CN102585695A - Flexible coating for aluminum alloy and preparation method of flexible coating - Google Patents
Flexible coating for aluminum alloy and preparation method of flexible coating Download PDFInfo
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- CN102585695A CN102585695A CN2011104477567A CN201110447756A CN102585695A CN 102585695 A CN102585695 A CN 102585695A CN 2011104477567 A CN2011104477567 A CN 2011104477567A CN 201110447756 A CN201110447756 A CN 201110447756A CN 102585695 A CN102585695 A CN 102585695A
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Abstract
The invention discloses a flexible coating for aluminum alloy and a preparation method of the flexible coating. The flexible coating comprises the following materials by weight percent: 10 to 20 percent of silicic acid compound, and 15 to 25 percent of organic silicon resin. The preparation method comprises the following steps: (1) weighing certain quantities of silicic acid compound liquor, deionized water and anhydrous ethyl alcohol, pouring the silicic acid compound liquor, the deionized water and the anhydrous ethyl alcohol into a beaker, stirring for 20 min under magnetic force, adjusting the PH valve with concentrated hydrochloric acid, and then stirring for 3 h till the mixture is completely hydrolyzed; (2) weighing 100 g of the mixture in the step (1), placing the 100 g of the mixture into a constant-temperature water bath kettle, heating, stirring, adding organic silicon resin, deionized water, solvent and flatting agent which are weighed into the mixture sequentially, and carrying out hydrolytic condensation reaction; and (3) preparing a layer of film on the surface of aluminum alloy by utilizing the mixture obtained in the step (2), airing at ordinary temperature for 10 min, and curing at 200 DEG C constant temperature for 30 min so as to obtain the flexible coating. The coating has the performances of scratching resistance, corrosion resistance, flexibility and the like, and is transparent so as not to impact the metal texture of aluminum alloy.
Description
Technical field
The present invention relates to a kind of duraluminum and use coating, specifically is a kind of flexible coating that is used for duraluminum and preparation method thereof.
Background technology
Duraluminum since characteristics such as light weight, metal sense are strong, easy-formation processing be widely used in the decoration fields such as household electrical appliances and consumer electronics.This is prone to aluminium be corroded in air, causes its surface blackening and produces spot.Traditional guard method is to adopt anode oxidation process, generates layer oxide film on the aluminium surface, and the erosion resistance of this film, scoring resistance are all preferable.
Household electrical appliances and electronic product shape are various, and some product needed prepare through punching press, therefore need duraluminum and resist thereof to have certain snappiness.And the staple of conventional anodization film is an aluminum oxide, and hardness is higher, and therefore fragmentation easy to crack in punching course needs to adopt additive method to carry out the aluminium sheet protection.For some high-end specular aluminium industries, then higher to the requirement of coating.In order not destroy the metal sense of specular aluminium, coating should be transparent color, has therefore limited the use of some flexible additives.
Through retrieval to prior art; Chinese invention patent: a kind of preparation method of transparent organic hydrophobic coating on surface of aluminum plate; Application number: 201010209102.6, the disclosed coating of this patent can effectively be resisted the corrosion of acidic solution, and aluminium sheet is had very high sticking power; With the aluminium sheet doubling time, still do not ftracture, come off, the transmittance of coating reaches 96% in addition.But this material belongs to organic materials, and hardness is lower, and weathering resistance is poor, and along with the prolongation of duration of service, coating can be turned to be yellow and become fragile.In order to make product have longer work-ing life, should select for use a kind of high performance coating that duraluminum is protected.
Summary of the invention
The objective of the invention is to solve above-mentioned deficiency of the prior art, a kind of flexible coating that is used for duraluminum and preparation method thereof is provided, this coating not only erosion resistance and scratch resistance is good, and can be struck out different shape by any bending.
The present invention realizes through following technical scheme:
A kind of flexible coating that is used for duraluminum comprises silicate compound and silicone resin, and wherein, the mass percent that said silicate compound accounts for total system is 10-20%, and the mass percent that said silicone resin accounts for total system is 15-25%.
A kind of preparation method who is used for the flexible coating of duraluminum is characterized in that, comprises the steps:
(1) take by weighing a certain amount of silicate compound solution, deionized water and absolute ethyl alcohol, pour beaker into, magnetic agitation 20min regulates pH value with concentrated hydrochloric acid, continues to stir 3h and makes its abundant hydrolysis;
(2) take by weighing the mixture that 100g step (1) prepares, put into the thermostat water bath heated and stirred, more load weighted silicone resin, deionized water, solvent and flow agent are poured into wherein successively, condensation reaction is hydrolyzed;
(3) said mixture that utilizes step (2) to obtain prepares a skim in aluminum alloy surface, after normal temperature dries 10min, under 200 ℃ constant temperature, solidifies 30min, promptly obtains described flexible coating.
Said silicate compound comprises a kind of in methyl silicate and the tetraethoxy or both proportioning things.
Said silicone resin comprises γ-An Bingjisanyiyangjiguiwan, methyltrimethoxy silane, γ-(methacryloxypropyl) propyl trimethoxy silicane and gathers one or more the proportioning thing in the Union carbide A-162.
The quality of said step (1) mesosilicic acid compound solution, deionized water and absolute ethyl alcohol is respectively 70-140g, 110-150g and 100-130g.
PH value is 5-6 in the said step (1).
Solvent in the said step (2) is one or more in Virahol, ethanol, butyl ester, butanone and the propylene glycol monomethyl ether.
The quality of silicone resin, deionized water, solvent and flow agent is respectively 30-50g, 20-30g, 25-35g and 5g in the said step (2).
The method for preparing film in the said step (3) comprises dip-coating method, spin-coating method and spraying method.
Said step (3) adopts dip-coating method, prepares a skim with the pull rate of 5mm/s in aluminum alloy surface.
Said step (3) adopts spin-coating method at the aluminium alloy plate surface coatings, and spin speed is 800r/min, and the time is 60s.
Said step (3) adopts spraying method, prepares a skim in aluminum alloy surface.
Compared with prior art, meliority of the present invention and beneficial effect are, can improve the sull fragility problem that conventional anodization is handled, and give the aluminium snappiness, can arbitrarily bend punching press; Performances such as the erosion resistance of this coating, scoring resistance are all very excellent, and are transparent color, do not influence the apparent effect of aluminium.
Embodiment
Elaborate in the face of embodiments of the invention down: present embodiment provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment being to implement under the prerequisite with technical scheme of the present invention.
Embodiment 1
Present embodiment provides a kind of flexible coating that is used for duraluminum, comprises silicate compound and silicone resin, and wherein, the mass percent that silicate compound accounts for total system is 10-20%, and the mass percent that silicone resin accounts for total system is 15-25%.Wherein, silicate compound comprises a kind of in methyl silicate and the tetraethoxy or both proportioning things; Silicone resin comprises γ-An Bingjisanyiyangjiguiwan, methyltrimethoxy silane, γ-(methacryloxypropyl) propyl trimethoxy silicane and gathers one or more the proportioning thing in the Union carbide A-162.
Following examples are the method embodiment of embodiment 1, comprise the steps:
(1) take by weighing a certain amount of silicate compound solution, deionized water and absolute ethyl alcohol, pour beaker into, magnetic agitation 20min regulates pH value with concentrated hydrochloric acid, continues to stir 3h and makes its abundant hydrolysis;
(2) take by weighing the mixture that 100g step (1) prepares, put into the thermostat water bath heated and stirred, more load weighted silicone resin, deionized water, solvent and flow agent are poured into wherein successively, condensation reaction is hydrolyzed;
(3) said mixture that utilizes step (2) to obtain prepares a skim in aluminum alloy surface, after normal temperature dries 10min, under 200 ℃ constant temperature, solidifies 30min, promptly obtains described flexible coating.
Be specially:
Embodiment 2
Take by weighing 100g teos solution, 130g deionized water and 120g absolute ethyl alcohol, pour beaker into, magnetic agitation 20min.Regulate pH value to 5 with concentrated hydrochloric acid, continue to stir 3h and make its hydrolysis; Take by weighing the mixture of 100g, put into the thermostat water bath heated and stirred, 30g γ-An Bingjisanyiyangjiguiwan, 30g deionized water, 35g Virahol, 5g flow agent are poured into wherein successively again, condensation reaction is hydrolyzed; Utilize the mixture of above-mentioned preparation, adopt dip-coating method technology, prepare a skim in aluminum alloy surface with the pull rate of 5mm/s.After normal temperature is placed 10min, under 200 ℃ constant temperature, solidify 30min, promptly obtain described flexible coating.
Prepared coating does not ftracture in 90 ° bending test, and hardness is 3H, and the surface has sends out color phenomenon, and coatingsurface has more pin hole phenomenon, anti-cupric ion acceleration salt-fog test 80h.
Embodiment 3
Take by weighing 100g teos solution, 130g deionized water and 120g absolute ethyl alcohol, pour beaker into, magnetic agitation 20min.Regulate pH value to 5 with concentrated hydrochloric acid, continue to stir 3h and make its hydrolysis; Take by weighing the mixture of 100g, put into the thermostat water bath heated and stirred, 50g γ-An Bingjisanyiyangjiguiwan, 20g deionized water, 25g Virahol, 5g flow agent are poured into wherein successively again, condensation reaction is hydrolyzed; Utilize the mixture of above-mentioned preparation, adopt dip-coating method technology, prepare a skim in aluminum alloy surface with the pull rate of 5mm/s.After normal temperature is placed 10min, under 200 ℃ constant temperature, solidify 30min, promptly obtain described flexible coating.
Prepared coating does not ftracture in 90 ° bending test, and hardness is 3H, the acomia color phenomenon in surface, and coatingsurface has few pin hole phenomenon, and anti-cupric ion quickens salt-fog test 73h.
Embodiment 4
Take by weighing 140g teos solution, 110g deionized water and 100g absolute ethyl alcohol, pour beaker into, magnetic agitation 20min.Regulate pH value to 5 with concentrated hydrochloric acid, continue to stir 3h and make its hydrolysis; Take by weighing the mixture of 100g, put into the thermostat water bath heated and stirred, 40g γ-An Bingjisanyiyangjiguiwan, 25g deionized water, 30 Virahols, 5g flow agent are poured into wherein successively again, condensation reaction is hydrolyzed; Utilize the mixture of above-mentioned preparation, adopt dip-coating method technology, prepare a skim in aluminum alloy surface with the pull rate of 5mm/s.After normal temperature is placed 10min, under 200 ℃ constant temperature, solidify 30min, promptly obtain described flexible coating.
Prepared coating is cracking in 90 ° bending test, and hardness is 4H, the acomia color phenomenon in surface, and coatingsurface has trickle pin hole phenomenon, and anti-cupric ion quickens salt-fog test 95h.
Embodiment 5
Take by weighing 70g teos solution, 150g deionized water and 130g absolute ethyl alcohol, pour beaker into, magnetic agitation 20min.Regulate pH value to 6 with concentrated hydrochloric acid, continue to stir 3h and make its hydrolysis; Take by weighing the mixture of 100g, put into the thermostat water bath heated and stirred, 40g γ-An Bingjisanyiyangjiguiwan, 25g deionized water, 30 Virahols, 5g flow agent are poured into wherein successively again, the condensation reaction that is hydrolyzed is prepared into hybrid collosol; Adopt spin-coating method at the aluminium alloy plate surface coatings, spin speed is 800r/min, and the time is 60s.After spin coating finished, normal temperature was placed 10min, under 200 ℃ constant temperature, solidified 30min then, promptly obtained described flexible coating.
Prepared coating does not ftracture in 90 ° bending test, and hardness is 2H, the acomia color phenomenon in surface, and the pin hole phenomenon that coatingsurface is more, anti-cupric ion quickens salt-fog test 70h.
Embodiment 6
Take by weighing 140g teos solution, 110g deionized water and 100g absolute ethyl alcohol, pour beaker into, magnetic agitation 20min.Regulate pH value to 5 with concentrated hydrochloric acid, continue to stir 3h and make its hydrolysis; Take by weighing the mixture of 100g, put into the thermostat water bath heated and stirred, 50g γ-An Bingjisanyiyangjiguiwan, 20g deionized water, 25g Virahol, 5g flow agent are poured into wherein successively again, condensation reaction is hydrolyzed; Utilize the mixture of above-mentioned preparation, adopt dip-coating method technology, prepare a skim in aluminum alloy surface with the pull rate of 5mm/s.After normal temperature is placed 10min, under 200 ℃ constant temperature, solidify 30min, promptly obtain described flexible coating.
Prepared coating does not ftracture in 90 ° bending test, and hardness is 3H, the acomia color phenomenon in surface, and coatingsurface has few pin hole phenomenon, and anti-cupric ion quickens salt-fog test 100h.
Embodiment 7
Take by weighing 100g methyl silicate solution, 130g deionized water and 120g absolute ethyl alcohol, pour beaker into, magnetic agitation 20min.Regulate pH value to 5 with concentrated hydrochloric acid, continue to stir 3h and make its hydrolysis; Take by weighing the mixture of 100g, put into the thermostat water bath heated and stirred, 50g γ-An Bingjisanyiyangjiguiwan, 20g deionized water, 25g propylene glycol monomethyl ether, 5g flow agent are poured into wherein successively again, condensation reaction is hydrolyzed; Utilize the mixture of above-mentioned preparation, adopt dip-coating method technology, prepare a skim in aluminum alloy surface with the pull rate of 5mm/s.After normal temperature is placed 10min, under 200 ℃ constant temperature, solidify 30min, promptly obtain described flexible coating.
Prepared coating does not ftracture in 90 ° bending test, and hardness is 3H, the acomia color phenomenon in surface, and coatingsurface has few pin hole phenomenon, and anti-cupric ion quickens salt-fog test 70h.
Embodiment 8
Take by weighing 100g methyl silicate solution, 130g deionized water and 120g absolute ethyl alcohol, pour beaker into, magnetic agitation 20min.Regulate pH value to 5 with concentrated hydrochloric acid, continue to stir 3h and make its hydrolysis; Take by weighing the mixture of 100g, put into the thermostat water bath heated and stirred, again 30g is gathered Union carbide A-162,30g deionized water, 35g butyl ester, 5g flow agent and pour into successively wherein, condensation reaction is hydrolyzed; Utilize the mixture of above-mentioned preparation, adopt spraying coating process, prepare a skim in aluminum alloy surface.After normal temperature is placed 10min, under 200 ℃ constant temperature, solidify 30min, promptly obtain described flexible coating.
Prepared coating does not ftracture in 90 ° bending test, and hardness is 3H, the acomia color phenomenon in surface, and coatingsurface has more pin hole phenomenon, and anti-cupric ion quickens salt-fog test 80h.
Embodiment 9
Take by weighing 140g teos solution, 110g deionized water and 100g absolute ethyl alcohol, pour beaker into, magnetic agitation 20min.Regulate pH value to 5 with concentrated hydrochloric acid, continue to stir 3h and make its hydrolysis; Take by weighing the mixture of 100g, put into the thermostat water bath heated and stirred, again 50g is gathered Union carbide A-162,20g deionized water, 25g Virahol, 5g flow agent and pour into successively wherein, condensation reaction is hydrolyzed; Utilize the mixture of above-mentioned preparation, adopt dip-coating method technology, prepare a skim in aluminum alloy surface with the pull rate of 5mm/s.After normal temperature is placed 10min, under 200 ℃ constant temperature, solidify 30min, promptly obtain described flexible coating.
Prepared coating does not ftracture in 90 ° bending test, and hardness is 3H, the acomia color phenomenon in surface, and coatingsurface has few pin hole phenomenon, and anti-cupric ion quickens salt-fog test 100h.
Comprehensive the foregoing description, over-all propertieies such as the snappiness of embodiment 9, apparent effect and corrosion resistance nature are optimum.
Scope of the present invention does not receive the restriction of said specific embodiments, and said embodiment also comprises the method and the component of functional equivalent only as the single example of illustrating all respects of the present invention in the scope of the invention.In fact, except content as herein described, those skilled in the art can easily grasp multiple improvement of the present invention with reference to the description of preceding text.Said improvement also falls within the scope of appended claims.
Claims (12)
1. a flexible coating that is used for duraluminum is characterized in that, comprises silicate compound and silicone resin, and wherein, the mass percent that said silicate compound accounts for total system is 10-20%, and the mass percent that said silicone resin accounts for total system is 15-25%.
2. one kind prepares the preparation method who is used for the flexible coating of duraluminum as claimed in claim 1, it is characterized in that, comprises the steps:
(1) take by weighing a certain amount of silicate compound solution, deionized water and absolute ethyl alcohol, pour beaker into, magnetic agitation 20min regulates pH value with concentrated hydrochloric acid, continues to stir 3h and makes its abundant hydrolysis;
(2) take by weighing the mixture that 100g step (1) prepares, put into the thermostat water bath heated and stirred, more load weighted silicone resin, deionized water, solvent and flow agent are poured into wherein successively, condensation reaction is hydrolyzed;
(3) said mixture that utilizes step (2) to obtain prepares a skim in aluminum alloy surface, after normal temperature dries 10min, under 200 ℃ constant temperature, solidifies 30min, promptly obtains described flexible coating.
3. the preparation method who is used for the flexible coating of duraluminum according to claim 2 is characterized in that, said silicate compound comprises a kind of in methyl silicate and the tetraethoxy or both proportioning things.
4. the preparation method who is used for the flexible coating of duraluminum according to claim 2; It is characterized in that said silicone resin comprises Y-aminopropyl triethoxysilane, methyltrimethoxy silane, Y-(methacryloxypropyl) propyl trimethoxy silicane and gathers one or more the proportioning thing in the Union carbide A-162.
5. the preparation method who is used for the flexible coating of duraluminum according to claim 2 is characterized in that, the quality of said step (1) mesosilicic acid compound solution, deionized water and absolute ethyl alcohol is respectively 70-140g, 110-150g and 100-130g.
6. the preparation method who is used for the flexible coating of duraluminum according to claim 2 is characterized in that, pH value is 5-6 in the said step (1).
7. the preparation method who is used for the flexible coating of duraluminum according to claim 2 is characterized in that, the solvent in the said step (2) is one or more in Virahol, ethanol, butyl ester, butanone and the propylene glycol monomethyl ether.
8. the preparation method who is used for the flexible coating of duraluminum according to claim 2 is characterized in that, the quality of silicone resin, deionized water, solvent and flow agent is respectively 30-50g, 20-30g, 25-35g and 5g in the said step (2).
9. the preparation method who is used for the flexible coating of duraluminum according to claim 2 is characterized in that, the method for preparing film in the said step (3) comprises dip-coating method, spin-coating method and spraying method.
10. the preparation method who is used for the flexible coating of duraluminum according to claim 9 is characterized in that, said step (3) adopts dip-coating method, prepares a skim with the pull rate of 5mm/s in aluminum alloy surface.
11. the preparation method who is used for the flexible coating of duraluminum according to claim 9 is characterized in that, said step (3) adopts spin-coating method at the aluminium alloy plate surface coatings, and spin speed is 800r/min, and the time is 60s.
12. the preparation method who is used for the flexible coating of duraluminum according to claim 9 is characterized in that, said step (3) adopts spraying method, prepares a skim in aluminum alloy surface.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106349787A (en) * | 2016-08-29 | 2017-01-25 | 常熟市古里镇淼泉大光金属制品厂 | Warehousing shelf for supermarkets |
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| CN101020750A (en) * | 2007-03-16 | 2007-08-22 | 西北工业大学 | Silicone antifoulant and its prepn |
| CN101037567A (en) * | 2007-04-10 | 2007-09-19 | 浙江大学 | Composite silicon coating and its preparing method |
| CN101429355A (en) * | 2007-11-08 | 2009-05-13 | 深圳大学 | Process for preparing nano-organosilicon composite coating |
| CN101805531A (en) * | 2010-02-23 | 2010-08-18 | 浙江大学 | Preparation method of organic-inorganic composite collosol for the surface corrosion prevention of metal aluminum sheet |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101020750A (en) * | 2007-03-16 | 2007-08-22 | 西北工业大学 | Silicone antifoulant and its prepn |
| CN101037567A (en) * | 2007-04-10 | 2007-09-19 | 浙江大学 | Composite silicon coating and its preparing method |
| CN101429355A (en) * | 2007-11-08 | 2009-05-13 | 深圳大学 | Process for preparing nano-organosilicon composite coating |
| CN101805531A (en) * | 2010-02-23 | 2010-08-18 | 浙江大学 | Preparation method of organic-inorganic composite collosol for the surface corrosion prevention of metal aluminum sheet |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106349787A (en) * | 2016-08-29 | 2017-01-25 | 常熟市古里镇淼泉大光金属制品厂 | Warehousing shelf for supermarkets |
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