 part, high molecular block interpolymers dispersion agent 1.8-2.2 part,
Thinner 15-25 part;
Wherein: composite antirust color stuffing is zinc phosphate: nano zine oxide: aluminium triphosphate: ferric oxide series: mica powder: ultra-fine barium sulfate: the compound of micronized talc powder=16:8:16:15:12:18:15 weight ratio; Thinner is dimethylbenzene: propyl carbinol: diacetone alcohol: the mixed solvent of butyl glycol ether=40:35:15:10 weight ratio;
(2) weight proportion of each raw material of composition solidifying agent is:
Lower molecular weight modified polyamide 20-25 part, cashew nut oil phenol modified aromatic amine 20-25 part,
Catalyzer 4-6 part, nano polyaniline liquid 15-25 part,
Mixed solvent 30-35 part;
Wherein: nano polyaniline liquid is nano polyaniline: the mixed solution of N-methyl-2-pyrrolidone=1:1 weight ratio; Mixed solvent is dimethylbenzene: the mixed solvent of butanols=1:1 weight ratio;
Each described step is:
The preparation of A, primer vehicle: by 11 kinds of raw materials of composition primer vehicle by weight ratio, first two kinds of epoxy resin are made an addition in container tank, and this container tank is placed under dispersion machine, open dispersion machine, adjusting rotary speed is 500-800 rev/min, then under whipped state, adds successively thinner, composite antirust color stuffing, fire retardant material, auxiliary agent; After reinforced, adjusting dispersing speed is 1000-1200 rev/min, stirs 10-15 minute, obtains pre-dispersed slurry; Then with air pump, pumped in sand mill, be ground to fineness≤30 μ m discharging; In 80 object screen clothes, filter, remove mechanical impurity, primer vehicle, with metal bucket, pack, stand-by;
The preparation of B, solidifying agent: first prepare nano polyaniline liquid, nano polyaniline liquid is nano polyaniline: the mixed solution of N-methyl-2-pyrrolidone=1:1 weight ratio; Be about to nano polyaniline and be placed in by weight ratio container tank, and this container tank is placed under dispersion machine, open dispersion machine, adjusting rotary speed is 500-600 rev/min, under whipped state, add by weight ratio N-methyl-2-pyrrolidone, after feeding in raw material, adjusting dispersing speed is 1600-2000 rev/min, stir 25-30 minute, obtain nano polyaniline liquid; Then by form in solidifying agent raw material lower molecular weight modified polyamide, cashew nut oil phenol modified aromatic amine, catalyzer and four kinds of raw materials of mixed solvent make an addition in the nano polyaniline liquid in this container tank, adjusting dispersing speed is 1000-1200 rev/min, stir 10-15 minute, screen filtration, solidifying agent, with metal bucket, pack, stand-by;
The preparation of the fire-retardant priming paint of epoxy polyaniline for C, railcar: be in use, primer vehicle mixed by the weight proportion of 100:20 with solidifying agent, the fire-retardant priming paint of epoxy polyaniline for railcar.
2. the fire-retardant priming paint of epoxy polyaniline for a kind of railcar that prepared by the method for claim 1.
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CN104371541A (en) * | 2014-11-17 | 2015-02-25 | 株洲市九华新材料涂装实业有限公司 | High-temperature primer for metro wheels and preparation method of high-temperature primer |
CN114381185A (en) * | 2022-01-17 | 2022-04-22 | 湛江港石化码头有限责任公司 | High-strength anti-oil-leakage tank bottom and pipeline non-fire repairing material and method |
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