CN111484791A - Anti-skinning epoxy weather-resistant coating - Google Patents
Anti-skinning epoxy weather-resistant coating Download PDFInfo
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- CN111484791A CN111484791A CN202010482454.2A CN202010482454A CN111484791A CN 111484791 A CN111484791 A CN 111484791A CN 202010482454 A CN202010482454 A CN 202010482454A CN 111484791 A CN111484791 A CN 111484791A
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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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
- C09D5/08—Anti-corrosive 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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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
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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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
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three 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)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to the technical field of coatings, in particular to an anti-skinning epoxy weather-resistant coating which comprises the following components in parts by mass: 150 parts of bisphenol A type epoxy resin, 2-3 parts of modified silicon-coated nano titanium dioxide, 12-18 parts of active diluent, 1-2 parts of dispersing agent, 1-2 parts of flatting agent, 1-2 parts of defoaming agent, 1-2 parts of curing agent, 10-12 parts of high polymer material-coated glass beads and 3-6 parts of cellulose. The invention provides an anti-skinning epoxy weather-resistant paint, which is improved in coating component, ensures the weather-resistant and corrosion-resistant performance of the paint, improves the anti-skinning performance, and is not easy to fall off.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to an anti-skinning epoxy weather-resistant coating.
Background
The paint is a material which can be coated on the surface of an object by different construction processes to form a continuous solid film with firm adhesion and certain strength, and the film formed by the method is generally called a coating film, also called a paint film or a coating. The coating belongs to a high molecular compound type, and belongs to a fine chemical product according to the classification of modern popular chemical products, and the modern coating gradually becomes a multifunctional engineering material, which is an important industry in the chemical industry.
According to the film forming substance of the paint, the paint can be classified into alkyd, epoxy, chlorinated rubber, acrylic acid, polyurethane, ethylene and other types of paints, wherein the epoxy anticorrosive paint is a common anticorrosive paint, is generally used as a primer to be coated on the surface of metal, has excellent binding power, water resistance and anticorrosive performance, is widely applied to the anticorrosive protection of steel and other metals and nonferrous metals such as copper, aluminum and the like, and is one of the most widely used anticorrosive paints. However, epoxy resin contains ether bond, and the coating is easy to degrade and break chain after being irradiated by sunlight and ultraviolet rays, so the epoxy coating is not resistant to outdoor sun exposure, is easy to remove gloss and chalking, and has poor weather resistance.
To this end, chinese patent with patent No. CN102796439B, granted under patent publication No. CN102796439B, in 2015, 06, 24, discloses a solvent-free nano-modified epoxy weather-resistant anticorrosive coating and a preparation method thereof, wherein silane coupling agents KH-560 with epoxy groups are used to treat silicon-coated nano-titanium dioxide particles, so that the composite particles have epoxy groups on the surface, and the epoxy groups participate in polymerization reaction and the epoxy groups and epoxy resin interact well, thereby enhancing the interaction force between the interfaces formed by the particles and the polymer, enabling the interfaces to have ideal bonding energy, and improving the dispersibility of nanoparticles in the resin, thereby improving the weather resistance of the composite coating.
However, the coating was found to be skinned seriously and to fall off during use.
Disclosure of Invention
In order to solve the problems of the epoxy coating in the prior art, the invention provides the anti-skinning epoxy weather-resistant coating, which has the advantages that the weather-resistant and anti-corrosion performance of the coating is ensured, the anti-skinning performance is improved and the anti-skinning epoxy weather-resistant coating is not easy to fall off through improving the components of the coating.
The technical scheme adopted by the invention is as follows:
an anti-skinning epoxy weather-resistant coating comprises the following components:
bisphenol A epoxy resin, modified silicon coated nano titanium dioxide, active diluent, dispersing agent, leveling agent, defoaming agent, curing agent, high polymer material coated glass beads and cellulose.
Preferably, the mass parts of the components are as follows: 150 parts of bisphenol A type epoxy resin, 2-3 parts of modified silicon-coated nano titanium dioxide, 12-18 parts of active diluent, 1-2 parts of dispersing agent, 1-2 parts of flatting agent, 1-2 parts of defoaming agent, 1-2 parts of curing agent, 10-12 parts of high polymer material-coated glass beads and 3-6 parts of cellulose.
Furthermore, the mass parts of the components are as follows: 150 parts of bisphenol A epoxy resin, 2-3 parts of modified silicon-coated nano titanium dioxide, 15 parts of reactive diluent, 1-2 parts of dispersing agent, 1-2 parts of flatting agent, 1-2 parts of defoaming agent, 1-2 parts of curing agent, 12 parts of high polymer material-coated glass beads and 5-6 parts of cellulose.
Preferably, the polymer material used for coating the glass beads with the polymer material is a thermoplastic elastomer.
Preferably, the thermoplastic elastomer is a block copolymer of styrene and butadiene, a block copolymer of styrene and isoprene, or a copolymer of styrene and butadiene, isoprene, or a hydrogenated product of a copolymer of styrene and butadiene or styrene and isoprene.
Preferably, the thermoplastic elastomer is a block copolymer of styrene and butadiene or a block copolymer of styrene and isoprene.
Preferably, the cellulose is hydroxyethyl cellulose and/or hydroxypropyl methyl cellulose.
Preferably, the particle size of the polymer material coated glass beads ranges from 15 microns to 50 microns.
Preferably, the coating also comprises polyacrylate emulsion, and the using amount of the polyacrylate emulsion is half of that of the polymer material coated glass microspheres.
Preferably, the polyacrylate emulsion has a glass transition temperature of from 12 ℃ to 15 ℃.
Through the implementation of the technical scheme, the invention has the following beneficial effects:
1. by improving the composition of the coating and adding the high polymer material to coat the glass beads, the hardening performance of the coating is improved, so that the anti-skinning effect is improved.
2. Meanwhile, the addition of the cellulose is beneficial to promoting the effect of coating the glass beads with the high polymer material, and the self water retention property ensures that the slurry cannot crack due to too fast drying after being coated, enhances the strength after hardening and reduces the falling rate.
3. The functions of the components are balanced by determining the mass parts of the components, so that the performance of the coating is further improved.
4. The polyacrylate emulsion is added, and the anti-skinning performance is further improved by virtue of the film forming property of the polyacrylate emulsion.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments. It is to be understood that the embodiments of the present invention are merely for illustrating the present invention and not for limiting the present invention, and that various substitutions and alterations made according to the common knowledge and conventional means in the art without departing from the technical idea of the present invention are included in the scope of the present invention.
Example 1
An anti-skinning epoxy weather-resistant coating comprises the following components in parts by mass:
the weight portions of the components are as follows: 150 parts of bisphenol A epoxy resin, 2 parts of modified silicon-coated nano titanium dioxide, 15 parts of reactive diluent, 2 parts of dispersing agent, 1 part of flatting agent, 2 parts of defoaming agent, 1 part of curing agent, 10 parts of high polymer material-coated glass beads and 3 parts of lignocellulose. The particle size of the glass beads coated by the high polymer material is 15-30 microns, and the used high polymer material is a copolymer of styrene, butadiene and isoprene.
The defoaming agent, the leveling agent and the dispersing agent of the nano modified epoxy weather-resistant solvent-free anticorrosive paint are good chemical products in Changzhou city, and the brands are SPA-202, HEUR-D and 5040 respectively.
The selected diluent is cashew nut shell oil modified epoxy resin active diluent (produced by Shanghai Meidong biomaterial Co., Ltd., the mark is MD2013), is a low-molecular compound with an epoxy group, has low volatility, can directly participate in the curing reaction of the epoxy resin, becomes a part of a cross-linked network structure of an epoxy resin cured product, has small influence on the performance of the cured product, and can also play a toughening role on a coating.
The curing agent is a cashew nut shell oil modified epoxy resin curing agent (produced by Shanghai Meidong biomaterial Co., Ltd., the trade name is MD2008), is a modified phenolic aldehyde amine curing agent, can be cured at a low temperature of (-5 ℃) and in a humid environment, and ensures that the cured epoxy resin has the characteristics of good luster, good corrosion resistance, excellent mechanical property and the like.
Example 2
An anti-skinning epoxy weather-resistant coating comprises the following components in parts by mass:
the weight portions of the components are as follows: 120 parts of bisphenol A epoxy resin, 3 parts of modified silicon-coated nano titanium dioxide, 12 parts of reactive diluent, 1 part of dispersing agent, 2 parts of flatting agent, 1 part of defoaming agent, 2 parts of curing agent, 10 parts of high polymer material-coated glass beads and 6 parts of hydroxypropyl methyl cellulose. The particle size of the glass beads coated by the high polymer material is 20-30 microns, and the used high polymer material is a block copolymer of styrene and isoprene.
Example 3
An anti-skinning epoxy weather-resistant coating comprises the following components in parts by mass:
the weight portions of the components are as follows: 135 parts of bisphenol A epoxy resin, 2 parts of modified silicon-coated nano titanium dioxide, 12 parts of reactive diluent, 1 part of dispersing agent, 1 part of flatting agent, 2 parts of defoaming agent, 2 parts of curing agent, 10 parts of high polymer material-coated glass beads and 5 parts of hydroxyethyl cellulose. The particle size of the glass microballoon coated by the high polymer material is 30-45 microns, and the used high polymer material is a block copolymer of styrene and butadiene.
Example 4
An anti-skinning epoxy weather-resistant coating comprises the following components in parts by mass:
the weight portions of the components are as follows: 130 parts of bisphenol A epoxy resin, 2 parts of modified silicon-coated nano titanium dioxide, 18 parts of reactive diluent, 2 parts of dispersing agent, 2 parts of flatting agent, 1 part of defoaming agent, 2 parts of curing agent, 12 parts of high polymer material-coated glass beads, 3 parts of hydroxyethyl cellulose and 6 parts of polyacrylate emulsion. The particle size of the glass beads coated by the high polymer material is 35-50 microns, and the used high polymer material is a copolymer of styrene, butadiene and isoprene.
Example 5
An anti-skinning epoxy weather-resistant coating comprises the following components in parts by mass:
the weight portions of the components are as follows: 150 parts of bisphenol A epoxy resin, 2 parts of modified silicon-coated nano titanium dioxide, 15 parts of reactive diluent, 1 part of dispersing agent, 1 part of flatting agent, 1 part of defoaming agent, 1 part of curing agent, 12 parts of high polymer material-coated glass beads, 3 parts of hydroxyethyl cellulose and 6 parts of polyacrylate emulsion. The particle size of the glass microballoon coated with the high polymer material is 25-30 microns, and the used high polymer material is a hydride of a copolymer of styrene and isoprene.
Comparative example 1:
the paint is obtained according to the Chinese invention patent with the patent grant publication number of CN 102796439B.
Comparative example 2:
the difference from example 1 is that no cellulose is added.
Detection standard:
the coatings obtained in each example and comparative example were sprayed on the surface of a general firebrick, and the adhesion resistance was examined by heat-treating the firebrick with the sprayed coatings on the upper and lower sides thereof for 3 hours at 520 ℃ to 815 ℃ and 1200 ℃ with 20% potassium sulfate and 10% calcium sulfate as the skinning materials.
The results are shown in Table 1.
| Low temperature blocking resistance (520 ℃ C.) | Moderate temperature anti-caking (815 ℃ C.) | High temperature blocking resistance (1200 ℃ C.) | |
| Example 1 | Non-adhesive bonding | Non-adhesive bonding | Bonding of |
| Example 2 | Non-adhesive bonding | Non-adhesive bonding | Non-adhesive bonding |
| Example 3 | Non-adhesive bonding | Non-adhesive bonding | Non-adhesive bonding |
| Example 4 | Non-adhesive bonding | Non-adhesive bonding | Non-adhesive bonding |
| Example 5 | Non-adhesive bonding | Non-adhesive bonding | Non-adhesive bonding |
| Comparative example 1 | Bonding of | Bonding of | Bonding of |
| Comparative example 2 | Non-adhesive bonding | Bonding of | Bonding of |
As can be seen from Table 1, the nano-silica anti-skinning spray paint prepared by the method can keep good anti-skinning performance under various temperature conditions, and has better anti-skinning performance compared with the paint obtained by the prior art and the paint obtained without using cellulose.
Claims (10)
1. An anti-skinning epoxy weather-resistant paint is characterized by comprising the following components: bisphenol A epoxy resin, modified silicon coated nano titanium dioxide, active diluent, dispersing agent, leveling agent, defoaming agent, curing agent, high polymer material coated glass beads and cellulose.
2. The anti-skinning epoxy weather-resistant coating as claimed in claim 1, wherein the coating comprises the following components in parts by mass: 150 parts of bisphenol A type epoxy resin, 2-3 parts of modified silicon-coated nano titanium dioxide, 12-18 parts of active diluent, 1-2 parts of dispersing agent, 1-2 parts of flatting agent, 1-2 parts of defoaming agent, 1-2 parts of curing agent, 10-12 parts of high polymer material-coated glass beads and 3-6 parts of cellulose.
3. The anti-skinning epoxy weather-resistant coating as claimed in claim 2, wherein the coating comprises the following components in parts by mass: 150 parts of bisphenol A epoxy resin, 2-3 parts of modified silicon-coated nano titanium dioxide, 15 parts of reactive diluent, 1-2 parts of dispersing agent, 1-2 parts of flatting agent, 1-2 parts of defoaming agent, 1-2 parts of curing agent, 12 parts of high polymer material-coated glass beads and 5-6 parts of cellulose.
4. The anti-skinning epoxy weather-resistant coating as claimed in claim 1, wherein the polymer material used for coating the glass beads with the polymer material is a thermoplastic elastomer.
5. The anti-skinning epoxy weatherable coating of claim 4, wherein the thermoplastic elastomer is a block copolymer of styrene and butadiene, a block copolymer of styrene and isoprene, or a copolymer of styrene and butadiene, isoprene, or a hydrogenated product of a copolymer of styrene and butadiene or styrene and isoprene.
6. The anti-skinning epoxy weatherable coating of claim 5 wherein the thermoplastic elastomer is a block copolymer of styrene and butadiene or a block copolymer of styrene and isoprene.
7. The anti-skinning epoxy weatherable coating according to claim 1, wherein the cellulose is hydroxyethyl cellulose and/or hydroxypropyl methyl cellulose.
8. The anti-skinning epoxy weatherable coating according to claim 1, wherein the polymeric material-coated glass beads have a particle size ranging from 15 to 50 μm.
9. The anti-skinning epoxy weatherable coating of claim 1, further comprising a polyacrylate emulsion in an amount of half of the amount of the polymer coated glass beads.
10. The anti-skinning epoxy weatherable coating of claim 9 wherein the polyacrylate emulsion has a glass transition temperature of from 12 ℃ to 15 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010482454.2A CN111484791A (en) | 2020-05-29 | 2020-05-29 | Anti-skinning epoxy weather-resistant coating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010482454.2A CN111484791A (en) | 2020-05-29 | 2020-05-29 | Anti-skinning epoxy weather-resistant coating |
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| CN111484791A true CN111484791A (en) | 2020-08-04 |
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| CN202010482454.2A Withdrawn CN111484791A (en) | 2020-05-29 | 2020-05-29 | Anti-skinning epoxy weather-resistant coating |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113736339A (en) * | 2021-08-11 | 2021-12-03 | 湖州龙溪风华乳胶涂料厂 | Anti-skinning epoxy weather-resistant coating and preparation method thereof |
-
2020
- 2020-05-29 CN CN202010482454.2A patent/CN111484791A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113736339A (en) * | 2021-08-11 | 2021-12-03 | 湖州龙溪风华乳胶涂料厂 | Anti-skinning epoxy weather-resistant coating and preparation method thereof |
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Application publication date: 20200804 |