CN112409861A - Acid and alkali resistant coating and preparation method and application thereof - Google Patents
Acid and alkali resistant coating and preparation method and application thereof Download PDFInfo
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- CN112409861A CN112409861A CN202011363131.8A CN202011363131A CN112409861A CN 112409861 A CN112409861 A CN 112409861A CN 202011363131 A CN202011363131 A CN 202011363131A CN 112409861 A CN112409861 A CN 112409861A
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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
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C09D127/18—Homopolymers or copolymers of tetrafluoroethene
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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
- C09D177/00—Coating compositions based on polyamides obtained by reactions forming a carboxylic amide link in the main chain; Coating compositions based on derivatives of such polymers
- C09D177/06—Polyamides derived from polyamines and polycarboxylic acids
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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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- 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
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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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
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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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
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
- C08K2003/3063—Magnesium sulfate
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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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/328—Phosphates of heavy metals
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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
- 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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Abstract
An acid and alkali resistant coating is characterized in that: the paint consists of 10-20 parts of PTFE, 10-20 parts of epoxy resin, 5-20 parts of polyhexamethylene sebacamide, 5-10 parts of amino silicone oil, 5-10 parts of methyl silicone oil, 2-5 parts of magnesium sulfate, 2-5 parts of zinc phosphate, 2-5 parts of barium sulfate, 1-2 parts of limestone, 1-2 parts of aluminum hydroxide, 1-2 parts of dicumyl peroxide, 5-10 parts of diluent and 0.5-5 parts of dispersing agent according to parts by weight, wherein the diluent is an inactive diluent, and the dispersing agent is fatty acid, aliphatic amide or ester. Compared with the prior art, the invention has the beneficial effects that: the surface of the die is coated with the acid-base resistant coating, so that the corrosion of the die is reduced, the service life of the die is prolonged, and the production cost is reduced.
Description
Technical Field
The invention relates to the field of coatings, in particular to an acid and alkali resistant coating and a preparation method and application thereof.
Background
In the rubber processing industry, mold forming is a common means, rubber products prepared by the mold can have different shapes according to the requirements of users, and the rubber product has the advantages of high yield, high precision and high efficiency. However, the mold is continuously used and exposed in the air for a long time, so that the problem of acid or alkali corrosion often occurs on the surface of the mold, the service life of the rubber mold is greatly reduced, the yield of rubber is reduced while the cost of the mold is increased, and the production cost is greatly improved.
Therefore, it is urgently needed to develop an acid and alkali resistant coating capable of being coated on the surface of a rubber mold to solve the problem that the mold is corroded and prolong the service life of the rubber mold.
Disclosure of Invention
In order to solve the problem that a mold is easy to corrode in the prior art, the invention provides an acid and alkali resistant coating and a preparation method and application thereof.
The scheme adopted by the invention is as follows:
an acid and alkali resistant coating comprises, by mass, 10-20 parts of PTFE, 10-20 parts of epoxy resin, 5-20 parts of polyhexamethylene sebacamide, 5-10 parts of amino silicone oil, 5-10 parts of methyl silicone oil, 2-5 parts of magnesium sulfate, 2-5 parts of zinc phosphate, 2-5 parts of barium sulfate, 1-2 parts of limestone, 1-2 parts of aluminum hydroxide, 1-2 parts of dicumyl peroxide, 5-10 parts of a diluent and 0.5-5 parts of a dispersing agent, wherein the diluent is an inactive diluent, and the dispersing agent is a fatty acid, an aliphatic amide or an ester.
As a preferred technical scheme of the invention, the non-reactive diluent comprises one of cyclohexanone, toluene, xylene or styrene.
In a preferred embodiment of the present invention, the fatty acid includes one of polyoxyethylene fatty acid, fatty acid zinc, and fatty acid methyl ester sodium sulfonate.
As a preferred technical solution of the present invention, the aliphatic amide includes one of hexenyl bis stearamide, oleamide, polyacrylamide or isopropanolamide.
In a preferred embodiment of the present invention, the ester includes one of butyl stearate, glyceryl monostearate, glyceryl tristearate, polyoxyethylene fatty acid ester, and sorbitan fatty acid ester.
As a preferable technical scheme of the invention, the diluent is dimethylbenzene, and the dispersant is stearic acid monoglyceride.
The preparation method of the acid and alkali resistant coating comprises the following steps:
A. 10-20 parts of PTFE, 10-20 parts of epoxy resin, 5-20 parts of polyhexamethylene sebacamide, 5-10 parts of amino silicone oil, 5-10 parts of methyl silicone oil, 1-2 parts of dicumyl peroxide, 5-10 parts of diluent and 0.5-5 parts of dispersant are stirred and dispersed at high speed at room temperature, the stirring speed is 400-;
B. adding 2-5 parts by mass of magnesium sulfate, 2-5 parts by mass of zinc phosphate, 2-5 parts by mass of barium sulfate, 1-2 parts by mass of limestone and 1-2 parts by mass of aluminum hydroxide into the mixed slurry obtained in the step A, and continuously stirring at the stirring speed of 600-1500 rpm for 1-5 hours;
C. grinding the mixed slurry obtained in the step B for 1-3 hours at the rotating speed of 4000-6000 rpm, wherein the used equipment is a colloid mill;
D. c, transferring the slurry which is obtained in the step C and is dispersed, ground and uniformly mixed into a vacuum degassing device, removing air bubbles in the slurry to ensure the uniformity of the slurry, and standing for 6-24 hours at room temperature;
E. and D, collecting the slurry obtained in the step D into a container, and sealing and storing to obtain the acid and alkali resistant coating.
In a preferred embodiment of the present invention, the slurry is heated at a temperature of 30 to 80 ℃ during the high-speed stirring and dispersing in step A.
In a preferred embodiment of the present invention, the slurry is heated at a temperature of 20 to 60 ℃ while stirring in step B.
An application of acid-alkali resistant paint in rubber mould.
Compared with the prior art, the invention has the beneficial effects that: the surface of the die is coated with the acid-base resistant coating, so that the corrosion of the die is reduced, the service life of the die is prolonged, and the production cost is reduced.
Detailed Description
The present invention is further described with reference to the following examples, which are provided for illustration only and are not to be construed as limiting the scope of the claims, and other alternatives which may occur to those skilled in the art are also within the scope of the claims.
Example 1
An acid and alkali resistant coating comprises, by mass, 10 parts of PTFE, 10 parts of epoxy resin, 5 parts of polyhexamethylene sebacamide, 5 parts of amino silicone oil, 5 parts of methyl silicone oil, 2 parts of magnesium sulfate, 2 parts of zinc phosphate, 2 parts of barium sulfate, 1 part of limestone, 1 part of aluminum hydroxide, 1 part of dicumyl peroxide, 5 parts of a diluent and 0.5 part of a dispersing agent, wherein the diluent is an inactive diluent.
Specifically, the diluent is xylene, and the dispersant is stearic acid monoglyceride.
The preparation method of the acid and alkali resistant coating comprises the following steps:
A. stirring and dispersing 10 parts of PTFE, 10 parts of epoxy resin, 5 parts of polyhexamethylene sebacamide, 5 parts of amino silicone oil, 5 parts of methyl silicone oil, 1 part of dicumyl peroxide, 5 parts of diluent and 0.5 part of dispersing agent at high speed at room temperature, wherein the stirring speed is 400 revolutions per minute, and the stirring time is 0.5 hour;
B. adding 2 parts by mass of magnesium sulfate, 2 parts by mass of zinc phosphate, 2 parts by mass of barium sulfate, 1 part by mass of limestone and 1 part by mass of aluminum hydroxide into the mixed slurry obtained in the step A, and continuously stirring at the stirring speed of 600 revolutions per minute for 1 hour;
C. b, grinding the mixed slurry obtained in the step B for 1 hour at the rotating speed of 4000 revolutions per minute, wherein the used equipment is a colloid mill;
D. c, transferring the slurry which is obtained in the step C and is dispersed, ground and uniformly mixed into a vacuum degassing device, removing bubbles in the slurry to ensure the uniformity of the slurry, and standing for 6 hours at room temperature;
E. and D, collecting the slurry obtained in the step D into a container, and sealing and storing to obtain the acid and alkali resistant coating.
Specifically, when the high-speed stirring dispersion described in step a is performed, the slurry is heated at a temperature of 30 ℃.
Specifically, while stirring as described in step B, the slurry was heated at a temperature of 20 ℃.
The acid and alkali resistant paint is applied to rubber molds.
Example 2
An acid and alkali resistant coating comprises, by mass, 20 parts of PTFE, 20 parts of epoxy resin, 20 parts of polyhexamethylene sebacamide, 10 parts of amino silicone oil, 10 parts of methyl silicone oil, 5 parts of magnesium sulfate, 5 parts of zinc phosphate, 5 parts of barium sulfate, 2 parts of limestone, 2 parts of aluminum hydroxide, 1-2 parts of dicumyl peroxide, 10 parts of a diluent and 5 parts of a dispersing agent, wherein the diluent is an inactive diluent.
Specifically, the non-reactive diluent is cyclohexanone.
Specifically, the dispersing agent is polyoxyethylene fatty acid.
The preparation method of the acid and alkali resistant coating comprises the following steps:
A. according to the mass portion ratio, 20 portions of PTFE, 20 portions of epoxy resin, 20 portions of polyhexamethylene sebacamide, 10 portions of amino silicone oil, 10 portions of methyl silicone oil, 2 portions of dicumyl peroxide, 10 portions of diluent and 5 portions of dispersant are stirred and dispersed at high speed at room temperature, the stirring speed is 600 revolutions per minute, and the stirring time is 3 hours;
B. adding 5 parts by mass of magnesium sulfate, 5 parts by mass of zinc phosphate, 5 parts by mass of barium sulfate, 2 parts by mass of limestone and 2 parts by mass of aluminum hydroxide into the mixed slurry obtained in the step A, and continuously stirring at the stirring speed of 1500 revolutions per minute for 5 hours;
C. grinding the mixed slurry obtained in the step B for 3 hours at the rotating speed of 6000 revolutions per minute, wherein the used equipment is a colloid mill;
D. c, transferring the slurry which is obtained in the step C and is dispersed, ground and uniformly mixed into a vacuum degassing device, removing air bubbles in the slurry to ensure the uniformity of the slurry, and standing for 24 hours at room temperature;
E. and D, collecting the slurry obtained in the step D into a container, and sealing and storing to obtain the acid and alkali resistant coating.
Specifically, when the high-speed stirring dispersion described in step a is performed, the slurry is heated at a heating temperature of 80 ℃.
Specifically, while stirring in step B, the slurry was heated to a heating temperature of 60 ℃.
The acid and alkali resistant paint is applied to rubber molds.
Example 3
An acid and alkali resistant coating comprises, by mass, 15 parts of PTFE, 15 parts of epoxy resin, 10 parts of polyhexamethylene sebacamide, 8 parts of amino silicone oil, 8 parts of methyl silicone oil, 3 parts of magnesium sulfate, 3 parts of zinc phosphate, 3 parts of barium sulfate, 1.5 parts of limestone, 1.5 parts of aluminum hydroxide, 1.5 parts of dicumyl peroxide, 8 parts of a diluent and 3 parts of a dispersing agent, wherein the diluent is an inactive diluent, and the dispersing agent is a fatty acid, an aliphatic amide or an ester.
Specifically, the non-reactive diluent comprises one of cyclohexanone, toluene, xylene or styrene.
Specifically, the fatty acid comprises one of polyoxyethylene fatty acid, fatty acid zinc or fatty acid methyl ester sodium sulfonate.
Specifically, the aliphatic amide comprises one of hexenyl bis stearamide, oleamide, polyacrylamide or isopropanolamide.
Specifically, the ester comprises one of butyl stearate, glyceryl monostearate, glyceryl tristearate, polyoxyethylene fatty acid ester or sorbitan fatty acid ester.
The preparation method of the acid and alkali resistant coating comprises the following steps:
A. stirring and dispersing 15 parts of PTFE, 15 parts of epoxy resin, 10 parts of polyhexamethylene sebacamide, 8 parts of amino silicone oil, 8 parts of methyl silicone oil, 1.5 parts of dicumyl peroxide, 8 parts of diluent and 3 parts of dispersing agent at high speed at room temperature, wherein the stirring speed is 500 revolutions per minute, and the stirring time is 2 hours;
B. adding 3 parts by mass of magnesium sulfate, 3 parts by mass of zinc phosphate, 3 parts by mass of barium sulfate, 1.5 parts by mass of limestone and 1.5 parts by mass of aluminum hydroxide into the mixed slurry obtained in the step A, and continuously stirring the mixture at the stirring speed of 1000 revolutions per minute for 3 hours;
C. b, grinding the mixed slurry obtained in the step B for 2 hours at the rotating speed of 5000 revolutions per minute, wherein the used equipment is a colloid mill;
D. c, transferring the slurry which is obtained in the step C and is dispersed, ground and uniformly mixed into a vacuum degassing device, removing bubbles in the slurry to ensure the uniformity of the slurry, and standing for 12 hours at room temperature;
E. and D, collecting the slurry obtained in the step D into a container, and sealing and storing to obtain the acid and alkali resistant coating.
Specifically, when the high-speed stirring dispersion described in step a is performed, the slurry is heated at 50 ℃.
Specifically, while stirring in step B, the slurry was heated to a temperature of 40 ℃.
The acid and alkali resistant paint is applied to rubber molds.
Example 4
An acid and alkali resistant coating comprises, by mass, 10 parts of PTFE, 20 parts of epoxy resin, 5 parts of polyhexamethylene sebacamide, 5 parts of amino silicone oil, 10 parts of methyl silicone oil, 3 parts of magnesium sulfate, 3 parts of zinc phosphate, 2 parts of barium sulfate, 2 parts of limestone, 1 part of aluminum hydroxide, 2 parts of dicumyl peroxide, 10 parts of a diluent and 5 parts of a dispersing agent, wherein the diluent is an inactive diluent.
In particular, the non-reactive diluent is toluene.
Specifically, the dispersant is a monoglyceride of stearic acid.
The preparation method of the acid and alkali resistant coating comprises the following steps:
A. stirring and dispersing 15 parts of PTFE, 20 parts of epoxy resin, 15 parts of polyhexamethylene sebacamide, 7 parts of amino silicone oil, 6 parts of methyl silicone oil, 1.2 parts of dicumyl peroxide, 6 parts of diluent and 2 parts of dispersing agent at high speed at room temperature, wherein the stirring speed is 460 revolutions per minute, and the stirring time is 1.5 hours;
B. adding 2.5 parts by mass of magnesium sulfate, 2.5 parts by mass of zinc phosphate, 3 parts by mass of barium sulfate, 1 part by mass of limestone and 2 parts by mass of aluminum hydroxide into the mixed slurry obtained in the step A, and continuously stirring at the stirring speed of 700 revolutions per minute for 2 hours;
C. grinding the mixed slurry obtained in the step B for 1.5 hours at the rotating speed of 4000 revolutions per minute, wherein the used equipment is a colloid mill;
D. c, transferring the slurry which is obtained in the step C and is dispersed, ground and uniformly mixed into a vacuum degassing device, removing bubbles in the slurry to ensure the uniformity of the slurry, and standing for 7 hours at room temperature;
E. and D, collecting the slurry obtained in the step D into a container, and sealing and storing to obtain the acid and alkali resistant coating.
Specifically, when the high-speed stirring dispersion described in step a is performed, the slurry is heated at a temperature of 40 ℃.
Specifically, while stirring in step B, the slurry was heated to a temperature of 40 ℃.
The acid and alkali resistant paint is applied to rubber molds.
Example 5
An acid and alkali resistant coating comprises, by mass, 12 parts of PTFE, 20 parts of epoxy resin, 14 parts of polyhexamethylene sebacamide, 7 parts of amino silicone oil, 6 parts of methyl silicone oil, 3 parts of magnesium sulfate, 3 parts of zinc phosphate, 4 parts of barium sulfate, 2 parts of limestone, 1 part of aluminum hydroxide, 1 part of dicumyl peroxide, 6 parts of a diluent and 2 parts of a dispersing agent, wherein the diluent is an inactive diluent.
Specifically, the non-reactive diluent is cyclohexanone.
Specifically, the dispersing agent is polyoxyethylene fatty acid.
The preparation method of the acid and alkali resistant coating comprises the following steps:
A. stirring and dispersing 12 parts of PTFE, 20 parts of epoxy resin, 14 parts of polyhexamethylene sebacamide, 7 parts of amino silicone oil, 6 parts of methyl silicone oil, 1 part of dicumyl peroxide, 6 parts of diluent and 2 parts of dispersing agent at high speed at room temperature, wherein the stirring speed is 450 revolutions per minute, and the stirring time is 1 hour;
B. adding 3 parts by mass of magnesium sulfate, 3 parts by mass of zinc phosphate, 4 parts by mass of barium sulfate, 2 parts by mass of limestone and 1 part by mass of aluminum hydroxide into the mixed slurry obtained in the step A, and continuously stirring at the stirring speed of 1200 rpm for 4 hours;
C. grinding the mixed slurry obtained in the step B for 3 hours at the rotating speed of 4500 rpm, wherein the used equipment is a colloid mill;
D. c, transferring the slurry which is obtained in the step C and is dispersed, ground and uniformly mixed into a vacuum degassing device, removing bubbles in the slurry to ensure the uniformity of the slurry, and standing for 6 hours at room temperature;
E. and D, collecting the slurry obtained in the step D into a container, and sealing and storing to obtain the acid and alkali resistant coating.
Specifically, when the high-speed stirring dispersion described in step a is performed, the slurry is heated at a temperature of 40 ℃.
Specifically, while stirring in step B, the slurry was heated at a heating temperature of 50 ℃.
The acid and alkali resistant paint is applied to rubber molds.
In order to characterize the acid and alkali resistance of examples 1 to 5, 2 parts of each of the coatings prepared in examples 1 to 5 was coated on the surface of the same rubber mold to obtain 10 rubber molds coated with different coatings. A 5% sodium hydroxide solution and a 5% dilute sulfuric acid solution were prepared, and 2 pieces of each example were placed in the sodium hydroxide and dilute sulfuric acid solutions, respectively. The two solutions were placed in an incubator at 25 ℃ and observed every 12 hours for blistering of the coating, and the phenomena obtained are reported in Table 1.
TABLE 1 results of whether the acid-base solutions of examples 1-5 soaked in foam or not
The results in table 1 show that the acid and alkali resistant coating prepared has good acid and alkali resistance.
The above examples are merely illustrative for clarity and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. An acid and alkali resistant coating is characterized in that: the paint consists of 10-20 parts of PTFE, 10-20 parts of epoxy resin, 5-20 parts of polyhexamethylene sebacamide, 5-10 parts of amino silicone oil, 5-10 parts of methyl silicone oil, 2-5 parts of magnesium sulfate, 2-5 parts of zinc phosphate, 2-5 parts of barium sulfate, 1-2 parts of limestone, 1-2 parts of aluminum hydroxide, 1-2 parts of dicumyl peroxide, 5-10 parts of diluent and 0.5-5 parts of dispersing agent according to parts by weight, wherein the diluent is an inactive diluent, and the dispersing agent is fatty acid, aliphatic amide or ester.
2. The acid and alkali resistant coating of claim 1, wherein: the non-reactive diluent comprises one of cyclohexanone, toluene, xylene or styrene.
3. The acid and alkali resistant coating of claim 1, wherein: the fatty acid comprises one of polyoxyethylene fatty acid, fatty acid zinc or fatty acid methyl ester sodium sulfonate.
4. The acid and alkali resistant coating of claim 1, wherein: the aliphatic amide comprises one of hexenyl bis stearamide, oleamide, polyacrylamide or isopropanol amide.
5. The acid and alkali resistant coating of claim 1, wherein: the ester comprises one of butyl stearate, glyceryl monostearate, glyceryl tristearate, polyoxyethylene fatty acid ester or sorbitan fatty acid ester.
6. The acid and alkali resistant coating of claim 1, wherein: the diluent is dimethylbenzene, and the dispersant is stearic acid monoglyceride.
7. The preparation method of the acid and alkali resistant coating of claim 1, which is characterized in that: the method comprises the following steps:
A. 10-20 parts of PTFE, 10-20 parts of epoxy resin, 5-20 parts of polyhexamethylene sebacamide, 5-10 parts of amino silicone oil, 5-10 parts of methyl silicone oil, 1-2 parts of dicumyl peroxide, 5-10 parts of diluent and 0.5-5 parts of dispersant are stirred and dispersed at high speed at room temperature, the stirring speed is 400-;
B. adding 2-5 parts by mass of magnesium sulfate, 2-5 parts by mass of zinc phosphate, 2-5 parts by mass of barium sulfate, 1-2 parts by mass of limestone and 1-2 parts by mass of aluminum hydroxide into the mixed slurry obtained in the step A, and continuously stirring at the stirring speed of 600-1500 rpm for 1-5 hours;
C. grinding the mixed slurry obtained in the step B for 1-3 hours at the rotating speed of 4000-6000 rpm, wherein the used equipment is a colloid mill;
D. c, transferring the slurry which is obtained in the step C and is dispersed, ground and uniformly mixed into a vacuum degassing device, removing air bubbles in the slurry to ensure the uniformity of the slurry, and standing for 6-24 hours at room temperature;
E. and D, collecting the slurry obtained in the step D into a container, and sealing and storing to obtain the acid and alkali resistant coating.
8. The method for preparing acid and alkali resistant coating according to claim 7, characterized in that: and B, heating the slurry at the heating temperature of 30-80 ℃ while stirring and dispersing at a high speed in the step A.
9. The method for preparing acid and alkali resistant coating according to claim 7, characterized in that: and B, heating the slurry at the heating temperature of 20-60 ℃ while stirring.
10. The use of the acid and alkali resistant coating of claim 1 in rubber molds.
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| CN202011363131.8A CN112409861A (en) | 2020-11-28 | 2020-11-28 | Acid and alkali resistant coating and preparation method and application thereof |
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| CN202011363131.8A CN112409861A (en) | 2020-11-28 | 2020-11-28 | Acid and alkali resistant coating and preparation method and application thereof |
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2020
- 2020-11-28 CN CN202011363131.8A patent/CN112409861A/en active Pending
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Application publication date: 20210226 |