CN111662624A - Fireproof coating and preparation method thereof - Google Patents
Fireproof coating and preparation method thereof Download PDFInfo
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- CN111662624A CN111662624A CN202010517382.0A CN202010517382A CN111662624A CN 111662624 A CN111662624 A CN 111662624A CN 202010517382 A CN202010517382 A CN 202010517382A CN 111662624 A CN111662624 A CN 111662624A
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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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
- C09D5/18—Fireproof paints including high temperature resistant 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
- C09D7/80—Processes for incorporating ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/322—Ammonium phosphate
- C08K2003/323—Ammonium polyphosphate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Abstract
The application relates to a coating, and provides a fireproof coating and a preparation method thereof. The fireproof coating provided by the application comprises 65-79% of polycarbonate polyurethane emulsion, 0.5-1.5% of wetting dispersant, 0.5-2.0% of defoaming agent, 0.5-1.5% of polyurethane thickener, 0.1-0.3% of cellulose thickener, 0.5-1% of wetting leveling agent, 0.2-0.5% of adhesion promoter, 0-1.5% of extinction powder, 0.3-0.8% of anti-settling auxiliary agent, 3-7% of film-forming auxiliary agent, 0.2-0.5% of sterilization mildew preventive, 11-20% of flame retardant and 1-13% of water, wherein the total weight of the fireproof coating is 100%; wherein the adhesion promoter is selected to be free of polysiloxane-free nonionic compounds. The fireproof coating has good dispersibility, storage performance and rheological property, and a paint film formed by the fireproof coating is flat and smooth, and has excellent adhesive force, good flame retardant property, strong wrapping property, high hardness and good chemical resistance.
Description
Technical Field
The application belongs to the technical field of coatings, and particularly relates to a fireproof coating and a preparation method thereof.
Background
The fire disaster is one of the most serious disasters in the society, most of materials for home decoration belong to wood products and PVC plastic plates, and the materials are flammable, so the requirement of the home coating market on the fireproof coating is large. However, the existing fire-retardant coating has poor universality, is often only suitable for a single substrate, and is often brushed on an oily coating of the substrate, so that the problem of poor adhesion is easily caused when the polarity difference between the fire-retardant coating and the substrate is large.
Disclosure of Invention
The application aims to provide a fireproof coating and a preparation method thereof, and aims to solve the problem that the existing fireproof coating is poor in universality and only suitable for a single substrate.
In order to achieve the purpose of the application, the technical scheme adopted by the application is as follows:
in a first aspect, the present application provides a fire retardant coating, which comprises the following components in percentage by weight, based on the total weight of the fire retardant coating as 100%:
wherein, the adhesion promoter is selected to be free of polysiloxane nonionic compounds.
In a second aspect, the present application provides a method for preparing a fire retardant coating, comprising the steps of:
weighing 65-79% of polycarbonate polyurethane emulsion, 0.5-1.5% of wetting dispersant, 0.5-2.0% of defoaming agent, 0.5-1.5% of polyurethane thickener, 0.1-0.3% of cellulose thickener, 0.5-1% of wetting leveling agent, 0.2-0.5% of adhesion promoter, 0-1.5% of extinction powder, 0.3-0.8% of anti-settling additive, 3-7% of film-forming additive, 0.2-0.5% of sterilization mildew inhibitor, 11-20% of flame retardant and 1-13% of water, wherein the total weight of the fireproof coating is 100%; wherein the adhesion promoter is selected to be free of polysiloxane-free nonionic compounds;
mixing the polycarbonate polyurethane emulsion, the wetting dispersant, the defoamer, the polyurethane thickener, the cellulose thickener, the wetting leveling agent, the adhesion promoter, the matting powder, the anti-settling auxiliary agent, the film-forming auxiliary agent, the sterilization mildew preventive, 11-20% of the flame retardant and the water.
The fireproof coating provided by the first aspect of the application comprises a polycarbonate polyurethane emulsion, a wetting dispersant, a defoaming agent, a polyurethane thickener, a cellulose thickener, a wetting leveling agent, an adhesion promoter, matting powder, an anti-settling additive, a film-forming additive, a sterilization mildew preventive and a flame retardant in specific weight percentage, and under the synergistic action of the components, the fireproof coating is endowed with good dispersibility, storage performance and rheological property, and a paint film formed by the fireproof coating is flat and smooth, excellent in adhesion, good in flame retardant property, strong in wrapping property, high in hardness and good in chemical resistance. Compared with the prior art, the fireproof coating provided by the embodiment of the application is suitable for various substrates, and both a wood substrate, an oily coating, a PVC plastic substrate or a metal substrate have excellent adhesive force, so that the defect that the existing fireproof coating is only suitable for a single substrate is overcome, the fireproof coating is good in flame retardance, and can be used as a fireproof coating with good fireproof performance and adhesive force. .
According to the preparation method of the fireproof coating provided by the second aspect of the application, all components in the formula are mixed, the method is simple, the operation is simple and convenient, the fireproof coating prepared by the method provided by the embodiment of the application has good dispersibility, storage performance and rheological property, and a paint film formed by the fireproof coating is flat and smooth, excellent in adhesive force, good in flame retardant property, strong in wrapping property, high in hardness and good in chemical resistance.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application more clearly apparent, the present application is further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The weight of the related components mentioned in the description of the embodiments of the present application may not only refer to the specific content of each component, but also represent the proportional relationship of the weight among the components, and therefore, the content of the related components is scaled up or down within the scope disclosed in the description of the embodiments of the present application as long as it is scaled up or down according to the description of the embodiments of the present application. Specifically, the mass described in the specification of the embodiments of the present application may be a mass unit known in the chemical industry field such as μ g, mg, g, kg, etc.
According to a first aspect of the embodiments of the present application, there is provided a fire retardant coating, which comprises the following components in percentage by weight, based on 100% of the total weight of the fire retardant coating:
wherein, the adhesion promoter is selected to be free of polysiloxane nonionic compounds.
The fireproof coating provided by the embodiment of the application comprises a polycarbonate polyurethane emulsion, a wetting dispersant, a defoaming agent, a polyurethane thickener, a cellulose thickener, a wetting leveling agent, an adhesion promoter, matting powder, an anti-settling additive, a film-forming additive, a sterilization mildew preventive and a flame retardant in specific weight percentage, and under the synergistic action of the components, the fireproof coating is endowed with good dispersibility, storage performance and rheological property, and a paint film formed by the fireproof coating is flat and smooth, excellent in adhesion, good in flame retardant property, strong in wrapping property, high in hardness and good in chemical resistance. Compared with the prior art, the fireproof coating provided by the embodiment of the application is suitable for various substrates, and both a wood substrate, an oily coating, a PVC plastic substrate or a metal substrate have excellent adhesive force, so that the defect that the existing fireproof coating is only suitable for a single substrate is overcome, the fireproof coating is good in flame retardance, and can be used as a fireproof coating with good fireproof performance and adhesive force.
Specifically, the polycarbonate polyurethane emulsion is used as a film forming material of the coating, and influences the film forming property of a paint film. The polycarbonate polyurethane emulsion can be formed into a film at a low temperature, the pigment and filler has high bearing performance and certain adhesive force, and the formed paint film has strong wrapping performance, high hardness and good chemical resistance.
In the examples herein, the polycarbonate polyurethane emulsion is 65% to 79%, and in specific examples 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, or 79%, based on the total weight of the coating taken as 100%.
The wetting dispersant is used for adjusting the dispersing performance of each component in the coating, in some embodiments, the wetting dispersant is at least one selected from polyether modified siloxane and high molecular weight block copolymer containing pigment affinity groups, and the selected materials have excellent powder wetting dispersibility and are beneficial to improving the powder dispersibility and the storage stability of the coating. In particular embodiments, the wetting dispersant is purchased from bike, digao, or china. In the examples of the present application, the wetting dispersant is 0.5% to 1.5%, and in specific examples, the wetting dispersant is 0.5%, 0.7%, 0.9%, 1.0%, 1.2%, 1.3%, 1.4%, or 1.5%, based on 100% by weight of the total coating material.
The defoaming agent is used for eliminating air bubbles in the coating, and in some embodiments, the defoaming agent is selected from at least one of silicon dioxide, foam breaking polysiloxane and polyether siloxane, preferably a mixture formed by dissolving the silicon dioxide and the foam breaking polysiloxane in polyethylene glycol and the polyether siloxane. The selected material has the advantages of no influence on the transparency and the luster of the paint film, excellent defoaming effect, capability of greatly reducing bubbles generated in the production and construction processes and improvement on the performance of the paint film. In specific examples, the defoamer is available from bike or dike. In the examples herein, the defoamer is 0.5% to 2.0%, and in specific examples 0.5%, 0.7%, 0.9%, 1.0%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, or 2.0%, based on the total weight of the coating material taken as 100%.
The polyurethane thickener is used for increasing the viscosity of the paint and keeping the filler in a uniform and stable suspension state, in some embodiments, the polyurethane thickener is selected from nonionic solvent-free hydrophobically modified polyurethane (the English name is HEUR), and the selected material has good thickening efficiency and leveling property and certain pigment and filler suspension property. In one embodiment, the polyurethane thickener is selected from the group consisting of RomenHasa leishunTMRM-12W. In the examples herein, the polyurethane thickener is 0.5% to 1.5%, and in specific examples 0.5%, 0.7%, 0.9%, 1.0%, 1.2%, 1.3%, 1.4%, or 1.5%, based on the total weight of the coating material taken as 100%.
The cellulose thickener has the functions of thickening and water retention, and is used for adjusting the rheological property of the paint so as to improve the construction performance and the effect. In some embodiments, the cellulose is selected to be a low molecular weight cellulose which has moisture retention and improved brushing properties over large areas with less impact on the water resistance of the paint film. The low molecular weight cellulose includes, but is not limited to, hydroxymethyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, etc., and the molecular weight thereof is preferably 1000-. In the examples herein, the cellulose thickener is 0.1% to 0.3%, and in specific examples 0.1%, 0.2%, or 0.3%, based on the total weight of the coating material taken as 100%.
The wetting and leveling agent promotes the paint to play a role in dispersing, wetting, leveling, smoothing, homogenizing and the like in the film forming process. In some embodiments, the wetting and leveling agent is at least one of organosilicone, acrylate and alkynediol, so that the coating has the characteristics of dynamic wetting and leveling, static wetting and leveling and no foam stabilization, and the hand feeling of a paint film is improved. In specific examples, the wetting and leveling agent is available from bike, digao or Mingling. In the examples, the amount of the wetting and leveling agent is 0.5% to 1%, and in the specific examples, the amount of the wetting and leveling agent is 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, or 1%, based on 100% by weight of the total coating.
The adhesion promoter is used for improving the adhesion of the coating, the selected material does not contain polysiloxane nonionic compounds, the effective component is 80% +/-2%, the selected material is compounded with the polycarbonate polyurethane emulsion, the bonding force of the coating and various base materials is obviously improved, the consumption is low, the effect is good, the storage is stable, the effect is long-acting, and the characteristics of effectively improving the moisture resistance, the salt spray resistance, the heat resistance and the like of the coating are realized. In some embodiments, the adhesion promoter is available from Haimax. In the examples of the present application, the adhesion promoter is 0.2% to 0.5%, and in specific examples, the adhesion promoter is 0.2%, 0.3%, 0.4%, or 0.5%, based on 100% of the total weight of the coating.
The extinction powder is preferably fumed silica, the selected material has uniform particle size distribution, high extinction efficiency, good transparency, easy dispersion and good dispersion stability, and has little influence on the water resistance of a paint film. In specific examples, the matting powder is available from Degussa or Geleiya. In the examples, the matting powder is 0% to 1.5% by total weight of the coating material of 100%, and in specific examples, the matting powder is 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, or 1.5%.
The anti-settling auxiliary agent is preferably an aqueous polyurea compound, and has the advantages of good anti-settling effect, good anti-sagging performance, convenience in use and small influence on other performances of a paint film. In specific examples, the anti-settling additive is available from Bike. In the examples of the present application, the anti-settling additive is 0.3% to 0.8% based on 100% of the total weight of the coating, and in the specific examples, the anti-settling additive is 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, or 0.8%.
The film-forming assistant is used for promoting the film formation of the coating and can be selected from dipropylene glycol butyl ether and/or dipropylene glycol methyl ether. In some embodiments, the coalescent is selected to be a mixture of dipropylene glycol butyl ether and dipropylene glycol methyl ether, and the weight ratio of dipropylene glycol butyl ether to dipropylene glycol methyl ether is 1 (1.5-2). The selected material can reduce the film forming temperature of the emulsion, promote the mutual fusion of molecular chains of emulsion particles, the better the mutual fusion of the emulsion particles, the more compact the paint film is, the more spread the molecular chains are, the more obvious the action of related polar groups and the surface of a substrate is, and correspondingly, the better the adhesive force is. In the examples of the present application, the film forming aid is 3% to 7%, and the anti-settling aid in the specific examples is 3%, 4%, 5%, 6% or 7%, based on 100% of the total weight of the coating.
The bactericidal mildew preventive is used for preventing mildew spots on the coating, in some embodiments, the bactericidal mildew preventive is chloromethyl isothiazolinone and/or methylisothiazolinone, and the selected material has the characteristics of high efficiency, low toxicity, convenience in use, no need of being diluted with water in advance and the like. In the embodiment of the application, the bactericidal and mildewproof agent accounts for 0.2 to 0.5 percent of the total weight of the coating as 100 percent, and the bactericidal and mildewproof agent in the specific embodiment accounts for 0.2 percent, 0.3 percent, 0.4 percent or 0.5 percent.
The flame retardant endows the coating with fireproof performance, and comprises but is not limited to ammonium polyphosphate, melamine polyphosphate, piperazine pyrophosphate, aluminum hypophosphite, novel triazine charring agents and the like, in some embodiments, the flame retardant comprises a first flame retardant and a second flame retardant, the first flame retardant is the novel triazine charring agent, the second flame retardant is at least one of ammonium polyphosphate, melamine polyphosphate, piperazine pyrophosphate and aluminum hypophosphite, and the second flame retardant is 1-4 parts by weight based on 1 part by weight of the first flame retardant. The flame retardant has a simple flame retardant system, has foaming and carbon forming functions, enables a paint film to have good flame retardant property, and can improve the water resistance of the paint film. In the examples herein, the flame retardant is 15% to 20%, and in specific examples 15%, 16%, 17%, 18%, 19%, or 20%, based on the total weight of the coating taken as 100%.
The water is used as a diluent of the coating and is used for adjusting the viscosity of the coating so as to facilitate the construction. The water includes, but is not limited to, purified water, distilled water, deionized water, and the like, and in some embodiments, the water is deionized water.
In summary, under the synergistic effect of the polycarbonate polyurethane emulsion, the wetting dispersant, the defoamer, the polyurethane thickener, the cellulose thickener, the wetting leveling agent, the adhesion promoter, the flatting powder, the anti-settling auxiliary agent, the film forming auxiliary agent, the sterilization mildew preventive agent and the flame retardant, the fireproof coating provided by the embodiment of the application has good dispersibility, storage performance and rheological property, and a paint film formed by the fireproof coating is flat and smooth, and has excellent adhesion, good flame retardant property, strong wrapping property, high hardness and good chemical resistance.
Based on the technical scheme, the embodiment of the application also provides a preparation method of the coating.
Correspondingly, the preparation method of the fireproof coating comprises the following steps:
s01, weighing 65-79% of polycarbonate polyurethane emulsion, 0.5-1.5% of wetting dispersant, 0.5-2.0% of defoaming agent, 0.5-1.5% of polyurethane thickener, 0.1-0.3% of cellulose thickener, 0.5-1% of wetting leveling agent, 0.2-0.5% of adhesion promoter, 0-1.5% of extinction powder, 0.3-0.8% of anti-settling auxiliary agent, 3-7% of film-forming auxiliary agent, 0.2-0.5% of sterilization mildew preventive, 11-20% of flame retardant and 1-13% of water, wherein the total weight of the fireproof coating is 100%; wherein, the adhesion promoter is selected to be a non-ionic compound without polysiloxane;
s02, mixing 11% -20% of polycarbonate polyurethane emulsion, wetting dispersant, defoamer, polyurethane thickener, cellulose thickener, wetting leveling agent, adhesion promoter, matting powder, anti-settling auxiliary agent, film-forming auxiliary agent, sterilization mildew preventive, flame retardant and water.
According to the preparation method of the fireproof coating provided by the embodiment of the application, the components of the formula are mixed, the method is simple, the operation is simple and convenient, the fireproof coating prepared by the method provided by the embodiment of the application has good dispersibility, storage performance and rheological property, and a paint film formed by the fireproof coating is flat and smooth, excellent in adhesive force, good in flame retardant property, strong in wrapping property, high in hardness and good in chemical resistance.
The materials and effects of the polycarbonate polyurethane emulsion, the wetting dispersant, the defoamer, the polyurethane thickener, the cellulose thickener, the wetting leveling agent, the adhesion promoter, the matting powder, the anti-settling additive, the film-forming additive, the sterilization and mildew-proof agent, the flame retardant and the water in the step S01 are referred to above, and are not repeated herein for saving space.
In some embodiments, the coalescent is selected to be a mixture of dipropylene glycol butyl ether and dipropylene glycol methyl ether, and the weight ratio of dipropylene glycol butyl ether to dipropylene glycol methyl ether is 1 (1.5-2).
In some embodiments, the flame retardant includes a first flame retardant which is a novel triazine-based char-forming agent and a second flame retardant which is at least one of ammonium polyphosphate, melamine polyphosphate, piperazine pyrophosphate, and aluminum hypophosphite in an amount of 1 part by weight based on 1 part by weight of the first flame retardant, and the second flame retardant is 1 to 4 parts by weight based on 1 part by weight of the first flame retardant.
The mixing process in step S02 can be performed by adjusting the mixing sequence of the components according to conventional operations in the art, so as to improve the performance of the coating.
In some embodiments, the mixing process comprises:
dispersing a cellulose thickener in partial water at the rotating speed of 500-800 rpm, dispersing for 20min at the rotating speed of 800-1000 rpm, and then adding a polycarbonate polyurethane emulsion at the rotating speed of 500-800 rpm to obtain a first mixed material;
mixing the first mixed material with a wetting dispersant, an anti-settling auxiliary agent, matting powder, a flame retardant, a defoaming agent and a polyurethane thickener, and dispersing at the rotating speed of 1000-1200 rpm until the fineness is less than or equal to 30 mu m to obtain a second mixed material;
mixing the second mixed material with a film-forming aid, and dispersing for 5min at the rotating speed of 800-1000 rpm to obtain a third mixed material;
and mixing the third mixed material with an adhesion promoter, a wetting and leveling agent, a sterilization and mildew preventive, a polyurethane thickener and residual water at the rotating speed of 800-1000 rpm to obtain the fireproof coating.
In order that the details of the above-described implementation and operation of the present application will be clearly understood by those skilled in the art, and the improved performance of the fire retardant coating and the method of preparing the same in the examples of the present application will be apparent, the implementation of the present application will be illustrated by the following examples.
The formulations of the coatings provided in examples 1-3 are shown in Table 1.
TABLE 1
The preparation method of the coating comprises the following steps:
1) adding a material 1 into a clean dispersing cylinder, starting stirring equipment, adding a material 2 at the rotating speed of 600rpm, then dispersing for 20min at the rotating speed of 850rpm, then adding a material 3 at the rotating speed of 700rpm, and dispersing until all the materials are uniformly mixed to obtain a first mixed material;
2) sequentially adding 4-9 materials into the first mixed material, shoveling powder on the edge of the cylinder to ensure no agglomeration and no edge covering, flushing the powder on the edge of the cylinder and the powder on the dispersion disc with the material 10, and dispersing for 15-25 min at the rotating speed of 1200rpm to ensure that the mixed material is dispersed to the fineness of less than or equal to 30 mu m to obtain a second mixed material;
3) slowly adding 11-12 materials into the second mixed material, and dispersing for 5min at the rotating speed of 1000rpm to obtain a third mixed material;
4) and sequentially adding 13-16 materials into the third mixed material at the rotating speed of 900rpm, mixing and dispersing uniformly, and adding 17 materials to adjust the viscosity to obtain the coating.
The coating can be used by adopting a spraying or brushing method during construction, and the specific construction process is as follows:
1) blending the coating: adding 0-15% of water according to the difference of the site air temperature and the construction mode, and adjusting the viscosity to be 30-60 s;
2) pretreatment: for a wood substrate, 320-400 # sand paper is needed to be used for polishing until the surface of the substrate is smooth; for PVC plastic base materials, alcohol or other organic solvents are needed to scrub the surface of the base materials, release agents and other stains on the surface of the base materials are removed, and the surface of the base materials is cleaned by 800# to 1000# sandpaper light sand; for a metal substrate, polishing is carried out to a bright spot by using 1000# polishing paper, and the metal substrate comprises but is not limited to stainless steel, iron products, aluminum products and the like;
3) construction: spraying/brushing the prepared coating on the surface of a substrate, wherein the coating weight is controlled to be 120g/m2Preferably, the coating is ground after drying for more than or equal to 6 hours, and then the spraying/brushing of the coating is repeated for 2-4 times until the desired surface effect is obtained.
Comparative example 1
This comparative example provides a coating composition that is essentially the same as that of example 1, except that: the amount of material 13 was 0 and the amount of material 12 was 2.1 parts by weight.
Comparative example 2
This comparative example provides a coating composition that is essentially the same as that of example 1, except that: the material 3 is aqueous polyurethane emulsion.
Comparative example 3
This comparative example provides a coating composition that is essentially the same as that of example 1, except that: the material 13 is adhesion promoter LTW.
Comparative example 4
This comparative example provides a coating composition that is essentially the same as that of example 1, except that: the amount of material 7 was 0 and the amount of material 3 was 82.5 parts by weight.
Comparative example 5
This comparative example provides a coating composition that is essentially the same as that of example 1, except that: the material 7 is a novel triazine charring agent.
The coatings provided in examples 1-3 and comparative examples 1-5 were tested for properties according to test standard GB 12441-2005, the test criteria include paint film adhesion, paint film flame retardancy, paint film fineness, paint film drying time, paint film flexibility, paint film impact resistance, paint film water resistance, paint film wet heat resistance, etc., and the test results are shown in Table 2.
As a result, the coatings of examples 1-3 all produced paint film adhesion levels of 1 on wood, oil, PVC plastic and metal substrates. Wherein, the paint film adhesion formed on the oil coating, the PVC plastic substrate and the metal substrate by the paint (without the adhesion promoter) of the comparative example 1 is respectively 3-grade, 2-grade and 2-grade, the paint film adhesion formed on the oil coating, the PVC plastic substrate and the metal substrate by the paint (with the base material being the waterborne polyurethane emulsion) of the comparative example 2 is respectively 5-grade, 4-grade and 5-grade, the paint film adhesion formed on the oil coating, the PVC plastic substrate and the metal substrate by the paint (with the adhesion promoter LTW selected as the adhesion promoter) of the comparative example 3 is respectively 3-grade, 3-grade and 2-grade, the smaller the grade number is, the better the paint film adhesion is, and the compound adhesion promoter of the polycarbonate polyurethane emulsion of the embodiment can improve the paint film adhesion.
The flame-retardant time, flame spread ratio, mass damage after combustion and carbonization volume of each substrate coated with the coatings of examples 1 to 3 all meet the basic requirements of a fire-retardant coating. Wherein, the flame-retardant time, the flame propagation ratio, the mass loss and the charring volume of each substrate coated with the coating (containing no flame retardant) of comparative example 4 and the coating (containing the novel triazine charring agent) of comparative example 5 are all less than those of examples 1-3, which shows that the coating formed by compounding the specific polycarbonate polyurethane emulsion and the adhesion promoter in the examples of the application is suitable for various substrates and has good flame retardance.
TABLE 2
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The fireproof coating is characterized by comprising the following components in percentage by weight based on 100 percent of the total weight of the fireproof coating:
wherein the adhesion promoter is selected to be free of polysiloxane-free nonionic compounds.
2. The coating of claim 1 wherein the coalescent is selected from the group consisting of mixtures of dipropylene glycol butyl ether and dipropylene glycol methyl ether, and the weight ratio of dipropylene glycol butyl ether to dipropylene glycol methyl ether is 1 (1.5-2).
3. The coating of claim 1, wherein the flame retardant comprises a first flame retardant and a second flame retardant, the first flame retardant is a novel triazine-based char forming agent, the second flame retardant is at least one of ammonium polyphosphate, melamine polyphosphate, piperazine pyrophosphate and aluminum hypophosphite, and the second flame retardant is 1 to 4 parts by weight based on 1 part by weight of the first flame retardant.
4. The coating according to any one of claims 1 to 3, wherein the wetting and dispersing agent is selected from at least one of polyether modified siloxane, high molecular weight block copolymer containing pigment affinic groups.
5. The coating according to any of claims 1 to 3, characterized in that the polyurethane thickener is selected from the group consisting of non-ionic solvent-free hydrophobically modified polyurethanes.
6. The coating according to any one of claims 1 to 3, wherein the defoaming agent is selected from at least one of silica, a defoaming polysiloxane, and a polyether siloxane; and/or
The wetting and leveling agent is at least one of organic siloxane, acrylate and alkyne diol.
7. The coating according to any one of claims 1 to 3, characterized in that the matting powder is preferably fumed silica; and/or
The anti-settling auxiliary agent is preferably an aqueous polyurea compound; and/or
The bactericidal and mildewproof agent is selected from chloromethyl isothiazolinone and/or methylisothiazolinone.
8. The preparation method of the fireproof coating is characterized by comprising the following steps:
weighing 65-79% of polycarbonate polyurethane emulsion, 0.5-1.5% of wetting dispersant, 0.5-2.0% of defoaming agent, 0.5-1.5% of polyurethane thickener, 0.1-0.3% of cellulose thickener, 0.5-1% of wetting leveling agent, 0.2-0.5% of adhesion promoter, 0-1.5% of extinction powder, 0.3-0.8% of anti-settling additive, 3-7% of film-forming additive, 0.2-0.5% of sterilization mildew inhibitor, 11-20% of flame retardant and 1-13% of water, wherein the total weight of the fireproof coating is 100%; wherein the adhesion promoter is selected to be free of polysiloxane-free nonionic compounds;
mixing the polycarbonate polyurethane emulsion, the wetting dispersant, the defoamer, the polyurethane thickener, the cellulose thickener, the wetting leveling agent, the adhesion promoter, the matting powder, the anti-settling auxiliary agent, the film-forming auxiliary agent, the sterilization mildew preventive, 11-20% of the flame retardant and the water.
9. The preparation method according to claim 8, wherein the film forming aid is selected from a mixture of dipropylene glycol butyl ether and dipropylene glycol methyl ether, and the weight ratio of the dipropylene glycol butyl ether to the dipropylene glycol methyl ether is 1 (1.5-2); and/or
The flame retardant comprises a first flame retardant and a second flame retardant, wherein the first flame retardant is a novel triazine charring agent, the second flame retardant is at least one of ammonium polyphosphate, melamine polyphosphate, piperazine pyrophosphate and aluminum hypophosphite, and the second flame retardant is 1-4 parts by weight based on 1 part by weight of the first flame retardant.
10. The production method according to claim 8 or 9, wherein the mixing treatment comprises:
dispersing the cellulose thickener in part of the water at the rotating speed of 500-800 rpm, dispersing for 20min at the rotating speed of 800-1000 rpm, and then adding the polycarbonate polyurethane emulsion at the rotating speed of 500-800 rpm to obtain a first mixture;
mixing the first mixed material with the wetting dispersant, the anti-settling auxiliary agent, the matting powder, the flame retardant, the defoaming agent and the polyurethane thickener, and dispersing at the rotating speed of 1000-1200 rpm until the fineness is less than or equal to 30 microns to obtain a second mixed material;
mixing the second mixed material with the film-forming aid, and dispersing for 5min at the rotating speed of 800-1000 rpm to obtain a third mixed material;
and mixing the third mixed material with the adhesion promoter, the wetting and leveling agent, the sterilization and mildew preventive, the polyurethane thickener and the residual water at the rotating speed of 800-1000 rpm to obtain the fireproof coating.
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| CN202010517382.0A CN111662624A (en) | 2020-06-09 | 2020-06-09 | Fireproof coating and preparation method thereof |
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| CN202010517382.0A CN111662624A (en) | 2020-06-09 | 2020-06-09 | Fireproof coating and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113150671A (en) * | 2021-05-07 | 2021-07-23 | 华阳新材料科技集团有限公司 | Non-ionic water-based polyurethane-based expansion type steel structure fireproof coating and preparation method thereof |
| KR102294159B1 (en) * | 2021-01-20 | 2021-08-25 | 박현주 | Watersoluble Fire Proof Paint for Coating |
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