CN112831262A - Explosion-proof coating convenient to construct and preparation method thereof - Google Patents
Explosion-proof coating convenient to construct and preparation method thereof Download PDFInfo
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- CN112831262A CN112831262A CN202011553900.0A CN202011553900A CN112831262A CN 112831262 A CN112831262 A CN 112831262A CN 202011553900 A CN202011553900 A CN 202011553900A CN 112831262 A CN112831262 A CN 112831262A
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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
- C09D175/02—Polyureas
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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
- 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
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Abstract
The invention relates to an explosion-proof coating with convenient construction, which comprises A, B two components, wherein the component A comprises 0.1-1% of carbon nano tube, 0.1-1% of coupling agent, 78-94% of self-made asparagus polyurea resin, 4.5-15% of flame retardant and 1-5% of antioxidant. The sum of the percentage ratios of the components is 100 percent; the component B comprises 60-80% of isocyanate and 20-40% of polyether polyol, and the sum of the percentage ratios of the components is 100%; the component A and the component B are prepared according to the following ratio of 2-3: 1, mixing, and constructing by adopting spraying, brushing and roller coating modes to obtain the explosion-proof coating. According to the invention, an asparagus polyurea resin system is adopted, the gelation time of the A, B component after mixing is not more than 2h, and spraying, brushing and rolling coating can be adopted, so that the construction is convenient; the carbon nano tube is used as a reinforcing phase of the coating, and a jet flow homogenizer is adopted, so that the carbon nano tube can be uniformly dispersed in the coating, and the mechanical property of the coating is greatly improved. And a chemical method is not needed, so that the manufacturing time is saved, the cost is favorably reduced, and the production period is obviously shortened.
Description
Technical Field
The invention belongs to the technical field of explosion-proof material compositions, and particularly relates to an explosion-proof coating with convenient construction and a preparation method thereof.
Background
In explosion, the wall surface of the wall body hit by the shell, the shrapnel or the shock wave is an explosion-facing surface, if the wall body is a brick-built wall, the wall body is easy to collapse after the medium bomb, if the wall body is a concrete wall, the wall body is easy to peel off and fragments are easy to splash after the medium bomb, at the moment, due to the narrow space, especially in defense works, once the collapse or fragments are scattered, the casualties of internal personnel are easily caused. Therefore, it is necessary to reinforce the wall body during the construction of civil air defense engineering or defense works, or to reinforce and reform the wall body of the existing civil air defense engineering or defense works so as to make it have good explosion-proof performance.
At present, an A, B two-component coating is generally formed by the aspartic polyurea resin and the aliphatic isocyanate prepolymer, and an explosion-proof coating with excellent weather resistance is obtained through mixing and crosslinking reaction. The asparagus polyurea resin in the component A is based on an asparagus polyurea formula, and the carbon nano tube is added in the component A and is used as a one-dimensional structure, so that the asparagus polyurea resin has excellent mechanical, optical and electrical properties, is very stable in structure, and has unique rigidity and toughness. The carbon nano tube has a large length-diameter ratio and extremely high axial tensile strength, the tensile strength of the carbon nano tube reaches 50-200 GPa, the tensile strength is 100 times that of steel, and the density of the carbon nano tube is only 1/6 of the steel. These excellent properties make carbon nanotubes the best choice for the reinforcing phase of polymer composites. Before adding carbon nano tube, it is usually modified and then used, and the related method for modifying polyurethane material by carbon nano tube has been reported in patent: chinese patent CN111434739A is a preparation method of an explosion-proof, bulletproof, heat-insulating and high-strength special paint, CN201910567853 is a carbon nanotube modified polyurea explosion-proof material and a preparation method thereof, the method of the carbon nanotube modified polyurea explosion-proof material is that the carbon nanotube is firstly functionally connected into the component a of the polyurea resin system, and the method of functionally connecting the carbon nanotube into the polyurea resin system is that the composite carbon nanotube material is subjected to amination surface modification, so that the material is fused into the component a in a chemical bonding manner. The disadvantages that 1, the chemical method is complex and time-consuming in the reaction process, is not beneficial to reducing the cost and shortening the production period; 2. the component A containing the aminated surface modified composite carbon nanotube material is mixed with the component B during construction, the gel time is more than 3 hours, and the special requirements cannot be met, for example, the military explosion-proof material particularly requires the gel time to be 1.5-2 hours.
Disclosure of Invention
Aiming at the defects of the prior art, the requirements of the military explosion-proof material on performance and construction conditions are met, the formula of the asparagus polyurea is improved on the basis, and the mechanical property of the coating is improved by directly adding the carbon nano tube, so that the invention provides the explosion-proof coating with convenient construction, which is characterized by comprising A, B components, wherein the component A comprises 0.1-1% of the carbon nano tube, 0.1-1% of a coupling agent, 78-94% of self-made asparagus polyurea resin, 4.5-15% of a flame retardant and 1-5% of an antioxidant. The sum of the percentage ratios of the components is 100 percent;
the component B comprises 60-80% of isocyanate and 20-40% of polyether polyol, and the sum of the percentage ratios of the components is 100%;
the component A and the component B are prepared according to the following ratio of 2-3: 1, mixing, and constructing by adopting spraying, brushing and roller coating modes to obtain the explosion-proof coating.
Furthermore, the carbon nano-tube in the component A is a multi-wall carbon nano-tube, the diameter is 0.4-0.6nm, and the length is 0.5-2 μm.
The invention also provides a preparation method of the explosion-proof coating with convenient construction, which is characterized by comprising the following steps:
s1, preparing a component A, wherein the carbon nanotubes in the component A are multi-walled carbon nanotubes, and the multi-walled carbon nanotubes are uniformly dispersed in the component A by adopting a jet flow, so that the tensile strength and the tearing strength of the coating are greatly enhanced, fragments formed by explosion impact can be wrapped, and the safety of personnel is protected;
s2, preparing a component B; the gel and the solidification are realized;
s3, wherein the component A and the component B are mixed according to the weight ratio of 2-3: 1, mechanically mixing, starting to calculate the gel (surface dry) time for 1.5-2.0h after mixing, and constructing by adopting spraying, brushing and roller coating modes to obtain the explosion-proof coating.
Further, the step S1 of preparing the component a specifically comprises the steps of:
SA1, adding a certain amount of polyamine and amino acid into a reaction kettle at room temperature, stirring and preheating to 50-70 ℃, slowly dripping alkyl maleate within 10-30min, heating to 80-100 ℃, and keeping for 10-12h to obtain the aspartic polyurea resin.
SA2, mixing the self-made asparagus polyurea in SA1 with the carbon nano tube and the coupling agent, dispersing for 1-3h by adopting a jet flow homogenizer, adding the flame retardant and the antioxidant, and uniformly stirring at the mechanical stirring speed of 600-900r/min to form the component A.
Further, the step S2 of preparing the component B specifically comprises the following steps: adding isocyanate and polyether polyol into a reaction kettle, vacuumizing to-0.8 to-0.1 MPa, stirring, heating to 60 to 80 ℃, and maintaining for 2 to 4 hours to obtain a component B.
Further, the coupling agent in the component A is one or a mixture of more than two of a chromium complex coupling agent, a silane coupling agent, a titanate coupling agent and a pickaxe coupling agent; preferably a silane coupling agent; more preferably KH 560.
Further, the polyamine in the step SA1 is one or a mixture of two of hexamethyltetramine, 3 '-dichloro-4, 4' -diphenylmethanediamine (MOCA), propylene glycol bis- (4,4 '-diamino) benzoate, and 4, 4' -diaminodicyclohexylmethane; preferably 4, 4' -diaminodicyclohexylmethane;
the amino acid is proline;
the alkyl maleate is bis (tridecyl) maleate;
the mass ratio of the polyamine to the amino acid is 2:1-4: 1;
the mass ratio of the alkyl maleate to the polyamine is 2.5:1-5: 1.
Specifically, the flame retardant in the step SA2 is one or more of antimony trioxide, magnesium hydroxide, aluminum hydroxide, tributyl phosphate, dibromomethane, melamine, and dichlorobromomethane, preferably antimony trioxide and dichlorobromomethane, and more preferably antimony trioxide;
specifically, the antioxidant in the step SA2 is poly (4-hydroxy-2, 2,6, 6-tetramethyl-1-piperidineethanol) succinate and bis (2,2,6, 6-tetramethylpiperidyl) sebacate, and the mass ratio is 1:9-3: 7.
Specifically, the isocyanate is one or two of diphenylmethane diisocyanate (MDI), polyphenyl methane polyisocyanate (PAPI), liquefied diphenylmethane diisocyanate (LMDI), Hexamethylene Diisocyanate (HDI), and xylylene isocyanate (XDI), preferably Hexamethylene Diisocyanate (HDI) and xylylene isocyanate (XDI), and more preferably Hexamethylene Diisocyanate (HDI);
the polyether polyol is polytetrahydrofuran polyol.
The coating prepared by the invention has excellent mechanical properties such as tearing strength, tensile strength, elongation at break and the like, is convenient to construct and has good explosion-proof effect.
The invention has the following characteristics:
(1) by adopting an asparagus polyurea resin system, the gelation time of the A, B component after mixing is not more than 2h, and the spraying, brushing and rolling coating can be adopted, so that the construction is convenient.
(2) The carbon nano tube is used as a reinforcing phase of the coating, and a jet flow homogenizer is adopted, so that the carbon nano tube can be uniformly dispersed in the coating, and the mechanical property of the coating is greatly improved. A chemical method is not needed, so that the manufacturing time is saved, the cost is reduced, and the production period is obviously shortened;
(3) has good weather resistance, aging resistance, ultraviolet resistance, acid and alkali resistance, wear resistance and other properties.
(4) A, B component has 100% solid content and no VOC, and is a healthy and environment-friendly product.
(5) The coating has higher tensile strength which generally reaches 32MPa (21 MPa in a small number), tearing strength which generally reaches 128N/mm (115N/mm and 110N/mm in a small number) and breaking elongation which generally reaches more than 4/20 percent, and can play a role in 5KgTNT explosion prevention.
(6) Can be matched with other decorative coatings for use.
Detailed Description
The present invention is further illustrated by the following examples.
The invention provides an explosion-proof coating convenient for construction, which is characterized by comprising A, B components, wherein the component A comprises 0.1-1% of carbon nano tube, 0.1-1% of coupling agent, 78-94% of self-made asparagus polyurea resin, 4.5-15% of flame retardant and 1-5% of antioxidant. The sum of the percentage ratios of the components is 100 percent;
0.1% of carbon nano tube of one embodiment, 1% of carbon nano tube of another embodiment and 0.55% of carbon nano tube of still another embodiment;
0.1% of one example coupling agent, 1% of another example coupling agent, and 0.55% of still another example coupling agent;
78% of one embodiment of the aspartyl polyurea resin, 94% of another embodiment of the aspartyl polyurea resin, and 86% of yet another embodiment of the coupling agent;
4.5% of one embodiment flame retardant, 15% of another embodiment flame retardant, and 10% of yet another embodiment flame retardant;
one embodiment antioxidant 1%, another embodiment antioxidant 5%, and yet another embodiment antioxidant 3%;
the component B comprises 60-80% of isocyanate and 20-40% of polyether polyol, and the sum of the percentage ratios of the components is 100%;
the component A and the component B are prepared according to the following ratio of 2-3: 1, mixing, and constructing by adopting spraying, brushing and roller coating modes to obtain the explosion-proof coating.
Furthermore, the carbon nano-tube in the component A is a multi-wall carbon nano-tube, the diameter is 0.4-0.6nm, and the length is 0.5-2 μm. One of the examples was 0.4nm in diameter and 0.5 μm in length, the other was 0.6nm in diameter and 2 μm in length, and the other was 0.5nm in diameter and 1.2 μm in length.
The invention also provides a preparation method of the explosion-proof coating with convenient construction, which comprises the following steps:
s1, preparing a component A, wherein the carbon nanotubes in the component A are multi-walled carbon nanotubes, and the multi-walled carbon nanotubes are uniformly dispersed in the component A by adopting a jet flow, so that the tensile strength and the tearing strength of the coating are greatly enhanced, fragments formed by explosion impact can be wrapped, and the safety of personnel is protected;
s2, preparing a component B; the gel and the solidification are realized;
s3, wherein the component A and the component B are mixed according to the weight ratio of 2-3: 1, mechanically mixing, starting to calculate the gel (surface dry) time for 1.5-2.0h after mixing, and constructing by adopting spraying, brushing and roller coating modes to obtain the explosion-proof coating.
Further, the step S1 of preparing the component a specifically comprises the steps of:
SA1, adding a certain amount of polyamine and amino acid into a reaction kettle at room temperature, stirring and preheating to 50-70 ℃, slowly dripping alkyl maleate within 10-30min, heating to 80-100 ℃, and keeping for 10-12h to obtain the aspartic polyurea resin.
SA2, mixing the self-made asparagus polyurea in SA1 with the carbon nano tube and the coupling agent, dispersing for 1-3h by adopting a jet flow homogenizer, adding the flame retardant and the antioxidant, and uniformly stirring at the mechanical stirring speed of 600-900r/min to form the component A.
Further, the step S2 of preparing the component B specifically comprises the following steps: adding isocyanate and polyether polyol into a reaction kettle, vacuumizing to-0.8 to-0.1 MPa, stirring, heating to 60 to 80 ℃, and maintaining for 2 to 4 hours to obtain a component B.
Further, the coupling agent in the component A is one or a mixture of more than two of a chromium complex coupling agent, a silane coupling agent, a titanate coupling agent and a pickaxe coupling agent; preferably a silane coupling agent; more preferably KH 560.
Further, the polyamine in the step SA1 is one or a mixture of two of hexamethyltetramine, 3 '-dichloro-4, 4' -diphenylmethanediamine (MOCA), propylene glycol bis- (4,4 '-diamino) benzoate, and 4, 4' -diaminodicyclohexylmethane; preferably 4, 4' -diaminodicyclohexylmethane;
the amino acid is proline;
the alkyl maleate is bis (tridecyl) maleate;
the mass ratio of the polyamine to the amino acid is 2:1-4: 1; wherein the mass ratio of one embodiment is 2:1, the mass ratio of the other embodiment is 3:1, and the mass ratio of the other embodiment is 4: 1;
the mass ratio of the alkyl maleate to the polyamine is 2.5:1-5: 1. Wherein the mass ratio of one embodiment is 2.5:1, the mass ratio of the other embodiment is 3.5:1, and the mass ratio of the other embodiment is 5: 1;
specifically, the flame retardant in the step SA2 is one or more of antimony trioxide, magnesium hydroxide, aluminum hydroxide, tributyl phosphate, dibromomethane, melamine, and dichlorobromomethane, preferably antimony trioxide and dichlorobromomethane, and more preferably antimony trioxide;
specifically, the antioxidant in the step SA2 is poly (4-hydroxy-2, 2,6, 6-tetramethyl-1-piperidineethanol) succinate and bis (2,2,6, 6-tetramethylpiperidyl) sebacate, and the mass ratio is 1:9-3: 7. Wherein the mass ratio of one embodiment is 1:9, the mass ratio of the other embodiment is 3:7, and the mass ratio of the other embodiment is 2-8;
specifically, the isocyanate is one or two of diphenylmethane diisocyanate (MDI), polyphenyl methane polyisocyanate (PAPI), liquefied diphenylmethane diisocyanate (LMDI), Hexamethylene Diisocyanate (HDI), and xylylene isocyanate (XDI), preferably Hexamethylene Diisocyanate (HDI) and xylylene isocyanate (XDI), and more preferably Hexamethylene Diisocyanate (HDI);
the polyether polyol is polytetrahydrofuran polyol.
The laboratory data further support the practical effects achieved by the explosion-proof coating of the invention are set forth in detail further below.
In one embodiment, the preparation of the explosion-proof coating with convenient construction comprises the following materials: 0.5Kg of carbon nano tube, 0.5Kg of KH5600.5 Kg of 4, 4' -diaminodicyclohexylmethane, 5Kg of proline, 10Kg of bis (tridecyl) maleate, 6Kg of antimony trioxide, 0.5Kg of poly (4-hydroxy-2, 2,6, 6-tetramethyl-1-piperidineethanol) succinate, 4.5Kg of bis (2,2,6, 6-tetramethylpiperidyl) sebacate, 65Kg of Hexamethylene Diisocyanate (HDI) and 35Kg of polytetrahydrofuran polyol.
The preparation method comprises the following steps:
(1) adding 21Kg of 4, 4' -diaminodicyclohexylmethane and 5Kg of proline into a reaction kettle at room temperature, stirring and preheating to about 60 ℃, slowly dropwise adding 10Kg of bis (tridecyl) maleate, completing dropwise adding about 20min, then heating to 100 ℃, and keeping for 12h to obtain the aspartic polyurea resin.
(2) Mixing the self-made asparagus polyurea in the step (1) with 0.5Kg of carbon nano tube and 0.5Kg of KH560, dispersing for 2 hours by adopting a homogenizer, adding 6Kg of antimony trioxide, 0.5Kg of poly (4-hydroxy-2, 2,6, 6-tetramethyl-1-piperidineethanol) succinate and 4.5Kg of bis (2,2,6, 6-tetramethyl piperidyl) sebacate, and uniformly stirring at the mechanical stirring speed of 900r/min to form the component A.
(3) Adding 65Kg of Hexamethylene Diisocyanate (HDI) and 35Kg of polytetrahydrofuran polyol into a reaction kettle, vacuumizing to-0.8 to-0.1 MPa, stirring, heating to 60 ℃, and maintaining for 3 hours to obtain a component B.
(4) A, B components of the prepared paint are mechanically mixed according to the mass ratio of 2:1, construction is carried out by adopting a brush coating mode, an explosion-proof coating is obtained, and the thickness of the film is controlled to be 1 mm.
The technical indexes of the explosion-proof coating product with convenient construction obtained by the embodiment are shown in Table 1
TABLE 1
In the second embodiment, the preparation of the explosion-proof coating with convenient construction comprises the following materials: 0.8Kg of carbon nano tube, 0.6Kg of KH5600, 20Kg of 4, 4' -diaminodicyclohexylmethane, 7Kg of proline, 9Kg of bis (tridecyl) maleate, 7Kg of antimony trioxide, 1Kg of poly (4-hydroxy-2, 2,6, 6-tetramethyl-1-piperidineethanol) succinate, 3.5Kg of bis (2,2,6, 6-tetramethylpiperidyl) sebacate, 70Kg of Hexamethylene Diisocyanate (HDI) and 30Kg of polytetrahydrofuran polyol.
The preparation method comprises the following steps:
(1) adding 20Kg of 4, 4' -diaminodicyclohexylmethane and 7Kg of proline into a reaction kettle at room temperature, stirring and preheating to about 65 ℃, slowly dropwise adding 9Kg of bis (tridecyl) maleate, dropwise adding after about 25min, heating to 95 ℃, and keeping for 11h to obtain the aspartic polyurea resin.
(2) Mixing the self-made asparagus polyurea in the step (1) with 0.8Kg of carbon nano tube and 0.6Kg of KH560, dispersing for 2 hours by adopting a homogenizer, adding 7Kg of antimony trioxide, 1Kg of poly (4-hydroxy-2, 2,6, 6-tetramethyl-1-piperidineethanol) succinate and 3.5Kg of bis (2,2,6, 6-tetramethyl piperidyl) sebacate, and stirring uniformly at the mechanical stirring speed of 900r/min to form the component A.
(3) 70Kg of Hexamethylene Diisocyanate (HDI) and 30Kg of polytetrahydrofuran polyol are added into a reaction kettle, the reaction kettle is vacuumized to-0.8 to-0.1 MPa, the temperature is raised to 70 ℃ by stirring, and the mixture is maintained for 3 hours, thus obtaining the component B.
(4) A, B components of the prepared paint are mechanically mixed according to the mass ratio of 2.5:1, the paint is constructed by adopting a brush coating mode to obtain an explosion-proof coating, and the thickness of the film is controlled to be 1 mm.
The technical indexes of the explosion-proof coating product with convenient construction obtained by the embodiment are shown in Table 2
TABLE 2
In the third embodiment, the preparation of the explosion-proof coating with convenient construction comprises the following materials: 0.5Kg of carbon nano tube, 0.5Kg of KH5600.5 Kg of 4, 4' -diaminodicyclohexylmethane, 5Kg of proline, 10Kg of bis (tridecyl) maleate, 6Kg of antimony trioxide, 0.5Kg of poly (4-hydroxy-2, 2,6, 6-tetramethyl-1-piperidineethanol) succinate, 4.5Kg of bis (2,2,6, 6-tetramethylpiperidyl) sebacate, 65Kg of Hexamethylene Diisocyanate (HDI) and 35Kg of polytetrahydrofuran polyol.
The preparation method comprises the following steps:
(1) adding 21Kg of 4, 4' -diaminodicyclohexylmethane and 5Kg of proline into a reaction kettle at room temperature, stirring and preheating to about 60 ℃, slowly dropwise adding 10Kg of bis (tridecyl) maleate, completing dropwise adding about 20min, then heating to 100 ℃, and keeping for 12h to obtain the aspartic polyurea resin.
(2) Mixing the self-made asparagus polyurea in the step (1) with 0.5Kg of carbon nano tube and 0.5Kg of KH560, dispersing for 2 hours by adopting a homogenizer, adding 6Kg of antimony trioxide, 0.5Kg of poly (4-hydroxy-2, 2,6, 6-tetramethyl-1-piperidineethanol) succinate and 4.5Kg of bis (2,2,6, 6-tetramethyl piperidyl) sebacate, and uniformly stirring at the mechanical stirring speed of 900r/min to form the component A.
(3) Adding 65Kg of Hexamethylene Diisocyanate (HDI) and 35Kg of polytetrahydrofuran polyol into a reaction kettle, vacuumizing to-0.8 to-0.1 MPa, stirring, heating to 60 ℃, and maintaining for 3 hours to obtain a component B.
(4) A, B components of the prepared paint are mechanically mixed according to the mass ratio of 2.5:1, the paint is constructed by adopting a brush coating mode to obtain an explosion-proof coating, and the thickness of the film is controlled to be 1 mm.
The technical indexes of the explosion-proof coating product with convenient construction obtained by the embodiment are shown in Table 3
TABLE 3
In the fourth implementation of the embodiment, the preparation of the explosion-proof coating with convenient construction comprises the following materials: 0.1Kg of carbon nano tube, 0.5Kg of KH5600.5 Kg of 4, 4' -diaminodicyclohexylmethane, 5Kg of proline, 10Kg of bis (tridecyl) maleate, 6Kg of antimony trioxide, 0.5Kg of poly (4-hydroxy-2, 2,6, 6-tetramethyl-1-piperidineethanol) succinate, 4.5Kg of bis (2,2,6, 6-tetramethylpiperidyl) sebacate, 65Kg of Hexamethylene Diisocyanate (HDI) and 35Kg of polytetrahydrofuran polyol.
The preparation method comprises the following steps:
(1) adding 21Kg of 4, 4' -diaminodicyclohexylmethane and 5Kg of proline into a reaction kettle at room temperature, stirring and preheating to about 60 ℃, slowly dropwise adding 10Kg of bis (tridecyl) maleate, completing dropwise adding about 20min, then heating to 100 ℃, and keeping for 12h to obtain the aspartic polyurea resin.
(2) Mixing the self-made asparagus polyurea in the step (1) with 0.1Kg of carbon nano tube and 0.5Kg of KH560, dispersing for 2 hours by adopting a homogenizer, adding 6Kg of antimony trioxide, 0.5Kg of poly (4-hydroxy-2, 2,6, 6-tetramethyl-1-piperidineethanol) succinate and 4.5Kg of bis (2,2,6, 6-tetramethyl piperidyl) sebacate, and uniformly stirring at the mechanical stirring speed of 900r/min to form the component A.
(3) Adding 65Kg of Hexamethylene Diisocyanate (HDI) and 35Kg of polytetrahydrofuran polyol into a reaction kettle, vacuumizing to-0.8 to-0.1 MPa, stirring, heating to 60 ℃, and maintaining for 3 hours to obtain a component B.
(4) A, B components of the prepared paint are mechanically mixed according to the mass ratio of 3:1, the paint is constructed by adopting a brush coating mode, an explosion-proof coating is obtained, and the thickness of the film is controlled to be 1 mm.
The technical indexes of the explosion-proof coating product with convenient construction obtained by the embodiment are shown in Table 4
TABLE 4
Fifth embodiment of this case, the preparation of the explosion-proof coating with convenient construction includes the following materials: 0.5Kg of carbon nano tube, 0.5Kg of KH5600.5 Kg of 4, 4' -diaminodicyclohexylmethane, 5Kg of proline, 10Kg of bis (tridecyl) maleate, 5Kg of antimony trioxide, 0.5Kg of poly (4-hydroxy-2, 2,6, 6-tetramethyl-1-piperidineethanol) succinate, 4.5Kg of bis (2,2,6, 6-tetramethylpiperidyl) sebacate, 60Kg of Hexamethylene Diisocyanate (HDI) and 35Kg of polytetrahydrofuran polyol.
The preparation method comprises the following steps:
(1) adding 21Kg of 4, 4' -diaminodicyclohexylmethane and 5Kg of proline into a reaction kettle at room temperature, stirring and preheating to about 60 ℃, slowly dropwise adding 10Kg of bis (tridecyl) maleate, completing dropwise adding about 20min, then heating to 100 ℃, and keeping for 12h to obtain the aspartic polyurea resin.
(2) Mixing the self-made asparagus polyurea in the step (1) with 0.5Kg of carbon nano tube and 0.5Kg of KH560, dispersing for 2 hours by adopting a homogenizer, adding 5Kg of antimony trioxide, 0.5Kg of poly (4-hydroxy-2, 2,6, 6-tetramethyl-1-piperidineethanol) succinate and 4.5Kg of bis (2,2,6, 6-tetramethyl piperidyl) sebacate, and uniformly stirring at the mechanical stirring speed of 900r/min to form the component A.
(3) 60Kg of Hexamethylene Diisocyanate (HDI) and 35Kg of polytetrahydrofuran polyol are added into a reaction kettle, the reaction kettle is vacuumized to-0.8 to-0.1 MPa, the temperature is raised to 60 ℃ by stirring, and the mixture is maintained for 3 hours, thus obtaining the component B.
(4) A, B components of the prepared paint are mechanically mixed according to the mass ratio of 2.5:2, the paint is constructed by adopting a brush coating mode, an explosion-proof coating is obtained, and the thickness of the film is controlled to be 1 mm.
The technical indexes of the explosion-proof coating product with convenient construction obtained by the embodiment are shown in Table 5
TABLE 5
Claims (10)
1. An explosion-proof coating convenient for construction is characterized by comprising A, B two components, wherein the component A comprises 0.1-1% of carbon nano tube, 0.1-1% of coupling agent, 78-94% of self-made asparagus polyurea resin, 4.5-15% of flame retardant and 1-5% of antioxidant. The sum of the percentage ratios of the components is 100 percent;
the component B comprises 60-80% of isocyanate and 20-40% of polyether polyol, and the sum of the percentage ratios of the components is 100%;
the component A and the component B are prepared according to the following ratio of 2-3: 1, mixing, and constructing by adopting spraying, brushing and roller coating modes to obtain the explosion-proof coating.
2. The explosion-proof coating with convenient construction according to claim 1, characterized in that the carbon nanotubes in the component A are multi-walled carbon nanotubes with a diameter of 0.4-0.6nm and a length of 0.5-2 μm.
3. The method for preparing the explosion-proof coating convenient for construction according to claim 2, characterized by comprising the steps of:
s1, preparing a component A, wherein the carbon nanotubes in the component A are multi-wall carbon nanotubes and are uniformly dispersed in the component A by adopting a jet flow;
s2, preparing a component B;
s3, wherein the component A and the component B are mixed according to the weight ratio of 2-3: 1, mechanically mixing, gelling for 1.5-2.0h, and constructing by adopting spraying, brushing and roller coating modes to obtain the explosion-proof coating.
4. The preparation method of the explosion-proof coating convenient for construction according to claim 3, characterized in that the step S1 of preparing the component A comprises the following steps:
SA1, adding a certain amount of polyamine and amino acid into a reaction kettle at room temperature, stirring and preheating to 50-70 ℃, slowly dripping alkyl maleate within 10-30min, heating to 80-100 ℃, and keeping for 10-12h to obtain the aspartic polyurea resin.
SA2, mixing the self-made asparagus polyurea in SA1 with the carbon nano tube and the coupling agent, dispersing for 1-3h by adopting a jet flow homogenizer, adding the flame retardant and the antioxidant, and uniformly stirring at the mechanical stirring speed of 600-900r/min to form the component A.
5. The preparation method of the explosion-proof coating convenient for construction according to any one of claims 3 to 4, characterized in that the step S2 of preparing the component B comprises the following steps: adding isocyanate and polyether polyol into a reaction kettle, vacuumizing to-0.8 to-0.1 MPa, stirring, heating to 60 to 80 ℃, and maintaining for 2 to 4 hours to obtain a component B.
6. The preparation method of the explosion-proof coating convenient for construction according to any one of claims 3 to 4, characterized in that the coupling agent in the component A is one or a mixture of more than two of a chromium complex coupling agent, a silane coupling agent, a titanate coupling agent and a pickaxe coupling agent; preferably a silane coupling agent; more preferably KH 560.
7. The explosion-proof coating with convenient construction according to claim 4, wherein the polyamine in the step SA1 is one or two mixtures of hexamethyltetramine, 3 '-dichloro-4, 4' -diphenylmethanediamine (MOCA), propanediol bis- (4,4 '-diamino) benzoate and 4, 4' -diaminodicyclohexylmethane; preferably 4, 4' -diaminodicyclohexylmethane;
the amino acid is proline;
the alkyl maleate is bis (tridecyl) maleate;
the mass ratio of the polyamine to the amino acid is 2:1-4: 1;
the mass ratio of the alkyl maleate to the polyamine is 2.5:1-5: 1.
8. Construction-friendly explosion-proof coating according to claim 4, characterized in that said flame retardant in said step SA2 is one or more of antimony trioxide, magnesium hydroxide, aluminum hydroxide, tributyl phosphate, dibromomethane, melamine, dichlorobromomethane, preferably antimony trioxide and dichlorobromomethane, more preferably antimony trioxide.
9. The easy-to-apply explosion-proof coating according to claim 4, wherein the antioxidant in SA2 is poly (4-hydroxy-2, 2,6, 6-tetramethyl-1-piperidineethanol) succinate or bis (2,2,6, 6-tetramethylpiperidyl) sebacate at a mass ratio of 1:9 to 3: 7.
10. The coating of claim 5, wherein the isocyanate is one or two of diphenylmethane diisocyanate (MDI), polyphenylmethane polyisocyanate (PAPI), liquefied diphenylmethane diisocyanate (LMDI), Hexamethylene Diisocyanate (HDI), and xylylene isocyanate (XDI), preferably Hexamethylene Diisocyanate (HDI) and xylylene isocyanate (XDI), more preferably Hexamethylene Diisocyanate (HDI);
the polyether polyol is polytetrahydrofuran polyol.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010173884A (en) * | 2009-01-28 | 2010-08-12 | Jsr Corp | Carbon nanotube dispersion, film using the same and method of producing the same |
| US20170174933A1 (en) * | 2014-02-13 | 2017-06-22 | Basf Coatings Gmbh | Two-component coating compositions and high erosion resistance coatings produced therefrom |
| CN109354987A (en) * | 2018-11-14 | 2019-02-19 | 四川嘉宝莉涂料有限公司 | Surface drying time is moderate, is adapted to Polyaspartic Polyurea coating, preparation method, application method and the application of environmental change |
| CN110305573A (en) * | 2019-06-27 | 2019-10-08 | 青岛爱尔家佳新材料股份有限公司 | A kind of carbon nano-tube modification polyureas explosion-proof lamp and preparation method thereof |
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2020
- 2020-12-24 CN CN202011553900.0A patent/CN112831262A/en not_active Withdrawn
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|---|---|---|---|---|
| JP2010173884A (en) * | 2009-01-28 | 2010-08-12 | Jsr Corp | Carbon nanotube dispersion, film using the same and method of producing the same |
| US20170174933A1 (en) * | 2014-02-13 | 2017-06-22 | Basf Coatings Gmbh | Two-component coating compositions and high erosion resistance coatings produced therefrom |
| CN109354987A (en) * | 2018-11-14 | 2019-02-19 | 四川嘉宝莉涂料有限公司 | Surface drying time is moderate, is adapted to Polyaspartic Polyurea coating, preparation method, application method and the application of environmental change |
| CN110305573A (en) * | 2019-06-27 | 2019-10-08 | 青岛爱尔家佳新材料股份有限公司 | A kind of carbon nano-tube modification polyureas explosion-proof lamp and preparation method thereof |
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