CN106349862A - Food can inner wall coating with high adhesive power - Google Patents
Food can inner wall coating with high adhesive power Download PDFInfo
- Publication number
- CN106349862A CN106349862A CN201610736064.7A CN201610736064A CN106349862A CN 106349862 A CN106349862 A CN 106349862A CN 201610736064 A CN201610736064 A CN 201610736064A CN 106349862 A CN106349862 A CN 106349862A
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- Prior art keywords
- food
- starch
- wall paint
- coating
- add
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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
- C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
- C09D161/04—Condensation polymers of aldehydes or ketones with phenols only
- C09D161/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
- C09D161/14—Modified phenol-aldehyde condensates
-
- 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
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses food can inner wall coating with high adhesive power, made from modified phenolic resin, waterborne polyurethane, Arabic gum, modified starch, filling material, an aid, and a solvent. Compared with existing food can inner wall coatings, the food can inner wall coating can provide greatly improved storage stability for food in a food can, and film of the coating has long life that is 2-2.5 times the life of common food can inner wall coating film; a coating layer formed by applying the food can inner wall coating is tough, highly bright, high in acid and alkali resistance, stable in performance, good in corrosion resistance and discoloring resistance and high in adhesive power, the barrier capacity of the film is excellent, food can be better stored, the flavor of the food is unaffected, and food safety can also be guaranteed safely for a long time; a film formed by the coating prepared herein is high in corrosion resistance, is colorless and transparent, has all technical indexes meeting the food hygiene standard and is high in safety; the production process is simple and highly economical.
Description
Technical field
The present invention relates to metal packaging coating field, more particularly to a kind of food top tank structure painting with high adhesion force
Material.
Background technology
Food cans inner-wall paint, the coating for canned food interior finishing is it is necessary to the general utility functions possessing are that film is to human body
Must be harmless, and abnormal flavour will not be brought to food, especially beverage, flavoring agent, drinks etc. is larger to the corrosivity of its container, right
The requirement of food cans corrosion resistance is higher.The hygienic quality of coating directly affects food consumption safety.Develop in recent years
Although can be used for the demand that tank interlayer coatings can meet some occasions on market, the internal coating attachment of most of food cans
Power is appointed so not high enough, easily occurs coming off, the phenomenon of crackle after long-time storage food, for the storage of canned food, health
There is very big hidden danger in safety etc..
Content of the invention
Above-mentioned in order to overcome the shortcomings of, the invention provides a kind of food cans inner-wall paint with high adhesion force.
The present invention is achieved through the following technical solutions:
A kind of food cans inner-wall paint with high adhesion force, is made up of following component by weight: phenol-formaldehyde resin modified 75,
Aqueous polyurethane 25, arabic gum 3, modified starch 7, filler 22, auxiliary agent 1, solvent 38,
Described filler is titanium dioxide, bentonite is mixed by 5:3 mass ratio；
Described auxiliary agent includes dispersant, levelling agent and defoamer, and wherein, dispersant, levelling agent, defoamer mass ratio are 1:
0.6:0.2；
Described solvent is deionized water.
Further, the preparation method of described phenol-formaldehyde resin modified is:
1) add phenolic resin in reaction vessel, then add catalyst, the amount of catalyst is epoxy resin quality
0.2%-0.3%, controls catalyst to drip in 30-40 minute；Stirring is warming up to 112-115 DEG C, adds tetramethylolmethane, season
Penta tetrol is 0.1:1, keeping temperature condensing reflux 1-3 hour with the mass ratio of phenolic resin, obtains mixture a；Described urge
Agent is tetraethylammonium bromide；
2) add the sodium bicarbonate of tetramethylolmethane quality 1/5th in dark compound a, temperature is reduced to 88 DEG C, insulation
After 10min, add acrylic acid and the sodium peroxydisulfate mixture of tetramethylolmethane quality 1/5th, temperature is raised to 98 DEG C, with
200r/min rotating speed stirs 10min, is further continued for being incubated 10min, cooling discharging, obtains phenol-formaldehyde resin modified.
Further, described dispersant is sodium silicate, and described defoamer is silicone defoamer, and described levelling agent is
byk-333.
Further, described titanium dioxide and swelling soil granularity are 280-300 mesh, and titanium dioxide is high through 380 DEG C with bentonite
The process of warm mixed calcining 4-6min.
Further, described modified starch is made up of following component by weight: corn starch 10, water caltrop starch 1, green
Bean starch 3, Rhizoma Nelumbinis starch 4；Its preparation method is: will be uniformly admixed together to corn starch, water caltrop starch, green starch, obtain
Mixing starch, is added in 95 DEG C of hot water by 1:4 mass ratio, after stirring 25min, adds the hydroxide of water caltrop starch quality 5%
Sodium, after 500r/min rotating speed stirring 20min, is cooled to 60 DEG C, adds Rhizoma Nelumbinis starch, stir 10min with 120r/min rotating speed, that is,
Can.
Further, comprise the steps: for phenol-formaldehyde resin modified and stirring solvent to be heated to 102 DEG C, after being completely dissolved,
Then be cooled to 60 DEG C, add aqueous polyurethane, arabic gum, modified starch, filler, auxiliary agent grind 2-3h after, grinding thin
Degree is less than 5.0um, then stirs 15min with 1500r/min rotating speed, that is, obtain described acidic food can inner-wall paint.
The coating system of present invention resin based on phenol-formaldehyde resin modified and aqueous polyurethane, cooperation is the present invention prepare
The synergism of filler, the coating that it forms has excellent acidproof energy, improves hardness of film, pliability, resistance to marring, with
When, there is excellent glossiness, levelability and weatherability, also improve corrosion-resistant, oil resistant, cold tolerance, and make the present invention
Hardness and toughness reach balance, there is larger impact resistance ability；Modified starch is added in coating system and solvent, passes through
The assosting effect of arabic gum, can be uniformly dispersed between coating system molecule, and the adhesive force of coating is greatly improved
And heat resistance.
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 greatly
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 2-2.5 times, and the enamelled coating being formed after food cans inner-wall paint coating of the present invention is tough and tensile, and brightness is high, and acid resistance is strong,
Stable performance, is difficult to be corroded, invariant color, and adhesive force is very strong, and the obstructing capacity of film is very good, storage food that can be better
Product, neither affect the local flavor of food, can ensure safely the safety of food for a long time, after the coating film forming of present invention preparation again
Anticorrosive property is strong, appearance colorless is transparent, all technical all meets food hygienic standard, safe；And production technology
Simply, good economy performance.
Specific embodiment
A kind of food cans inner-wall paint with high adhesion force, is made up of following component: modified phenolic resin by weight
Fat 75, aqueous polyurethane 25, arabic gum 3, modified starch 7, filler 22, auxiliary agent 1, solvent 38,
Described filler is titanium dioxide, bentonite is mixed by 5:3 mass ratio；
Described auxiliary agent includes dispersant, levelling agent and defoamer, and wherein, dispersant, levelling agent, defoamer mass ratio are 1:
0.6:0.2；
Described solvent is deionized water.
Further, the preparation method of described phenol-formaldehyde resin modified is:
1) add phenolic resin in reaction vessel, then add catalyst, the amount of catalyst is epoxy resin quality
0.2%-0.3%, controls catalyst to drip in 30-40 minute；Stirring is warming up to 112-115 DEG C, adds tetramethylolmethane, season
Penta tetrol is 0.1:1, keeping temperature condensing reflux 1-3 hour with the mass ratio of phenolic resin, obtains mixture a；Described urge
Agent is tetraethylammonium bromide；
2) add the sodium bicarbonate of tetramethylolmethane quality 1/5th in dark compound a, temperature is reduced to 88 DEG C, insulation
After 10min, add acrylic acid and the sodium peroxydisulfate mixture of tetramethylolmethane quality 1/5th, temperature is raised to 98 DEG C, with
200r/min rotating speed stirs 10min, is further continued for being incubated 10min, cooling discharging, obtains phenol-formaldehyde resin modified.
Further, described dispersant is sodium silicate, and described defoamer is silicone defoamer, and described levelling agent is
byk-333.
Further, described titanium dioxide and swelling soil granularity are 280-300 mesh, and titanium dioxide is high through 380 DEG C with bentonite
The process of warm mixed calcining 4-6min.
Further, described modified starch is made up of following component by weight: corn starch 10, water caltrop starch 1, green
Bean starch 3, Rhizoma Nelumbinis starch 4；Its preparation method is: will be uniformly admixed together to corn starch, water caltrop starch, green starch, obtain
Mixing starch, is added in 95 DEG C of hot water by 1:4 mass ratio, after stirring 25min, adds the hydroxide of water caltrop starch quality 5%
Sodium, after 500r/min rotating speed stirring 20min, is cooled to 60 DEG C, adds Rhizoma Nelumbinis starch, stir 10min with 120r/min rotating speed, that is,
Can.
Further, comprise the steps: for phenol-formaldehyde resin modified and stirring solvent to be heated to 102 DEG C, after being completely dissolved,
Then be cooled to 60 DEG C, add aqueous polyurethane, arabic gum, modified starch, filler, auxiliary agent grind 2-3h after, grinding thin
Degree is less than 5.0um, then stirs 15min with 1500r/min rotating speed, that is, obtain described acidic food can inner-wall paint.
Food cans inner-wall paint performance test of the present invention:
Table 1
As can be seen from Table 1, food cans inner-wall paint various aspects of performance all comparative superiorities of the present invention.
Food cans inner-wall paint of the present invention is coated on test board, after forming coating, is placed in beaker, this beaker comprises
Acidity (ph is in the 2.5-3) solution of enough boilings, the coated test board of submergence, after immersion for a period of time, will be coated
Plate with hot water injection, be dried, in order to assess adhesive force, the interface using the coated plate of razor blade submergence wherein is parallel
Vertically scratch coating 15 times, assess foaming, glossiness, adhesive force with the grade of 0 (optimal) to 5 (poor).Coating is tested
Result is shown in Table 2.
Table 2
As can be seen from Table 2, food cans inner-wall paint coating gloss of the present invention after soaking 50min in the acid solution of boiling
Just begin to decline, after soaking 70 minutes, the decline of bubble and adhesive force just occurs, be indicated above food top tank structure of the present invention and apply
Material glossiness, adhesive force are very good.
Claims (6)
1. a kind of food cans inner-wall paint with high adhesion force is it is characterised in that be made up of following component by weight: changes
Property phenolic resin 75, aqueous polyurethane 25, arabic gum 3, modified starch 7, filler 22, auxiliary agent 1, solvent 38,
Described filler is titanium dioxide, bentonite is mixed by 5:3 mass ratio；
Described auxiliary agent includes dispersant, levelling agent and defoamer, and wherein, dispersant, levelling agent, defoamer mass ratio are 1:
0.6:0.2；
Described solvent is deionized water.
2. a kind of food cans inner-wall paint with high adhesion force according to claim 1 is it is characterised in that described modification
The preparation method of phenolic resin is:
1) add phenolic resin in reaction vessel, then add catalyst, the amount of catalyst is epoxy resin quality
0.2%-0.3%, controls catalyst to drip in 30-40 minute；Stirring is warming up to 112-115 DEG C, adds tetramethylolmethane, season
Penta tetrol is 0.1:1, keeping temperature condensing reflux 1-3 hour with the mass ratio of phenolic resin, obtains mixture a；Described urge
Agent is tetraethylammonium bromide；
2) add the sodium bicarbonate of tetramethylolmethane quality 1/5th in dark compound a, temperature is reduced to 88 DEG C, insulation
After 10min, add acrylic acid and the sodium peroxydisulfate mixture of tetramethylolmethane quality 1/5th, temperature is raised to 98 DEG C, with
200r/min rotating speed stirs 10min, is further continued for being incubated 10min, cooling discharging, obtains phenol-formaldehyde resin modified.
3. a kind of food cans inner-wall paint with high adhesion force according to claim 1 is it is characterised in that described dispersion
Agent is sodium silicate, and described defoamer is silicone defoamer, and described levelling agent is byk-333.
4. a kind of food cans inner-wall paint with high adhesion force according to claim 1 is it is characterised in that described titanium white
Powder and swelling soil granularity are 280-300 mesh, and titanium dioxide and bentonite are through the process of 380 DEG C of high temperature mixed calcining 4-6min.
5. a kind of food cans inner-wall paint with high adhesion force according to claim 1 is it is characterised in that described modification
Starch is made up of following component by weight: corn starch 10, water caltrop starch 1, green starch 3, Rhizoma Nelumbinis starch 4；Its preparation side
Method is: will be uniformly admixed together to corn starch, water caltrop starch, green starch, obtain mixing starch, add by 1:4 mass ratio
It is added in 95 DEG C of hot water, after stirring 25min, adds the sodium hydroxide of water caltrop starch quality 5%, with the stirring of 500r/min rotating speed
After 20min, it is cooled to 60 DEG C, adds Rhizoma Nelumbinis starch, 10min is stirred with 120r/min rotating speed, you can.
6. a kind of preparation method of acidic food can inner-wall paint as claimed in claim 1 is it is characterised in that include following walking
Rapid: phenol-formaldehyde resin modified and stirring solvent to be heated to 102 DEG C, after being completely dissolved, is then cooled to 60 DEG C, add the poly- ammonia of aqueouss
After ester, arabic gum, modified starch, filler, auxiliary agent grind 2-3h, the fineness of grinding is less than 5.0um, then is turned with 1500r/min
Speed stirring 15min, that is, obtain described acidic food can inner-wall paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610736064.7A CN106349862A (en) | 2016-08-26 | 2016-08-26 | Food can inner wall coating with high adhesive power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610736064.7A CN106349862A (en) | 2016-08-26 | 2016-08-26 | Food can inner wall coating with high adhesive power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106349862A true CN106349862A (en) | 2017-01-25 |
Family
ID=57855123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610736064.7A Pending CN106349862A (en) | 2016-08-26 | 2016-08-26 | Food can inner wall coating with high adhesive power |
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Citations (6)
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|---|---|---|---|---|
| CN1703470A (en) * | 2002-11-05 | 2005-11-30 | Ppg工业俄亥俄公司 | Additives for low voc aqueous coatings |
| JP2007284541A (en) * | 2006-04-14 | 2007-11-01 | Kansai Paint Co Ltd | Water-based coating composition |
| CN102146248A (en) * | 2011-04-08 | 2011-08-10 | 广州慧谷化学有限公司 | Acid resistance and high temperature resistance antiseptic waterborne coating for inner wall of pop can |
| CN103254739A (en) * | 2013-03-08 | 2013-08-21 | 武汉工程大学 | Low-viscosity epoxy acrylate paint for inner wall of food can and preparation method thereof |
| CN103409035A (en) * | 2013-07-05 | 2013-11-27 | 蚌埠飞浦科技包装材料有限公司 | Special paint for food can and preparation method thereof |
| CN103649157A (en) * | 2011-05-23 | 2014-03-19 | Ppg工业俄亥俄公司 | Coating compositions with improved adhesion to containers |
-
2016
- 2016-08-26 CN CN201610736064.7A patent/CN106349862A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1703470A (en) * | 2002-11-05 | 2005-11-30 | Ppg工业俄亥俄公司 | Additives for low voc aqueous coatings |
| JP2007284541A (en) * | 2006-04-14 | 2007-11-01 | Kansai Paint Co Ltd | Water-based coating composition |
| CN102146248A (en) * | 2011-04-08 | 2011-08-10 | 广州慧谷化学有限公司 | Acid resistance and high temperature resistance antiseptic waterborne coating for inner wall of pop can |
| CN103649157A (en) * | 2011-05-23 | 2014-03-19 | Ppg工业俄亥俄公司 | Coating compositions with improved adhesion to containers |
| CN103254739A (en) * | 2013-03-08 | 2013-08-21 | 武汉工程大学 | Low-viscosity epoxy acrylate paint for inner wall of food can and preparation method thereof |
| CN103409035A (en) * | 2013-07-05 | 2013-11-27 | 蚌埠飞浦科技包装材料有限公司 | Special paint for food can and preparation method thereof |
Non-Patent Citations (4)
| Title |
|---|
| 张力田: "《变性淀粉》", 31 August 1992, 华南理工大学出版社 * |
| 方倩等: "新型食品容器内壁无毒涂料的研制及应用", 《中国涂料》 * |
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Application publication date: 20170125 |
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