CN113185875A - Fireproof coating and preparation method thereof - Google Patents
Fireproof coating and preparation method thereof Download PDFInfo
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- CN113185875A CN113185875A CN202110491301.9A CN202110491301A CN113185875A CN 113185875 A CN113185875 A CN 113185875A CN 202110491301 A CN202110491301 A CN 202110491301A CN 113185875 A CN113185875 A CN 113185875A
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- C09D131/00—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 an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Coating compositions based on derivatives of such polymers
- C09D131/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C09D131/04—Homopolymers or copolymers of vinyl acetate
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
- C09D5/185—Intumescent paints
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- 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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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
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- 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
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- 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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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/322—Ammonium phosphate
- C08K2003/323—Ammonium polyphosphate
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Abstract
The invention provides a fireproof coating which comprises the following components in parts by weight: 15-20 parts of titanium dioxide, 25-40 parts of film-forming emulsion, 10-15 parts of ammonium polyphosphate, 8-12 parts of pentaerythritol, 5-15 parts of melamine, 1-2 parts of expandable graphite, 0.1-0.5 part of defoaming agent, 0.5-1.0 part of dispersing agent, 0.5-1.0 part of thickening agent and 40-60 parts of water. The invention provides an intumescent fire-retardant coating with high thermal adhesive force, light weight, environmental protection and good fire-retardant effect and a preparation method thereof.
Description
Technical Field
The invention relates to the technical field of coatings, and particularly relates to a fireproof coating and a preparation method thereof.
Background
The fire-retardant coating, also called flame-retardant coating, is a generic name of coatings which are coated on flammable building materials such as timber, textile fiber, polymer products and the like or coated on the surfaces of objects such as cables, building matrix building materials and the like. The fireproof coating can block flame to enable the flame to be incapable of directly contacting with a substrate, so that the burning time of the substrate is delayed, the propagation speed of the flame on the surface of the substrate can be delayed, the fire hazard is prevented from being enlarged, the burning resistance time of the substrate can be prolonged, the time of structural damage is delayed, and the like, and the fireproof coating plays multiple roles of fireproof protection, corrosion resistance, rust resistance, acid and alkali resistance, smoke resistance and the like, has a decorative effect and cannot influence the attractiveness of materials.
The fireproof coating comprises a non-expansion type fireproof coating and an expansion type waterproof coating, the non-expansion type building matrix fireproof coating is generally thicker in coating, and the fireproof mechanism mainly comprises the following two functions: (1) inorganic heat-insulating materials such as perlite, vermiculite, sepiolite, fly ash and the like; inorganic fiber reinforced materials such as aluminum silicate fiber, ceramic fiber, glass fiber and the like have heat absorption effect of releasing water by thermal decomposition and heat transfer blocking effect of thermally decomposed solid residues; (2) at high temperatures, the inorganic adhesive materials in the fire-retardant coating, such as water glass, silica sol, aluminum phosphate salts, refractory cement, etc., decompose thermally to release inert gases and form a dense-structured glaze with good thermal insulation properties. The glaze can effectively prevent the inward transmission of heat and has the function of reflecting heat. The intumescent building matrix fireproof coating mainly comprises components such as base material emulsion (film-forming substance), an intumescent flame retardant system, inorganic filler, auxiliary agent and the like. Wherein, the expansion flame-retardant system comprises a dehydration catalyst, a carbon forming agent, a foaming agent and the like, and has a decisive effect on the esterification-expansion-carbonization process of the fireproof coating. The fire-proof mechanism of the intumescent fire-proof coating is as follows: the film-forming substance in the fireproof coating is heated to melt and soften, the catalytic dehydrating agent and the char-forming agent react to generate a viscous esterification product, the foaming agent is thermally decomposed to generate inert gas, so that a mixture of the molten film-forming substance and the viscous esterification product is expanded to form a compact fireproof heat-insulating layer, the expansion ratio can reach 10-100 times of the thickness of the coating, a heat-insulating barrier is formed between flame and a building matrix, the inward transfer of heat is slowed, and the fire-resistant time of the building matrix is prolonged. However, in the prior art, the adhesion performance of the film-forming substance of the intumescent fire retardant coating is reduced after the film-forming substance of the intumescent fire retardant coating is heated and softened, when the foaming agent generates gas to expand and swell the viscous esterification product, the adhesion of the fire retardant coating is reduced although the coating isolates flames, the heated fire retardant coating can be bent or even peeled off to reduce the fire retardant effect, and the falling of the fire retardant coating with high temperature can cause casualties and road obstruction in buildings.
Therefore, it is necessary to research an intumescent fire retardant coating with high thermal adhesion, light weight, environmental protection and good fire-retardant effect of an intumescent layer and a preparation method thereof.
Disclosure of Invention
The invention aims to provide an intumescent fire-retardant coating with high thermal adhesive force, light weight, environmental protection and good fire-retardant effect and a preparation method thereof.
The technical purpose of the invention is realized by the following technical scheme:
the fireproof coating comprises the following components in parts by weight: 15-20 parts of titanium dioxide, 25-40 parts of film-forming emulsion, 10-15 parts of ammonium polyphosphate, 8-12 parts of pentaerythritol, 5-15 parts of melamine, 1-2 parts of expandable graphite, 0.1-0.5 part of defoaming agent, 0.5-1.0 part of dispersing agent, 0.5-1.0 part of thickening agent and 40-60 parts of water.
As a further setting of the invention, the film-forming emulsion comprises the following components in parts by weight: 15-25 parts of acef emulsion and 8-10 parts of ethylene glycol dilaurate.
As a further setting of the invention, 2-5 parts of undecylenic alcohol is also included according to parts by weight.
As a further development of the invention, the defoamer is an NXZ defoamer or an AC40 defoamer.
As a further configuration of the invention, the dispersant is dispersant SN-5040.
As a further configuration of the present invention, the expandable graphite is a layered graphite compound formed by subjecting natural flaky graphite to sulfuric acid oxidation treatment.
As a further setting of the invention, the silver-carrying zeolite antibacterial agent also comprises 1-5 parts by weight of a silver-carrying zeolite antibacterial agent.
The invention also provides a preparation method of the fireproof coating, which comprises the following steps:
step S1: preparing a zeolite silver-loaded antibacterial agent: adding natural zeolite into silver nitrate solution, stirring, taking out suspension, filtering and drying to form the silver-loaded zeolite antibacterial agent;
step S2: preparing a film-forming emulsion: according to the weight part ratio, the acef-emulsion, ethylene glycol dilaurate and undecylenol are put into a stirring tank and stirred to form a film-forming emulsion;
step S3: preparing a fireproof coating: according to the weight portion ratio, firstly, water, ammonium polyphosphate, pentaerythritol, melamine, titanium dioxide, expandable graphite and a zeolite silver-loaded antibacterial agent are stirred and dispersed at a high speed, then, the film-forming emulsion is added into a stirring cylinder, the mixture is stirred and dispersed and then is filtered, then, a defoaming agent is added into the filtered coating for defoaming, and a thickening agent is added to adjust the viscosity to a proper value, so that the fireproof coating is obtained.
As a further setting of the invention, step S1 is to add natural zeolite into silver nitrate solution with concentration of 0.0526mol/L at concentration of 1g/10ml, and the stirring time is 30-60 min.
The invention has the beneficial effects that:
1. the fireproof coating adopts an ammonium polyphosphate, pentaerythritol and melamine expansion fireproof system, when the coating meets high temperature, the expansion system in the coating generates inert gas to ensure that the coating expands rapidly to form a heat insulation layer, and the heat conductivity coefficient is reduced to 0.02-0.05W (m.K)-1The thermal conductivity coefficient of the fire-proof material is close to that of air, and excellent fire-proof performance is exerted.
2. The film-forming emulsion of the fireproof coating adopts the vinyl acetate-tert-emulsion, the ethylene glycol dilaurate and the undecylenic alcohol, the vinyl acetate-tert-emulsion is a viscous fluid, the composite viscosity is low, the vinyl acetate-tert-emulsion is favorable for obtaining a larger expansion rate in the process of thermal expansion, the expansion height is high, a building matrix is isolated from a fire source far, so that the building matrix has good fireproof performance, and the inorganic flame-retardant filler TiO can be used for isolating an inorganic flame-retardant filler2And reaction product TiP thereof2O7The ethylene glycol dilaurate is added into the film-forming emulsion, has more branched chains and hydrogen bond active functional groups, can interact with the vinyl acetate-vinyl acetate emulsion, enhances the connection complexity of the film-forming emulsion, limits the relaxation and rotation of the vinyl acetate-vinyl acetate emulsion polymer chain to a certain extent, and blocks the mobilityThe shear viscosity of the compound is increased, and the adhesion of the coating to a building matrix in the fire source expansion process is effectively improved under the condition that the expansion rate is slightly reduced, so that the practical fireproof performance of the fireproof coating is improved.
3. The undecylenol is added into the film-forming emulsion of the fireproof coating, and can improve the dispersion uniformity of the vinyl acetate-tert-emulsion and the ethylene glycol dilaurate, improve the stability of the film-forming emulsion, improve the expansion uniformity of the fireproof coating during expansion, and improve the adhesiveness and the fireproof performance of the fireproof coating.
4. The zeolite silver-loaded antibacterial agent is added into the fireproof coating, nano silver ions can be released by the zeolite silver-loaded antibacterial agent at ordinary times, the antibacterial and bactericidal performance of the coating is realized, when a fire source is met, zeolite of the zeolite silver-loaded antibacterial agent can react with ammonium polyphosphate to generate silicon aluminum phosphate, the quantity of fireproof active substances of an expansion layer is increased, meanwhile, the zeolite can limit and reduce thermal decomposition of a polymer chain segment, the polymer chain segment is promoted to participate in carbonization, and the flame retardant performance of the coating is enhanced.
5. The expansible graphite in the fire-proof coating is a laminar graphite compound formed after sulfuric acid oxidation treatment, sulfuric acid molecules are intercalated between laminar graphite layers, and when the expansible stone ring expands and is subjected to high temperature, oxidation-reduction reaction is carried out between the sulfuric acid molecules in the intercalation and graphite carbon atoms to generate SO2、CO2And water vapor, release inert gas and water vapor, the scaly expansion becomes the vermicular structure of very low density, has improved the height of inflation layer, and form a good heat insulation layer, has improved fire retardant coating in thermal degradation, fire-retardant etc.'s performance apparently, and the vermicular inflation layer structure that forms also further provides local expansion pressure for fire retardant coating to adhere to the building base body, effectively improves fire retardant coating's adhesion property and fire behavior when meetting the conflagration.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
First, an embodiment
Example 1
The fireproof coating comprises the following components in parts by weight: 15 parts of titanium dioxide, 25 parts of film-forming emulsion, 10 parts of ammonium polyphosphate, 8 parts of pentaerythritol, 5 parts of melamine, 1 part of expandable graphite, 0.1 part of NXZ defoaming agent, SN-50400.5 parts of dispersing agent, 0.5 part of thickening agent, 40 parts of water and 1 part of zeolite silver-loaded antibacterial agent, wherein the film-forming emulsion comprises the following components in parts by weight: 15 parts of acef emulsion, 8 parts of ethylene glycol dilaurate and 2 parts of undecylenic alcohol.
As a further configuration of the present invention, the expandable graphite is a layered graphite compound formed by subjecting natural flaky graphite to sulfuric acid oxidation treatment.
The invention also provides a preparation method of the fireproof coating, which comprises the following steps:
step S1: preparing a zeolite silver-loaded antibacterial agent: adding natural zeolite with the concentration of 1g/10ml into silver nitrate solution with the concentration of 0.0526mol/L, stirring for 30min, taking out suspension, filtering and drying to form the zeolite silver-loaded antibacterial agent;
step S2: preparing a film-forming emulsion: according to the weight part ratio, the acef-emulsion, ethylene glycol dilaurate and undecylenol are put into a stirring tank and stirred to form a film-forming emulsion;
step S3: preparing a fireproof coating: according to the weight portion ratio, firstly, water, ammonium polyphosphate, pentaerythritol, melamine, titanium dioxide, expandable graphite and a zeolite silver-loaded antibacterial agent are stirred and dispersed at a high speed, then, the film-forming emulsion is added into a stirring cylinder, the mixture is stirred and dispersed and then is filtered, then, a defoaming agent is added into the filtered coating for defoaming, and a thickening agent is added to adjust the viscosity to a proper value, so that the fireproof coating is obtained.
Example 2
The fireproof coating comprises the following components in parts by weight: 20 parts of titanium dioxide, 40 parts of film-forming emulsion, 15 parts of ammonium polyphosphate, 12 parts of pentaerythritol, 15 parts of melamine, 2 parts of expandable graphite, 0.5 part of AC40 defoaming agent, SN-50401.0 parts of dispersing agent, 1.0 part of thickening agent, 60 parts of water and 5 parts of zeolite silver-loaded antibacterial agent, wherein the film-forming emulsion comprises the following components in parts by weight: 25 parts of acef emulsion, 10 parts of ethylene glycol dilaurate and 5 parts of undecylenic alcohol.
As a further configuration of the present invention, the expandable graphite is a layered graphite compound formed by subjecting natural flaky graphite to sulfuric acid oxidation treatment.
The invention also provides a preparation method of the fireproof coating, which comprises the following steps:
step S1: preparing a zeolite silver-loaded antibacterial agent: adding natural zeolite with the concentration of 1g/10ml into silver nitrate solution with the concentration of 0.0526mol/L, stirring for 60min, taking out suspension, filtering and drying to form the zeolite silver-loaded antibacterial agent;
step S2: preparing a film-forming emulsion: according to the weight part ratio, the acef-emulsion, ethylene glycol dilaurate and undecylenol are put into a stirring tank and stirred to form a film-forming emulsion;
step S3: preparing a fireproof coating: according to the weight portion ratio, firstly, water, ammonium polyphosphate, pentaerythritol, melamine, titanium dioxide, expandable graphite and a zeolite silver-loaded antibacterial agent are stirred and dispersed at a high speed, then, the film-forming emulsion is added into a stirring cylinder, the mixture is stirred and dispersed and then is filtered, then, a defoaming agent is added into the filtered coating for defoaming, and a thickening agent is added to adjust the viscosity to a proper value, so that the fireproof coating is obtained.
Example 3
The fireproof coating comprises the following components in parts by weight: 18 parts of titanium dioxide, 32 parts of film-forming emulsion, 12 parts of ammonium polyphosphate, 10 parts of pentaerythritol, 10 parts of melamine, 1.5 parts of expandable graphite, 0.3 part of NXZ defoaming agent, SN-50400.8 parts of dispersing agent, 0.8 part of thickening agent, 50 parts of water and 3 parts of zeolite silver-loaded antibacterial agent, wherein the film-forming emulsion comprises the following components in parts by weight: 20 parts of acef emulsion, 9 parts of ethylene glycol dilaurate and 3 parts of undecylenic alcohol.
As a further configuration of the present invention, the expandable graphite is a layered graphite compound formed by subjecting natural flaky graphite to sulfuric acid oxidation treatment.
The invention also provides a preparation method of the fireproof coating, which comprises the following steps:
step S1: preparing a zeolite silver-loaded antibacterial agent: adding natural zeolite with the concentration of 1g/10ml into silver nitrate solution with the concentration of 0.0526mol/L, stirring for 40min, taking out suspension, filtering and drying to form the zeolite silver-loaded antibacterial agent;
step S2: preparing a film-forming emulsion: according to the weight part ratio, the acef-emulsion, ethylene glycol dilaurate and undecylenol are put into a stirring tank and stirred to form a film-forming emulsion;
step S3: preparing a fireproof coating: according to the weight portion ratio, firstly, water, ammonium polyphosphate, pentaerythritol, melamine, titanium dioxide, expandable graphite and a zeolite silver-loaded antibacterial agent are stirred and dispersed at a high speed, then, the film-forming emulsion is added into a stirring cylinder, the mixture is stirred and dispersed and then is filtered, then, a defoaming agent is added into the filtered coating for defoaming, and a thickening agent is added to adjust the viscosity to a proper value, so that the fireproof coating is obtained.
Example 4
The fireproof coating comprises the following components in parts by weight: 18 parts of titanium dioxide, 32 parts of film-forming emulsion, 12 parts of ammonium polyphosphate, 10 parts of pentaerythritol, 10 parts of melamine, 1.5 parts of expandable graphite, 0.3 part of NXZ defoaming agent, SN-50400.8 parts of dispersing agent, 0.8 part of thickening agent and 50 parts of water, wherein the film-forming emulsion comprises the following components in parts by weight: 20 parts of acef emulsion, 9 parts of ethylene glycol dilaurate and 3 parts of undecylenic alcohol.
As a further configuration of the present invention, the expandable graphite is a layered graphite compound formed by subjecting natural flaky graphite to sulfuric acid oxidation treatment.
The invention also provides a preparation method of the fireproof coating, which comprises the following steps:
step S1: preparing a film-forming emulsion: according to the weight part ratio, the acef-emulsion, ethylene glycol dilaurate and undecylenol are put into a stirring tank and stirred to form a film-forming emulsion;
step S2: preparing a fireproof coating: according to the weight portion ratio, firstly stirring and dispersing water, ammonium polyphosphate, pentaerythritol, melamine, titanium dioxide and expandable graphite at a high speed, then adding the film-forming emulsion into a stirring cylinder, stirring and dispersing, filtering, adding a defoaming agent into the filtered coating for defoaming, and adding a thickening agent to adjust to a proper viscosity, thus obtaining the fireproof coating.
Example 5
The fireproof coating comprises the following components in parts by weight: 18 parts of titanium dioxide, 32 parts of film-forming emulsion, 12 parts of ammonium polyphosphate, 10 parts of pentaerythritol, 10 parts of melamine, 1.5 parts of expandable graphite, 0.3 part of NXZ defoaming agent, SN-50400.8 parts of dispersing agent, 0.8 part of thickening agent, 50 parts of water and 3 parts of zeolite silver-loaded antibacterial agent, wherein the film-forming emulsion comprises the following components in parts by weight: 20 parts of acetertiary emulsion and 3 parts of undecylenic alcohol.
As a further configuration of the present invention, the expandable graphite is a layered graphite compound formed by subjecting natural flaky graphite to sulfuric acid oxidation treatment.
The invention also provides a preparation method of the fireproof coating, which comprises the following steps:
step S1: preparing a zeolite silver-loaded antibacterial agent: adding natural zeolite with the concentration of 1g/10ml into silver nitrate solution with the concentration of 0.0526mol/L, stirring for 40min, taking out suspension, filtering and drying to form the zeolite silver-loaded antibacterial agent;
step S2: preparing a film-forming emulsion: according to the weight part ratio, the acetertiary emulsion and the undecylenic alcohol are put into a stirring tank and stirred to form a film-forming emulsion;
step S3: preparing a fireproof coating: according to the weight portion ratio, firstly, water, ammonium polyphosphate, pentaerythritol, melamine, titanium dioxide, expandable graphite and a zeolite silver-loaded antibacterial agent are stirred and dispersed at a high speed, then, the film-forming emulsion is added into a stirring cylinder, the mixture is stirred and dispersed and then is filtered, then, a defoaming agent is added into the filtered coating for defoaming, and a thickening agent is added to adjust the viscosity to a proper value, so that the fireproof coating is obtained.
Example 6
The fireproof coating comprises the following components in parts by weight: 18 parts of titanium dioxide, 32 parts of film-forming emulsion, 12 parts of ammonium polyphosphate, 10 parts of pentaerythritol, 10 parts of melamine, 1.5 parts of expandable graphite, 0.3 part of NXZ defoaming agent, SN-50400.8 parts of dispersing agent, 0.8 part of thickening agent, 50 parts of water and 3 parts of zeolite silver-loaded antibacterial agent, wherein the film-forming emulsion comprises the following components in parts by weight: 20 parts of acef emulsion and 9 parts of ethylene glycol dilaurate.
As a further configuration of the present invention, the expandable graphite is a layered graphite compound formed by subjecting natural flaky graphite to sulfuric acid oxidation treatment.
The invention also provides a preparation method of the fireproof coating, which comprises the following steps:
step S1: preparing a zeolite silver-loaded antibacterial agent: adding natural zeolite with the concentration of 1g/10ml into silver nitrate solution with the concentration of 0.0526mol/L, stirring for 40min, taking out suspension, filtering and drying to form the zeolite silver-loaded antibacterial agent;
step S2: preparing a film-forming emulsion: according to the weight part ratio, the acetertiary emulsion and the ethylene glycol dilaurate are put into a stirring cylinder and stirred to form a film-forming emulsion;
step S3: preparing a fireproof coating: according to the weight portion ratio, firstly, water, ammonium polyphosphate, pentaerythritol, melamine, titanium dioxide, expandable graphite and a zeolite silver-loaded antibacterial agent are stirred and dispersed at a high speed, then, the film-forming emulsion is added into a stirring cylinder, the mixture is stirred and dispersed and then is filtered, then, a defoaming agent is added into the filtered coating for defoaming, and a thickening agent is added to adjust the viscosity to a proper value, so that the fireproof coating is obtained.
Example 7
The fireproof coating comprises the following components in parts by weight: 18 parts of titanium dioxide, 32 parts of film-forming emulsion, 12 parts of ammonium polyphosphate, 10 parts of pentaerythritol, 10 parts of melamine, 0.3 part of NXZ defoaming agent, SN-50400.8 parts of dispersing agent, 0.8 part of thickening agent, 50 parts of water and 3 parts of zeolite silver-loaded antibacterial agent, wherein the film-forming emulsion comprises the following components in parts by weight: 20 parts of acef emulsion, 9 parts of ethylene glycol dilaurate and 3 parts of undecylenic alcohol.
As a further configuration of the present invention, the expandable graphite is a layered graphite compound formed by subjecting natural flaky graphite to sulfuric acid oxidation treatment.
The invention also provides a preparation method of the fireproof coating, which comprises the following steps:
step S1: preparing a zeolite silver-loaded antibacterial agent: adding natural zeolite with the concentration of 1g/10ml into silver nitrate solution with the concentration of 0.0526mol/L, stirring for 40min, taking out suspension, filtering and drying to form the zeolite silver-loaded antibacterial agent;
step S2: preparing a film-forming emulsion: according to the weight part ratio, the acef-emulsion, ethylene glycol dilaurate and undecylenol are put into a stirring tank and stirred to form a film-forming emulsion;
step S3: preparing a fireproof coating: according to the weight portion ratio, firstly stirring and dispersing water, ammonium polyphosphate, pentaerythritol, melamine, titanium dioxide and a zeolite silver-loaded antibacterial agent at a high speed, then adding a film-forming emulsion into a stirring cylinder, stirring and dispersing, filtering, adding a defoaming agent into the filtered coating for defoaming, and adding a thickening agent to adjust to a proper viscosity, thus obtaining the fireproof coating.
Example 8
The fireproof coating comprises the following components in parts by weight: 18 parts of titanium dioxide, 32 parts of film-forming emulsion, 12 parts of ammonium polyphosphate, 10 parts of pentaerythritol, 10 parts of melamine, 1.5 parts of expandable graphite, 0.3 part of NXZ defoaming agent, SN-50400.8 parts of dispersing agent, 0.8 part of thickening agent and 50 parts of water, wherein the film-forming emulsion comprises the following components in parts by weight: 20 parts of acef emulsion.
As a further configuration of the present invention, the expandable graphite is a layered graphite compound formed by subjecting natural flaky graphite to sulfuric acid oxidation treatment.
The invention also provides a preparation method of the fireproof coating, which comprises the following steps:
step S1: preparing a film-forming emulsion: according to the weight part ratio, the tertiary acetate emulsion is put into a stirring cylinder and stirred to form film-forming emulsion;
step S2: preparing a fireproof coating: according to the weight portion ratio, firstly stirring and dispersing water, ammonium polyphosphate, pentaerythritol, melamine, titanium dioxide and expandable graphite at a high speed, then adding the film-forming emulsion into a stirring cylinder, stirring and dispersing, filtering, adding a defoaming agent into the filtered coating for defoaming, and adding a thickening agent to adjust to a proper viscosity, thus obtaining the fireproof coating.
The coating samples of examples 1-7 are tested for the fireproof performance of the fireproof coating in case of fire for 30min by adopting a simulated large panel combustion method device built by a laboratory according to the requirements of GB1907-2002 'fireproof coating for steel structures' on the fireproof coating for indoor steel structures, and the adhesive force of the coating after being heated is measured by adopting a Baige method according to the provisions of GB/T9286-1998 'test for marking out colored paint and varnish paint films', and the results are shown in the following table 1:
TABLE 1 test results of fire resistance and adhesion of various samples
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION | Steel plate Back temperature (. degree. C.) | Expansion ratio | Adhesion force |
Example 1 | 204 | 35.4 | 5B |
Example 2 | 192 | 39.1 | 5B |
Example 3 | 199 | 37.6 | 5B |
Example 4 | 267 | 37.1 | 5B |
Example 5 | 202 | 38.2 | 3B |
Example 6 | 258 | 32.7 | 4B |
Example 7 | 277 | 29.7 | 3B |
Example 8 | 375 | 25.6 | 3B |
The principles and embodiments of the present invention are explained herein using specific examples, which are set forth only to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. A fire retardant coating is characterized in that: the paint comprises the following components in parts by weight: 15-20 parts of titanium dioxide, 25-40 parts of film-forming emulsion, 10-15 parts of ammonium polyphosphate, 8-12 parts of pentaerythritol, 5-15 parts of melamine, 1-2 parts of expandable graphite, 0.1-0.5 part of defoaming agent, 0.5-1.0 part of dispersing agent, 0.5-1.0 part of thickening agent and 40-60 parts of water.
2. A fire retardant coating according to claim 1, characterized in that: the film-forming emulsion comprises the following components in parts by weight: 15-25 parts of acef emulsion and 8-10 parts of ethylene glycol dilaurate.
3. A fire retardant coating according to claim 2, characterised in that: according to parts by weight, the composition also comprises 2-5 parts of undecylenic alcohol.
4. A fire retardant coating according to claim 1, characterized in that: the defoaming agent is an NXZ defoaming agent or an AC40 defoaming agent.
5. A fire retardant coating according to claim 1, characterized in that: the dispersant is SN-5040.
6. A fire retardant coating according to claim 1, characterized in that: the expandable graphite is a layered graphite compound formed by oxidizing natural flaky graphite by sulfuric acid.
7. A fire retardant coating according to claim 1, characterized in that: according to the weight portion, the silver-carrying zeolite antibacterial agent also comprises 1-5 portions.
8. A method for preparing a fire retardant coating according to claim 1, characterized in that: the method comprises the following steps:
step S1: preparing a zeolite silver-loaded antibacterial agent: adding natural zeolite into silver nitrate solution, stirring, taking out suspension, filtering and drying to form the silver-loaded zeolite antibacterial agent;
step S2: preparing a film-forming emulsion: according to the weight part ratio, the acef-emulsion, ethylene glycol dilaurate and undecylenol are put into a stirring tank and stirred to form a film-forming emulsion;
step S3: preparing a fireproof coating: according to the weight portion ratio, firstly, water, ammonium polyphosphate, pentaerythritol, melamine, titanium dioxide, expandable graphite and a zeolite silver-loaded antibacterial agent are stirred and dispersed at a high speed, then, the film-forming emulsion is added into a stirring cylinder, the mixture is stirred and dispersed and then is filtered, then, a defoaming agent is added into the filtered coating for defoaming, and a thickening agent is added to adjust the viscosity to a proper value, so that the fireproof coating is obtained.
9. A method for preparing a fire retardant coating according to claim 8, characterized in that: step S1 is to add natural zeolite with the concentration of 1g/10ml into silver nitrate solution with the concentration of 0.0526mol/L, and stir for 30-60 min.
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