CN102559012B - Undercoat resistant to flushing of high pressure liquid - Google Patents
Undercoat resistant to flushing of high pressure liquid Download PDFInfo
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- CN102559012B CN102559012B CN201210032070.6A CN201210032070A CN102559012B CN 102559012 B CN102559012 B CN 102559012B CN 201210032070 A CN201210032070 A CN 201210032070A CN 102559012 B CN102559012 B CN 102559012B
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Abstract
The invention relates to the technical field of undercoats and discloses an undercoat resistant to flushing of high pressure liquid. The undercoat consists of a component A and a component B, wherein the component A contains a film forming resin; the film forming resin is formed by an E-20 epoxy resin and an E-12 epoxy resin in a weight ratio of (1.5-4) : 1; the molecular weight of the E-20 epoxy resin is 800-1500, and the molecular weight of the E-12 epoxy resin is 1500-2000; the component B contains polyamide with an amine value of 400+/-20KOHmg equivalent weight/gram and a molecular weight of 500-1000; and the weight ratio of the film forming resin in the component A to a polyamide curing agent in the component B is (2.20-2.60) : 1. When engine casting blank work pieces coated with the undercoats are flushed under a pressure of 500MPa in the machining process, good bonding force between an undercoat layer and a base body can be realized, and an undercoat coating cannot be destroyed, thereby realizing long-term corrosion prevention of an engine after assembly and prolonging the service life of the engine.
Description
technical field
The present invention relates to primer base technical field, particularly a kind of priming paint of high pressure resistant liquid wash.
background technology
Engine is in manufacturing processed, and some producers adopt water-based antirust, realizes the rust prevention during manufacture of parts and blank, carries out integral body and spray paint after assembling.Yet, for the engine that cannot whole spray paint after assembling, must adopt blank elder generation spray base, carry out machining and assembling again.
For reaching the requirement of oil duct degree of cleaning, the blank of engine cylinder cover, crankcase (cylinder body) is at mach last procedure, to the hole of oil duct, to carry out the flushing of 500 bar pressures, to remove, be attached to the metal burr on hole wall, when rinsing, can be flushed to the outside surface of workpiece, and common prime coat can only bear the pressure of 7-30 bar, under the pressure of 500 bar, the common prime coat of workpiece surface all comes off.Domestic engine priming paint product is a lot, but cannot meet the rinsing requirement of 500 bar pressures in machining process.
summary of the invention
In order to solve the above problem without high pressure resistant 500 bar liquid wash priming paint, the invention provides a kind of can be resistance to the priming paint that rinses of 500 Bagao press liquids.
The present invention is achieved by the following measures:
The priming paint of high pressure resistant liquid wash, is comprised of A component and B component,
Wherein, in A component, contain film-forming resin, film-forming resin is comprised of according to weight ratio 1.5-4:1 E-20 epoxy resin and E-12 epoxy resin; E-20 molecular weight of epoxy resin is 800-1500, and E-12 molecular weight of epoxy resin is 1500-2000,
In B component, contain amine value and be 400 ± 20KOHmg equivalent/gram, the molecular weight polymeric amide that is 500-1000;
In A component, in film-forming resin and B component, the weight ratio of polyamide curing agent is 2.20-2.60:1.
Described priming paint, film-forming resin is comprised of according to weight ratio 2-3.5:1 E-20 epoxy resin and E-12 epoxy resin.
Described priming paint, in A component, in film-forming resin and B component, the weight ratio of polymeric amide is 2.30-2.45:1.
Described priming paint, film-forming resin is comprised of according to weight ratio 2:1,2.2:1 or 2.4:1 E-20 epoxy resin and E-12 epoxy resin.
Described priming paint, in A component, in film-forming resin and B component, the weight ratio of polymeric amide is 2.38:1,2.43:1 or 2.3:1.
Described priming paint, contains the resin of 7.5-22.6wt% in A component, contain the polymeric amide of 40-50wt% in B component.
Described priming paint, also contains at least one organic solvent and at least one color stuffing in described A component, the weight ratio of film-forming resin and color stuffing is 0.4-0.5:1.
Described priming paint, also contains wetting dispersing agent, flow agent and coupling agent in described A component.
Described priming paint, organic solvent is dimethylbenzene, butanols, solubility promoter and pimelinketone, for film-forming resin, dimethylbenzene, butanols and solubility promoter add in A component after being dissolved into liquid.
Described priming paint, is characterized in that described color stuffing is rust-stabilising pigment, filler and titanium dioxide, and the weight ratio of rust-stabilising pigment, filler and titanium dioxide is 30:9:4.5.
Because E-20 epoxy resin and E-12 epoxy resin are solid, so before preparation A component, need to two kinds of resin dissolves be become to resin liquid with the solvent of epoxy resin, just can carry out follow-up step.The solvent that dissolved epoxy is used, is that those of ordinary skill in the art can select to realize voluntarily, does not have special requirement, as long as can realize, that the epoxy resin of solid state is dissolved as to resin liquid is just passable.Also be that those skilled in the art can be according to practical situation designed, designed solid the containing of resin liquid.
The auxiliary agent using in A component, as wetting dispersing agent, flow agent, the auxiliary agent of coupling agent for often using in epoxy resin primer, does not just enumerate its type at this, and those of ordinary skill in the art can select voluntarily according to prior art or experience completely.
In A component, the selection of color stuffing is that use is in order to give the consideration of certain color and cost aspect to priming paint, those of ordinary skill in the art can be according to adjustment voluntarily such as the colors of priming paint, as long as the weight ratio of film-forming resin and color stuffing is in proper range, select the color stuffing of what kind, the high pressure resistant flushing performance of priming paint dry film is not had to too much influence.Described color stuffing is rust-stabilising pigment, filler and titanium dioxide.
Can change solid the containing also of B component according to practical situation, as long as polymeric amide and the ratio between film-forming resin that can meet are wherein just passable.
The purposes of priming paint according to the present invention, selects the E-12, E-20 epoxy resin of corrosion-resistant, good mechanical property as the matrix resin of A component, according to the process characteristic of the normal temperature of coating process or low-temperature curing, selects polyamide-based as B component in formula.After A, B component are mixed, the epoxy group(ing) of the amido of B component and A component is carried out polyaddition reaction, the network polymer of generating structure densification.On E-12, E-20 epoxy resin main chain, with a large amount of polarity hydroxyls, hydroxyl and metallic surface form strong chemical bond, make to combine closely between metallic matrix and undercoat, can bear the rinsing requirement of 500 bar pressures.The present invention, by the scope of the relative molecular mass of gate ring epoxy resins, can effectively control hydroxyl value and oxirane value, and then the bonding force between performance, product and the matrix of control product.
Although there are a lot of technique means to be used for improving the sticking power of priming paint in prior art, but high pressure resistant liquid wash performance is except the sticking power with priming paint is relevant, also there are much relations with a lot of other performances, so, the simple correlation technique means that improve priming paint sticking power in prior art, can not produce enlightenment effect to base paint formulation design of the present invention.
Beneficial effect of the present invention: the engine cast blank workpiece that applies priming paint of the present invention, when 500 bar pressures of machining processes rinse, can realize prime coat and matrix and have good bonding force, primer coating is not destroyed, thereby realize the anticorrosion for a long time of assembling rear engine, extend the work-ing life of engine.
Embodiment
For a better understanding of the present invention, below in conjunction with specific embodiment, further illustrate, if no special instructions, the umber using in following examples or percentage ratio are weight part or weight percent.The E-20 molecular weight of epoxy resin using in following examples is 800-1500, and E-12 molecular weight of epoxy resin is 1500-2000, daiamid value be 400 ± 20KOHmg equivalent/gram, molecular weight is 500-1000.
embodiment 1:
The priming paint of high pressure resistant liquid wash is prepared as follows:
(1) resin is miscible
By 28 parts of dimethylbenzene, 9 parts of butanols, 9 parts of solubility promoters, at the bottom of putting into reactor still, stir 10 minutes, add 33 parts of E-20 epoxy resin, 15 parts of E-12 epoxy resin, control temperature and stir 1 hour at 60-65 ℃, to liquid uniformly.
(2) preparation of A component
By 40 parts of the liquid making in (1), at the bottom of putting into reactor still, add 0.3 part of auxiliary agent A, auxiliary agent A is wetting dispersing agent, stir 10 minutes, evenly, add 30 parts of rust-stabilising pigments, 9 parts of fillers, 4.5 parts of titanium dioxides, stir after 2 hours, carry out mechanical mill, be ground to fineness 40um, add 1.6 parts of auxiliary agent B, 4.8 parts of pimelinketone, auxiliary agent B is flow agent, coupling agent, stirs.
(3) preparation of B component
By 48 parts of polymeric amide, 27 parts of dimethylbenzene, 26 parts of butanols, at the bottom of putting into reactor still, stir 10 minutes, to even.
Each Example formulations cartogram of table 1
The weight ratio of the color stuffing using in above-described embodiment 2-9 is with in embodiment 1.
high pressure resistant liquid wash performance test
1, by the priming paint preparing in above-described embodiment application as follows:
A component in each embodiment is mixed with B component ratio according to the rules, and with thinner, adjusting viscosity is 18s, with normal air spray gun or electrostatic gun spraying, spray pressure 400-550 kPa, wet wet interval 3 min, 80 ℃/30min of drying condition, the dry film thickness: 50-60 μ m of touching.Each embodiment is sprayed on identical material and the process ground of same treatment, to get rid of the impact of ground on the high pressure resistant liquid wash performance of priming paint.
Coating process flow process: ball blast → pressurized air dedusting → spraying (wetting, it is wet to touch, and sprays two times) → dry.
Before spraying, casting workpiece, through ball blast and dedusting, guarantees that workpiece surface is without oil, dustless.
2,500 Bagao press liquids rinse
By the workpiece of above-mentioned application, put into the special cleaning machine that can produce 500 bar pressures, rinsing liq can be the waterborne cleaning agent that tap water or pH value are 9.0～9.5, rinsing liq pressure 500 bar, highly pressurised liquid is apart from the distance 30mm of workpiece, flush time 18 seconds.
Detected result sees the following form 2.
Table 2 highly pressurised liquid rinses detected result cartogram
As can be seen from Table 2, the paint film that use E-20 and E-12 are compound rinses performances than the resistance to 500 Bagao press liquids that use the paint film that E-03 and E-06 are compound and will get well a lot, and the resistance to 500 Bagao press liquids flushing performances of the paint film of embodiment 1,3,4 are best.The priming paint that uses E-20 and the compound film forming matter of E-12 to make has excellent resistance to 500 Bagao press liquids and rinses performance, does not have in the prior art corresponding technology enlightenment.
Claims (8)
1. the priming paint of high pressure resistant liquid wash, is characterized in that being comprised of A component and B component,
Wherein, in A component, contain film-forming resin, film-forming resin is comprised of according to weight ratio 2-3.5:1 E-20 epoxy resin and E-12 epoxy resin; E-20 molecular weight of epoxy resin is 800-1500, and E-12 molecular weight of epoxy resin is 1500-2000,
In B component, contain amine value and be 400 ± 20KOHmg equivalent/gram, the molecular weight polymeric amide that is 500-1000;
In A component, in film-forming resin and B component, the weight ratio of polymeric amide is 2.20-2.60:1;
In described A component, also contain at least one organic solvent and at least one color stuffing, the weight ratio of film-forming resin and color stuffing is 0.4-0.5:1.
2. priming paint according to claim 1, is characterized in that in A component in film-forming resin and B component that the weight ratio of polymeric amide is 2.30-2.45:1.
3. priming paint according to claim 1, is characterized in that film-forming resin is comprised of according to weight ratio 2:1,2.2:1 or 2.4:1 E-20 epoxy resin and E-12 epoxy resin.
4. according to the priming paint described in claim 1 or 3, it is characterized in that in A component in film-forming resin and B component that the weight ratio of polymeric amide is 2.38:1,2.43:1 or 2.3:1.
5. priming paint according to claim 1, is characterized in that the resin that contains 7.5-22.6wt% in A component, contains the polymeric amide of 40-50wt% in B component.
6. priming paint according to claim 1, is characterized in that also containing wetting dispersing agent, flow agent and coupling agent in described A component.
7. priming paint according to claim 1, is characterized in that organic solvent is dimethylbenzene, butanols, solubility promoter and pimelinketone, and for film-forming resin, dimethylbenzene, butanols and solubility promoter add in A component after being dissolved into liquid.
8. priming paint according to claim 1, is characterized in that described color stuffing is rust-stabilising pigment, filler and titanium dioxide, and the weight ratio of rust-stabilising pigment, filler and titanium dioxide is 30:9:4.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210032070.6A CN102559012B (en) | 2012-02-14 | 2012-02-14 | Undercoat resistant to flushing of high pressure liquid |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210032070.6A CN102559012B (en) | 2012-02-14 | 2012-02-14 | Undercoat resistant to flushing of high pressure liquid |
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| CN102559012A CN102559012A (en) | 2012-07-11 |
| CN102559012B true CN102559012B (en) | 2014-07-30 |
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| CN105111890B (en) * | 2015-09-29 | 2016-11-02 | 长沙湘江生力重防腐涂料有限公司 | Painting and preparation method thereof in wind-driven generator tower epoxy |
| CN107652831A (en) * | 2016-07-23 | 2018-02-02 | 天津市新丽华色材有限责任公司 | It is a kind of that film system mirror mirror-back protective coating is being plated based on silicon |
| CN106221506B (en) * | 2016-08-30 | 2017-06-30 | 河北晨阳工贸集团有限公司 | A kind of epoxy emulsion and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671515A (en) * | 2009-09-01 | 2010-03-17 | 中国人民解放军海军后勤技术装备研究所 | Anticorrosive coating for concrete structure reinforcing bars and preparation method thereof |
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| CN100500776C (en) * | 2005-02-04 | 2009-06-17 | 上海康达化工有限公司 | Anti-corrosion coating layer for water pump, water pump containing same and construction method therefor |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101671515A (en) * | 2009-09-01 | 2010-03-17 | 中国人民解放军海军后勤技术装备研究所 | Anticorrosive coating for concrete structure reinforcing bars and preparation method thereof |
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