CN105385198A - Water-based strippable magnesium aluminum alloy casting coating and preparation method thereof - Google Patents
Water-based strippable magnesium aluminum alloy casting coating and preparation method thereof Download PDFInfo
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- CN105385198A CN105385198A CN201510919169.1A CN201510919169A CN105385198A CN 105385198 A CN105385198 A CN 105385198A CN 201510919169 A CN201510919169 A CN 201510919169A CN 105385198 A CN105385198 A CN 105385198A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/20—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for coatings strippable as coherent films, e.g. temporary coatings strippable as coherent films
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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Abstract
The invention discloses a water-based strippable magnesium aluminum alloy casting coating and a preparation method thereof. The coating is prepared from, by weight, 2-5 parts of lithium base bentonite, 25-30 parts of modified attapulgite powder, 5-10 parts of nanometer zirconia powder, 5-8 parts of graphite powder, 3-5 parts of chromite powder, 10-15 parts of a binder, 2-4 parts of a dispersant, 40-45 parts of deionized water and 0.1-0.5 parts of an antifoaming agent. The coating is coated on the surface of a sand molding die, has good wettability, brushability, permeability and strength, and has good stability, heat insulation property and slag absorbing capability in the magnesium aluminum alloy liquid casting process, a coating layer adhered to the surface of the magnesium aluminum alloy has good strippability when the coating layer is cold, and obtained magnesium aluminum alloy castings have clear contours and bright and clean surfaces.
Description
Technical field
The invention belongs to technical field of paint preparation, relate to a kind of water base exfoliated casting magnesium aluminum alloy coating and preparation method thereof.
Background technology
Magnalium is as lighter structural metallic materials (density is at 1.65 ~ 1.73g/cm3), have that specific tenacity is high, good rigidly, shock resistance and damping performance are excellent, be used widely in fields such as aerospace and national defense industry, automobile and electronic industries.
At present, 90% magnalium foundry goods adopts die cast, and minority adopts gravity sand mold casting.Investment is large, technical requirements is high because die casting exists for die cast, market adaptability to changes difference and can not constrain it as high strength stressed member etc. and greatly develop; And traditional sand mold casting particle is thicker, the surface quality of continuous castings obtained is poor, forming accuracy is low, and because magnalium is active by force, be easy to the features such as oxidation and burning, in permanent mold casting process, very easily produce reactive slag pore in mould contact surface, not only affect the quality of foundry goods but also result in the waste of magnalium raw material.
Patent CN103694872A describes a kind of water-based Stripable paint composition, and this coating composition contains aliphatic polyurethane dispersion, aliphatic poly ester dispersion, film coalescence aid and water, the rete snappiness of preparation and adhesivity good.There is stripping performance good, can big area entirety peel off, and the ability that film can be processed further, but this rete is heat-resisting and acidproof, resistance to alkali ability is poor, the temperature of 80 DEG C can only be born, the acid and alkali corrosion effect of lower solubility, patent CN201010592499 describes a kind of water-based paint compositions of strip(pable)coating protective membrane, comprise synthetic resin emulsion, sticking power conditioning agent, color stuffing, defoamer, dispersion agent, thickening material, sanitas, ethanol, deionized water, but rete water tolerance prepared by said composition and solvent resistance undesirable, and the snappiness of coating prepared of aforementioned coating composition and adhesivity do not reach desirable, be not suitable for further processing.Casting Mg alloy with metal mould coating prepared by patent CN103143673B, effectively can solve the problem that magnesium alloy is easy to be oxidized and burn, but coating is applicable to metal mold grinding tool, requires higher.
Therefore, necessaryly prior art to be improved, to solve the deficiency of prior art.
Summary of the invention
The object of the invention is to the defect overcoming prior art, a kind of water base exfoliated casting magnesium aluminum alloy coating with good stability is provided, this paint is at sand mold abrasive surface, there is good wetting property, brushing property, ventilation property and intensity, there is good stability, heat retaining property and slag absorbing ability in magnalium liquid casting process, during the coating cooling of surface of magnesium aluminium alloy attachment, there is good separability, obtain foundry goods clear-cut, any surface finish of magnalium.
Another object of the present invention is to the preparation method providing this water base exfoliated casting magnesium aluminum alloy coating, the method is without harmful substance, free from environmental pollution, and construction technology is simple, requires low, be applicable to factory and use on a large scale grinding tool.
Above-mentioned purpose is achieved by the following technical solution:
A kind of water base exfoliated casting magnesium aluminum alloy coating, is prepared from by the raw material of following weight part: lithium bentonite 2 ~ 5 parts, modified attapulgite powder 25 ~ 30 parts, nano-zirconia powder 5 ~ 10 parts, Graphite Powder 99 5 ~ 8 parts, chromite powder 3 ~ 5 parts, binding agent 10 ~ 15 parts, dispersion agent 2 ~ 4 parts, deionized water 40 ~ 45 parts, defoamer 0.1 ~ 0.5 part.
Preferably, described binding agent selects mass ratio to be the mixed solution that the polyvinyl formal solution of 1:0.5 ~ 1:1 and sodium silicate solution are prepared; Wherein, the mass concentration of polyvinyl formal solution is 10%, and the solid content of sodium silicate solution is 35%.
Preferably, described dispersion agent selects ammonium polyacrylate.
Preferably, dimethyl polysiloxane selected by described defoamer.
The preparation method of described water base exfoliated casting magnesium aluminum alloy coating, comprises the steps:
(1) preparation process of modified attapulgite powder:
A. weighing fineness is that 200 ~ 400 object attapulgite clays put into distilled water, processes 1 ~ 3 hour, then stir 2 ~ 4 hours obtained suspension after adding hydrochloric acid in the condition of 80 ~ 100 DEG C, for subsequent use; Wherein, 8 ~ 10ml distilled water is added in every gram of attapulgite clay; Add 0.5 ~ 1.0ml hydrochloric acid in every gram of attapulgite clay, concentration of hydrochloric acid is lmol/L;
B. add composite reactive agent in the suspension prepared to steps A, drip pH value to 6 ~ 8 of NaOH solution adjustment suspension, then stir further prepare suspension in 2 ~ 4 hours, for subsequent use; Wherein, the agent of 0.05 ~ 0.1ml composite reactive is added in every gram of attapulgite clay;
C. the suspension prepared by step B with 3000 ~ 4000r/min rotating speed centrifugal treating, 5 ~ 10min, solids 70 ~ 100 DEG C oven dry of recovery, porphyrize, obtains described modified attapulgite powder;
(2) preparation process of water base exfoliated casting magnesium aluminum alloy coating:
A. modified attapulgite powder step (1) prepared, lithium bentonite, nano-zirconia powder, Graphite Powder 99, chromite powder prepare material by proportioning, put into planetary ball mill with the rotating speed ball milling 1 ~ 3h of 150 ~ 200 turns/min, cross 200 ~ 350 order dusting covers and obtain mixture;
B. said mixture is mixed with water, and add dispersion agent, put into ball mill with the rotating speed ball milling 1 ~ 3h of 150 ~ 200 turns/min, then add binding agent and defoamer, continue with the rotating speed ball milling 1 ~ 3h of 150 ~ 200 turns/min, obtain water base exfoliated casting magnesium aluminum alloy coating.
Preferably, described in step (1) B, composite reactive agent includes organic compounds and nonionic surface active agent, and the volume ratio of this organic compound and nonionic surface active agent is 1:1 ~ 1:2.
Preferably, described organic compound selects organopolysiloxane or organic carboxyl acid, and described nonionic surface active agent selects alkylphenol polyoxyethylene type promoting agent, sorbitan fatty acid ester type promoting agent or tween 20 type promoting agent.
Preferably, described organopolysiloxane selects epoxy group(ing) polysiloxane, and described organic carboxyl acid selects stearic acid.
Beneficial effect of the present invention:
(1) this paint is at sand mold abrasive surface, there is good wetting property, brushing property, ventilation property and intensity, there is good stability, heat retaining property and slag absorbing ability in magnalium liquid casting process, have exfoliated preferably during the coating cooling of surface of magnesium aluminium alloy attachment, obtain foundry goods clear-cut, any surface finish of magnalium.
(2) modified attapulgite powder suspension property in aqueous improves, and utilizes the layer chain-like structure of its specialty fibers shape crystal habit, can form space net structure in aqueous under the effect of lithium bentonite, emulsifying agent, dispersion agent; Nano zirconium oxide powder activity is high, can be adsorbed on modified attapulgite powder surface, improve the high thermal resistance of rete; Graphite has very high refractoriness and thermo-chemical stability, there is certain heat-blocking action, the ability of magnesium liquid filling casting mold can be improved, improve the mold use life-span, can react and easily be attached to sand mold abrasive surface by high temperature not extremely strong with oxidation capacity magnalium.
(3) preparation method provided by the invention is without harmful substance, free from environmental pollution, and construction technology is simple, requires low, be applicable to factory and use on a large scale grinding tool.
Embodiment
Technical scheme of the present invention is described in detail below in conjunction with specific embodiment.
The attapulgite clay that attapulgite clay used adopts No. 201210083674.3 patent systems standby.
Dispersion agent is that nanometer ceramic technology development corporation, Ltd. of Nanjing clouds section produces product SD-00, and main component is ammonium polyacrylate.
Embodiment 1: the preparation of water base exfoliated casting magnesium aluminum alloy coating
Comprise the steps:
(1) preparation process of modified attapulgite powder:
A. weighing fineness is that 200 ~ 400 object attapulgite clays put into distilled water, processes 2 hours, then stir 3 hours obtained suspension after adding hydrochloric acid in the condition of 90 DEG C, for subsequent use; Wherein, 9ml distilled water is added in every gram of attapulgite clay; Add 0.8ml hydrochloric acid in every gram of attapulgite clay, concentration of hydrochloric acid is lmol/L;
B. add composite reactive agent in the suspension prepared to steps A, drip the pH value to 7 of NaOH solution adjustment suspension, then stir prepare suspension in 3 hours, for subsequent use; Wherein, the agent of 0.08ml composite reactive is added in every gram of attapulgite clay; Composite reactive agent is the volume ratio of epoxy group(ing) polysiloxane and alkylphenol polyoxyethylene is 1:1;
C. the suspension 3500r/min centrifugal treating 8min prepared by step B, the solids 85 DEG C oven dry of recovery, porphyrize, obtains described modified attapulgite powder.
In above-mentioned steps, composite reactive agent includes organic compounds and nonionic surface active agent, organic compound can use epoxy group(ing) polysiloxane or stearic acid, and nonionic surface active agent can use alkylphenol polyoxyethylene, sorbitan fatty acid ester or tween 20.
(2) preparation process of water base exfoliated casting magnesium aluminum alloy coating:
A. get modified attapulgite powder 30g prepared by step (1), lithium bentonite 4g, nano-zirconia powder 8g, Graphite Powder 99 6g, chromite powder 5g planet mill with the rotating speed ball milling 3h of 188 turns/min, 200 order dusting covers sieve to obtain mixture;
B. said mixture is mixed with 45g water, add dispersion agent 3g, put into ball mill with the rotating speed ball milling 3h of 188 turns/min, add binding agent 10g and defoamer 0.1g again, put into ball mill again with the rotating speed ball milling 3h of 188 turns/min, obtain water base exfoliated casting magnesium aluminum alloy coating, wherein, dispersion agent is ammonium polyacrylate, binding agent selects mass ratio to be the mixed solution that polyvinyl formal solution (mass concentration is 10%) and the sodium silicate solution (solid content is 35%) of 1:0.8 is prepared, and defoamer is dimethyl polysiloxane.
Embodiment 2: the preparation of water base exfoliated casting magnesium aluminum alloy coating
Comprise the steps:
(1) preparation process of modified attapulgite powder:
See embodiment 1.
(2) preparation process of water base exfoliated casting magnesium aluminum alloy coating:
A. get modified attapulgite powder 25g prepared by step (1), lithium bentonite 5g, nano-zirconia powder 10g, Graphite Powder 99 6g, chromite powder 5g planet mill with the rotating speed ball milling 3h of 188 turns/min, 200 order dusting covers sieve to obtain mixture;
B. said mixture is mixed with 45g water, add dispersion agent 4g, put into ball mill with the rotating speed ball milling 2h of 188 turns/min, add binding agent 15g and defoamer 0.5g again, put into ball mill again with the rotating speed ball milling 3h of 188 turns/min, obtain water base exfoliated casting magnesium aluminum alloy coating, wherein, dispersion agent is ammonium polyacrylate, binding agent selects mass ratio to be the mixed solution that polyvinyl formal solution (mass concentration is 10%) and the sodium silicate solution (solid content is 35%) of 1:0.8 is prepared, and defoamer is dimethyl polysiloxane.
Embodiment 3: the preparation of water base exfoliated casting magnesium aluminum alloy coating
Comprise the steps:
(1) preparation process of modified attapulgite powder:
A. weighing fineness is that 200 object attapulgite clays put into distilled water, processes 1 hour, then stir 2 hours obtained suspension after adding hydrochloric acid in the condition of 80 DEG C, for subsequent use; Wherein, 8ml distilled water is added in every gram of attapulgite clay; Add 0.5ml hydrochloric acid in every gram of attapulgite clay, concentration of hydrochloric acid is lmol/L;
B. add composite reactive agent in the suspension prepared to steps A, drip the pH value to 6 of NaOH solution adjustment suspension, then stir prepare suspension in 2 hours, for subsequent use; Wherein, the agent of 0.05ml composite reactive is added in every gram of attapulgite clay; Composite reactive agent is the volume ratio of epoxy group(ing) polysiloxane and alkylphenol polyoxyethylene is 1:1;
C. the suspension 3000r/min centrifugal treating 10min prepared by step B, the solids 70 DEG C oven dry of recovery, porphyrize, obtains described modified attapulgite powder.
In above-mentioned steps, composite reactive agent includes organic compounds and nonionic surface active agent, organic compound can use epoxy group(ing) polysiloxane or stearic acid, and nonionic surface active agent can use alkylphenol polyoxyethylene, sorbitan fatty acid ester or tween 20.
(2) preparation process of water base exfoliated casting magnesium aluminum alloy coating:
A. get modified attapulgite powder 25g prepared by step (1), lithium bentonite 2g, nano-zirconia powder 5g, Graphite Powder 99 5g, chromite powder 3g planet mill with the rotating speed ball milling 3h of 150 turns/min, 200 order dusting covers sieve to obtain mixture;
B. said mixture is mixed with 40g water, add dispersion agent 2g, put into ball mill with the rotating speed ball milling 3h of 150 turns/min, add binding agent 10g and defoamer 0.1g again, put into ball mill again with the rotating speed ball milling 3h of 150 turns/min, obtain water base exfoliated casting magnesium aluminum alloy coating, wherein, dispersion agent is ammonium polyacrylate, binding agent selects mass ratio to be the mixed solution that polyvinyl formal solution (mass concentration is 10%) and the sodium silicate solution (solid content is 35%) of 1:0.8 is prepared, and defoamer is dimethyl polysiloxane.
Embodiment 4: the preparation of water base exfoliated casting magnesium aluminum alloy coating
Comprise the steps:
(1) preparation process of modified attapulgite powder:
A. weighing fineness is that 400 object attapulgite clays put into distilled water, processes 3 hours, then stir 4 hours obtained suspension after adding hydrochloric acid in the condition of 100 DEG C, for subsequent use; Wherein, 10ml distilled water is added in every gram of attapulgite clay; Add 1.0ml hydrochloric acid in every gram of attapulgite clay, concentration of hydrochloric acid is lmol/L;
B. add composite reactive agent in the suspension prepared to steps A, drip the pH value to 8 of NaOH solution adjustment suspension, then stir prepare suspension in 4 hours, for subsequent use; Wherein, the agent of 0.1ml composite reactive is added in every gram of attapulgite clay; Composite reactive agent is the volume ratio of epoxy group(ing) polysiloxane and alkylphenol polyoxyethylene is 1:2;
C. the suspension 4000r/min centrifugal treating 5min prepared by step B, the solids 100 DEG C oven dry of recovery, porphyrize, obtains described modified attapulgite powder.
In above-mentioned steps, composite reactive agent includes organic compounds and nonionic surface active agent, organic compound can use epoxy group(ing) polysiloxane or stearic acid, and nonionic surface active agent can use alkylphenol polyoxyethylene, sorbitan fatty acid ester or tween 20.
(2) preparation process of water base exfoliated casting magnesium aluminum alloy coating:
A. get modified attapulgite powder 30g prepared by step (1), lithium bentonite 5g, nano-zirconia powder 10g, Graphite Powder 99 8g, chromite powder 5g planet mill with the rotating speed ball milling 1h of 200 turns/min, 350 order dusting covers sieve to obtain mixture;
B. said mixture is mixed with 45g water, add dispersion agent 4g, put into ball mill with the rotating speed ball milling 1h of 200 turns/min, add binding agent 15g and defoamer 0.5g again, put into ball mill again with the rotating speed ball milling 3h of 150 turns/min, obtain water base exfoliated casting magnesium aluminum alloy coating, wherein, dispersion agent is ammonium polyacrylate, binding agent selects mass ratio to be the mixed solution that polyvinyl formal solution (mass concentration is 10%) and the sodium silicate solution (solid content is 35%) of 1:0.8 is prepared, and defoamer is dimethyl polysiloxane.
Embodiment 5: effect example
Water base exfoliated casting magnesium aluminum alloy paint spay-coating prepared by Example 1 and embodiment 2 is at sand mold abrasive surface, and spraying number of times is 3 ~ 4 times, after once spraying just can must carry out after the front film once sprayed is done solid work.Final coating thickness is 0.08mm ~ 0.09mm, is cast in sand mold grinding tool shaping by magnalium liquid.Film is at room temperature placed and within 7 days, is carried out the test of tensile strength, stripping strength, water tolerance and resistance to salt water respectively, and last test result is as shown in table 1.
The water base stripping lacquer performance index that table 1 embodiment prepares
Embodiment 3 is similar with coating property prepared by embodiment 2 to embodiment 1 with coating prepared by embodiment 4.
As seen from the above table, coating of the present invention can be used for being coated on metallic substrate surface, utilize characteristic and the interaction thereof of each material, rete is formed in metallic substrate surface, can resistance to 700 DEG C of high temperature, life-time service without significantly coming off, the phenomenon such as fluffing, there is good water-fast, acid and alkali-resistance and weather resistance, and the emulsifying agent added in coating of the present invention and coupling agent make rete have good snappiness and rippability, simply big area entirety can peel off, may be used for the provisional protection of product and component.
The effect of above-described embodiment is essentiality content of the present invention is described, but does not limit protection scope of the present invention with this.Those of ordinary skill in the art should be appreciated that and can modify to technical scheme of the present invention or equivalent replacement, and does not depart from essence and the protection domain of technical solution of the present invention.
Claims (8)
1. a water base exfoliated casting magnesium aluminum alloy coating, is characterized in that: be prepared from by the raw material of following weight part: lithium bentonite 2 ~ 5 parts, modified attapulgite powder 25 ~ 30 parts, nano-zirconia powder 5 ~ 10 parts, Graphite Powder 99 5 ~ 8 parts, chromite powder 3 ~ 5 parts, binding agent 10 ~ 15 parts, dispersion agent 2 ~ 4 parts, deionized water 40 ~ 45 parts, defoamer 0.1 ~ 0.5 part.
2. water base exfoliated casting magnesium aluminum alloy coating as claimed in claim 1, is characterized in that: described binding agent selects mass ratio to be the mixed solution that the polyvinyl formal solution of 1:0.5 ~ 1:1 and sodium silicate solution are prepared; Wherein, the mass concentration of polyvinyl formal solution is 10%, and the solid content of sodium silicate solution is 35%.
3. water base exfoliated casting magnesium aluminum alloy coating as claimed in claim 1, is characterized in that: described dispersion agent selects ammonium polyacrylate.
4. water base exfoliated casting magnesium aluminum alloy coating as claimed in claim 1, is characterized in that: dimethyl polysiloxane selected by described defoamer.
5. the preparation method of the arbitrary described water base exfoliated casting magnesium aluminum alloy coating of Claims 1 to 4, is characterized in that comprising the steps:
(1) preparation process of modified attapulgite powder:
A. weighing fineness is that 200 ~ 400 object attapulgite clays put into distilled water, processes 1 ~ 3 hour, then stir 2 ~ 4 hours obtained suspension after adding hydrochloric acid in the condition of 80 ~ 100 DEG C, for subsequent use; Wherein, 8 ~ 10ml distilled water is added in every gram of attapulgite clay; Add 0.5 ~ 1.0ml hydrochloric acid in every gram of attapulgite clay, concentration of hydrochloric acid is lmol/L;
B. add composite reactive agent in the suspension prepared to steps A, drip pH value to 6 ~ 8 of NaOH solution adjustment suspension, then stir further prepare suspension in 2 ~ 4 hours, for subsequent use; Wherein, the agent of 0.05 ~ 0.1ml composite reactive is added in every gram of attapulgite clay;
C. the suspension prepared by step B with 3000 ~ 4000r/min rotating speed centrifugal treating, 5 ~ 10min, solids 70 ~ 100 DEG C oven dry of recovery, porphyrize, obtains described modified attapulgite powder;
(2) preparation process of water base exfoliated casting magnesium aluminum alloy coating:
A. modified attapulgite powder step (1) prepared, lithium bentonite, nano-zirconia powder, Graphite Powder 99, chromite powder prepare material by proportioning, put into planetary ball mill with the rotating speed ball milling 1 ~ 3h of 150 ~ 200 turns/min, cross 200 ~ 350 order dusting covers and obtain mixture;
B. said mixture is mixed with water, and add dispersion agent, put into ball mill with the rotating speed ball milling 1 ~ 3h of 150 ~ 200 turns/min, then add binding agent and defoamer, continue with the rotating speed ball milling 1 ~ 3h of 150 ~ 200 turns/min, obtain water base exfoliated casting magnesium aluminum alloy coating.
6. preparation method as claimed in claim 5, it is characterized in that: described in step (1) B, composite reactive agent includes organic compounds and nonionic surface active agent, the volume ratio of this organic compound and nonionic surface active agent is 1:1 ~ 1:2.
7. preparation method as claimed in claim 6, it is characterized in that: described organic compound selects organopolysiloxane or organic carboxyl acid, described nonionic surface active agent selects alkylphenol polyoxyethylene type promoting agent, sorbitan fatty acid ester type promoting agent or tween 20 type promoting agent.
8. preparation method as claimed in claim 7, it is characterized in that: described organopolysiloxane selects epoxy group(ing) polysiloxane, described organic carboxyl acid selects stearic acid.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107474931A (en) * | 2017-07-21 | 2017-12-15 | 南京信息工程大学 | A kind of water-based recessed soil matrix casting mold-releasing agent and preparation method thereof |
| CN111167997A (en) * | 2019-12-31 | 2020-05-19 | 南京信息工程大学 | Aluminum alloy water-based casting coating and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104327555A (en) * | 2014-11-25 | 2015-02-04 | 南京信息工程大学 | Water-based strippable coating and preparation method thereof |
| CN104559763A (en) * | 2015-02-03 | 2015-04-29 | 南京信息工程大学 | Alcohol-base strippable paint and preparation method thereof |
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2015
- 2015-12-11 CN CN201510919169.1A patent/CN105385198B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104327555A (en) * | 2014-11-25 | 2015-02-04 | 南京信息工程大学 | Water-based strippable coating and preparation method thereof |
| CN104559763A (en) * | 2015-02-03 | 2015-04-29 | 南京信息工程大学 | Alcohol-base strippable paint and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107474931A (en) * | 2017-07-21 | 2017-12-15 | 南京信息工程大学 | A kind of water-based recessed soil matrix casting mold-releasing agent and preparation method thereof |
| CN111167997A (en) * | 2019-12-31 | 2020-05-19 | 南京信息工程大学 | Aluminum alloy water-based casting coating and preparation method thereof |
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