CN103555143A - Anti-pollution abrasion-resistant coating for container capable of being conventionally sprayed - Google Patents
Anti-pollution abrasion-resistant coating for container capable of being conventionally sprayed Download PDFInfo
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- CN103555143A CN103555143A CN201310530756.2A CN201310530756A CN103555143A CN 103555143 A CN103555143 A CN 103555143A CN 201310530756 A CN201310530756 A CN 201310530756A CN 103555143 A CN103555143 A CN 103555143A
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Abstract
The invention provides an anti-pollution abrasion-resistant coating for a container capable of being conventionally sprayed. The anti-pollution abrasion-resistant coating is prepared by taking a certain proportion of modified epoxy resin and modified alicyclic amine curing agents as main film forming matters and adding an abrasion-resistant functional filler, a pigment, an auxiliary agent and a surface regulating agent. According to the invention, the rigidity of a paint film is enhanced through the modified epoxy resin and the modified alicyclic amine curing agents; the added abrasion-resistant functional filler has a rigid molecule structure similar to that of a diamond, so that the abrasion resistance of the paint film can be effectively enhanced; the surface regulating agent has the characteristic of enabling the surface of the paint film to be fast hydrophilic, and pollutants positioned on the surface of the paint film are easily drifted on the water, so that the effects of easiness for cleaning and pollution prevention are achieved. The invention also provides a preparation method of the anti-pollution abrasion-resistant coating. The anti-pollution abrasion-resistant coating prepared through the method provided by the invention has the advantages of good properties of toughness, abrasion resistance, easiness for cleaning, pollution prevention, and the like.
Description
Technical field
The present invention relates to the anti-pollution wear-resistant paint of a kind of freight container, especially relate to a kind of anti-pollution wear-resistant paint of freight container that can conventional spraying application.
Background technology
The Nowadays, Container shipping industry interior finish paint of epoxy used only has general corrosionproof protection function, and wear resisting property is general, does not possess easy cleaning, antipollution effect.In case of larger paint film damage and pollution appear in the hard material such as ore in bulk, coal, thereby affect the continuation use of freight container.In container industry, mainly adopt at present the form of cleaning polishing and the overhaul of giving an encore in advance.Clean polishing the average film thickness of filming is reduced greatly, directly affect anticorrosion ability; The overhaul of giving an encore investment is larger, and cost is high.That form no matter, all can shorten work-ing life of freight container, causes the waste of manpower, the energy and article.
Cause freight container short basic reason in work-ing life to be that in common epoxy, finish paint fails to add wear-resisting functions medium and water-wetted surface conditioning agent, make paint film damage when suffering touch hard object friction, shock large, film thickness declines; And the poor paint film that causes of contamination resistance meets with clean wasting time and energy while polluting, when serious, must use sand papering, thereby further aggravate the decline of film thickness.Film thickness declines directly affects the antiseptic property of paint film, causes metallic corrosion and affects work-ing life of freight container.The clean difficulty of Nowadays, Container shipping industry ubiquity and the high problem of working service cost.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of both hard wear resistant, easy to clean anti-pollution again, and can realize the anti-pollution wear-resistant paint of freight container of conventional spraying equipment construction.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of anti-pollution wear-resistant paint of freight container that can conventional spraying, this coating comprises host and solidifying agent, and described host is for to be comprised of epoxy resin, wear-resisting functions filler, pigment, auxiliary agent, surface conditioner; Described solidifying agent is modification ring grease amine hardener;
In anti-pollution wear-resistant paint of the present invention, epoxy resin and aliphatic cyclic amine solidifying agent are the material of main parts of this coating, and the integrated performance indexs such as hardness of coating are played to conclusive effect.
In general, epoxy resin contains two or more epoxide groups, and epoxide group, by a Sauerstoffatom and two rings that carbon atom forms, has height activity, can react with polytype solidifying agent, forms the superpolymer of tridimensional network.Therefore, epoxy resin-based paint has the following advantages:
1, paint film, to grounds such as metal, pottery, glass, concrete, timber, all has good sticking power.Because epoxy resin contains many hydroxyls and ehter bond, can attract each other with ground; Because of epoxy resin and solidifying agent ring-opening polymerization, volume change is very little, so become reconciled with most of polarity substrate adhesions again.2, paint film chemical resistance performance is good, because only having hydroxyl and ehter bond in resin, there is no ester bond, and alkali resistance is particularly outstanding.Sticking power is good, alkali resistance is excellent, can be in a large number for the inner wall anti-corrosive coating of groove, tank, case.3, paint film is tough and tensile.Epoxy resin is because of hard containing aromatic ring; Ether-containing key is convenient to molecule rotation and is had toughness.Therefore, the more general coating tough and hard wear resistant of epoxy resin-based paint.
Modification aliphatic cyclic amine solidifying agent have chemical-resistant, rigidity and the performances such as toughness all suitable and above-mentioned epoxy resin coordinate.
Host of the present invention and solidifying agent are comprised of the component of following mass percent:
Preferably, the mass ratio of host and solidifying agent is 9:1.
In above-mentioned formula, epoxy resin is epoxy resin one by mass ratio: epoxy resin two=0.5-2:1 forms; Preferably, epoxy resin one: epoxy resin two=3:4.
Wherein, epoxy resin one is a kind of low-viscosity, solvent-free epoxy resin, and oxirane value is 0.48～0.54eq/100g, solids content >=98%, and viscosity is 800-1400mPa.s at 25 ℃, average functionality is 2.0;
The solid epoxy that epoxy resin two is a kind of middle molecular weight, is dissolved in organic solvent, and oxirane value is 0.18～0.22eq/100g, solids content 75%, and average functionality is 2.0;
Modification ring grease amine hardener reactive hydrogen equivalent within the scope of 120-180, non-volatile content >=98%, viscosity is 2000-3000mPa.s at 25 ℃.
In addition, the wear-resisting functions filler in this formula is comprised of separately high hardness wear-resisting filler, or is mixed by high hardness wear-resisting filler and sheet inert filler.Wear-resisting functions filler has similar adamantine stiff molecule structure, except strengthening freight container by the physical strength of anti-pollution wear-resistant paint and reducing costs, can also disperse the internal stress that produces in solidify reaction process, improves the adhesion property with ground.
Through lot of experiments, find, when in parts by weight, preferably, while adding the sheet inert filler that the high hardness wear-resisting filler of 6-12 part and the radius-thickness ratio of 4-10 part are 80-120, can further promote the guardian technique indexs such as the physical and mechanical properties of anti-pollution wear-resistant paint and Corrosion Protection for freight container.High rigidity filler give freight container with anti-pollution wear-resistant paint with good wear hardness, the sheet structure filler of high radius-thickness ratio can form fine and close labyrinth type impermeable layer, greatly extend approach and the time of corrosive medium infiltration, effectively improved the Corrosion Protection of anti-pollution wear-resistant paint for freight container.
Described high hardness wear-resisting filler refers to the mineral filler that Mohs' hardness is greater than 8, can be aluminum oxide; Described sheet inert filler is a kind of or both mixtures in mica powder or talcum powder.
Surface conditioner of the present invention comprises condition of surface control agent and water-wetted surface conditioning agent two portions, condition of surface control agent is polyether modified siloxane, there is good consistency with epoxy resin, can reduce the surface tension of system, promote ground wettability, prevent shrinkage cavity, promote surperficial levelling.Water-wetted surface conditioning agent is one or both the mixture in fluorinated polysiloxane compound.Through the fluorinated polysiloxane of modification, in fluorinated polysiloxane, fluorine atom has very low surface can, Si-O has obvious polarity, through the fluorinated polysiloxane of modification, combines the advantage of organosilicon and organofluorine compound, as finish materials, there is very unique performance.Water-wetted surface conditioning agent, as surface hydrophilic agent, can float rapidly, is gathered in surface formation hydrophilization and films, thereby significantly reduce with the contact angle of water, has hydrophilic effect, makes paint film have lasting easy to clean and preventing polluting effect.
Preferably, water-wetted surface conditioning agent is one or both mixtures in fluorine modified polyorganosiloxane.
Preferably, the quality proportioning of condition of surface control agent and water-wetted surface conditioning agent is: 0.3:1-0.4:1.
Auxiliary agent described in the present invention is one or more in dispersion agent, coupling agent; Described pigment well known to a person skilled in the art pigment, preferably a kind of or both mixtures in Rutile type Titanium Dioxide, carbon black; Described epoxide diluent well known to a person skilled in the art thinner, preferably dimethylbenzene, propyl carbinol mixture.
The present invention also provides a kind of method of preparing above-mentioned anti-pollution wear-resistant paint, comprises the steps:
(1) epoxy resin, auxiliary agent, surface conditioner, epoxide diluent are added in proportion, mix and process 10-20min;
(2) wear-resisting functions filler, pigment are added in said mixture, under the effect of high speed centrifugation dispersion machine, be dispersed to fineness and reach below 45 microns;
(3) after being mixed in proportion, host and solidifying agent obtain described anti-pollution wear-resistant paint.
Advantage and positively effect that the present invention has are:
1, contriver, by great many of experiments, has introduced suitable hydrophilic surface conditioning agent, and has determined suitable proportioning on the basis of condition of surface control auxiliary agent, and the surface conditioner that both form has the coating surface of making antipollution effect easy to clean;
2, in anti-pollution wear-resistant paint of the present invention, epoxy resin one, epoxy resin two, modification aliphatic cyclic amine solidifying agent, filler, pigment, auxiliary agent and surface conditioner ratio are scientific and reasonable, the anti-pollution wear-resistant paint preparing by the present invention is under room temperature (25 ℃), the mixed gel time surpasses 8.0h, under room temperature time of drying (25 ℃), be less than 24h, and can low temperature flash baking.Can carry out spraying application at the coating equipment of conventional container production line, reduce facility investment.This coating is guaranteeing, on the basis of good antiseptic property, to have extraordinary wear resistance and outstanding easy to clean, preventing polluting effect.Extend the work-ing life of freight container, expanded again the use range of freight container.Thereby reach, economize on resources, fall low consumed object, there is good social benefit.
3, filming that the anti-pollution wear-resistant paint that the present invention prepares forms has following superperformance: tough and hard wear resistant, and easy cleaning, anti-pollution, outstanding chemical mediator-resitant property and antiseptic property.
Embodiment
In following embodiment 1-4, the information of related raw material is as follows:
Epoxy resin one: choose the EP-128 epoxy resin of Zi Yangnongjin lake company, oxirane value is 0.54, solids content 99%, viscosity is 10200mPa.s at 25 ℃, average functionality is 2.0;
Epoxy resin two: choose the EP901-X-75 epoxy resin from state's Longhua work, oxirane value is 0.20, solids content 75%, viscosity is 9200mPa.s at 25 ℃, average functionality is 2.0;
Modification aliphatic cyclic amine solidifying agent: choose 2636 solidifying agent from aerochemistry company, the ripple hydrogen equivalent of living is, non-volatile content >=98%, viscosity is 275mPa.s at 25 ℃.
Dispersion agent: choose the BYK-110 from German Bi Ke chemistry (BYK);
Silane coupling agent: choose the silane coupling agent from the SH-6040 of Dow Corning Corporation;
Condition of surface control agent is polyether modified siloxane, and water-wetted surface conditioning agent is fluorine modified polyorganosiloxane epoxide diluent: for dimethylbenzene and propyl carbinol mixture, choose from Jinzhou Petrochemical Company main office.
Solidifying agent: 2636 solidifying agent of choosing Zi Dekun company.
The modified micaceous powder of sheet: radius-thickness ratio is 80-120.
Following table has been listed the related injected volume of embodiment 1-4.
| Material name | Example 1(kg) | Example 2(kg) | Example 3(kg) | Example 4(kg) |
| Epoxy resin one | 10.00 | 15.00 | 25.00 | 24.00 |
| Epoxy resin two | 20.00 | 20.00 | 15.00 | 12.00 |
| The modified micaceous powder of sheet | 12.00 | 9.00 | 6.00 | 12.00 |
| Aluminum oxide | 6.00 | 8.00 | 10.00 | 4.00 |
| Titanium dioxide | 15.00 | 18.00 | 15.00 | 20.00 |
| Carbon black | 0.05 | 0.05 | 0.05 | 0.05 |
| Dispersion agent | 0.30 | 0.50 | 0.30 | 0.50 |
| Silane coupling agent | 0.50 | 0.30 | 0.50 | 0.30 |
| Condition of surface control agent | 0.60 | 0.80 | 0.60 | 0.80 |
| Water-wetted surface conditioning agent | 2.00 | 2.00 | 1.50 | 2.20 |
| Epoxide diluent | 20.00 | 15.00 | 12.00 | 10.00 |
| Solidifying agent | 8.00 | 10.00 | 12.00 | 15.00 |
| Equivalence ratio | 0.75 | 0.75 | 0.75 | 0.75 |
| Mixing viscosity (20 ℃, T-4cup) | 84 | 89 | 93 | 99 |
| Working life (20 ℃, h) | 12 | 10 | 10 | 10 |
| Time of drying (20 ℃, min) | 20 | 18 | 18 | 16 |
Embodiment 1:
By the commercially available Jin Hu EP-128 of company epoxy resin 10kg, commercially available state Longhua work EP901-X-75 epoxy resin 20kg, BYK-110 dispersion agent 0.3kg, the SH-6040 of Dow Corning Corporation silane coupling agent 0.5kg, condition of surface control agent 0.6kg, water-wetted surface conditioning agent 2kg, epoxide diluent 20kg, premix 10min is to mixing, add aluminum oxide 6kg, the modified micaceous powder 12kg of sheet, titanium dioxide 15kg, carbon black 0.05kg, and under the effect of high speed centrifugation dispersion machine, disperse 45min to fineness, below 45 microns, to obtain wear-resisting non-staining coating host.After host is mixed with 2636 solidifying agent 8kg of commercially available De Kun company anti-pollution wear-resistant paint finished product.The mixed viscosity of this system is 84s(20 ℃, T-4cup), the mixed serviceable time is 12h, drying at room temperature time 20h, can be in pump pressure than for 65:1, intake pressure is 0.3-0.6MPa, nozzle is to realize spraying application on the conventional spraying equipment of 0.23 inch, one time coating thickness reaches 80 microns, films in good shape.
Embodiment 2
By the commercially available Jin Hu EP-128 of company epoxy resin 15kg, commercially available state Longhua work EP901-X-75 epoxy resin 20kg, BYK-110 dispersion agent 0.5kg, the SH-6040 of Dow Corning Corporation silane coupling agent 0.3kg, condition of surface control agent 0.8kg, water-wetted surface conditioning agent 2kg, epoxide diluent 15kg, premix 10min is to mixing, add aluminum oxide 8kg, the modified micaceous powder 9kg of sheet, titanium dioxide 18kg, carbon black 0.05kg, and under the effect of high speed centrifugation dispersion machine, disperse 45min to fineness, below 45 microns, to obtain wear-resisting non-staining coating host.After host is mixed with 2636 solidifying agent 10kg of commercially available De Kun company anti-pollution wear-resistant paint finished product.The mixed viscosity of this system is 89s(20 ℃, T-4cup), the mixed serviceable time is 10h, drying at room temperature time 18h, can be in pump pressure than for 65:1, intake pressure is 0.3-0.6MPa, nozzle is to realize spraying application on the conventional spraying equipment of 0.23 inch, one time coating thickness reaches 80 microns, films in good shape.
Embodiment 3
By the commercially available Jin Hu EP-128 of company epoxy resin 25kg, commercially available state Longhua work EP901-X-75 epoxy resin 15kg, BYK-110 dispersion agent 0.3kg, the SH-6040 of Dow Corning Corporation silane coupling agent 0.5kg, condition of surface control agent 0.6kg, water-wetted surface conditioning agent 1.5kg, epoxide diluent 12kg, premix 10min is to mixing, add aluminum oxide 10kg, the modified micaceous powder 6kg of sheet, titanium dioxide 15kg, carbon black 0.05kg, and under the effect of high speed centrifugation dispersion machine, disperse 45min to fineness, below 45 microns, to obtain wear-resisting non-staining coating host.After host is mixed with 2636 solidifying agent 12kg of commercially available De Kun company anti-pollution wear-resistant paint finished product.The mixed viscosity of this system is 93s(20 ℃, T-4cup), the mixed serviceable time is 10h, drying at room temperature time 18h, can be in pump pressure than for 65:1, intake pressure is 0.3-0.6MPa, nozzle is to realize spraying application on the conventional spraying equipment of 0.23 inch, one time coating thickness reaches 80 microns, films in good shape.
Embodiment 4
By the commercially available Jin Hu EP-128 of company epoxy resin 24kg, commercially available state Longhua work EP901-X-75 epoxy resin 12kg, BYK-110 dispersion agent 0.5kg, the SH-6040 of Dow Corning Corporation silane coupling agent 0.3kg, condition of surface control agent 0.8kg, water-wetted surface conditioning agent 2.2kg, epoxide diluent 10kg, premix 10min is to mixing, add aluminum oxide 4kg, the modified micaceous powder 12kg of sheet, titanium dioxide 20kg, carbon black 0.05kg, and under the effect of high speed centrifugation dispersion machine, disperse 45min to fineness, below 45 microns, to obtain wear-resisting non-staining coating host.After host is mixed with 2636 solidifying agent 15kg of commercially available De Kun company anti-pollution wear-resistant paint finished product.The mixed viscosity of this system is 99s(20 ℃, T-4cup), the mixed serviceable time is 10h, drying at room temperature time 16h, can be in pump pressure than for 65:1, intake pressure is 0.3-0.6MPa, nozzle is to realize spraying application on the conventional spraying equipment of 0.23 inch, one time coating thickness reaches 80 microns, films in good shape.
What the anti-pollution wear-resistant paint of the embodiment of the present invention 2 preparations was formed films, and detects, and obtains following detected result:
| Test item | Test method standard | Assay |
| Outward appearance | GB/T9761-2008 | Smooth smooth |
| 60 ° of gloss/% | GB/T9754-2007 | 26 |
| Pliability test | ISO1519:2002 | 2mm flawless |
| Hardness | ISO2815:2003 | 0.8mm |
| Wear resistance (1000g/500r, CS-10) | ISO7784-2:1997 | 0.018g |
| Sticking power (steel plate) | ISO4624:2002 | 7.2MPa |
| Salt-fog test (720h) postadhesion power | ISO9227:2006ISO4624:2002 | 6.7MPa |
| Continuous agglutination,cold test (480h) postadhesion power | ISO6270-1:1998ISO4624:2002 | 6.4MPa |
| Sea water resistance (30g/L NaCl, 96h) | ISO2812-1:2007 | Without abnormal |
| Resistance to fuel oil (90# gasoline, 4h) | ISO2812-1:2007 | Without abnormal |
| Hydraulic pressure resistant oil (4h) | ISO2812-1:2007 | Without abnormal |
| Acid resistance (10%H2SO4,168h) | ISO2812-1:2007 | Without abnormal |
| Alkali resistance (5%NaOH, 240h) | ISO2812-1:2007 | Without abnormal |
From detecting above data, anti-pollution wear-resistant paint prepared by the present invention has good tough and hard wear resistant, and easy cleaning is anti-pollution, outstanding chemical mediator-resitant property and antiseptic property.
Above one embodiment of the present of invention are had been described in detail, but described content is only preferred embodiment of the present invention, can not be considered to for limiting practical range of the present invention.All equalization variations of doing according to the present patent application scope and improvement etc., within all should still belonging to patent covering scope of the present invention.
Claims (10)
1. the anti-pollution wear-resistant paint of freight container that can conventional spraying, is characterized in that: this coating comprises host and solidifying agent, described host is for to be comprised of epoxy resin, wear-resisting functions filler, pigment, auxiliary agent, surface conditioner, epoxide diluent; Described solidifying agent is modification ring grease amine hardener;
Described host and solidifying agent are comprised of the component of following mass percent:
2. anti-pollution wear-resistant paint according to claim 1, is characterized in that: the mass ratio of described host and solidifying agent is 9:1.
3. according to the anti-pollution wear-resistant paint described in claim 1 or 2 any one, described epoxy resin is epoxy resin one by mass ratio: epoxy resin two=0.5-2:1 forms;
Wherein, epoxy resin one is a kind of low-viscosity, solvent-free epoxy resin, and oxirane value is 0.48～0.54eq/100g, solids content >=98%, and viscosity is 800-1400mPa.s at 25 ℃, average functionality is 2.0;
The solid epoxy that epoxy resin two is a kind of middle molecular weight, is dissolved in organic solvent, and oxirane value is 0.18～0.22eq/100g, solids content 75%, and average functionality is 2.0.
4. according to the anti-pollution wear-resistant paint described in claim 1 or 2 any one, it is characterized in that: described wear-resisting functions filler is comprised of separately high hardness wear-resisting filler, or mixed by high hardness wear-resisting filler and sheet inert filler.
5. anti-pollution wear-resistant paint according to claim 4, is characterized in that: described high hardness wear-resisting filler: sheet inert filler=6-12:4-10, the radius-thickness ratio of described sheet inert filler is 80-120.
6. anti-pollution wear-resistant paint according to claim 4, is characterized in that: described high hardness wear-resisting filler is aluminum oxide; Described sheet inert filler is a kind of or both mixtures in mica powder or talcum powder.
7. according to the anti-pollution wear-resistant paint described in claim 1 or 2 any one, it is characterized in that: surface conditioner comprises condition of surface control agent and water-wetted surface conditioning agent two portions, and the quality proportioning of condition of surface control agent and water-wetted surface conditioning agent is: 0.3:1-0.4:1.
8. anti-pollution wear-resistant paint according to claim 7, is characterized in that: described water-wetted surface conditioning agent is one or both the mixture in fluorinated polysiloxane compound.
9. according to the anti-pollution wear-resistant paint described in claim 1 or 2 any one, its feature with: described auxiliary agent is one or more in dispersion agent, coupling agent; Described pigment is a kind of or both mixtures in Rutile type Titanium Dioxide, carbon black.
10. a method of preparing the anti-pollution wear-resistant paint described in claim 1 or 2 any one, is characterized in that, comprises the steps:
(1) epoxy resin, auxiliary agent, surface conditioner, epoxide diluent are added in proportion, mix and process 10-20min;
(2) wear-resisting functions filler, pigment are added in said mixture, under the effect of high speed centrifugation dispersion machine, be dispersed to fineness and reach below 45 microns;
(3) after being mixed in proportion, host and solidifying agent obtain described anti-pollution wear-resistant paint.
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| CN201310530756.2A CN103555143B (en) | 2013-10-30 | 2013-10-30 | A kind of can the anti-pollution wear-resistant paint of freight container of Typical spray |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110732259A (en) * | 2019-10-24 | 2020-01-31 | 刘洋 | wear-resistant paint, processing system thereof and processing method of wear-resistant paint |
| CN116410646A (en) * | 2023-04-23 | 2023-07-11 | 上海德威涂料有限公司 | Powder coating suitable for recoating and application thereof |
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| US6576718B1 (en) * | 1999-10-05 | 2003-06-10 | General Electric Company | Powder coating of thermosetting resin(s) and poly(phenylene ethers(s)) |
| CN101955714A (en) * | 2009-07-21 | 2011-01-26 | 中涂化工（上海）有限公司 | High-performance primer coating for stainless steel container |
| CN102863873A (en) * | 2012-09-28 | 2013-01-09 | 中远关西涂料化工（天津）有限公司 | High solid epoxy paint for passive advanced pressurized water reactor nuclear power station and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6576718B1 (en) * | 1999-10-05 | 2003-06-10 | General Electric Company | Powder coating of thermosetting resin(s) and poly(phenylene ethers(s)) |
| CN101955714A (en) * | 2009-07-21 | 2011-01-26 | 中涂化工（上海）有限公司 | High-performance primer coating for stainless steel container |
| CN102863873A (en) * | 2012-09-28 | 2013-01-09 | 中远关西涂料化工（天津）有限公司 | High solid epoxy paint for passive advanced pressurized water reactor nuclear power station and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110732259A (en) * | 2019-10-24 | 2020-01-31 | 刘洋 | wear-resistant paint, processing system thereof and processing method of wear-resistant paint |
| CN116410646A (en) * | 2023-04-23 | 2023-07-11 | 上海德威涂料有限公司 | Powder coating suitable for recoating and application thereof |
| CN116410646B (en) * | 2023-04-23 | 2024-05-03 | 上海德威涂料有限公司 | Powder coating suitable for recoating and application thereof |
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Effective date of registration: 20230706 Address after: No. 518 Jinou Road, Jinshanwei Town, Jinshan District, Shanghai, December 2015 Patentee after: Shanghai Dewei Coatings Co.,Ltd. Address before: No. 57, 4th Street, Binhai Economic and Technological Development Zone, Tianjin 300457 (Development Zone) Patentee before: TIANJIN DOWILL PAINTS & CHEMICALS Co.,Ltd. |
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