CN101392384A - Surface treatment agent of waste and old easy open can surface - Google Patents
Surface treatment agent of waste and old easy open can surface Download PDFInfo
- Publication number
- CN101392384A CN101392384A CNA2008101525590A CN200810152559A CN101392384A CN 101392384 A CN101392384 A CN 101392384A CN A2008101525590 A CNA2008101525590 A CN A2008101525590A CN 200810152559 A CN200810152559 A CN 200810152559A CN 101392384 A CN101392384 A CN 101392384A
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- CN
- China
- Prior art keywords
- trifluoroacetic acid
- methylene dichloride
- waste
- pop
- treatment agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention discloses a surface conditioning agent used for synchronously removing a stoving varnish coating on the surface as well as an anti-corrosion film on the internal wall of a pop can. The surface conditioning agent is composed of methylene dichloride, trifluoroacetic acid and water. The preparation method of the surface conditioning agent includes that water solution of trifluoroacetic acid with a preset portion is put into a container with the methylene dichloride available. By applying the film release agent to the film release of the pop can, a paint coating on the external wall of the pop can bubble after 2min to 5min and can completely strip after 10min while the stripping of the film on the internal wall takes 5min. Additionally, the surface conditioning agent is reusable for several times.
Description
Technical field
The present invention discloses and a kind ofly can handle pop can surface baking vanish coating and inner wall anti-corrosive membrane agent and collocation method simultaneously.
Technical background
To 1,800 hundred million of the annual consumption in last century Mo whole world pop cans, consumption aluminium accounts for about 15% of world aluminum consumption up to more than 250 ten thousand tons.The reclaiming utilization of pop can both can be saved bauxite, also can save 97% the energy.Waste and old aluminum easy open can be made again high-quality aluminum or aluminum alloy material, must be carried out strict pre-treatment.
Except dirt, mainly be processing to tank surface enamelled coating and inwall film with removing surfaces such as washing composition.Treatment process and paint removal and stripping rate directly have influence on the cost of the quality of the aluminum or aluminum alloy material of making and utilization and environmental pollution etc.Paint removal is the core technology that waste and old aluminum easy open can is recycled, and therefore advantages such as it makes the regeneration of waste and old easy open can have the productivity height, energy consumption is low, scaling loss is little, the easy control of finished product alloying constituent have obtained to pay attention to widely.
But in order to protect pop can to exempt corrosion effectively, increase its aesthetic feeling simultaneously, the electrostatic painting processing is carried out on the pop can surface usually, and this coating adhesion is strong, and is incrust.Directly contact with beverage for fear of aluminium in addition, reduce the content of aluminium in the beverage, prevent that simultaneously aluminium from producing galvanic corrosion, its inwall utilizes water-based modification epoxy pop can inner-wall paint to form a skim, the anti-strong acid of inwall film, highly basic and most of organic solvent.But just because these characteristics, make in the metal vessel recycling process, electrostatic spraying powder, baking vanish coating and metal vessel inner wall anti-corrosive film are removed becomes stubborn problem the most, if deal with improperly, these will become the impurity in the metal recovery, reduce the purity of metal greatly, can cause pollution simultaneously environment.
Paint removal technology in the metal current removal process roughly has following several: (1) sandblast paint removal: use the sand papering paint removal.Advantage: paint removal rate height, pollute few; Shortcoming: the unlined aluminium loss is big, is not suitable for scale operation.(2) vitriol oil paint removal: utilize the characteristic of vitriol oil passivation to remove the enamelled coating on aluminium pot surface.Advantage: cost is low, paint removal rate height, and the aluminium recovery height, impure few, paint removal speed is fast.Shortcoming: complex process.(3) organic solvent paint removal:, adopt organic solution dissolving organic varnish according to " similar mixing " principle between organism.Advantage: paint removal rate height, the aluminium recovery height is impure few; Shortcoming: the paint removal rate is influenced obviously by solvent strength.(4) hot paint removal method: in High Temperature Furnaces Heating Apparatus, heat.Advantage: method is simple, good manufacturability; Shortcoming: seriously polluted, foreign matter content height, cost height, energy consumption height.
Patent CN 93107391.X has invented the use ethylene dichloride, phenol, paraffin, sodium acetate, acetate, oxalic acid and alkenyl succinic acid plural components demoulding; Patent CN89105154.6 has invented use N-BUTYL ACETATE, formic acid, cresols, phenol, acetone, cyclohexanone plural components demoulding.Above method needs drug variety too much, and removal that can only be simple surface baking vanish coating, and can not remove the inwall film.
Summary of the invention
Purpose of the present invention according to the deficiency of above-mentioned paint removal and stripping technology, provides a kind of agent that can handle pop can surface baking vanish coating and inner wall anti-corrosive film simultaneously, this remover paint removal membrane removal speed is fast, thoroughly, not influenced by solvent strength, and a kind of dose and the collocation method that can be repeatedly used.
Provided by the present invention dose, form by methylene dichloride, trifluoroacetic acid, water, it is characterized by each component of forming this agent, it is as follows to calculate share by volume:
(1) methylene dichloride 40-80
(2) trifluoroacetic acid 10-40
(3) water 10-20
Trifluoroacetic acid has the performance of the sticking power that reduces rete and metal substrate; Methylene dichloride then makes its rete expand, and breaks away from metal substrate, helps to accelerate trifluoroacetic acid and infiltrates between rete and the metal substrate; Water mixes with trifluoroacetic acid, and forms suspension in methylene dichloride, can effectively suppress the trifluoroacetic acid volatilization.
A kind of collocation method that can handle pop can surface baking vanish coating and inner wall anti-corrosive membrane agent simultaneously provided by the present invention comprises following step:
(1) trifluoroacetic acid of predetermined fraction is soluble in water, make trifluoroacetic acid aqueous solution,
(2) trifluoroacetic acid aqueous solution is inserted in the container of splendid attire methylene dichloride and stir.
Utilize this treatment agent, pop can is carried out depainting handle the experiment discovery, impregnated enamelled coating bubbled in the time of 3～5 minutes, all came off in about 10 minutes, and inwall will all come off in thin film dipped about 5 minutes.Described dose the mechanism of action is mainly utilized the deep-etching ability of trifluoroacetic acid, destroys the cohesive force of tackiness agent between enamelled coating and lacquer, film and tank body, by the methylene dichloride hypertonicity, adds lacquer, film and tank body gap, and then comes off again.Described pop can surface treatment agent repeating utilization factor is higher, and is less to the consumption of solvent, greatly reduces processing cost.
Embodiment
Below by most preferred embodiment, further describe its inventive features.
Embodiment one:
Each component of agent, it is as follows to calculate share by volume:
(1) methylene dichloride 40
(2) trifluoroacetic acid 40
(3) water 20
Embodiment two:
Each component of agent, it is as follows to calculate share by volume:
(1) methylene dichloride 60
(2) trifluoroacetic acid 25
(3) water 15
Embodiment three:
Each component of agent, it is as follows to calculate share by volume:
(1) methylene dichloride 80
(2) trifluoroacetic acid 10
(3) water 10
Each component raw material in the treatment agent of the present invention, its purity are the technical pure level.
Claims (3)
1, a kind of surface treatment agent of waste and old easy open can surface is characterized by by methylene dichloride, trifluoroacetic acid, water and forms, and forms each component of this agent, and it is as follows to calculate share by volume:
(1) methylene dichloride 40～80
(2) trifluoroacetic acid 10～40
(3) water 10～20.
2. one kind according to claim 1 surface treatment agent of waste and old easy open can surface, it is characterized by to remove pop can surface baking vanish coating, can remove the anticorrosion film of container inner wall again.
3. preparation method according to claim 1 or 2 surface treatment agent of waste and old easy open can surface may further comprise the steps:
(1) trifluoroacetic acid of predetermined fraction is soluble in water, make trifluoroacetic acid aqueous solution,
(2) trifluoroacetic acid aqueous solution is inserted in the container of splendid attire methylene dichloride and stir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101525590A CN101392384B (en) | 2008-10-30 | 2008-10-30 | Surface treatment agent of waste and old easy open can surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101525590A CN101392384B (en) | 2008-10-30 | 2008-10-30 | Surface treatment agent of waste and old easy open can surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101392384A true CN101392384A (en) | 2009-03-25 |
| CN101392384B CN101392384B (en) | 2010-07-14 |
Family
ID=40492889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101525590A Expired - Fee Related CN101392384B (en) | 2008-10-30 | 2008-10-30 | Surface treatment agent of waste and old easy open can surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101392384B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747375A (en) * | 2012-06-15 | 2012-10-24 | 兰州理工大学 | Paint remover for internal and external surface paint films of aluminum pop can and use method |
| CN102977672A (en) * | 2012-09-29 | 2013-03-20 | 吴雅萍 | Aluminum alloy surface treatment agent |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087073A (en) * | 2011-02-25 | 2011-06-08 | 丰城市环球资源再生科技发展有限公司 | De-painting kiln for pop can |
-
2008
- 2008-10-30 CN CN2008101525590A patent/CN101392384B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747375A (en) * | 2012-06-15 | 2012-10-24 | 兰州理工大学 | Paint remover for internal and external surface paint films of aluminum pop can and use method |
| CN102977672A (en) * | 2012-09-29 | 2013-03-20 | 吴雅萍 | Aluminum alloy surface treatment agent |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101392384B (en) | 2010-07-14 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100714 Termination date: 20141030 |
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| EXPY | Termination of patent right or utility model |