A kind of heat-insulating and flame-retardant water-based metal protective industrial paint and its preparation method and application

Abstract

The invention relates to the technical field of water-based coatings, and in particular to a heat-insulating and flame-retardant water-based metal protective industrial paint and a preparation method and application thereof. The preparation process comprises: grinding an inorganic heat-insulating agent and an inorganic flame retardant to obtain a composite powder; stirring the composite powder and a dispersant with a mass of Rc0, and then adding an organic film-forming base material with a mass of Rd0, deionized water with a mass of Re0, and a defoaming agent with a mass of Rf0 to obtain a composite emulsion, and determining whether to stop stirring and perform the next step of detection according to the viscosity change rate; opening a detection discharge port of a sieve with a preset aperture, determining a dispersion degree evaluation value according to the weight of a residue and the weight of a composite emulsion sample, and determining whether to adjust the Rc0 mass; obtaining the number of cracks and the number of holes of a cured sample to determine whether to correct the Rc0 mass adjustment coefficient and determine whether to adjust the Rf0 mass; the invention improves the dispersion of heat-insulating and flame-retardant components in a film-forming polymer, and improves the barrier property, elasticity and surface quality of the industrial paint.

Description

Technical Field

[0001] The invention relates to the technical field of water-based coatings, and in particular to a heat-insulating and flame-retardant water-based metal protective industrial paint and a preparation method and application thereof. Background Art

[0002] Heat-insulating and flame-retardant water-based metal protective industrial paint is a special type of paint that is usually used to protect metal surfaces from high temperatures and fire. This paint has heat-insulating and flame-retardant properties, which can effectively reduce the conduction of heat and prevent the spread of flames, thereby protecting the safety of metal surfaces and the surrounding environment.

[0003] Chinese patent application publication number: CN109321134A, discloses a flame retardant and heat-insulating water-based paint and a preparation method thereof, which is made of the following ingredients by weight: 55-65 parts of film-forming polymer, 5-10 parts of surface-modified foamed aluminum-based nanotubes, 1-5 parts of cosolvent, 10-20 parts of water, 1-3 parts of film-forming aid, 1-3 parts of emulsifier, 1-3 parts of leveling agent, and 1-3 parts of wetting agent; the film-forming polymer is made of di(2-aminoethyl)hydrogen phosphate, exo-3,6-epoxy-1,2,3,6-tetrahydrophthalic anhydride, 1,1-dimethoxy-3-(trimethylsilyloxy)-1,3-butadiene, and polyetheramine. The prepared flame retardant and heat-insulating water-based paint has the advantages of low cost, good flame retardant and heat-insulating effect, excellent water resistance, alkali resistance, wear resistance, and weather resistance, small impact on the environment, and safe and environmentally friendly use.

[0004] The existing technology also has the following problems: the inorganic additives used as thermal insulation and flame retardant have poor mutual solubility with the film-forming polymer and are prone to agglomeration, which will cause the thermal insulation and flame retardant components to be unevenly dispersed in the film-forming polymer, seriously affecting the thermal insulation and flame retardant properties of the industrial paint. Summary of the invention

[0005] To this end, the present invention provides a method for preparing a heat-insulating and flame-retardant water-based metal protective industrial paint, so as to overcome the problem in the prior art that inorganic additives used as heat-insulating and flame-retardant additives and film-forming polymers have poor solubility and are prone to agglomeration, which will lead to uneven dispersion of the heat-insulating and flame-retardant components in the film-forming polymer, seriously affecting the heat-insulating and flame-retardant properties of the industrial paint.

[0006] To achieve the above object, on the one hand, the present invention provides a method for preparing a heat-insulating and flame-retardant water-based metal protective industrial paint, comprising:

[0007] Step S1, grinding an inorganic thermal insulation agent with a mass of Ra0 and an inorganic flame retardant with a mass of Rb0 in a ball milling mechanism at a preset ball milling time and a preset rotation speed to obtain a thermal insulation flame retardant composite powder, detecting the particle size of the thermal insulation flame retardant composite powder by a laser particle size analyzer, and determining by a control unit whether to adjust the preset rotation speed of the ball milling mechanism and the preset ball milling time according to the particle size of the composite powder and the preset particle size, so that the particle size of the thermal insulation flame retardant composite powder meets the standard;

[0008] Step S2, stirring the heat-insulating flame-retardant composite powder and the dispersant with a mass of Rc0 in a stirrer at a first preset stirring rate, and when the stirring time reaches the preset stirring time, adding the organic film-forming base with a mass of Rd0, the deionized water with a mass of Re0 and the defoaming agent with a mass of Rf0 to obtain a composite emulsion;

[0009] Step S3, adjusting the first preset stirring rate to a second preset stirring rate to stir the composite emulsion, detecting the viscosity of the composite emulsion by a viscosity detector, and determining whether to stop stirring and perform the next step of detection according to the viscosity change rate and the preset viscosity change rate by a control unit;

[0010] Step S4, opening the detection outlet of the sieve with a preset aperture, collecting the residue on the sieve after the sample of the composite emulsion of a preset volume passes through the sieve, and the control unit determines the dispersion evaluation value according to the weight of the residue and the weight of the composite emulsion sample, determines whether to adjust the Rc0 mass according to the dispersion evaluation value and the preset dispersion evaluation value, and determines the Rc0 mass adjustment coefficient;

[0011] Step S5, collecting the composite emulsion sample, coating the sample with a preset thickness and a preset area on the surface of the metal plate, curing the sample at a preset temperature, stretching the metal plate with a preset tensile force, obtaining a surface image of the cured sample through an electron scanning microscope, and obtaining the number of cracks and the number of holes within a preset area, the control unit determining to correct the Rc0 mass adjustment coefficient according to the number of cracks, and determining to adjust the Rf0 mass according to the number of holes;

[0012] Step S6: When the composite emulsion sample is qualified, the preparation of the industrial paint is completed, the finished product discharge port is opened, and the industrial paint is filled.

[0013] Further, in step S1, the control unit obtains the actual particle size L of the composite powder, and determines whether to adjust the preset rotation speed of the ball milling mechanism according to the particle size L of the composite powder and the preset particle size L0, including:

[0014] When L>L0, the control unit determines that the preset rotation speed of the ball milling mechanism needs to be adjusted, and increases the rotation speed of the ball milling mechanism;

[0015] When L≤L0, the control unit determines that there is no need to adjust the preset rotation speed of the ball milling mechanism.

[0016] Furthermore, the control unit presets a maximum rotation speed Nmax of the ball milling mechanism, and the control unit obtains the increased rotation speed Ni, and determines whether to adjust the preset ball milling time according to the increased rotation speed Ni and the maximum rotation speed Nmax, and the determination of whether to adjust the preset ball milling time includes:

[0017] When Ni≤Nmax, the control unit determines that the preset ball milling time does not need to be adjusted;

[0018] When Ni>Nmax, the control unit sets the rotation speed of the ball milling mechanism to Nmax and increases the preset ball milling time;

[0019] Among them, i=1,2.

[0020] Further, in step S3, the control unit obtains the actual viscosity change rate ΔS, and determines whether to stop stirring and perform the next step of detection according to the actual viscosity change rate ΔS and the preset viscosity change rate ΔS0, including:

[0021] When ΔS>ΔS0, the control unit determines to continue stirring the composite emulsion;

[0022] When ΔS≤ΔS0, the control unit determines to open the detection outlet to perform the next detection.

[0023] Further, in step S4, the control unit obtains the weight m1 of the residue and the weight m2 of the composite emulsion sample, determines the dispersion evaluation value P according to the weight m1 of the residue and the weight m2 of the composite emulsion sample, and sets Determining whether to adjust the quality of Rc0 according to the dispersion evaluation value P and the preset dispersion evaluation value P0 includes:

[0024] When P≥P0, the control unit determines that there is no need to adjust the mass of Rc0;

[0025] When P<P0, the control unit determines to adjust the Rc0 mass.

[0026] Further, when the control unit determines that the Rc0 quality needs to be adjusted, the control unit determines the dispersion evaluation value difference ΔP according to the dispersion evaluation value P and the preset dispersion evaluation value P0, and sets ΔP=P0-P. The control unit determines the Rc0 quality adjustment coefficient Xw according to the dispersion evaluation value difference ΔP and the preset dispersion evaluation value difference ΔPd. The control unit is provided with a first preset dispersion evaluation value difference ΔP1, a first preset dispersion evaluation value difference ΔP2, a first Rc0 quality adjustment coefficient X1, a second Rc0 quality adjustment coefficient X2, and a third Rc0 quality adjustment coefficient X3, wherein 1<X1<X2<X3<1.4, and the determination of the Rc0 quality adjustment coefficient Xw includes:

[0027] When ΔP<ΔP1, the control unit selects the first Rc0 mass adjustment coefficient X1 to adjust the Rc0 mass;

[0028] When ΔP1≤ΔP<ΔP2, the control unit selects the second Rc0 mass adjustment coefficient X2 to adjust the Rc0 mass;

[0029] When ΔP≥ΔP2, the control unit selects a third Rc0 mass adjustment coefficient X3 to adjust the Rc0 mass;

[0030] When the control unit selects the wRc0 mass adjustment coefficient to adjust the Rc0 mass, w=1, 2, 3 is set, the control unit sets the adjusted Rc0 mass to Rc, sets Rc=Xw×Rc0, and sets the added dispersant mass to ΔRc, sets ΔRc=Rc-Rc0.

[0031] Further, in step S5, the control unit is provided with a first preset crack number Q1, a second preset crack number Q2, a first Rc0 mass correction coefficient Y1, a second Rc0 mass correction coefficient Y2, and a third Rc0 mass correction coefficient Y3, wherein 0.6<Y3<Y2<Y1<1, and the control unit obtains the crack number Q, and the control unit determines to correct the Rc0 mass adjustment coefficient Xw according to the crack number Q, including:

[0032] When Q<Q1, the control unit selects the first Rc0 mass correction coefficient Y1 to correct the Rc0 mass adjustment coefficient Xw;

[0033] When Q1≤Q<Q2, the control unit selects the second Rc0 mass correction coefficient Y2 to correct the Rc0 mass adjustment coefficient Xw;

[0034] When Q≥Q2, the control unit selects the third Rc0 mass correction coefficient Y3 to correct the Rc0 mass adjustment coefficient Xw;

[0035] When the control unit selects the zth Rc0 mass correction coefficient to correct the Rc0 mass adjustment coefficient Xw, z=1, 2, 3 is set; the control unit sets the corrected Rc0 mass adjustment coefficient Xw to Xw1, and sets Xw1=Xw×Yz.

[0036] Further, in step S5, the control unit is provided with a first preset hole number K1, a second preset hole number K2, a first Rf0 quality adjustment coefficient G1, a second Rf0 quality adjustment coefficient G2, and a third Rf0 quality adjustment coefficient G3, wherein 1<G1<G2<G3<1.4, the control unit obtains the hole number K, and determines the Rf0 quality adjustment coefficient Gu according to the hole number K and the preset hole number to adjust the Rf0 quality, wherein u=1, 2, 3; the determination of the Rf0 quality adjustment coefficient Gu includes:

[0037] When K<K1, the control unit selects the first Rf0 quality adjustment coefficient G1 to adjust the Rf0 quality;

[0038] When K1≤K<K2, the control unit selects the second Rf0 quality adjustment coefficient G2 to adjust the Rf0 quality;

[0039] When K≥K2, the control unit selects the third Rf0 quality adjustment coefficient G3 to adjust the Rf0 quality;

[0040] When the control unit selects the uRf0 mass adjustment coefficient to adjust the Rf0 mass, u is set to 1, 2, 3, and the control unit sets the adjusted Rc0 mass to Rf, setting Rf=Gu×Rf0, and sets the added defoaming agent mass to ΔRf, setting ΔRf=Rf-Rf0.

[0041] In a second aspect, the present invention provides a heat-insulating and flame-retardant water-based metal protective industrial paint, comprising an organic film-forming base material, an inorganic heat-insulating agent, an inorganic flame retardant, a defoaming agent and deionized water.

[0042] In a third aspect, the present invention provides an application of a heat-insulating and flame-retardant water-based metal protective industrial paint, wherein the industrial paint is applied to the painting of ships and buildings.

[0043] Compared with the prior art, the beneficial effect of the present invention lies in that, by determining whether to adjust the preset rotation speed of the ball milling mechanism and the preset ball milling time according to the particle size of the composite powder and the preset particle size, the grinding parameters can be dynamically adjusted according to the actual grinding conditions, so that the particle size consistency of the thermal insulation and flame retardant composite powder is high, providing quality assurance for the subsequent mixing process.

[0044] Furthermore, by first stirring the thermal insulation flame retardant composite powder and a dispersant with a mass of Rc0 in a mixer at a first preset stirring rate, the thermal insulation flame retardant composite powder can be evenly dispersed, and the thermal insulation flame retardant composite powder is surface-modified by the dispersant, which can reduce the surface tension of the thermal insulation flame retardant composite powder and further improve the dispersion degree of the thermal insulation flame retardant composite powder in the organic film-forming base material.

[0045] Furthermore, by determining whether to stop stirring and perform the next step of detection based on the viscosity change rate and the preset viscosity change rate, the accuracy of the detection timing can be improved, thereby optimizing the detection process and improving production efficiency.

[0046] Furthermore, by determining whether to adjust the Rc0 mass according to the dispersion degree evaluation value and the preset dispersion degree evaluation value, and determining the Rc0 mass adjustment coefficient, the added mass of the dispersant can be dynamically adjusted to improve the dispersion degree of the thermal insulation flame retardant composite powder.

[0047] Furthermore, by correcting the Rc0 mass adjustment coefficient according to the number of cracks, the accuracy of the added mass of the dispersant can be further improved, avoiding excessive adjustment of the added mass of the dispersant, which may affect the elastic properties of the industrial paint after curing.

[0048] Furthermore, by adjusting the Rf0 quality according to the number of holes, bubbles in the industrial paint can be reduced, and the barrier properties, elastic properties and surface quality of the industrial paint can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 This is a flow chart of a method for preparing a heat-insulating and flame-retardant water-based metal protective industrial paint according to an embodiment of the present invention;

[0050] Figure 2 A logic diagram for determining the RCO quality adjustment coefficient according to an embodiment of the present invention;

[0051] Figure 3 A logic diagram for determining the RCO quality correction coefficient according to an embodiment of the present invention;

[0052] Figure 4 A logic diagram for determining the Rf0 quality adjustment coefficient according to an embodiment of the present invention. DETAILED DESCRIPTION

[0053] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0054] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0055] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0056] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] See also Figure 1 As shown, it is a flow chart of a method for preparing a heat-insulating and flame-retardant water-based metal protective industrial paint according to an embodiment of the present invention. A method for preparing a heat-insulating and flame-retardant water-based metal protective industrial paint comprises:

[0058] Step S1, grinding an inorganic heat insulating agent with a mass of Ra0 and an inorganic flame retardant with a mass of Rb0 in a ball milling mechanism at a preset ball milling time t0 and a preset rotation speed N0 to obtain a heat insulating flame retardant composite powder, detecting the particle size L of the heat insulating flame retardant composite powder by a laser particle size analyzer, and determining by a control unit whether to adjust the preset rotation speed N0 of the ball milling mechanism and the preset ball milling time t0 according to the particle size L of the composite powder and the preset particle size L0, so that the particle size L of the heat insulating flame retardant composite powder meets the standard;

[0059] Step S2, stirring the heat-insulating flame-retardant composite powder and the dispersant with a mass of Rc0 in a stirrer at a first preset stirring rate, and when the stirring time reaches the preset stirring time, adding the organic film-forming base with a mass of Rd0, the deionized water with a mass of Re0 and the defoaming agent with a mass of Rf0 to obtain a composite emulsion;

[0060] Step S3, adjusting the first preset stirring rate Ve1 to the second preset stirring rate Ve2 to stir the composite emulsion, detecting the viscosity of the composite emulsion by a viscosity detector, and determining whether to stop stirring and perform the next step of detection according to the viscosity change rate and the preset viscosity change rate by a control unit;

[0061] Step S4, opening the detection outlet of the sieve with a preset aperture AP0, collecting the residue on the sieve after the sample of the composite emulsion with a preset volume VOL passes through the sieve, and determining the dispersion evaluation value according to the weight of the residue and the weight of the composite emulsion sample by the control unit, determining whether to adjust the mass of Rc0 according to the dispersion evaluation value P and the preset dispersion evaluation value P0, and determining the Rc0 mass adjustment coefficient;

[0062] Step S5, collecting the composite emulsion sample, coating the sample with a preset thickness TH and a preset area AR on the surface of the metal plate, curing the sample at a preset temperature, stretching the metal plate with a preset tensile force Pu, acquiring a surface image of the cured sample through an electron scanning microscope, and acquiring the number of cracks Q and the number of holes K within the preset area AR, the control unit determining to correct the Rc0 mass adjustment coefficient according to the number of cracks Q, and determining to adjust the Rf0 mass according to the number of holes K;

[0063] Step S6: When the composite emulsion sample is qualified, the preparation of the industrial paint is completed, the finished product discharge port is opened, and the industrial paint is filled.

[0064] In the embodiment of the present invention, t0=2h, L0=2.5μm, and N0=80r / min are set.

[0065] Specifically, by grinding the inorganic thermal insulation agent with a mass of Ra0 and the inorganic flame retardant with a mass of Rb0 to a preset particle size L0 in a ball mill, the specific surface area of ​​the thermal insulation flame retardant composite powder can be increased, and the intermolecular force between the thermal insulation flame retardant composite powder and the organic film-forming base material can be enhanced, thereby improving the dispersion degree of the thermal insulation flame retardant composite powder in the organic film-forming base material.

[0066] In the embodiment of the present invention, Ra0 mass = 60kg, Rb0 mass = 90kg, Rc0 mass = 600g, Rd0 mass = 30kg, Re0 mass = 210kg, and Rf0 mass = 10kg are set. Those skilled in the art can adjust the preset mass according to actual production requirements.

[0067] In the embodiment of the present invention, Ve1>Ve2, and it is set that Ve1=1300r / min and Ve2=500r / min.

[0068] Specifically, by first stirring the thermal insulation flame retardant composite powder and a dispersant with a mass of Rc0 in a mixer at a first preset stirring rate Ve1, the thermal insulation flame retardant composite powder can be evenly dispersed, and the thermal insulation flame retardant composite powder is surface-modified by the dispersant, which can reduce the surface tension of the thermal insulation flame retardant composite powder and further improve the dispersion degree of the thermal insulation flame retardant composite powder in the organic film-forming base material.

[0069] Specifically, the dispersion speed of the composite powder can be increased by stirring the thermal insulation flame retardant composite powder and the dispersant with a mass of Rc0 at high speed, and the thermal insulation flame retardant composite powder, the dispersant with a mass of Rc0, the organic film-forming base material with a mass of Rd0, the deionized water with a mass of Re0 and the defoaming agent with a mass of Rf0 can be fully mixed by stirring the thermal insulation flame retardant composite powder, the dispersant with a mass of Rc0, the organic film-forming base material with a mass of Re0 and the defoaming agent with a mass of Rf0 at low speed, and the barrier flame retardant composite and the organic film-forming base material can be fully coupled, thereby improving the stability of the molecules and thus improving the heat-resistant flame retardant properties.

[0070] In the embodiment of the present invention, the metal plate is an aluminum plate, and the size of the aluminum plate is 20cm×20cm×0.1㎜.

[0071] In the embodiment of the present invention, AP0=3 μm, VOL=100 ml, TH=30 μm, AR=100 cm 2 , Pu=200MPa.

[0072] Specifically, the preparation method of the present invention can optimize the preparation process of industrial paint, overcome the poor solubility of inorganic additives used as thermal insulation and flame retardant and film-forming polymers, and the easy agglomeration, which will cause the thermal insulation and flame retardant components to be unevenly dispersed in the film-forming polymer, seriously affecting the thermal insulation and flame retardant properties of the industrial paint.

[0073] In the embodiment of the present invention, in step S1, the control unit obtains the actual particle size L of the composite powder, and determines whether to adjust the preset rotation speed N0 of the ball milling mechanism according to the particle size L of the composite powder and the preset particle size L0, including:

[0074] When L>L0, the control unit determines that the preset rotation speed N0 of the ball mill mechanism needs to be adjusted, and increases the rotation speed N of the ball mill mechanism;

[0075] When L≤L0, the control unit determines that the preset rotation speed N0 of the ball mill mechanism does not need to be adjusted.

[0076] Specifically, by determining whether to adjust the preset rotation speed N0 of the ball milling mechanism and the preset ball milling time t0 according to the particle size L of the composite powder and the preset particle size L0, the grinding parameters can be dynamically adjusted according to the actual grinding conditions, so that the particle size L of the thermal insulation and flame retardant composite powder is highly consistent, providing quality assurance for the subsequent mixing process.

[0077] In the embodiment of the present invention, the control unit presets a maximum speed Nmax of the ball milling mechanism, and the control unit obtains the increased speed Ni, and determines whether to adjust the preset ball milling time according to the increased speed Ni and the maximum speed Nmax, and the determination of whether to adjust the preset ball milling time includes:

[0078] When Ni≤Nmax, the control unit determines that there is no need to adjust the preset ball milling time;

[0079] When Ni>Nmax, the control unit sets the rotation speed of the ball milling mechanism to Nmax and increases the preset ball milling time;

[0080] Among them, i=1,2.

[0081] In the embodiment of the present invention, Nmax is set to 120 r / min.

[0082] In the embodiment of the present invention, in step S3, the control unit obtains the actual viscosity change rate ΔS, and determines whether to stop stirring and perform the next step of detection according to the actual viscosity change rate ΔS and the preset viscosity change rate ΔS0, including:

[0083] When ΔS>ΔS0, the control unit determines to continue stirring the composite emulsion;

[0084] When ΔS≤ΔS0, the control unit determines to open the detection outlet to perform the next detection.

[0085] Specifically, by determining whether to stop stirring and proceed to the next step of detection based on the viscosity change rate and the preset viscosity change rate, the accuracy of the detection timing can be improved, thereby optimizing the detection process and improving production efficiency.

[0086] In the embodiment of the present invention, ΔS0 is set to 5%.

[0087] In the embodiment of the present invention, in step S4, the control unit obtains the weight m1 of the residue and the weight m2 of the composite emulsion sample, determines the dispersion evaluation value P according to the weight m1 of the residue and the weight m2 of the composite emulsion sample, and sets Determining whether to adjust the quality of Rc0 according to the dispersion evaluation value P and the preset dispersion evaluation value P0 includes:

[0088] When P≥P0, the control unit determines that there is no need to adjust the mass of Rc0;

[0089] When P<P0, the control unit determines to adjust the Rc0 mass.

[0090] In the embodiment of the present invention, P0=3 is set.

[0091] See also Figure 2 As shown, it is a logic diagram for determining the RCO quality adjustment coefficient in an embodiment of the present invention.

[0092] In an embodiment of the present invention, when the control unit determines that the Rc0 quality needs to be adjusted, the control unit determines the dispersion evaluation value difference ΔP according to the dispersion evaluation value P and the preset dispersion evaluation value P0, and sets ΔP=P0-P. The control unit determines the Rc0 quality adjustment coefficient Xw according to the dispersion evaluation value difference ΔP and the preset dispersion evaluation value difference ΔPd. The control unit is provided with a first preset dispersion evaluation value difference ΔP1, a first preset dispersion evaluation value difference ΔP2, a first Rc0 quality adjustment coefficient X1, a second Rc0 quality adjustment coefficient X2, and a third Rc0 quality adjustment coefficient X3, wherein 1<X1<X2<X3<1.4, and the determination of the Rc0 quality adjustment coefficient Xw includes:

[0093] When ΔP<ΔP1, the control unit selects the first Rc0 mass adjustment coefficient X1 to adjust the Rc0 mass;

[0094] When ΔP1≤ΔP<ΔP2, the control unit selects the second Rc0 mass adjustment coefficient X2 to adjust the Rc0 mass;

[0095] When ΔP≥ΔP2, the control unit selects a third Rc0 mass adjustment coefficient X3 to adjust the Rc0 mass;

[0096] When the control unit selects the wRc0 mass adjustment coefficient to adjust the Rc0 mass, w=1, 2, 3 is set, the control unit sets the adjusted Rc0 mass to Rc, sets Rc=Xw×Rc0, and sets the added dispersant mass to ΔRc, sets ΔRc=Rc-Rc0.

[0097] Specifically, by determining whether to adjust the Rc0 mass according to the dispersion degree evaluation value and the preset dispersion degree evaluation value and determining the Rc0 mass adjustment coefficient, the added mass of the dispersant can be dynamically adjusted to improve the dispersion degree of the thermal insulation flame retardant composite powder.

[0098] In the embodiment of the present invention, it is set that ΔP1=0.3, ΔP2=0.6, X1=1.1, X2=1.2, and X3=1.3.

[0099] See also Figure 3 As shown, it is a logic diagram for determining the RCO quality correction coefficient in an embodiment of the present invention.

[0100] In the embodiment of the present invention, in step S5, the control unit is provided with a first preset crack number Q1, a second preset crack number Q2, a first Rc0 mass correction coefficient Y1, a second Rc0 mass correction coefficient Y2, and a third Rc0 mass correction coefficient Y3, wherein 0.6<Y3<Y2<Y1<1, and the control unit obtains the crack number Q, and the control unit determines to correct the Rc0 mass adjustment coefficient Xw according to the crack number Q, including:

[0101] When Q<Q1, the control unit selects the first Rc0 mass correction coefficient Y1 to correct the Rc0 mass adjustment coefficient Xw;

[0102] When Q1≤Q<Q2, the control unit selects the second Rc0 mass correction coefficient Y2 to correct the Rc0 mass adjustment coefficient Xw;

[0103] When Q≥Q2, the control unit selects the third Rc0 mass correction coefficient Y3 to correct the Rc0 mass adjustment coefficient Xw;

[0104] When the control unit selects the zth Rc0 mass correction coefficient to correct the Rc0 mass adjustment coefficient Xw, z=1, 2, 3 is set; the control unit sets the corrected Rc0 mass adjustment coefficient Xw to Xw1, and sets Xw1=Xw×Yz.

[0105] Specifically, by correcting the Rc0 mass adjustment coefficient according to the number of cracks, the accuracy of the added mass of the dispersant can be further improved, avoiding excessive adjustment of the added mass of the dispersant, which affects the elastic properties of the industrial paint after curing.

[0106] In the embodiment of the present invention, it is set that Q1=10, Q2=20, Y1=0.9, Y2=0.8, and Y3=0.7.

[0107] See also Figure 4 As shown, it is a logic diagram for determining the Rf0 quality adjustment coefficient in an embodiment of the present invention.

[0108] In the embodiment of the present invention, in step S5, the control unit is provided with a first preset hole number K1, a second preset hole number K2, a first Rf0 quality adjustment coefficient G1, a second Rf0 quality adjustment coefficient G2, and a third Rf0 quality adjustment coefficient G3, wherein 1<G1<G2<G3<1.4, the control unit obtains the hole number K, and determines the Rf0 quality adjustment coefficient Gu according to the hole number K and the preset hole number to adjust the Rf0 quality, wherein u=1, 2, 3; the determination of the Rf0 quality adjustment coefficient Gu includes:

[0109] When K<K1, the control unit selects the first Rf0 quality adjustment coefficient G1 to adjust the Rf0 quality;

[0110] When K1≤K<K2, the control unit selects the second Rf0 quality adjustment coefficient G2 to adjust the Rf0 quality;

[0111] When K≥K2, the control unit selects the third Rf0 quality adjustment coefficient G3 to adjust the Rf0 quality;

[0112] When the control unit selects the uRf0 mass adjustment coefficient to adjust the Rf0 mass, u is set to 1, 2, 3, and the control unit sets the adjusted Rc0 mass to Rf, setting Rf=Gu×Rf0, and sets the added defoaming agent mass to ΔRf, setting ΔRf=Rf-Rf0.

[0113] Specifically, by adjusting the Rf0 quality according to the number of holes, bubbles in the industrial paint can be reduced, and the barrier properties, elastic properties and surface quality of the industrial paint can be improved.

[0114] In the embodiment of the present invention, it is set that K1=5, K2=10, G1=1.1, G2=1.2, and G3=1.3.

[0115] The embodiment of the present invention also provides a heat-insulating and flame-retardant water-based metal protective industrial paint, which includes an organic film-forming base material, an inorganic heat-insulating agent, an inorganic flame retardant, a defoaming agent and deionized water.

[0116] Specifically, the inorganic heat insulating agent includes at least one of aluminum oxide, aluminum silicate and silicon dioxide.

[0117] Specifically, the inorganic flame retardant includes at least one of magnesium hydroxide, aluminum phosphate and zirconium oxide.

[0118] Specifically, the dispersant includes at least one of polyvinyl alcohol, polyacrylamide and polyoxyethylene octyl ether.

[0119] Specifically, the organic film-forming base material includes at least one of acrylic, polyurethane and polyether resins.

[0120] The embodiment of the present invention also provides an application of a heat-insulating and flame-retardant water-based metal protective industrial paint, wherein the industrial paint is applied to the painting of ships and buildings.

[0121] Comparative Example

[0122] This example provides a high heat-insulating flame-retardant paint and a preparation method and application thereof. The formula is the same as Example 1 in Chinese invention patent application CN114716896A.

[0123] The water-based metal protective industrial paint prepared in the above examples and the high heat insulation flame retardant paint in the comparative example were tested. The test methods and results are shown in Table 1.

[0124] Table 1

[0125] Example 1 Example 2 Example 3 Comparative Example Insulation temperature difference (℃) 8.95 9.35 9.5 7.64 Limiting oxygen index (%) 26 24 23 30 Surface drying time (min) 30 22 20 35 Adhesion(Ma) 8.6 9.0 9.0 8.6 Hot hardness (200℃) 4H 5H 5H 3H

[0126] In the above table, Example 1 is an industrial paint prepared without any adjustment operation, Example 2 is an industrial paint prepared by adjusting only the rotation speed of the stirring and ball milling mechanism, and Example 3 is an industrial paint prepared by adjusting the rotation speed of the stirring and ball milling mechanism and adjusting and / or modifying the inorganic flame retardant.

[0127] As can be seen from Table 1, the water-based metal protective industrial paint disclosed in Example 1 of the present invention has higher adhesion, thermal hardness, good flame retardant and heat insulation properties, and faster drying time compared with traditional water-based paints.

[0128] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A method for preparing a heat-insulating and flame-retardant water-based metal protective industrial paint, characterized in that: include: Step S1, grinding an inorganic thermal insulation agent with a mass of Ra0 and an inorganic flame retardant with a mass of Rb0 in a ball milling mechanism at a preset ball milling time and a preset rotation speed to obtain a thermal insulation flame retardant composite powder, detecting the particle size of the thermal insulation flame retardant composite powder by a laser particle size analyzer, and determining by a control unit whether to adjust the preset rotation speed of the ball milling mechanism and the preset ball milling time according to the particle size of the composite powder and the preset particle size, so that the particle size of the thermal insulation flame retardant composite powder meets the standard; Step S2, stirring the heat-insulating flame-retardant composite powder and the dispersant with a mass of Rc0 in a stirrer at a first preset stirring rate, and when the stirring time reaches the preset stirring time, adding the organic film-forming base with a mass of Rd0, the deionized water with a mass of Re0 and the defoaming agent with a mass of Rf0 to obtain a composite emulsion; Step S3, adjusting the first preset stirring rate to a second preset stirring rate to stir the composite emulsion, detecting the viscosity of the composite emulsion by a viscosity detector, and determining whether to stop stirring and perform the next step of detection according to the viscosity change rate and the preset viscosity change rate by a control unit; Step S4, opening the detection outlet of the sieve with a preset aperture, collecting the residue on the sieve after the sample of the composite emulsion of a preset volume passes through the sieve, and the control unit determines the dispersion evaluation value according to the weight of the residue and the weight of the composite emulsion sample, determines whether to adjust the Rc0 mass according to the dispersion evaluation value and the preset dispersion evaluation value, and determines the Rc0 mass adjustment coefficient; Step S5, collecting the composite emulsion sample, coating the sample with a preset thickness and a preset area on the surface of the metal plate, curing the sample at a preset temperature, stretching the metal plate with a preset tensile force, obtaining a surface image of the cured sample through an electron scanning microscope, and obtaining the number of cracks and the number of holes within a preset area, the control unit determining to correct the Rc0 mass adjustment coefficient according to the number of cracks, and determining to adjust the Rf0 mass according to the number of holes; Step S6: When the composite emulsion sample is qualified, the preparation of the industrial paint is completed, the finished product discharge port is opened, and the industrial paint is filled.

2. The method for preparing the heat-insulating and flame-retardant water-based metal protective industrial paint according to claim 1, characterized in that: In step S1, the control unit obtains the actual particle size L of the composite powder, and determines whether to adjust the preset rotation speed of the ball milling mechanism according to the particle size L of the composite powder and the preset particle size L0, including: When L>L0, the control unit determines that the preset rotation speed of the ball milling mechanism needs to be adjusted, and increases the rotation speed of the ball milling mechanism; When L≤L0, the control unit determines that there is no need to adjust the preset rotation speed of the ball milling mechanism.

3. The method for preparing the heat-insulating and flame-retardant water-based metal protective industrial paint according to claim 2, characterized in that: The control unit presets a maximum rotation speed Nmax of the ball milling mechanism, and the control unit obtains the increased rotation speed Ni, and determines whether to adjust the preset ball milling time according to the increased rotation speed Ni and the maximum rotation speed Nmax, wherein the determination of whether to adjust the preset ball milling time includes: When Ni≤Nmax, the control unit determines that there is no need to adjust the preset ball milling time; When Ni>Nmax, the control unit sets the rotation speed of the ball milling mechanism to Nmax and increases the preset ball milling time; Among them, i=1,2.

4. The method for preparing the heat-insulating and flame-retardant water-based metal protective industrial paint according to claim 3, characterized in that: In step S3, the control unit obtains the actual viscosity change rate ΔS, and determines whether to stop stirring and perform the next step of detection according to the actual viscosity change rate ΔS and the preset viscosity change rate ΔS0, including: When ΔS>ΔS0, the control unit determines to continue stirring the composite emulsion; When ΔS≤ΔS0, the control unit determines to open the detection outlet to perform the next detection.

5. The method for preparing the heat-insulating and flame-retardant water-based metal protective industrial paint according to claim 4, characterized in that: In step S4, the control unit obtains the weight m1 of the residue and the weight m2 of the composite emulsion sample, determines the dispersion evaluation value P according to the weight m1 of the residue and the weight m2 of the composite emulsion sample, and sets , determining whether to adjust the quality of Rc0 according to the dispersion evaluation value P and the preset dispersion evaluation value P0 includes: When P≥P0, the control unit determines that there is no need to adjust the mass of Rc0; When P<P0, the control unit determines to adjust the Rc0 mass.

6. The method for preparing the heat-insulating and flame-retardant water-based metal protective industrial paint according to claim 5, characterized in that: When the control unit determines that the Rc0 quality needs to be adjusted, the control unit determines the dispersion evaluation value difference ΔP according to the dispersion evaluation value P and the preset dispersion evaluation value P0, and sets ΔP=P0-P. The control unit determines the Rc0 quality adjustment coefficient Xw according to the dispersion evaluation value difference ΔP and the preset dispersion evaluation value difference ΔPd. The control unit is provided with a first preset dispersion evaluation value difference ΔP1, a first preset dispersion evaluation value difference ΔP2, a first Rc0 quality adjustment coefficient X1, a second Rc0 quality adjustment coefficient X2, and a third Rc0 quality adjustment coefficient X3, wherein 1<X1<X2<X3<1.4, and the determination of the Rc0 quality adjustment coefficient Xw includes: When ΔP<ΔP1, the control unit selects the first Rc0 mass adjustment coefficient X1 to adjust the Rc0 mass; When ΔP1≤ΔP<ΔP2, the control unit selects the second Rc0 mass adjustment coefficient X2 to adjust the Rc0 mass; When ΔP≥ΔP2, the control unit selects a third Rc0 mass adjustment coefficient X3 to adjust the Rc0 mass; When the control unit selects the wRc0 mass adjustment coefficient to adjust the Rc0 mass, w=1, 2, 3 is set, the control unit sets the adjusted Rc0 mass to Rc, sets Rc=Xw×Rc0, and sets the added dispersant mass to ΔRc, setting ΔRc=Rc-Rc0.

7. The method for preparing the heat-insulating and flame-retardant water-based metal protective industrial paint according to claim 6, characterized in that: In step S5, the control unit is provided with a first preset crack number Q1, a second preset crack number Q2, a first Rc0 mass correction coefficient Y1, a second Rc0 mass correction coefficient Y2, and a third Rc0 mass correction coefficient Y3, wherein 0.6<Y3<Y2<Y1<1, and the control unit obtains the crack number Q, and the control unit determines to correct the Rc0 mass adjustment coefficient Xw according to the crack number Q, including: When Q<Q1, the control unit selects the first Rc0 mass correction coefficient Y1 to correct the Rc0 mass adjustment coefficient Xw; When Q1≤Q<Q2, the control unit selects the second Rc0 mass correction coefficient Y2 to correct the Rc0 mass adjustment coefficient Xw; When Q≥Q2, the control unit selects the third Rc0 mass correction coefficient Y3 to correct the Rc0 mass adjustment coefficient Xw; When the control unit selects the zth Rc0 mass correction coefficient to correct the Rc0 mass adjustment coefficient Xw, z=1, 2, 3 is set; the control unit sets the corrected Rc0 mass adjustment coefficient Xw to Xw1, and sets Xw1=Xw×Yz.

8. The method for preparing the heat-insulating and flame-retardant water-based metal protective industrial paint according to claim 7, characterized in that: In step S5, the control unit is provided with a first preset hole number K1, a second preset hole number K2, a first Rf0 quality adjustment coefficient G1, a second Rf0 quality adjustment coefficient G2, and a third Rf0 quality adjustment coefficient G3, and the control unit obtains the hole number K, and determines the Rf0 quality adjustment coefficient Gu according to the hole number K and the preset hole number to adjust the Rf0 quality, where u=1, 2, 3; Determining the Rf0 quality adjustment coefficient Gu includes: When K<K1, the control unit selects the first Rf0 quality adjustment coefficient G1 to adjust the Rf0 quality; When K1≤K<K2, the control unit selects the second Rf0 quality adjustment coefficient G2 to adjust the Rf0 quality; When K≥K2, the control unit selects the third Rf0 quality adjustment coefficient G3 to adjust the Rf0 quality; When the control unit selects the uRf0 mass adjustment coefficient to adjust the Rf0 mass, u=1, 2, 3 is set, the control unit sets the adjusted Rc0 mass to Rf, sets Rf=Gu×Rf0, and sets the added defoaming agent mass to ΔRf, setting ΔRf=Rf-Rf0.

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