CN106433417A - Acid-resistant food tank inner wall coating - Google Patents
Acid-resistant food tank inner wall coating Download PDFInfo
- Publication number
- CN106433417A CN106433417A CN201610736076.XA CN201610736076A CN106433417A CN 106433417 A CN106433417 A CN 106433417A CN 201610736076 A CN201610736076 A CN 201610736076A CN 106433417 A CN106433417 A CN 106433417A
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- CN
- China
- Prior art keywords
- acid
- mixed solution
- coating
- wall paint
- solvent
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- 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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Classifications
-
- 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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/06—Unsaturated polyesters having carbon-to-carbon unsaturation
-
- 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
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention discloses an acid-resistant food tank inner wall coating. The acid-resistant food tank inner wall coating is prepared from modified polyester resin, 2-methyl methacrylate, rosin, zinc oxide powder, a filler, an additive and a solvent. Compared with an existing food tank inner wall coating, the food tank inner wall coating can greatly improve the storage stability of a food in a food tank, and a coating film is long in service life. Compared with a common food tank inner wall coating, the service life of the coating film is prolonged for 2-4 times. A paint coating formed after the acid-resistant food tank inner wall coating is applied is firm and tenacious, high in brightness, strong in adhesive power, strong in acid, sulfur and salt resistance properties and stable in performance, is not easily corroded and does not easily discolor. In addition, the inner wall coating is good in mechanical performance. The prepared coating has strong corrosion resistance after forming the film, and various technical indexes meet the food hygiene standards.
Description
Technical field
The present invention relates to metal packaging coating field, more particularly to a kind of have acid resistance food cans inner-wall paint.
Background technology
Especially beverage, flavoring agent, drinks etc. are larger to the corrosivity of its container for food, and food cans corrosion resistance is wanted
Ask higher.Therefore, one layer of acidproof, oil resistant, alkaline-resisting anticorrosive coating are coated to food top tank structure.The hygienic quality of coating is direct
Affect food consumption safety.Strict environmental requirement is had to comply with for the coating of food containers inwall；Existing use 6009
Epoxy resin, firming agent, titanium dioxide, the white food cans inner-wall paint of solvent invention, but find through experimental analysiss, which is acidproof,
The decay resistances such as sulfur resistive, salt tolerant are not still strong, have discoloration such as flavescence blackening etc..Simultaneously as the selection of each component of its coating,
The indexs such as its evaporation residual, free phenol, free formaldehyde cannot meet food safety.Therefore, how food cans inner-wall paint is improved
Acidproof, sulfur resistive, salt tolerant, and reach canned food requirement safety and sanitation, guarantee the quality, protect fresh, protect original flavor and need to overcome
One technical barrier.
Content of the invention
Above-mentioned in order to overcome the shortcomings of, the invention provides a kind of have acid resistance food cans inner-wall paint.
The present invention is achieved through the following technical solutions：
A kind of have acid resistance food cans inner-wall paint, is made up of following component by weight：Modified polyester resin 80,2- first
Base acrylic acid methyl ester. 25, Colophonium 5, oxide powder and zinc 5, filler 24, auxiliary agent 2, solvent 60,
Described filler is titanium dioxide；
Described auxiliary agent includes dispersant, levelling agent and defoamer, and wherein, dispersant, levelling agent, defoamer mass ratio:1:
0.4；
The fineness particle diameter of the oxide powder and zinc is 300-350 mesh；
The solvent is aromatic hydrocarbon solvent or alcohols solvent or two kinds of mixed in equal amounts in esters solvent.
Further, the preparation method of the modified polyester resin is：
1）Under room temperature, 1-2 Propylene Glycol and dodecylbenzene sodium sulfonate are pressed 4：1 mass ratio is added in water, and stirring and dissolving is obtained
To mixed solution A；1/3rd of mixed solution A volume are taken, then takes epoxy resin and maleic acid of the molecular weight in 2800-3200
Acid anhydride, three is mixed, and mixing quality ratio is followed successively by 6：10：1, after 200r/min rotating speed stirring 15min, mixed solution B is obtained,
Add the polyester resin of molecular weight 10000-12000 again, it is 12 that mixed solution adds mass ratio with polyester resin:85, with 450r/
Min rotating speed stirs 30min, obtains mixed solution C；
2）/ 5th of a maleic anhydride monomer quality sodium carbonate is added in mixed solution C, and solution temperature is risen to 68 DEG C,
After insulation 5min, the twentieth sodium peroxydisulfate of epoxy monomer quality is added, temperature is raised to 92 DEG C, with 250r/
Min rotating speed stirs 15min, is further continued for being incubated 10min, obtains mixed solution D；
3）Mixed solution D temperature is reduced to 85 DEG C, 1-2h is incubated, then 88 DEG C are warming up to, Deca maleic two in the 1h time
Anhydride, adjusts pH value of solution to 6.2-6.4, is incubated 1-2h, obtains modified polyester resin.After being modified to polyester resin, to system
Standby paint coatings adhesive force and pliability are greatly improved, and the degrading resistance property in the range of larger thickness is more excellent
Good, the most importantly greatly improve the acid resistance of food cans inner-wall paint film.
Further, the dispersant is sodium silicate.
Further, the defoamer is polydimethylsiloxane.
Further, the levelling agent is polyether polyester azo polyether polyeste.
Further, comprise the steps：Modified polyester resin and stirring solvent are heated to 100 DEG C, after being completely dissolved,
Then 62 DEG C are cooled to, after interpolation 2- methyl methacrylate, Colophonium, oxide powder and zinc, filler, auxiliary agent grinding 2-3h, grinding
Fineness is less than 5.5um, then stirs 15min with 1500r/min rotating speed, that is, obtain the acidic food can inner-wall paint.
The coating system of present invention resin based on modified polyester resin and 2- methyl methacrylate, coordinate Colophonium with
The synergism of oxide powder and zinc, its coating for being formed has excellent acidproof, sulfur resistive, salt resistant character, and coating is in baking process
Middle invariant color, it is not corroded in use.Meanwhile, also give coating good adhesion, improve hardness of film, pliability,
Resistance to marring.
The invention has the beneficial effects as follows：With existing food cans inner-wall paint ratio, food cans inner-wall paint of the present invention can be very big
Raising food cans in food storage stability, coating film life-span length, compared to the bread and cheese top tank structure coating film longevity
Life improves 2-4 times, and the enamelled coating for being formed after food cans inner-wall paint coating of the present invention is tough and tensile, brightness height, and adhesive force is strong, resistance to
Acid, sulfur resistive, salt resistant character are strong, stable performance, are difficult to be corroded, invariant color, in addition, the inside coating good mechanical property, this
Not only there is after the coating film forming of bright preparation stronger corrosion resistance, and all technical all meets food hygienic standard.
Specific embodiment
A kind of have acid resistance food cans inner-wall paint, is made up of following component by weight：Modified polyester resin 80,
2- methyl methacrylate 25, Colophonium 5, oxide powder and zinc 5, filler 24, auxiliary agent 2, solvent 60,
Described filler is titanium dioxide；
Described auxiliary agent includes dispersant, levelling agent and defoamer, and wherein, dispersant, levelling agent, defoamer mass ratio:1:
0.4；
The fineness particle diameter of the oxide powder and zinc is 300-350 mesh；
The solvent is aromatic hydrocarbon solvent or alcohols solvent or two kinds of mixed in equal amounts in esters solvent.
Further, the preparation method of the modified polyester resin is：
1）Under room temperature, 1-2 Propylene Glycol and dodecylbenzene sodium sulfonate are pressed 4：1 mass ratio is added in water, and stirring and dissolving is obtained
To mixed solution A；1/3rd of mixed solution A volume are taken, then takes epoxy resin and maleic acid of the molecular weight in 2800-3200
Acid anhydride, three is mixed, and mixing quality ratio is followed successively by 6：10：1, after 200r/min rotating speed stirring 15min, mixed solution B is obtained,
Add the polyester resin of molecular weight 10000-12000 again, it is 12 that mixed solution adds mass ratio with polyester resin:85, with 450r/
Min rotating speed stirs 30min, obtains mixed solution C；
2）/ 5th of a maleic anhydride monomer quality sodium carbonate is added in mixed solution C, and solution temperature is risen to 68 DEG C,
After insulation 5min, the twentieth sodium peroxydisulfate of epoxy monomer quality is added, temperature is raised to 92 DEG C, with 250r/
Min rotating speed stirs 15min, is further continued for being incubated 10min, obtains mixed solution D；
3）Mixed solution D temperature is reduced to 85 DEG C, 1-2h is incubated, then 88 DEG C are warming up to, Deca maleic two in the 1h time
Anhydride, adjusts pH value of solution to 6.2-6.4, is incubated 1-2h, obtains modified polyester resin.After being modified to polyester resin, to system
Standby paint coatings adhesive force and pliability are greatly improved, and the degrading resistance property in the range of larger thickness is more excellent
Good, the most importantly greatly improve the acid resistance of food cans inner-wall paint film.
Further, the dispersant is sodium silicate.
Further, the defoamer is polydimethylsiloxane.
Further, the levelling agent is polyether polyester azo polyether polyeste.
Further, comprise the steps：Modified polyester resin and stirring solvent are heated to 100 DEG C, after being completely dissolved,
Then 62 DEG C are cooled to, after interpolation 2- methyl methacrylate, Colophonium, oxide powder and zinc, filler, auxiliary agent grinding 2-3h, grinding
Fineness is less than 5.5um, then stirs 15min with 1500r/min rotating speed, that is, obtain the acidic food can inner-wall paint.
Food cans inner-wall paint performance test of the present invention：
| Coating of the present invention | |
| Appearance of film | Bright flat smooth |
| Drying time（68±2℃）min | ≤19 |
| Fineness μm | ≤5.5 |
| Impact strength kg, cm | 42 |
| Pliability mm | 1 |
| Adhesive force,（Draw a circle method）Level | 1 |
| Hardness（Double pendulum instrument） | 0.6 |
| Acid resistance（Flow back in 3.5% acetum 2h） | Film is without exception |
| Resistance to ag(e)ing（Ultra violet lamp 8h） | Film is without exception |
Table 1
As can be seen from Table 1, food cans inner-wall paint various aspects of performance of the present invention all comparative superiorities.
Claims (6)
1. a kind of have acid resistance food cans inner-wall paint, it is characterised in that is made up of following component by weight：Modified poly-
Ester resin 80,2- methyl methacrylate 25, Colophonium 5, oxide powder and zinc 5, filler 24, auxiliary agent 2, solvent 60,
Described filler is titanium dioxide；
Described auxiliary agent includes dispersant, levelling agent and defoamer, and wherein, dispersant, levelling agent, defoamer mass ratio:1:
0.4；
The fineness particle diameter of the oxide powder and zinc is 300-350 mesh；
The solvent is aromatic hydrocarbon solvent or alcohols solvent or two kinds of mixed in equal amounts in esters solvent.
2. according to claim 1 a kind of with acid resistance food cans inner-wall paint, it is characterised in that the modified poly ester
The preparation method of resin is：
1）Under room temperature, 1-2 Propylene Glycol and dodecylbenzene sodium sulfonate are pressed 4：1 mass ratio is added in water, and stirring and dissolving is obtained
To mixed solution A；1/3rd of mixed solution A volume are taken, then takes epoxy resin and maleic acid of the molecular weight in 2800-3200
Acid anhydride, three is mixed, and mixing quality ratio is followed successively by 6：10：1, after 200r/min rotating speed stirring 15min, mixed solution B is obtained,
Add the polyester resin of molecular weight 10000-12000 again, it is 12 that mixed solution adds mass ratio with polyester resin:85, with 450r/
Min rotating speed stirs 30min, obtains mixed solution C；
2）/ 5th of a maleic anhydride monomer quality sodium carbonate is added in mixed solution C, and solution temperature is risen to 68 DEG C,
After insulation 5min, the twentieth sodium peroxydisulfate of epoxy monomer quality is added, temperature is raised to 92 DEG C, with 250r/
Min rotating speed stirs 15min, is further continued for being incubated 10min, obtains mixed solution D；
3）Mixed solution D temperature is reduced to 85 DEG C, 1-2h is incubated, then 88 DEG C are warming up to, Deca maleic two in the 1h time
Anhydride, adjusts pH value of solution to 6.2-6.4, is incubated 1-2h, obtains modified polyester resin.
3. according to claim 1 a kind of have acid resistance food cans inner-wall paint, it is characterised in that the dispersant is
Sodium silicate.
4. according to claim 1 a kind of have acid resistance food cans inner-wall paint, it is characterised in that the defoamer is
Polydimethylsiloxane.
5. according to claim 1 a kind of have acid resistance food cans inner-wall paint, it is characterised in that the levelling agent is
Polyether polyester azo polyether polyeste.
6. a kind of preparation method of acidic food can inner-wall paint as claimed in claim 1, it is characterised in that walk including following
Suddenly：Modified polyester resin and stirring solvent are heated to 100 DEG C, after being completely dissolved, 62 DEG C are then cooled to, add 2- methyl-prop
After e pioic acid methyl ester, Colophonium, oxide powder and zinc, filler, auxiliary agent grinding 2-3h, the fineness of grinding is less than 5.5um, then with 1500r/min
Rotating speed stirs 15min, that is, obtain the acidic food can inner-wall paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610736076.XA CN106433417A (en) | 2016-08-26 | 2016-08-26 | Acid-resistant food tank inner wall coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610736076.XA CN106433417A (en) | 2016-08-26 | 2016-08-26 | Acid-resistant food tank inner wall coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106433417A true CN106433417A (en) | 2017-02-22 |
Family
ID=58182172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610736076.XA Pending CN106433417A (en) | 2016-08-26 | 2016-08-26 | Acid-resistant food tank inner wall coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106433417A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112266684A (en) * | 2020-09-30 | 2021-01-26 | 苏州市三新材料科技股份有限公司 | High-sulfur-resistance protein coating for beverage cans and preparation method thereof |
| WO2023086919A1 (en) * | 2021-11-12 | 2023-05-19 | Swimc Llc | Coating system for containers |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03146574A (en) * | 1989-11-01 | 1991-06-21 | Sakuranomiya Kagaku Kk | Decorating coating compound of tin can |
| CN103436139A (en) * | 2013-08-14 | 2013-12-11 | 中华制漆（深圳）有限公司 | Sulphur-resisting acid-proof food can inner wall paint and preparation method thereof |
| CN103709910A (en) * | 2013-12-20 | 2014-04-09 | 广州慧谷工程材料有限公司 | BPA-free (bisphenol A-free) food packaging material paint, and preparation method and application thereof |
| CN104098991A (en) * | 2014-06-24 | 2014-10-15 | 江门百得利包装材料有限公司 | Coating for inner surface of aluminium food packaging container and manufacturing method thereof |
| CN105061739A (en) * | 2015-09-08 | 2015-11-18 | 常州华科聚合物股份有限公司 | Paint resin for cans/tins and preparation method thereof, and paint composition for cans/tins |
| CN105131796A (en) * | 2015-09-06 | 2015-12-09 | 扬州扬瑞新型材料有限公司 | Acid food can inner wall paint and preparation method therefor |
-
2016
- 2016-08-26 CN CN201610736076.XA patent/CN106433417A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03146574A (en) * | 1989-11-01 | 1991-06-21 | Sakuranomiya Kagaku Kk | Decorating coating compound of tin can |
| CN103436139A (en) * | 2013-08-14 | 2013-12-11 | 中华制漆（深圳）有限公司 | Sulphur-resisting acid-proof food can inner wall paint and preparation method thereof |
| CN103709910A (en) * | 2013-12-20 | 2014-04-09 | 广州慧谷工程材料有限公司 | BPA-free (bisphenol A-free) food packaging material paint, and preparation method and application thereof |
| CN104098991A (en) * | 2014-06-24 | 2014-10-15 | 江门百得利包装材料有限公司 | Coating for inner surface of aluminium food packaging container and manufacturing method thereof |
| CN105131796A (en) * | 2015-09-06 | 2015-12-09 | 扬州扬瑞新型材料有限公司 | Acid food can inner wall paint and preparation method therefor |
| CN105061739A (en) * | 2015-09-08 | 2015-11-18 | 常州华科聚合物股份有限公司 | Paint resin for cans/tins and preparation method thereof, and paint composition for cans/tins |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112266684A (en) * | 2020-09-30 | 2021-01-26 | 苏州市三新材料科技股份有限公司 | High-sulfur-resistance protein coating for beverage cans and preparation method thereof |
| CN112266684B (en) * | 2020-09-30 | 2022-04-26 | 苏州市三新材料科技股份有限公司 | High-sulfur-resistance protein coating for beverage cans and preparation method thereof |
| WO2023086919A1 (en) * | 2021-11-12 | 2023-05-19 | Swimc Llc | Coating system for containers |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170222 |
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| WD01 | Invention patent application deemed withdrawn after publication |