Environmentally friendly and flame-retardant coating for packaging aerogel felt, and preparation method therefor

Abstract

Disclosed in the present invention are an environmental friendly and flame-retardant coating for packaging an aerogel felt and a preparation method therefor. The coating comprises the following components in parts by weight: 30-60 parts of a high-performance resin dispersion, 5-15 parts of a water-based color paste, 20-60 parts of a filler slurry, 6-10 parts of a flame retardant, 0.1-2 parts of a pH regulator, 0.1-2 parts of an auxiliary, and 0-20 parts of water. By using a combination of a resin dispersion having a tensile strength of 10 N / mm2 or more and an elongation at break of 800% or more and a filler slurry, a flame retardant and other auxiliaries in the present invention, the prepared coating has the properties of a flame retardant grade reaching UL94V0, a flexibility of no cracking under 180° bending, and a shear strength of 0.8 MPa or more. In addition, the coating conforms to the application trend of environmentally friendly materials, can achieve the convenient coating of glass fibers, carbon fibers and PAN pre-oxidized fiber-based aerogel felts by means of dip coating, spray coating, roller coating or shower coating, and can be used for heat insulation packaging of a battery pack for a new energy automobile, thereby greatly reducing the battery application risk of the new energy automobile.

Description

Environmentally friendly flame retardant coating for aerogel felt packaging and preparation method thereof Technical Field

[0001] The present invention relates to the technical field of coatings, and in particular to an encapsulation coating and a preparation method thereof, and in particular to an environmentally friendly flame-retardant coating for aerogel felt encapsulation and a preparation method thereof. Background Art

[0002] New energy vehicle batteries are composed of multiple battery cells connected in series or parallel to form a battery module or directly form a battery pack. During use, there is a risk that a single battery cell may generate heat due to internal or external failure. This heat is then transferred to adjacent battery cells, causing heat accumulation, which can lead to thermal runaway of the module or even the entire battery pack, resulting in fire or explosion. Therefore, installing thermal insulation sheets between battery cells and modules has become a mainstream solution. Aerogel, a material with excellent thermal insulation properties, is a preferred thermal insulation material.

[0003] Aerogel is an advanced nanomaterial with a three-dimensional network structure. Its unique porous and loose structure gives it extremely low density and thermal conductivity, high specific surface area, high porosity, and adjustable thermal and electrical conductivity. Currently, aerogel is widely used in chemistry, optics, electricity, nuclear reactions, aerospace, life sciences, transportation, clothing and decoration, and construction as a thermal and sound insulation material, optical material, catalyst carrier, and other fields. However, due to its inherent structural strength, aerogel needs to be prepared into a felt for practical application.

[0004] Aerogel mats are flexible thermal insulation mats made from glass fiber, carbon fiber, ceramic glass fiber wool, or pre-oxidized fiber mats, in which silica or metal aerogels are generated in situ in a supercritical environment. However, aerogel mats are prone to shedding, so when used as a filler between cells in new energy vehicle battery packs, they require encapsulation to prevent shedding. Furthermore, the flame retardant properties of the encapsulating material must be considered when encapsulating aerogel mats to ensure cell safety. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention aims to provide an environmentally friendly flame retardant coating for aerogel felt packaging and a preparation method thereof.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] In a first aspect, the present invention provides an environmentally friendly flame-retardant coating for aerogel felt packaging, comprising the following components in parts by weight:

[0008] Preferably, the high performance resin dispersion has a tensile strength of 10 N / mm2 A resin dispersion having a breaking elongation of 800% or more and a minimum film-forming temperature of 0°C or more.

[0009] More preferably, the high performance resin dispersion has a tensile strength of 10 N / mm 2 A resin dispersion having a breaking elongation of 1000% or more and a minimum film-forming temperature of 0°C or more.

[0010] Preferably, the resin dispersion is selected from at least one of polyurethane dispersion, epoxy dispersion, polyester dispersion, acrylic emulsion, and silicone emulsion.

[0011] More preferably, the polyurethane dispersion comprises at least one of a polycarbonate polyurethane dispersion, a polyether polyurethane dispersion, an aliphatic anionic / nonionic polyurethane dispersion, an anionic aliphatic polyether polyurethane dispersion, and an anionic MDI polyether polyurethane dispersion;

[0012] The epoxy dispersion includes at least one of bisphenol A modified epoxy dispersions;

[0013] The polyester dispersion includes at least one of an acrylic modified polyester dispersion and an epoxy modified polyester dispersion.

[0014] More preferably, the resin dispersion is a polyurethane dispersion.

[0015] Preferably, the aqueous color paste includes aqueous black paste, aqueous iron red paste, aqueous yellow paste, aqueous blue paste, aqueous purple paste, and aqueous white paste, but is not limited thereto. The addition of aqueous color paste is based on the color matching, and aqueous color pastes of different colors can be selected according to the color requirements of the product, and the present invention does not impose any particular limitation.

[0016] Preferably, the filler slurry comprises the following components in parts by weight:

[0017] Preferably, the pigment and filler is selected from at least one of barium sulfate, talc, titanium dioxide and carbon black.

[0018] Preferably, the defoaming agent is selected from at least one of mineral oil defoaming agents and modified polyether-modified silicone.

[0019] More preferably, the matting powder is selected from E1011, OK520, and TS100.

[0020] Preferably, the dispersant is selected from polyether-modified silicones.

[0021] Preferably, the weight ratio of the matting powder to the dispersant is 1:0.5-1.

[0022] Preferably, the pigment and filler include the following raw material components in parts by weight: 0-30 parts of barium sulfate, 0-35 parts of talc, and 0-10 parts of titanium dioxide; wherein the parts by weight of barium sulfate, talc, and titanium dioxide are not all 0 parts at the same time;

[0023] The defoaming agent is selected from at least one of BYK032, Airex 902W, BYK022, and BYK028;

[0024] The dispersant is selected from at least one of BYK190, BYK346, BYK347, and BYK349.

[0025] Preferably, the method for preparing the filler slurry comprises the following steps: adding pigments, fillers, matting powder, defoaming agent, dispersant and water weighed in parts by weight into a grinder, and grinding and dispersing to prepare the filler slurry.

[0026] Preferably, in the environmentally friendly flame-retardant coating for aerogel felt packaging, the weight ratio of the high-performance resin dispersion to the filler slurry is 1:0.3-1.5.

[0027] More preferably, the weight ratio of the high performance resin dispersion to the filler slurry is 1:0.6-1.5.

[0028] Preferably, in the environmentally friendly flame-retardant coating for aerogel felt packaging, the flame retardant is selected from at least one of alkyl phosphate, Mg(OH)2, and aluminum phosphate flame retardants.

[0029] Preferably, in the environmentally friendly flame-retardant coating for aerogel felt packaging, the pH regulator is selected from at least one of dimethylethanolamine (DMEA), 2-amino-2-methyl-1-propanol, ammonia water, and triethylamine.

[0030] Preferably, in the environmentally friendly flame-retardant coating for aerogel felt packaging, the additives include a defoaming agent, a dispersant, and a rheological additive.

[0031] More preferably, the defoaming agent is selected from at least one of mineral oil defoaming agents and modified polyether-modified silicones; specifically, it can be selected from at least one of BYK032, Airex 902W, BYK022, and BYK028.

[0032] More preferably, the dispersant is selected from polyether-modified siloxane; specifically, it can be selected from at least one of BYK190, BYK346, BYK347, and BYK349.

[0033] More preferably, the rheological additive is selected from at least one of RDS, ASE-60, HV-30, and RHEOLATE 299.

[0034] Preferably, the environmentally friendly flame retardant coating for aerogel felt packaging comprises the following components in parts by weight:

[0035] Preferably, the environmentally friendly flame-retardant coating for aerogel felt packaging further comprises 0-8 parts of a cosolvent; based on the film-forming properties, the cosolvent may be appropriately added according to the specific coating system selected to promote film formation.

[0036] More preferably, the cosolvent is selected from one or more of ethylene glycol butyl ether, diethylene glycol butyl ether, propylene glycol methyl ether, and dipropylene glycol methyl ether, but is not limited thereto.

[0037] In a second aspect, the present invention further provides a method for preparing an environmentally friendly flame retardant coating for aerogel felt packaging, comprising the following steps:

[0038] A. Mixing the resin dispersion, additives, and water weighed in parts by weight, and dispersing at high speed to prepare a high shear water-based base;

[0039] B. Add the aqueous color paste, filler paste and flame retardant weighed in parts by weight to the high-shear aqueous base prepared in step A, disperse at high speed, and then add a pH regulator to control the pH at 8.0-8.5 to obtain the environmentally friendly flame retardant coating for aerogel felt packaging.

[0040] In a third aspect, the present invention also provides a method for packaging aerogel felt, comprising the following steps: applying the aforementioned environmentally friendly flame retardant coating on the surface of the aerogel felt by dipping, spraying, roller coating or flow coating to achieve packaging of the aerogel felt.

[0041] In a fourth aspect, the present invention further provides a thermal insulation pad comprising an aerogel felt and the aforementioned environmentally friendly flame-retardant coating; the environmentally friendly flame-retardant coating is coated on the surface of the aerogel felt for encapsulating the aerogel felt.

[0042] In the present invention, the aerogel felt is a composite material obtained by in-situ generating SiO2 aerogel in a supercritical environment based on glass fiber, carbon fiber, and polyacrylonitrile pre-oxidized yarn. This material has excellent thermal insulation performance.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] 1) The present invention adopts a tensile strength of 10N / mm 2The above resin dispersion with an elongation at break of more than 800%, a filler slurry, a flame retardant and other additives are combined to prepare a coating with a pH of 8.0 to 8.5, a solid content of 40 to 65%, a viscosity of 2800 to 4200 mPa·s, and a drying condition of 60°C to 80°C*10 to 30 min. It also has a flame retardancy rating of UL94V0, a ​​flexibility of no cracking under 180° bending, and a shear strength of more than 0.8 MPa (see the results in Table 7).

[0045] 2) The present invention further achieves the following coatings under various conditions (including different aging conditions): flame retardancy rating of UL94V0, flexibility without cracking under 180° bending, and shear strength of more than 0.8 MPa (see results in Tables 7-11), through specific selection of resin dispersion, specific selection of ratio of resin dispersion to filler slurry, specific selection of flame retardant content, and specific selection of ratio of matting powder to dispersant in filler slurry (see results in Tables 7-11). The shear strength is even better, reaching more than 1.0, which meets different usage scenarios.

[0046] 3) In addition, the present invention further achieves a 60° gloss of less than 6GU by selecting a high-performance resin dispersion and optimizing its ratio with the filler slurry.

[0047] 4) The present invention is based on the development of environmentally friendly flame-retardant coatings for aerogel felt packaging, which is in line with the application trend of environmentally friendly materials. It can achieve convenient coating of glass fiber, carbon fiber and PAN pre-oxidized silk-based aerogel felt by dipping, spraying, roller coating or curtain coating, and can be used for thermal insulation packaging of battery packs for new energy vehicles, thereby greatly reducing the battery application risks of new energy vehicles. DETAILED DESCRIPTION

[0048] The present invention will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several variations and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0049] The terms "preferred," "preferably," "more preferred," and the like, used herein, refer to embodiments of the invention that may provide certain benefits under certain circumstances. However, other embodiments may also be preferred under the same or other circumstances. Furthermore, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.

[0050] It should be understood that, except in any operating examples, or where otherwise indicated, all numbers indicating, for example, the amounts of ingredients used in the description and claims should be understood to be modified in all cases by the term "about". Therefore, unless otherwise indicated, the numerical parameters set forth in the following description and the appended claims are approximate values ​​that vary according to the desired properties to be obtained by the present invention. At least without attempting to limit the application of the doctrine of equivalents to the scope of the claims, each numerical parameter should at least be interpreted in light of the number of reported significant figures and by applying ordinary rounding techniques.

[0051] Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the invention are approximations, the numerical values ​​set forth in the specific examples are reported as precisely as possible. Any numerical value, however, inherently contains certain errors necessarily resulting from the standard deviation found in their respective testing measurements.

[0052] In a specific embodiment of the present invention, an environmentally friendly flame retardant coating for aerogel felt packaging is provided, comprising the following components in parts by weight:

[0053] The filler slurry comprises the following components in parts by weight:

[0054] Specifically, in the environmentally friendly flame-retardant coating for aerogel felt packaging, the weight percentage of the high-performance resin dispersion used can be any one of 30 parts, 35 parts, 40 parts, 45 parts, 50 parts, 55 parts, and 60 parts, or a range formed by any two parts. The weight percentage of the water-based color paste can be any one of 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, and 15 parts, or a range formed by any two parts. The weight percentage of the filler slurry can be any one of 20 parts, 25 parts, 30 parts, 35 parts, 40 parts, 45 parts, 50 parts, 55 parts, and 60 parts, or a range formed by any two parts. The weight percentage of the flame retardant can be any one of 6 parts, 7 parts, 8 parts, 9 parts, and 10 parts, or a range formed by any two parts. The weight ratio of the auxiliary agent can be any one of 0.1 parts, 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 part, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, or 2 parts, or a range formed by any two of these values. The weight ratio of water can be any one of 0 parts, 1 part, 5 parts, 10 parts, 15 parts, or 20 parts, or a range formed by any two of these values.

[0055] In the filler slurry, the weight ratio of the pigment and filler used can be any one of 30 parts, 35 parts, 40 parts, 45 parts, and 50 parts, or a range formed by any two parts. The weight ratio of the matting powder can be any one of 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, and 20 parts, or a range formed by any two parts. The weight ratio of the defoaming agent can be any one of 2 parts, 3 parts, 4 parts, and 5 parts, or a range formed by any two parts. The weight ratio of the dispersant can be any one of 5 parts, 7 parts, 10 parts, 12 parts, 15 parts, and 17 parts, or a range formed by any two parts. The weight proportion of water can be any one of 20 parts, 25 parts, 30 parts, 35 parts, and 40 parts, or a range formed by any two parts. More preferably, the weight proportion of water is the amount required to make up 100 parts by weight of the filler slurry.

[0056] In a specific embodiment, the weight ratio of the matting powder to the dispersant in the filler slurry is 1:0.5-1, specifically any one of 1:0.5, 1:0.6, 1:0.7, 1:0.8, 1:0.9, 1:1, or a range formed by any two ratios.

[0057] In one embodiment, the high performance resin dispersion has a tensile strength of 10 N / mm 2 A resin dispersion having a breaking elongation of 800% or more and a minimum film-forming temperature of 0°C or more.

[0058] In one embodiment, the high performance resin dispersion has a tensile strength of 10 to 50 N / mm 2 A resin dispersion having the above, an elongation at break of 800 to 1500%, and a minimum film-forming temperature of 0 to 10°C.

[0059] In one embodiment, the high performance resin dispersion has a tensile strength of 10 to 32 N / mm 2 A resin dispersion having the above, an elongation at break of 1000 to 1400%, and a minimum film-forming temperature of 0 to 5°C.

[0060] In one embodiment, the high performance resin dispersion has a tensile strength of 10 N / mm 2 At least one of the polyurethane dispersion, epoxy dispersion, polyester dispersion, acrylic emulsion, and silicone emulsion having an elongation at break of 800% or more and a minimum film-forming temperature of 0°C or more.

[0061] In a specific embodiment, the polyurethane dispersion can be selected from at least one of polycarbonate polyurethane dispersions, polyether polyurethane dispersions, aliphatic anionic / non-ionic polyurethane dispersions, anionic aliphatic polyether polyurethane dispersions, and anionic MDI polyether polyurethane dispersions; the epoxy dispersion can be selected from at least one of bisphenol A modified epoxy dispersions; and the polyester dispersion can be selected from at least one of acrylic modified polyester dispersions and epoxy modified polyester dispersions.

[0062] In one embodiment, the weight ratio of the high-performance resin dispersion to the filler slurry is 1:0.3-1.5, and can be any one of 1:0.3, 1:0.36, 1:0.5, 1:0.67, 1:0.8, 1:0.9, 1:1, 1:1.1, 1:1.2, 1:1.3, 1:1.4, and 1:1.5, or a range formed by any two of these ratios. More preferably, the weight ratio of the high-performance resin dispersion to the filler slurry is 1:0.6-1.5. Within this weight ratio, a low-gloss coating (1-6 GU) can be obtained.

[0063] In the following examples, the raw materials and sources used in the specific coating preparation are as follows:

[0064] Resin dispersion 1 has a tensile strength of 32 N / mm 2 , elongation at break 1400%, minimum film forming temperature (MFFT) of 0°C, polyether polyurethane dispersion, model U 4101, purchased from Alberdingk Company.

[0065] Resin dispersion 2 has a tensile strength of 38 N / mm 2 , elongation at break 894%, MFFT 5℃ polyether polyurethane dispersion, model Bio PU-697* was purchased from Stahl, Germany.

[0066] Resin dispersion 3 has a tensile strength of 30 N / mm 2 , elongation at break 1000%, MFFT 0℃, aliphatic anionic / nonionic polyurethane dispersion, model UH 2305 was purchased from Covestro AG, Germany.

[0067] Resin dispersion 4 has a tensile strength of 40 N / mm 2 , elongation at break 800%, MFFT 0℃ aliphatic anionic / nonionic polyurethane dispersion, model 3040, purchased from Covestro AG, Germany.

[0068] Resin dispersion 5 has a tensile strength of 31 N / mm 2 , elongation at break 500%, MFFT 0℃ polyether polyurethane dispersion, model PU 401 was purchased from Covestro AG, Germany.

[0069] Resin dispersion 6 has a tensile strength of 15 N / mm 2 , elongation at break 1100%, MFFT 0℃ anionic aliphatic polyether polyurethane dispersion, model Purchased from Wanhua Company.

[0070] Resin dispersion 7 has a tensile strength of 25 N / mm 2 , elongation at break 1100%, MFFT 0℃ anionic MDI type polyether polyurethane dispersion, model Purchased from Wanhua Company.

[0071] Resin dispersion 8 is 44N / mm 2 , elongation at break 650%, MFFT 0℃ polyether polyurethane dispersion, model U502VP was purchased from Alberdingk.

[0072] Resin dispersion 9 is 18N / mm 2 , elongation at break 600%, MFFT 0℃ polycarbonate polyurethane dispersion, model U3700VP, purchased from Alberdingk Company.

[0073] Resin dispersion 10 is 40N / mm 2 , elongation at break 850%, MFFT 0℃ polyether polyurethane dispersion, model U 475, purchased from Alberdingk Company.

[0074] Resin dispersion 11 has a tensile strength of 19 N / mm 2 , elongation at break 800%, MFFT 0℃ polyether polyurethane dispersion, model U 2101, purchased from Alberdingk Company.

[0075] Resin dispersion 12 is 10N / mm 2 , elongation at break 1000%, MFFT 0°C, polyether polyurethane dispersion, model W-6061, purchased from Mitsui Chemicals.

[0076] The tensile strength and elongation at break of the above-mentioned resin dispersions are test data provided by the product or data obtained by testing by the applicant.

[0077] Water-based high-pigment black paste (Fresh Black EI0600-1) was purchased from Zhejiang Namei New Materials Co., Ltd.

[0078] Alkyl phosphate was purchased from Jiangsu Weiguan New Material Technology Co., Ltd.

[0079] Mg(OH)2 was purchased from Weifang Haililong Magnesium Industry Co., Ltd.

[0080] Aluminum phosphate flame retardant was purchased from Clariant Chemicals (China) Co., Ltd.

[0081] Dimethylethanolamine (DMEA) was purchased from BASF.

[0082] The defoaming agent is modified polyether-modified siloxane, model Airex 902W, purchased from Tego.

[0083] The dispersant is polyether-modified siloxane, model BYK-349 and BYK-190, purchased from BYK.

[0084] Rheological additives are RDS sheet silicate was purchased from BYK. Or the rheological additive was ASE-60, purchased from Dow Chemical.

[0085] The particle size of barium sulfate was 3000 mesh and was purchased from Yangzhou Yuxin Powder Company.

[0086] The particle size of talcum powder was 3000 mesh and was purchased from Yangzhou Yuxin Powder Company.

[0087] Titanium dioxide is rutile titanium dioxide Ti-Pure TM R-902+ was purchased from The Chemours Company, USA.

[0088] The matting powder model is E1011, purchased from Tosoh Corporation of Japan.

[0089] Example 1

[0090] This example provides an environmentally friendly flame-retardant coating for aerogel felt packaging. The weight proportions of its components are shown in Table 1. This example examines the properties of coatings 1-12 prepared using different resin dispersions.

[0091] Table 1

[0092] Note: 50% DMEA refers to a 50% DMEA aqueous solution by weight. The addition amount in Table 1 is the weight part of 50% DMEA, which is equivalent to 0.25 parts by weight of DMEA; 10% RDS refers to a 10% RDS aqueous dispersion by weight. The addition amount in Table 1 is the weight part of 10% RDS, which is equivalent to 0.6 parts by weight of RDS; the amount of DMEA added can be adjusted according to the pH of the coating within the range of 8.0 to 8.5, and the amount of RDS can be adjusted according to the viscosity of the coating.

[0093] In Table 1, the filler slurry used is prepared by mixing the raw materials listed in Table 2 in proportions by weight.

[0094] Table 2

[0095] The preparation method of the coating 1-12 specifically comprises the following steps:

[0096] 1) The resin dispersion, 10% RDS (i.e., 10% RDS aqueous dispersion), Airex 902W, and BYK-349 weighed according to the weight proportions listed in Table 1 were mixed and dispersed at high speed to prepare a uniform high-shear aqueous binder;

[0097] 2) Barium sulfate, talc, titanium dioxide, E1011, BYK-349, BYK-190, and water weighed according to the weight parts in Table 2 were added to a grinder and ground and dispersed to prepare a filler slurry. The fineness was determined to be less than 20 μm according to "GB / T 1724-2019 Paints, varnishes and printing inks - Determination of fineness of grind".

[0098] 3) Add water-based high-pigment black slurry, filler slurry and alkyl phosphate in step 1 as shown in Table 1 and disperse at high speed. According to "GB / T 1724-2019 Paints, varnishes and printing inks - Determination of fineness of grinding", the fineness is determined to be less than 20 μm, and the pH is adjusted to 8.0-8.5 by 50% DMEA (i.e., a 50% DMEA aqueous solution) to obtain the environmentally friendly flame retardant coating for aerogel encapsulation.

[0099] Example 2

[0100] This embodiment provides an environmentally friendly flame-retardant coating for aerogel felt packaging, the weight proportions of the components of which are shown in Table 3 for coating 13, wherein the filler slurry used is the same as that in Table 2 of Example 1. The preparation method of coating 13 is the same as that of Example 1.

[0101] Example 3

[0102] This embodiment provides an environmentally friendly flame-retardant coating for aerogel felt packaging, the weight proportions of the components of which are shown in coating 14 in Table 3, wherein the filler slurry used is the same as that in Table 2 of Example 1. The preparation method of coating 14 is the same as that of Example 1.

[0103] Example 4

[0104] This embodiment provides an environmentally friendly flame-retardant coating for aerogel felt packaging, the weight proportions of the components of which are shown in Table 3 for coating 15, wherein the filler slurry used is the same as that in Table 2 of Example 1. The preparation method of coating 15 is the same as that of Example 1.

[0105] Example 5

[0106] This embodiment provides an environmentally friendly flame-retardant coating for aerogel felt packaging, the weight proportions of the components of which are shown in coating 16 in Table 3, wherein the filler slurry used is the same as that in Table 2 of Example 1. The preparation method of coating 16 is the same as that of Example 1.

[0107] Example 6

[0108] This embodiment provides an environmentally friendly flame-retardant coating for aerogel felt packaging, the weight proportions of the components of which are shown in Table 3 for coating 17, wherein the filler slurry used is the same as that in Table 2 of Example 1. The preparation method of coating 17 is the same as that of Example 1.

[0109] Example 7

[0110] This embodiment provides an environmentally friendly flame-retardant coating for aerogel felt packaging, the weight proportions of the components of which are shown in Table 3 for coating 18, wherein the filler slurry used is the same as that in Table 2 of Example 1. The preparation method of coating 18 is the same as that of Example 1.

[0111] Table 3

[0112] Example 8

[0113] This embodiment provides an environmentally friendly flame-retardant coating for aerogel felt packaging. The components and weight proportions thereof are the same as those of Coating 1 in Table 1, with the only difference being that the filler slurry used in preparing Coating 19 in this embodiment is formulated as shown in Table 4. The preparation method of Coating 19 is the same as that of Example 1.

[0114] Example 9

[0115] This embodiment provides an environmentally friendly flame-retardant coating for aerogel felt packaging. The components and weight proportions thereof are the same as those of coating 1 in Table 1, with the only difference being that the filler slurry used in preparing coating 20 in this embodiment is formulated as shown in Table 4. The preparation method of coating 29 is the same as that of Example 1.

[0116] Example 10

[0117] This embodiment provides an environmentally friendly flame-retardant coating for aerogel felt packaging. The components and weight proportions thereof are the same as those of coating 1 in Table 1, with the only difference being that the filler slurry used in preparing coating 21 in this embodiment is formulated as shown in Table 4. The preparation method of coating 21 is the same as that of Example 1.

[0118] Example 11

[0119] This embodiment provides an environmentally friendly flame-retardant coating for aerogel felt packaging. The components and weight proportions thereof are the same as those of coating 1 in Table 1, with the only difference being that the filler slurry used in preparing coating 22 in this embodiment is formulated as shown in Table 4. The preparation method of coating 22 is the same as that of Example 1.

[0120] Table 4

[0121] Example 12

[0122] This embodiment provides an environmentally friendly flame-retardant coating for aerogel felt packaging, the weight proportions of the components of which are shown in Table 5, and the filler slurry used is formulated as shown in Table 6, to obtain coating 23. The preparation steps of coating 23 are the same as those of Example 1.

[0123] Example 13

[0124] This embodiment provides an environmentally friendly flame-retardant coating for aerogel felt packaging, the weight proportions of the components of which are shown in Table 5, and the filler slurry used is formulated as shown in Table 6, to obtain coating 24. The preparation steps of coating 24 are the same as those of Example 1.

[0125] Example 14

[0126] This embodiment provides an environmentally friendly flame-retardant coating for aerogel felt packaging, the weight proportions of the components of which are shown in Table 5, and the filler slurry used is formulated as shown in Table 6, to obtain coating 25. The preparation steps of coating 25 are the same as those of Example 1.

[0127] Example 15

[0128] This embodiment provides an environmentally friendly flame-retardant coating for aerogel felt packaging, the weight proportions of the components of which are shown in Table 5, and the filler slurry used is formulated as shown in Table 6, to obtain coating 26. The preparation steps of coating 26 are the same as those of Example 1.

[0129] Table 5

[0130] Table 6

[0131] Performance Verification:

[0132] 1) The coatings prepared in the above examples were subjected to performance tests, wherein the solid content test was conducted in accordance with GB / T 1725-2007, and the viscosity test was conducted in accordance with GB / T 2794-2022. The results are shown in Table 7.

[0133] Table 7

[0134] After forming the coatings prepared in each of the above examples into films, the film properties of each coating were tested. The flame retardancy was tested according to UL 94, the flexibility was tested according to GB / T 1731-2020, the shear strength was tested according to ISO 22970-2019 (shear rate of 5 mm / min), and the thermal conductivity was tested according to ASTM C518.

[0135] The coatings prepared in each of the above examples were applied to the surface of the aerogel felt by dip coating. The aerogel felt was then encapsulated. The gloss and hardness of the encapsulated coatings were then tested. Gloss was tested using ASTM D523 (60° gloss), and hardness was tested using ASTM D3363 (pencil hardness). The results are shown in Table 8.

[0136] Table 8

[0137] 3) The film prepared in step 2) was subjected to temperature and humidity aging tests. The low-temperature test standard was GB / T 2423.1-2008, the high-temperature test standard was GB / T 2423.2-2008, and the humidity and heat resistance performance was based on GB / T 2423.3-2008. The performance test results of the films prepared from each coating after being subjected to different aging test conditions are shown in Tables 9-11.

[0138] Table 9

[0139] Table 10

[0140] Table 11

[0141] The present invention has many specific application paths, and the above is only a preferred embodiment of the present invention. It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the scope of protection of the present invention. For those skilled in the art, several improvements can be made without departing from the principles of the present invention, and these improvements should also be considered as the scope of protection of the present invention.

Claims

1. An environmentally friendly flame retardant coating for aerogel felt packaging, characterized in that: The composition comprises the following components in parts by weight:

2. The environmentally friendly flame retardant coating for aerogel felt packaging according to claim 1, characterized in that: The high performance resin dispersion has a tensile strength of 10 N / mm 2 A resin dispersion having a breaking elongation of 800% or more and a minimum film-forming temperature of 0°C or more.

3. The environmentally friendly flame retardant coating for aerogel felt packaging according to claim 2, characterized in that: The high performance resin dispersion has a tensile strength of 10 N / mm 2 A resin dispersion having a breaking elongation of 1000% or more and a minimum film-forming temperature of 0°C or more.

4. The environmentally friendly flame retardant coating for aerogel felt packaging according to claim 2 or 3, characterized in that: The resin dispersion is selected from at least one of polyurethane dispersion, epoxy dispersion, polyester dispersion, acrylic emulsion and silicone emulsion.

5. The environmentally friendly flame retardant coating for aerogel felt packaging according to claim 4, characterized in that: The polyurethane dispersion includes at least one of a polycarbonate polyurethane dispersion, a polyether polyurethane dispersion, an aliphatic anionic / nonionic polyurethane dispersion, an anionic aliphatic polyether polyurethane dispersion, and an anionic MDI polyether polyurethane dispersion; The epoxy dispersion includes at least one of bisphenol A-type modified epoxy dispersions; The polyester dispersion includes at least one of an acrylic modified polyester dispersion and an epoxy modified polyester dispersion.

6. The environmentally friendly flame retardant coating for aerogel felt packaging according to claim 1, characterized in that: The water-based color paste includes water-based black paste, water-based iron red paste, water-based yellow paste, water-based blue paste, water-based purple paste, and water-based white paste.

7. The environmentally friendly flame retardant coating for aerogel felt packaging according to claim 1, characterized in that: The filler slurry comprises the following components in parts by weight:

8. The environmentally friendly flame retardant coating for aerogel felt packaging according to claim 7, characterized in that: The pigment and filler are selected from at least one of barium sulfate, talcum powder, titanium dioxide and carbon black; The defoamer is selected from at least one of a mineral oil defoamer and a modified polyether-modified siloxane; The matting powder is selected from E1011, OK520, and TS100; The dispersant is selected from polyether-modified siloxane; The weight ratio of the matting powder to the dispersant is 1:0.5-1.

9. The environmentally friendly flame retardant coating for aerogel felt packaging according to claim 7, characterized in that: The pigment and filler include the following raw material components in parts by weight: 0-30 parts of barium sulfate, 0-35 parts of talc powder, and 0-10 parts of titanium dioxide; wherein the parts by weight of barium sulfate, talc powder, and titanium dioxide are not all 0 parts at the same time; The defoamer is selected from at least one of BYK032, Airex 902W, BYK022 and BYK028; The dispersant is selected from at least one of BYK190, BYK346, BYK347 and BYK349.

10. The environmentally friendly flame retardant coating for aerogel felt packaging according to claim 7, 8 or 9, characterized in that: The method for preparing the filler slurry comprises the following steps: adding pigments, fillers, matting powder, defoaming agent, dispersant and water weighed in parts by weight into a grinder, and grinding and dispersing to prepare the filler slurry.

11. The environmentally friendly flame retardant coating for aerogel felt packaging according to claim 1 or 7, characterized in that: The weight ratio of the high-performance resin dispersion to the filler slurry is 1:0.3-1.

5.

12. The environmentally friendly flame retardant coating for aerogel felt packaging according to claim 11, characterized in that: The weight ratio of the high performance resin dispersion to the filler slurry is 1:0.6-1.

5.

13. The environmentally friendly flame retardant coating for aerogel felt packaging according to claim 1, characterized in that: The flame retardant is selected from at least one of alkyl phosphate, Mg(OH)2, and aluminum phosphate flame retardants; The pH regulator is selected from at least one of dimethylethanolamine, 2-amino-2-methyl-1-propanol, ammonia water, and triethylamine.

14. The environmentally friendly flame retardant coating for aerogel felt packaging according to claim 1, characterized in that: The auxiliary agents include defoamers, dispersants and rheological additives.

15. The environmentally friendly flame retardant coating for aerogel felt packaging according to claim 14, characterized in that: The defoamer is selected from at least one of a mineral oil defoamer and a modified polyether-modified siloxane; The dispersant is selected from polyether-modified siloxane; The rheological additive is selected from at least one of RDS, ASE-60, HV-30, and RHEOLATE 299.

16. The environmentally friendly flame retardant coating for aerogel felt packaging according to claim 15, characterized in that: The defoamer is selected from at least one of BYK032, Airex 902W, BYK022 and BYK028; The dispersant is selected from at least one of BYK190, BYK346, BYK347 and BYK349.

17. The environmentally friendly flame retardant coating for aerogel felt packaging according to claim 14, 15 or 16, characterized in that: The composition comprises the following components in parts by weight:

18. The environmentally friendly flame retardant coating for aerogel felt packaging according to claim 1, characterized in that: The coating also includes 0-8 parts of a cosolvent; The co-solvent is selected from one or more of ethylene glycol butyl ether, diethylene glycol butyl ether, propylene glycol methyl ether, and dipropylene glycol methyl ether.

19. A method for preparing an environmentally friendly flame-retardant coating for aerogel felt packaging according to any one of claims 1 to 18, characterized in that: The following steps are involved: A. Mixing the resin dispersion, additives and water weighed in parts by weight, and dispersing at high speed to prepare a high shear water-based base material; B. Add the water-based color paste, filler paste and flame retardant weighed by weight to the high-shear water-based base prepared in step A, disperse at high speed, and then add a pH adjuster to control the pH at 8.0-8.5 to obtain the environmentally friendly flame retardant coating for aerogel encapsulation.

20. A method for packaging aerogel felt, characterized in that: The method comprises the following steps: applying the environmentally friendly flame retardant coating according to any one of claims 1 to 18 on the surface of the aerogel felt by dipping, spraying, rolling or pouring, so as to achieve encapsulation of the aerogel felt.

21. A thermal insulation pad, characterized in that: It comprises an aerogel felt and the environmentally friendly flame-retardant coating according to any one of claims 1 to 18; the environmentally friendly flame-retardant coating is coated on the surface of the aerogel felt for encapsulating the aerogel felt.

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