CN113214708A - Bottom surface containing type connecting coating and preparation method thereof - Google Patents
Bottom surface containing type connecting coating and preparation method thereof Download PDFInfo
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- CN113214708A CN113214708A CN202110460590.6A CN202110460590A CN113214708A CN 113214708 A CN113214708 A CN 113214708A CN 202110460590 A CN202110460590 A CN 202110460590A CN 113214708 A CN113214708 A CN 113214708A
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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
- C09D115/00—Coating compositions based on rubber derivatives
- C09D115/02—Rubber derivatives containing halogen
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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
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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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
Abstract
The invention discloses a bottom surface containing type connecting coating and a preparation method thereof. The bottom surface contained connecting coating comprises main paint and a curing agent; the main paint consists of the following raw materials in percentage by weight: 15 to 25 percent of first solvent, 10 to 16 percent of chlorinated rubber, 0.2 to 0.8 percent of dispersant, 0.6 to 1 percent of hydrated magnesium silicate, 0.4 to 0.8 percent of fumed silica, 0.8 to 1.3 percent of polyamide wax slurry, 2 to 7 percent of pigment, 3 to 8 percent of zinc phosphate, 3 to 8 percent of sericite, 15 to 25 percent of silica micropowder, 12 to 23 percent of second solvent and 5 to 10 percent of liquid epoxy resin; the first solvent is formed by mixing xylene and an aromatic hydrocarbon solvent S-100A; the second solvent is formed by mixing isopropanol and an aromatic hydrocarbon solvent S-100A; in the first solvent and the second solvent, S-100A: xylene: 1-isopropyl alcohol: (0.5-0.7): (0.2-0.4). The bottom surface containing type connecting coating can be directly coated on an old single-component coating without bottom biting and old coating insolubility, can not be bitten or dissolved by an upper double-component finish paint, and has the advantages of simple and convenient construction, quick drying and short coating interval.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a bottom surface containing type connecting coating and a preparation method thereof.
Background
After the coating is used for a period of time, the coating is affected by the external environment and is often damaged. It is typically recoated. In the recoating process, if the old coating is not cleaned, the old coating is often bitten or dissolved when a new coating is directly coated thereon, resulting in loosening from the substrate or poor interlayer adhesion.
Disclosure of Invention
In view of the above, there is a need to provide a bottom-surface-containing type connection coating and a preparation method thereof, so as to solve the technical problem in the prior art that a new coating is directly coated on the surface of an old coating, so that the old coating is loosened or poor in adhesion.
The first aspect of the invention provides a bottom surface containing type connecting coating, which comprises main paint and a curing agent; wherein the main paint consists of the following raw materials in percentage by weight: 15 to 25 percent of first solvent, 10 to 16 percent of chlorinated rubber, 0.2 to 0.8 percent of dispersant, 0.6 to 1 percent of hydrated magnesium silicate, 0.4 to 0.8 percent of fumed silica, 0.8 to 1.3 percent of polyamide wax slurry, 2 to 7 percent of pigment, 3 to 8 percent of zinc phosphate, 3 to 8 percent of sericite, 15 to 25 percent of silica micropowder, 12 to 23 percent of second solvent and 5 to 10 percent of liquid epoxy resin; the first solvent is formed by mixing xylene and an aromatic hydrocarbon solvent S-100A; the second solvent is formed by mixing isopropanol and an aromatic hydrocarbon solvent S-100A; in the first solvent and the second solvent, S-100A: xylene: 1-isopropyl alcohol: (0.5-0.7): (0.2-0.4).
The second aspect of the invention provides a preparation method of a bottom surface containing type connecting coating, and the preparation method of the main paint comprises the following steps:
s1, uniformly mixing a first solvent, chlorinated rubber, a dispersing agent, hydrous magnesium silicate, fumed silica, polyamide wax slurry, a pigment, zinc phosphate, sericite and silica micropowder, dispersing at a high speed, and grinding by a sand mill until the fineness is less than or equal to 50 mu m to obtain slurry A1;
s2, adding the liquid epoxy resin and the second solvent into the slurry A1, and uniformly stirring to obtain the main paint.
The preparation method of the bottom surface-containing type connection coating provided by the second aspect of the invention is used for obtaining the bottom surface-containing type connection coating provided by the first aspect of the invention.
Compared with the prior art, the invention has the beneficial effects that:
the bottom surface containing type connecting coating can be directly coated on an old single-component coating without bottom biting and old coating insolubility, can not be bitten or dissolved by an upper double-component finish paint, and has the advantages of simple and convenient construction, quick drying and short coating interval.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The first aspect of the invention provides a bottom surface containing type connecting coating, which comprises main paint and a curing agent; wherein the main paint consists of the following raw materials in percentage by weight: 15-25% of first solvent, 10-16% of chlorinated rubber, 0.2-0.8% of dispersant, 0.6-1% of hydrated magnesium silicate, 0.4-0.8% of fumed silica, 0.8-1.3% of polyamide wax slurry, 2-7% of pigment, 3-8% of zinc phosphate, 3-8% of sericite, 15-25% of silica micropowder, 12-23% of second solvent and 5-10% of liquid epoxy resin.
According to the invention, the chlorinated rubber is selected as the main resin base material, so that the chlorinated rubber has the advantages of good solubility and high drying speed, and meanwhile, the requirement on the dissolving capacity of the solvent is not high, the solvent with extremely strong solubility is not required to be selected, and the problems of biting and dissolving of an old single-component coating due to high solubility of the solvent are avoided.
According to the invention, a small amount of small molecular weight liquid epoxy resin is selected as a resin auxiliary base material and is mixed with a curing agent to form a cross-linked paint film, so that the two-way interlayer adhesion between the connecting paint and the primer and the finish paint is further increased, and the cross-linked paint film cannot be dissolved or bitten by the upper two-component finish paint. Meanwhile, the solvent and the diluent with weak dissolving power can be selected, and the old single-component coating is prevented from being bitten. In the present invention, the content of the liquid epoxy resin needs to be controlled. If the content of the liquid epoxy resin is too high, the lower layer will be bitten, and if the content of the liquid epoxy resin is too low, the lower layer will be bitten by the upper layer two-component coating. Further, the liquid epoxy resin accounted for 8% of the main paint.
Further, the first solvent is formed by mixing xylene and an aromatic hydrocarbon solvent S-100A; the second solvent is formed by mixing isopropanol and an aromatic hydrocarbon solvent S-100A. In the first solvent and the second solvent, S-100A: xylene: 1-isopropyl alcohol: (0.5-0.7): (0.2-0.4). The invention can improve the coating performance and avoid dissolving or biting the old coating by controlling the composition of the solvent in the proportion range.
Still further, the first solvent is a mixture of xylene and aromatic hydrocarbon solvent S-100A in a ratio of 1: (0.5-1) by mass ratio; the second solvent is prepared from isopropanol and aromatic hydrocarbon solvent S-100A according to the ratio of 1: (1.8-2.2) in mass ratio. According to the invention, the ratio of the xylene to the aromatic hydrocarbon solvent S-100A in the first solvent is controlled within the range, so that the chlorinated rubber can be dissolved on the premise of weaker dissolving power, the volatilization rate is higher, the compatibility of an old single-component coating is favorably improved, and the old layer is not undercut or dissolved. According to the invention, the proportion of isopropanol to aromatic hydrocarbon solvent S-100A in the second solvent is controlled within the range, so that the resin can be dissolved on the premise of weaker dissolving power, the viscosity of the system is adjusted, the volatilization rate is higher, and the old coating cannot be dissolved or bitten.
The invention can further improve the compatibility of the connecting coating to the old single-component coating by properly improving the pigment ratio, so that the old layer is not bitten or dissolved.
According to the invention, by adding the hydrous magnesium silicate, the hardness of a paint film can be improved, and meanwhile, the paint has good storage stability. According to the invention, by adding the silicon micropowder, the strength and hardness of the coating can be improved, the water absorption rate is reduced, and the corrosion resistance of the coating is improved; according to the invention, the corrosion resistance of the original coating and the damaged part is improved by adding a proper amount of zinc phosphate and sericite; according to the invention, the fumed silica and the polyamide wax slurry are selected as the anti-settling agent, so that the pigment and the filler can be prevented from settling, and the construction performance of the coating is improved.
Further, the chlorinated rubber is an aqueous phase chlorinated rubber. The invention does not limit the specific type of the selected chlorinated rubber by the aqueous phase method, and the skilled person can select the chlorinated rubber according to the actual situation. For example, the chlorinated rubber by the aqueous phase method may be CR-1, CR-2, CR-3, etc.
Further, the specific type of the selected dispersant is not limited in the present invention, and can be selected by those skilled in the art according to actual situations. For example, the dispersant may be one or more of BYK-161, BYK-162, BYK-163, and BYK-104S.
Further, the pigment is one or more of anatase white, carbon black, iron oxide red, iron oxide yellow and iron oxide green.
Further, the curing agent is cashew nut shell oil epoxy resin curing agent. By selecting the curing agent, the obtained bottom surface containing type connecting coating has the performance of quick and solid drying, the coating interval can be shortened, and the construction period is shortened. The invention does not limit the specific type of the cashew nut shell oil epoxy resin curing agent, and the skilled person can select the curing agent according to the actual situation. For example, the type of the curing agent may be cashew nut shell oil epoxy curing agent 1041, MD1050, MD2015, MD5020, etc., manufactured by Shanghai Meidong biomaterial, Inc.
Further, the mass ratio of the main paint to the curing agent is 1: (0.05-0.2), and further 1: 0.1.
Further, the bottom surface containing type connection coating also comprises a thinner. Further, the diluent is prepared from isopropanol and aromatic hydrocarbon solvent S-100A according to a ratio of 1: (1-4) in mass ratio. Preferably 1: 3.
Furthermore, the mass ratio of the main paint to the diluent is 1: (0.05-0.2), preferably 1: 0.1.
The second aspect of the invention provides a preparation method of a bottom surface containing type connecting coating, and the preparation method of the main paint comprises the following steps:
s1, uniformly mixing a first solvent, chlorinated rubber, a dispersing agent, hydrous magnesium silicate, fumed silica, polyamide wax slurry, a pigment, zinc phosphate, sericite and silica micropowder, dispersing at a high speed, and grinding by a sand mill until the fineness is less than or equal to 50 mu m to obtain slurry A1;
s2, adding the liquid epoxy resin and the second solvent into the slurry A1, and uniformly stirring to obtain the main paint.
The preparation method of the bottom surface-containing type connection coating provided by the second aspect of the invention is used for obtaining the bottom surface-containing type connection coating provided by the first aspect of the invention.
Further, the preparation method of the bottom surface containing type connecting coating comprises the following steps: mixing the main paint, the curing agent and the diluent to obtain the bottom surface contained connecting coating.
Example 1
The embodiment provides a preparation method of a bottom surface containing type connecting coating, which comprises the following steps:
(1) uniformly mixing xylene, an aromatic hydrocarbon solvent S-100A, water-phase chlorinated rubber, a dispersing agent, hydrated magnesium silicate, fumed silica, polyamide wax slurry, anatase titanium dioxide, carbon black, zinc phosphate, sericite and silica micropowder, dispersing at a high speed, and grinding by a sand mill until the fineness is less than or equal to 50 mu m to obtain slurry A1; and adding liquid epoxy resin, isopropanol and an aromatic hydrocarbon solvent S-100A into the slurry A1, and uniformly stirring to obtain the main paint.
(2) And uniformly mixing the main paint, the curing agent and the diluent according to the mass ratio of 1:0.1:0.1 to obtain the bottom surface containing type connecting coating. Wherein the diluent is prepared from isopropanol and an aromatic hydrocarbon solvent S-100A according to the weight ratio of 1:3, and the components are compounded according to the mass ratio.
Examples 2 to 3
The preparation methods of examples 2 to 3 and comparative examples 1 to 4 are completely the same as example 1, except that the contents of the specific components of the selected raw materials are not the same, as shown in table 1.
TABLE 1
Test group
The coatings obtained in examples 1 to 3 and comparative examples 1 to 4 were applied to the surfaces of different old coatings, and the results are shown in Table 2.
TABLE 2
As can be seen from Table 2, the phenomena of biting and dissolving the lower old paint film do not occur in the examples 1-3 and the comparative example 3, and the adhesion force with the substrate is reduced along with the biting or dissolving of the lower old paint film in the comparative examples 1, 2 and 4.
The coatings obtained in examples 1 to 3 and comparative examples 1 to 4 were dried for 12 hours and then coated with different coatings, and the results are shown in Table 3.
TABLE 3
As can be seen from Table 3, in examples 1 to 3 and comparative examples 1, 2 and 4, the two-component coating on the upper layer did not bite or dissolve, in comparative example 3, the two-component coating on the upper layer did not bite or dissolve, and the interlayer adhesion was also reduced.
As can be seen from tables 2 and 3, the coatings obtained in the embodiments 1 to 3 of the present invention do not have the phenomenon of bottom biting or dissolution when being matched with old alkyd coatings, epoxy ester coatings, chlorinated rubber coatings and acrylic coatings, are not bitten or dissolved by upper two-component coatings such as acrylic polyurethane coatings, fluorocarbon coatings and epoxy topcoat, and have good adhesion with the coatings. In comparative examples 1 to 4, the phenomena of undercut or dissolution of an old single-component coating or biting and dissolution of an upper-layer double-component coating occur, and the adhesive force is reduced.
The coatings obtained in examples 1 to 3 were sprayed on a tin plate after polishing, and performance tests were performed, and the results are shown in table 4.
TABLE 4
As can be seen from Table 4, the connecting coating obtained by the invention has good adhesive force, impact resistance and flexibility, and can be used as a primer.
Compared with the prior art, the invention has the beneficial effects that:
(1) when the coating is used, the original old single-component coating does not need to be processed, the residual effect can be continuously exerted, the integral coating can be directly carried out on the surface of the old coating when the old coating is partially damaged and needs to be maintained without bottom biting, the cost of manpower, material resources, working hours and the like for removing the old coating is reduced, the substrate processing time is saved, and the construction period is shortened;
(2) the coating has good compatibility with a surface layer, can be compatible with products such as acrylic polyurethane paint, fluorocarbon paint, epoxy paint, chlorinated rubber and acrylic paint, is not bitten or dissolved by the surface paint coating, and has good interlayer adhesion;
(3) the coating of the invention has simple construction, dry block and short coating interval.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. A bottom surface contained connecting coating comprises main paint and a curing agent; the paint is characterized in that the main paint consists of the following raw materials in percentage by weight: 15 to 25 percent of first solvent, 10 to 16 percent of chlorinated rubber, 0.2 to 0.8 percent of dispersant, 0.6 to 1 percent of hydrated magnesium silicate, 0.4 to 0.8 percent of fumed silica, 0.8 to 1.3 percent of polyamide wax slurry, 2 to 7 percent of pigment, 3 to 8 percent of zinc phosphate, 3 to 8 percent of sericite, 15 to 25 percent of silica micropowder, 12 to 23 percent of second solvent and 5 to 10 percent of liquid epoxy resin; the first solvent is formed by mixing xylene and an aromatic hydrocarbon solvent S-100A; the second solvent is formed by mixing isopropanol and an aromatic hydrocarbon solvent S-100A; of the first solvent and the second solvent, S-100A: xylene: 1-isopropyl alcohol: (0.5-0.7): (0.2-0.4).
2. The primer-compatible tie coat of claim 1, wherein the first solvent is a mixture of xylene and an aromatic solvent S-100A in a ratio of 1: (0.5-1) in mass ratio.
3. The substrate-compatible tie coat of claim 1, wherein the second solvent is selected from the group consisting of isopropyl alcohol and aromatic hydrocarbon solvent S-100A in a ratio of 1: (1.8-2.2) in mass ratio.
4. The bottom-compatible joint coating of claim 1, wherein the chlorinated rubber is an aqueous-phase chlorinated rubber.
5. The floor-compatible joint coating of claim 1, wherein the pigment is one or more of anatase white, carbon black, red iron oxide, yellow iron oxide, green iron oxide.
6. The primer-containing tie coat of claim 1, wherein the curing agent is cashew nut shell oil epoxy curing agent.
7. The floor-compatible joint coating of claim 1, further comprising a diluent.
8. The substrate-compatible tie coat of claim 7, wherein the diluent is prepared from isopropanol and an aromatic hydrocarbon solvent S-100A in a ratio of 1: (1-4) in mass ratio.
9. The preparation method of the bottom surface containing type connection coating as claimed in any one of claims 1 to 8, wherein the preparation method of the main paint comprises the following steps:
uniformly mixing a first solvent, chlorinated rubber, a dispersing agent, hydrous magnesium silicate, fumed silica, polyamide wax slurry, a pigment, zinc phosphate, sericite and silica micropowder, dispersing at a high speed, and grinding by a sand mill until the fineness is less than or equal to 50 mu m to obtain slurry A1;
and adding the liquid epoxy resin and a second solvent into the slurry A1, and uniformly stirring to obtain the main paint.
10. The method of preparing a substrate-compatible tie coat according to claim 9, wherein the method of preparing a substrate-compatible tie coat further comprises the steps of: mixing the main paint, the curing agent and the diluent to obtain the bottom surface contained connecting coating.
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| CN202110460590.6A CN113214708B (en) | 2021-04-27 | 2021-04-27 | Bottom surface containing type connecting coating and preparation method thereof |
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