CN111393964A - Graphene modified strong-acid-alkali-resistant electroplating powder coating and preparation method thereof - Google Patents
Graphene modified strong-acid-alkali-resistant electroplating powder coating and preparation method thereof Download PDFInfo
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- CN111393964A CN111393964A CN202010338972.7A CN202010338972A CN111393964A CN 111393964 A CN111393964 A CN 111393964A CN 202010338972 A CN202010338972 A CN 202010338972A CN 111393964 A CN111393964 A CN 111393964A
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- 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
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- 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
- C09D5/03—Powdery paints
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- 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
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
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- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/80—Processes for incorporating ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
The invention discloses a graphene modified strong acid and alkali resistant electroplating powder coating and a preparation method thereof, wherein the graphene modified strong acid and alkali resistant electroplating powder coating comprises a component A and a component B, wherein the component A comprises the following materials in percentage by mass: unsaturated polyester resin, coumarone resin, isophorone, silicon micropowder, a synergistic antioxidant, inorganic pigment and filler, zinc phosphate tetrahydrate, modified graphene, rutile titanium dioxide, a leveling agent, and a component B comprising a hardening agent. According to the invention, polyester resin with IPA content of 35-55% is selected as a main carrier, coumarone resin is selected as an auxiliary carrier, and modified graphene with strong stability is selected as a main additive, so that the modified graphene powder coating has excellent physical and mechanical properties on the premise of ensuring acid and alkali resistance of the powder coating.
Description
Technical Field
The invention relates to a graphene modified strong acid and alkali resistant electroplating powder coating and a preparation method thereof, belonging to the technical field of special coatings.
Background
The powder coating is a coating containing 100% of solid content and applied in a powder form, and unlike general organic solvent-based coatings and water-based coatings, does not use any organic solvent or water as a dispersion medium, but uses air as a dispersion medium. The powder coating is prepared by taking resin and pigment as a base, adding necessary curing agent, additive and the like according to a certain proportion, mixing, cooling the dispersion after melt extrusion, then finely crushing according to a set particle size, and finally carrying out classification screening. The coating film of the powder coating has the characteristics of firmness and durability, but the defect is that the acid and alkali resistance is poor, and the acid and alkali resistance of the conventional powder coating sold on the market is relatively common at present and is not suitable for extreme working environments.
Disclosure of Invention
Aiming at the problems in the prior art, the invention discloses a graphene modified strong acid and alkali resistant electroplating powder coating and a preparation method thereof, wherein polyester resin with 35-55% of IPA content is selected as a main carrier, coumarone resin is selected as an auxiliary carrier, and modified graphene with strong stability is selected as a main additive, so that the graphene modified strong acid and alkali resistant electroplating powder coating has excellent physical and mechanical properties on the premise of ensuring acid and alkali resistance.
The technical purpose of the invention is realized by the following technical scheme:
a graphene modified strong acid and alkali resistant electroplating powder coating comprises a component A and a component B, wherein the components in each component are calculated according to mass fractions,
the component A comprises:
the component B comprises:
hardening agent
The mass fraction of the unsaturated polyester resin isophthalic acid is 35-55%.
Preferably, the synergistic antioxidant is a phosphite antioxidant, a phenolic antioxidant and a hindered amine light stabilizer according to the proportion (3-8): (0-3): (0-2) mixing.
Preferably, the phosphite antioxidant is ethyl bis [ 2-methyl-4, 6-bis (1, 1' -dimethylethyl) phenol ] phosphate, bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite or tetrakis (2, 4-di-tert-butyl octaalkoxy-4, 4-biphenyl) phosphate.
Preferably, the phenolic antioxidant is N, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine, Irganox1010, Irganox1076 or Irganox 168; the hindered amine light stabilizer is bis (2,2,6, 6-tetramethyl-4-piperidyl) sebacate or tertiary amine Tinuvin 292.
Preferably, the modified graphene is dopamine in-situ surface modified graphene with a wafer-shaped structure.
Preferably, the hardener is one or a mixture of two of triglycidyl isocyanurate, tetraphenolethane epoxy resin and dicyclopentadiene.
Preferably, the inorganic pigment filler is precipitated barium, titanium yellow, cobalt green or copper chrome black.
Preferably, the mass ratio of the component A to the component B is 19: 1-4: 1.
Preferably, the leveling agent is P L P100, PV88, Modaflow II or Modaflow III
A preparation method of a graphene modified strong acid and alkali resistant electroplating powder coating comprises the following specific steps:
s1, heating a barrel of the mixing extrusion dispersing device to 100-200 ℃, and adding the component A mixture into a hopper of the mixing extrusion dispersing device according to the proportion;
s2, starting a screw of the mixing, extruding and dispersing device, and adjusting the rotating speed of the screw to be 45-80 r.min-1After the rotation speed of the screw is stable, starting the feeder, and extruding the mixture in the hopper through the screw in the screw cylinder;
s3, cooling the extruded mixture, and after the mixture is sufficiently cooled, feeding the mixture into a tablet press for crushing;
s4, feeding the crushed mixed material into a grinding machine to grind and pass through a 250-mesh sieve to obtain component A mixed powder;
s5, heating a barrel of the mixing extrusion dispersing device to 80-120 ℃, and adding the component B mixture into a hopper of the mixing extrusion dispersing device in proportion;
s6, starting a screw of the mixing, extruding and dispersing device, and adjusting the rotating speed of the screw to be 40-80 r.min-1After the rotation speed of the screw is stable, starting the feeder, and extruding the mixture in the hopper through the screw in the screw cylinder;
s7, cooling the extruded mixture, and after the mixture is sufficiently cooled, feeding the mixture into a tablet press for crushing;
s8, feeding the crushed mixed material into a grinding machine to grind and pass through a 250-mesh sieve to obtain B-component mixed powder;
and S9, adding the component A mixed powder obtained in the step S4 and the component B mixed powder obtained in the step S8 into a stirring dispersion kettle in proportion, and fully mixing to obtain the graphene modified strong acid and alkali resistant electroplating powder coating.
Has the advantages that: the invention discloses a graphene modified strong acid and alkali resistant electroplating powder coating and a preparation method thereof, and the graphene modified strong acid and alkali resistant electroplating powder coating has the following advantages:
1) the addition of the graphene with special sheet diameter (physical stripping method) reduces the change of a coating black and white phase of a coating in a strong acid and strong alkali solution, and improves the acid and alkali resistance of the coating;
2) the synergistic antioxidant is utilized, so that the stability and the aging resistance of the unsaturated polyester resin are improved, and the stability of the coating in strong acid and strong alkali environments is further improved;
3) by adjusting the content of IPA (isophthalic acid) in the unsaturated polyester resin, the acid and alkali resistance of the unsaturated polyester resin can be improved, and the physical and mechanical properties of the powder coating can be ensured;
4) the coumarone resin and the unsaturated polyester resin are respectively adopted to act synergistically with the hardening agent, so that the acid and alkali resistance of the coating is further improved.
Detailed Description
Example 1: the graphene modified strong acid and alkali resistant electroplating powder coating comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 19: 1; the materials in each component are calculated according to the mass fraction,
the component A comprises:
the component B comprises:
triglycidyl isocyanurate
Wherein the mass fraction of the unsaturated polyester resin isophthalic acid is 35%, and the synergistic antioxidant is tetra (2, 4-di-tert-butyl octaalkoxy-4, 4 biphenyl) phosphate.
Example 2: a graphene modified strong acid and alkali resistant electroplating powder coating comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 6:1, the materials in each component are calculated according to mass fractions,
the component A comprises:
the component B comprises:
tetrakisphenolethane epoxy resins
Wherein, the mass fraction of the isophthalic acid in the unsaturated polyester resin is 40 percent; among the synergistic antioxidants, tetrakis (2, 4-di-t-butyl octaalkoxy-4, 4 biphenyl) phosphate: irganox 1010: the mass ratio of the tertiary amine Tinuvin292 is 3:1: 1.
Example 3: a graphene modified strong acid and alkali resistant electroplating powder coating comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 4:1, the materials in each component are calculated according to mass fractions,
the component A comprises:
the component B comprises:
dicyclopentadiene;
wherein, the mass fraction of the isophthalic acid in the unsaturated polyester resin is 40 percent; in the synergistic antioxidant, ethyl bis [ 2-methyl-4, 6-bis (1, 1' -dimethylethyl) phenol ] phosphate: irganox 1076: the mass ratio of the tertiary amine Tinuvin292 is 8:3: 2.
Example 1, example 2 and example 3 were all prepared according to the following preparative procedure:
s1, heating a barrel of the mixing extrusion dispersing device to 200 ℃, and adding the component A mixture into a hopper of the mixing extrusion dispersing device according to the proportion;
s2, starting the screw of the mixing, extruding and dispersing device, and adjusting the rotating speed of the screw to 66 r.min-1After the rotation speed of the screw is stable, starting the feeder, and extruding the mixture in the hopper through the screw in the screw cylinder;
s3, cooling the extruded mixture, and after the mixture is sufficiently cooled, feeding the mixture into a tablet press for crushing;
s4, feeding the crushed mixed material into a grinding machine to grind and pass through a 250-mesh sieve to obtain component A mixed powder;
s5, heating a barrel of the mixing extrusion dispersing device to 100 ℃, and adding the component B mixture into a hopper of the mixing extrusion dispersing device according to the proportion;
s6, starting the screw of the mixing, extruding and dispersing device, and adjusting the rotating speed of the screw to 65 r.min-1After the rotation speed of the screw is stable, starting the feeder, and extruding the mixture in the hopper through the screw in the screw cylinder;
s7, cooling the extruded mixture, and after the mixture is sufficiently cooled, feeding the mixture into a tablet press for crushing;
s8, feeding the crushed mixed material into a grinding machine to grind and pass through a 250-mesh sieve to obtain B-component mixed powder;
and S9, adding the component A mixed powder obtained in the step S4 and the component B mixed powder obtained in the step S8 into a stirring dispersion kettle in proportion, and fully mixing to obtain the graphene modified strong acid and alkali resistant electroplating powder coating.
The products of examples 1, 2 and 3 and the existing product teflon powder coating were subjected to performance tests, and the test results are as follows:
TABLE 1
From the above table, compared with the prior art, the graphene modified strong acid and alkali resistant electroplating powder coating provided by the invention not only further improves the acid and alkali resistance of the powder coating, but also further improves the physical and mechanical properties of the powder coating.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. The graphene modified strong acid and alkali resistant electroplating powder coating is characterized by comprising a component A and a component B, wherein the components are calculated according to mass fractions,
the component A comprises:
55-75% of unsaturated polyester resin
5-7% of coumarone resin
0.8 to 1.5 percent of isophorone
2 to 10 percent of silicon micropowder
0.5 to 1.5 percent of synergistic antioxidant
1 to 3 percent of inorganic pigment and filler
5-15% of zinc phosphate tetrahydrate
0.5-1% of modified graphene
2-15% of rutile titanium dioxide
5 to 7 percent of flatting agent
The component B comprises:
hardening agent
The mass fraction of the unsaturated polyester resin isophthalic acid is 35-55%.
2. The graphene-modified strong acid and alkali electroplating-resistant powder coating as claimed in claim 1, wherein the synergistic antioxidant is a phosphite antioxidant, a phenolic antioxidant and a hindered amine light stabilizer in a ratio of (3-8): (0-3): (0-2) mixing.
3. The graphene-modified strong acid and alkali resistant electroplating powder coating as claimed in claim 2, wherein the phosphite antioxidant is bis [ 2-methyl-4, 6-bis (1, 1' -dimethylethyl) phenol ] ethyl phosphate, bis (2,4 di-tert-butylphenyl) pentaerythritol diphosphite or tetrakis (2, 4-di-tert-butyl octaalkoxy-4, 4 biphenyl) phosphate.
4. The graphene-modified strong acid and alkali plating resistant powder coating according to claim 3, wherein the phenolic antioxidant is N, N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexanediamine, Irganox1010, Irganox1076 or Irganox 168; the hindered amine light stabilizer is bis (2,2,6, 6-tetramethyl-4-piperidyl) sebacate or tertiary amine Tinuvin 292.
5. The graphene-modified strong acid and alkali electroplating-resistant powder coating as claimed in claim 1, wherein the modified graphene is a disc-shaped dopamine in-situ surface-modified graphene.
6. The graphene-modified strong acid and alkali plating resistant powder coating as claimed in claim 1, wherein the hardener is one or a mixture of two of triglycidyl isocyanurate, tetraphenolethane epoxy resin and dicyclopentadiene.
7. The graphene-modified strong acid and alkali resistant electroplating powder coating as claimed in claim 1, wherein the inorganic pigment and filler is precipitated barium, titanium yellow, cobalt green or copper chrome black.
8. The graphene-modified strong acid and alkali electroplating-resistant powder coating as claimed in claim 1, wherein the mass ratio of the component A to the component B is 19: 1-4: 1.
9. The graphene-modified acid and alkali resistant electroplating powder coating as claimed in claim 1, wherein the leveling agent is P L P100, PV88, Modaflow ii or Modaflow iii.
10. A preparation method of a graphene modified strong acid and alkali resistant electroplating powder coating, which is characterized in that the specific steps of the graphene modified strong acid and alkali resistant electroplating powder coating disclosed by claims 1-9 are as follows:
s1, heating a barrel of the mixing extrusion dispersing device to 100-200 ℃, and adding the component A mixture into a hopper of the mixing extrusion dispersing device according to the proportion;
s2, starting the screw of the mixing, extruding and dispersing device, and adjusting the rotating speed of the screw to be 45-80 r.min- 1After the rotation speed of the screw is stable, starting the feeder, and extruding the mixture in the hopper through the screw in the screw cylinder;
s3, cooling the extruded mixture, and after the mixture is sufficiently cooled, feeding the mixture into a tablet press for crushing;
s4, feeding the crushed mixed material into a grinding machine to grind and pass through a 250-mesh sieve to obtain component A mixed powder;
s5, heating a barrel of the mixing extrusion dispersing device to 80-120 ℃, and adding the mixture in the component B into a hopper of the mixing extrusion dispersing device according to the proportion;
s6, starting the screw of the mixing, extruding and dispersing device, and adjusting the rotating speed of the screw to be 40-80 r.min- 1After the rotation speed of the screw is stable, starting the feeder, and extruding the mixture in the hopper through the screw in the screw cylinder;
s7, cooling the extruded mixture, and after the mixture is sufficiently cooled, feeding the mixture into a tablet press for crushing;
s8, feeding the crushed mixed material into a grinding machine to grind and pass through a 250-mesh sieve to obtain B-component mixed powder;
and S9, adding the component A mixed powder obtained in the step S4 and the component B mixed powder obtained in the step S8 into a stirring dispersion kettle in proportion, and fully mixing to obtain the graphene modified strong acid and alkali resistant electroplating powder coating.
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| CN202010338972.7A CN111393964B (en) | 2020-04-26 | 2020-04-26 | Graphene modified strong-acid-alkali-resistant electroplating powder coating and preparation method thereof |
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|---|---|---|---|---|
| KR20110089835A (en) * | 2011-07-13 | 2011-08-09 | 이재환 | High density nano coating compositions |
| US9228111B2 (en) * | 2008-11-05 | 2016-01-05 | Posco | Resin composition for surface treatment of steel sheet and surface-treated steel sheet using the same |
| CN105254916A (en) * | 2015-09-30 | 2016-01-20 | 西南交通大学 | Preparation method for oxidized graphene-poly-dopamine composite aerogel |
| CN106752923A (en) * | 2016-11-28 | 2017-05-31 | 复旦大学 | A kind of damage resistant high, abrasion-resistant coatings material and preparation method thereof |
| CN108003759A (en) * | 2017-12-19 | 2018-05-08 | 衢州量智科技有限公司 | Auto shield powdery paints and preparation method thereof |
| CN110511367A (en) * | 2019-08-20 | 2019-11-29 | 安徽神剑新材料股份有限公司 | A kind of polyester resin for powder coating of containing graphene |
-
2020
- 2020-04-26 CN CN202010338972.7A patent/CN111393964B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9228111B2 (en) * | 2008-11-05 | 2016-01-05 | Posco | Resin composition for surface treatment of steel sheet and surface-treated steel sheet using the same |
| KR20110089835A (en) * | 2011-07-13 | 2011-08-09 | 이재환 | High density nano coating compositions |
| CN105254916A (en) * | 2015-09-30 | 2016-01-20 | 西南交通大学 | Preparation method for oxidized graphene-poly-dopamine composite aerogel |
| CN106752923A (en) * | 2016-11-28 | 2017-05-31 | 复旦大学 | A kind of damage resistant high, abrasion-resistant coatings material and preparation method thereof |
| CN108003759A (en) * | 2017-12-19 | 2018-05-08 | 衢州量智科技有限公司 | Auto shield powdery paints and preparation method thereof |
| CN110511367A (en) * | 2019-08-20 | 2019-11-29 | 安徽神剑新材料股份有限公司 | A kind of polyester resin for powder coating of containing graphene |
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