CN102690551A - Paint remover for removing paint film on surface of tin-plated steel plate for food can and using method thereof - Google Patents
Paint remover for removing paint film on surface of tin-plated steel plate for food can and using method thereof Download PDFInfo
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- CN102690551A CN102690551A CN2012101997352A CN201210199735A CN102690551A CN 102690551 A CN102690551 A CN 102690551A CN 2012101997352 A CN2012101997352 A CN 2012101997352A CN 201210199735 A CN201210199735 A CN 201210199735A CN 102690551 A CN102690551 A CN 102690551A
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Abstract
The invention relates to a paint remover for removing a paint film on the surface of a tin-plated steel plate for a food can and a using method thereof, wherein the paint remover is prepared from the following raw materials in percentage by weight: 25-35% of dibasic acid ester, 20-35% of 1, 2-propylene glycol carbonate, 8-15% of absolute ethyl alcohol, 16-25% of lactic acid and 2.5-6% of cetyl trimethyl ammonium bromide. The paint remover is prepared by a method comprising the following steps: firstly, burdening the raw materials of the paint remover according to the content thereof; adding the raw materials according to the sequence from solid to liquid respectively, then stirring for 5-15 minutes at room temperature, and sealing and reserving after mixing uniformly. The using method of the prepared paint remover for removing the paint film on the surface of the tin-plated steel plate for the food can comprises the following step of: immersing objects for removing the paint completely in the paint remover, wherein the using temperature of the paint remover is 25-80 DEG C, the best using temperature is 60-80 DEG C, and the immersing time is 1-15 minutes. The paint remover for removing the paint film on the surface of the tin-plated steel plate for the food can and the using method thereof provided by the invention have the characteristics of good environment-friendly performance, stable solvent components, paint removing efficiency and tiny metal corrosion performance.
Description
Technical field
The invention belongs to the paint remover technical field, be specifically related to a kind of paint remover and method of use thereof of removing food cans with tin plate surface paint film.
Background technology
Tin plate is meant that the two sides is coated with the cold rolling Low Carbon Steel of commercially pure tin, because of it has characteristics such as corrosion-resistant, nontoxic, that intensity is high, ductility is good, is widely used in the food product pack industry at present.Tin plate need experience processes such as a series of printing, moulding and just can come into operation, and the coating process of food cans mainly comprises: interior coating, end oil, whitewash, metal ink and coating varnish.Owing to get rusty, reasons such as colour cast, register trouble, trace underdry, firmness difference and ink performance instability, annual all can have the useless tin plate of a large amount of seals to produce.In addition, along with the tinned food demand increases day by day, the discarded amount of tin plate also is the trend that rises year by year.If food cans is carried out recycling, both can practice thrift former iron ore, the energy consumption in the time of reducing the processing tin plate again, the double benefit of realization economy and environmental protection.
Useless tin plate is a raw material of smelting tin-containing free cutting steel; Need remove the old paint film on its surface before recycling; Otherwise the paint film polymkeric substance can decompose multiple hazardous and noxious substances such as producing halohydrocarbon, aromatic hydrocarbons in the high-temperature smelting process, thus contaminate environment and harm operator ' s health.Stripping method commonly used has two kinds of physics method and chemical methods.The physics method generally is divided into flame method, strikes shovel method, blast method and knife scraping method etc.The physics method mainly relies on artificial the expansion, and former base material is had certain destruction, is prone to cause uneven, the distortion of substrate surface.This method is inapplicable for some precision instrument, exists dead angle, the special parts paint film of geometrical shape to be difficult to remove fully for some.Chemical method mainly is to utilize paint remover that the paint film polymkeric substance is produced dissolving or swelling action; Promptly destroy the space structure of paint film polymkeric substance and the bonding force between paint film and base material: on the one hand, utilize the paint remover solvent molecule to be penetrated into and make its dissolving in the polymer molecule segment; On the other hand, the internal stress that produces when the polymer molecule volume increases can be destroyed the bounding force between paint film and base material, and paint film is eliminated thus.
Paint remover commonly used is divided into inorganic and organic two big types.
Inorganic paint remover composition is simple, cheap and preparation is convenient, but contains more mineral acid or alkali, and is big to metal base corrodibility, and the tin layer of failure surface influences the application again and the second stage employ of tin plate.
Organic paint remover is the liquid that is mixed by hydrochloric ether, benzene series thing, ester, alcohol, ether equal solvent.Advantages such as organic paint remover is easy to use because of it, depainting efficient is high, good stability and metal protection are little have become the main flow paint remover on the market at present.The tradition organic paint remover often with hydrochloric ether, benzene series thing equal solvent as staple.Like " paint remover that is used for polyester, polyester-imide enamelling cuprum round line paint film " (CN 1590474A) patented technology, by massfraction be: 30 ~ 50% formic acid, 30 ~ 40% trichloromethanes, 5 ~ 35% cresolss, 0 ~ 5% additive are formed." a kind of powerful paint stripper " (CN 101629036A) patented technology is that 0 ~ 5% tensio-active agent, 72 ~ 78% methylene dichloride, 0 ~ 3% ETHYLE ACETATE, 0.78 ~ 0.8% thickening material, 0.6 ~ 0.7% paraffin, 4.85 ~ 10% phenol, 5 ~ 9% ethanol, 0 ~ 6% formic acid, 0 ~ 6% ammoniacal liquor, 0 ~ 1% Sodium Nitrite are formed by massfraction.Though thoroughly with applied widely, the environmental-protecting performance of solvent for use is relatively poor, high volatility, inflammable and poisonous, for construction site and operator certain harm is arranged for this type paint remover depainting.
Summary of the invention
The present invention is intended to overcome the prior art defective, and the removal food cans that purpose provides that a kind of good environmental protection, solvent composition are stable, depainting efficient height and metal protection are little is with the paint remover and the method for use thereof of the surperficial paint film of tin plate; This paint remover is used to remove food cans with tin plate surface whitewash, metal ink and coating varnish paint film.
For realizing above-mentioned purpose, paint remover raw material provided by the invention and content thereof are:
The preparation method of said paint remover is: prepare burden by the raw material and the content thereof of said paint remover earlier, raw material is added respectively by the order of solid to liquid again, stirred at ambient temperature then 5 ~ 15 minutes, mix the back and seal subsequent use.
Said dibasic acid esters is more than one in methyl-succinate, Methyl glutarate, the dimethyl adipate.
The removal food cans of the present invention's preparation with the method for use of the paint remover of tin plate surface paint film is: the object that will treat depainting is fully immersed in this paint remover; The use temperature of this paint remover is 25 ~ 80 ° of C; Best use temperature is 60 ~ 80 ° of C, and soak time is 1 ~ 15 minute.
The said object of treating depainting is the paint film of food cans with tin plate surface whitewash, metal ink and coating varnish.
Owing to adopt technique scheme, the paint remover of the present invention's preparation is depainting at normal temperatures, also can be at depainting under the heating condition.Be particluarly suitable for depainting under the heating condition, promptly preferred heating condition is 60 ~ 80 ° of C.The paint remover of the present invention's preparation spreads upon in use and treats the depainting article surface, maybe will treat that the depainting object directly is soaked in the paint remover, will treat that preferably the depainting object directly is soaked in the paint remover.
The paint remover of the present invention's preparation can make solvent molecule ability rapid osmotic in paint film, plays dissolving and swollen effect.Be suitable for removing epoxy resin, Synolac, urethane, propenoate and varnish, be particularly useful for removing the paint film of surperficial whitewash, metal ink and coating varnish of tin plate.
Compared with present technology the present invention has following beneficial effect:
1. paint remover provided by the invention does not contain hypertoxicity compound and intense stimulus property steam, and good environmental protection is harmless to environment and operator.
2. paint remover provided by the invention is a staple with the low-volatile ester compound of low toxicity, and the dissolution with solvents performance is good, and infiltration rate is fast, and depainting efficient is high.
3. paint remover provided by the invention does not contain strong acid or strong basicity promotor, and character is gentle, and corrodibility is little, does not destroy the tin layer on tin plate surface behind the depainting.
4. paint remover volatility provided by the invention is low, and modest viscosity is not added any volatilizer and thickening material of pressing down, and paint film is easy to wash and peels off behind the depainting, and substrate surface does not have residual paint film, and tin plate can directly carry out secondary application and utilization.
5. paint remover boiling point provided by the invention is higher, can heat and use and repeatedly use, and still can keep higher depainting efficient after repeatedly using.
Therefore, the present invention have that good environmental protection, solvent composition are stable, depainting efficient height and the little characteristics of metal protection.
Embodiment
Below in conjunction with embodiment the present invention being further described, is not the restriction to its protection domain.
This embodiment is described treats that the object of depainting is the paint film of food cans with tin plate surface whitewash, metal ink and coating varnish, repeats no more in following examples.
Embodiment 1
A kind of paint remover and method of use thereof of removing food cans with tin plate surface paint film.The raw material and the content thereof of this paint remover are: methyl-succinate is 25 ~ 28wt%, 1, and 2-Ucar 35 carbonic ether is that 32 ~ 35wt%, absolute ethyl alcohol are that 14 ~ 15w%, lactic acid are that 18 ~ 20wt% and cetyl trimethylammonium bromide are 3 ~ 5wt%.
The described removal food cans of present embodiment with the preparation method of the paint remover of tin plate surface paint film is: prepare burden by the raw material and the content thereof of said paint remover earlier; Again raw material is added respectively by the order of solid to liquid; Stirred at ambient temperature then 5 ~ 15 minutes, and mixed the back and seal subsequent use.
The prepared removal food cans of present embodiment with the paint remover method of use of tin plate surface paint film is: the object that will treat depainting is fully immersed in this paint remover; The use temperature of this paint remover is 25 ~ 80 ° of C; Best use temperature is 60 ~ 80 ° of C, and soak time is 1 ~ 15 minute.
Embodiment 2
A kind of paint remover and method of use thereof of removing food cans with tin plate surface paint film.The raw material and the content thereof of this paint remover are: Methyl glutarate is 28 ~ 30wt%, 1, and 2-Ucar 35 carbonic ether is that 30 ~ 32wt%, absolute ethyl alcohol are that 10 ~ 12wt%, lactic acid are that 24 ~ 25wt% and cetyl trimethylammonium bromide are 2.5 ~ 3wt%.
The preparation method of the said paint remover of present embodiment and with the removal food cans of this method preparation with the method for use of the paint remover of the surperficial paint film of tin plate all with embodiment 1.
Embodiment 3
A kind of paint remover and method of use thereof of removing food cans with tin plate surface paint film.The raw material and the content thereof of this paint remover are: dimethyl adipate is 30 ~ 33wt%, 1, and 2-Ucar 35 carbonic ether is that 25 ~ 28wt%, absolute ethyl alcohol are that 12 ~ 13wt%, lactic acid are that 23 ~ 24wt% and cetyl trimethylammonium bromide are 4 ~ 5wt%.
The preparation method of the said paint remover of present embodiment and with the removal food cans of this method preparation with the method for use of the paint remover of the surperficial paint film of tin plate all with embodiment 1.
Embodiment 4
A kind of paint remover and method of use thereof of removing food cans with tin plate surface paint film.The raw material and the content thereof of this paint remover are: methyl-succinate is that 16 ~ 17.5wt%, Methyl glutarate are 16 ~ 17.5wt%, 1, and 2-Ucar 35 carbonic ether is that 28 ~ 32wt%, absolute ethyl alcohol are that 8 ~ 13wt%, lactic acid are that 16 ~ 19wt% and cetyl trimethylammonium bromide are 5 ~ 6wt%.
The preparation method of the said paint remover of present embodiment and with the removal food cans of this method preparation with the method for use of the paint remover of the surperficial paint film of tin plate all with embodiment 1.
Embodiment 5
A kind of paint remover and method of use thereof of removing food cans with tin plate surface paint film.The raw material and the content thereof of this paint remover are: methyl-succinate is that 16 ~ 17.5wt%, dimethyl adipate are 16 ~ 17.5wt%, 1, and 2-Ucar 35 carbonic ether is that 28 ~ 32wt%, absolute ethyl alcohol are that 8 ~ 13wt%, lactic acid are that 16 ~ 19wt% and cetyl trimethylammonium bromide are 5 ~ 6wt%.
The preparation method of the said paint remover of present embodiment and with the removal food cans of this method preparation with the method for use of the paint remover of the surperficial paint film of tin plate all with embodiment 1.
Embodiment 6
A kind of paint remover and method of use thereof of removing food cans with tin plate surface paint film.The raw material and the content thereof of this paint remover are: methyl-succinate is that 9 ~ 10wt%, Methyl glutarate are that 9 ~ 10wt%, dimethyl adipate are 14 ~ 15wt%, 1, and 2-Ucar 35 carbonic ether is that 20 ~ 25wt%, absolute ethyl alcohol are that 13 ~ 15wt%, lactic acid are that 20 ~ 22wt% and cetyl trimethylammonium bromide are 5 ~ 6wt%.
The preparation method of the said paint remover of present embodiment and with the removal food cans of this method preparation with the method for use of the paint remover of the surperficial paint film of tin plate all with embodiment 1.
The paint remover of this embodiment preparation will be treated in use that the depainting object directly is soaked in the paint remover or spreads upon and treat the depainting article surface; Equal ability effective elimination tin plate surface paint film under normal temperature and heating condition; Depainting at normal temperatures; Also can be particluarly suitable for depainting under the heating condition at depainting under the heating condition, the preferential heating condition of selecting is 60 ~ 80 ° of C.Specifically; The use temperature of paint remover is 25 ~ 80 ° of C; Under heating condition; Be under 60 ~ 80 ° of C conditions in use temperature promptly, the depainting efficient of prepared paint remover is better, can more effectively control the soak time (seeing table 1) of galvanized sheet and can more effectively control the surface corrosion degree (see table 2) of paint remover to tin plate.
Table 1
Table 1 is the result show, embodiment 1 ~ 6 depainting efficient under 60 ~ 80 ° of C conditions is suitable, and three kinds of paint films can be removed in 1 ~ 15 minute fully.
Table 2
Table 2 is the determination of corrosion result.This result is at ambient temperature, with the tin plate (2 * 2cm that treats depainting
2) be immersed in each prepared paint remover of present embodiment 1 ~ 6 72 hours respectively, the weightlessness of measuring this tin plate with analytical balance then with calculate its erosion rate.Determination of corrosion is the result show, this tin plate surface tin layer of embodiment 1 ~ 6 degree of being damaged is all lower, does not influence secondary application and utilization.
The paint remover that this embodiment provides can make solvent molecule ability rapid osmotic in paint film, plays dissolving and swollen effect.Be suitable for removing epoxy resin, Synolac, urethane, propenoate and varnish, be particularly useful for removing whitewash, metal ink and the coating varnish paint film on tin plate surface.
Compared with present technology this embodiment has following beneficial effect:
1. the paint remover of this embodiment preparation does not contain hypertoxicity compound and intense stimulus property steam, and good environmental protection is harmless to environment and operator.
2. as staple, the dissolution with solvents performance is good with the low-volatile ester compound of low toxicity for the paint remover of this embodiment preparation, and infiltration rate is fast, and depainting efficient is high.
3. the paint remover of this embodiment preparation does not contain strong acid or strong basicity promotor, and character is gentle, and corrodibility is little, does not destroy the tin layer on tin plate surface behind the depainting.
4. the paint remover volatility of this embodiment preparation is low, and modest viscosity is not added any volatilizer and thickening material of pressing down, and paint film is easy to wash and peels off behind the depainting, and substrate surface does not have residual oil film, and tin plate can directly carry out secondary application and utilization.
5. the paint remover boiling point that provides of this embodiment is higher, can heat use, and still can keep higher depainting efficient after repeatedly using.
Therefore, this embodiment have that good environmental protection, solvent composition are stable, depainting efficient height and the little characteristics of metal protection.
Claims (4)
1. paint remover of removing food cans with tin plate surface paint film is characterized in that the raw material of said paint remover and content thereof are:
Dibasic acid esters 25 ~ 35wt%;
1,2-Ucar 35 carbonic ether 20 ~ 35 wt %;
Absolute ethyl alcohol 8 ~ 15 wt %;
Lactic acid 16 ~ 25 wt %;
Cetyl trimethylammonium bromide 2.5 ~ 6 wt %;
The preparation method of said paint remover is: prepare burden by the raw material and the content thereof of said paint remover earlier, raw material is added respectively by the order of solid to liquid again, stirred at ambient temperature then 5 ~ 15 minutes, mix the back and seal subsequent use.
2. according to the paint remover of the said removal food cans of claim 1, it is characterized in that said dibasic acid esters is more than one in methyl-succinate, Methyl glutarate, the dimethyl adipate with tin plate surface paint film.
3. the said removal food cans of claim 1 is with the method for use of the paint remover of tin plate surface paint film; It is characterized in that the object that will treat depainting is fully immersed in the said paint remover; The use temperature of said paint remover is 25 ~ 80oC; Best use temperature is 60 ~ 80oC, and soak time is 1 ~ 15 minute.
4. like the method for use of the said removal food cans of claim 3, it is characterized in that saidly treating that the object of depainting is that food cans is with the surperficial whitewash of tin plate, metal ink and coating varnish paint film with the paint remover of tin plate surface paint film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101997352A CN102690551A (en) | 2012-06-18 | 2012-06-18 | Paint remover for removing paint film on surface of tin-plated steel plate for food can and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101997352A CN102690551A (en) | 2012-06-18 | 2012-06-18 | Paint remover for removing paint film on surface of tin-plated steel plate for food can and using method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN102690551A true CN102690551A (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101997352A Pending CN102690551A (en) | 2012-06-18 | 2012-06-18 | Paint remover for removing paint film on surface of tin-plated steel plate for food can and using method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104059425A (en) * | 2014-06-11 | 2014-09-24 | 怀化学院 | Paint remover as well as preparation method and using method thereof |
| WO2017140951A1 (en) * | 2016-02-18 | 2017-08-24 | Vauhti Speed Oy | Composition for cleaning skin strips of skin skis |
| CN111040506A (en) * | 2019-12-23 | 2020-04-21 | 三达奥克化学股份有限公司 | Water-based neutral paint remover |
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| CN1179169A (en) * | 1995-03-24 | 1998-04-15 | 罗纳·布朗克化学公司 | Cleaning and/or stripping copostion based on dibasic acid esters and ether as main components |
| US5932530A (en) * | 1994-04-11 | 1999-08-03 | E.Qu.I.P. International Inc. | N-methylpyrrolidone, dimethyl ester and terpene-containing, paint removing composition |
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2012
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| US5932530A (en) * | 1994-04-11 | 1999-08-03 | E.Qu.I.P. International Inc. | N-methylpyrrolidone, dimethyl ester and terpene-containing, paint removing composition |
| CN1179169A (en) * | 1995-03-24 | 1998-04-15 | 罗纳·布朗克化学公司 | Cleaning and/or stripping copostion based on dibasic acid esters and ether as main components |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104059425A (en) * | 2014-06-11 | 2014-09-24 | 怀化学院 | Paint remover as well as preparation method and using method thereof |
| WO2017140951A1 (en) * | 2016-02-18 | 2017-08-24 | Vauhti Speed Oy | Composition for cleaning skin strips of skin skis |
| US10711226B2 (en) | 2016-02-18 | 2020-07-14 | Vauhti Speed Oy | Composition for cleaning skin strips of skin skis |
| CN111040506A (en) * | 2019-12-23 | 2020-04-21 | 三达奥克化学股份有限公司 | Water-based neutral paint remover |
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Application publication date: 20120926 |