Flame-retardant water-based spray neoprene adhesive as well as preparation method and application thereof
By pre-dispersing antimony trioxide dispersion with tackifying resin and combining it with halogen compounds, the problems of poor flame retardant properties and unstable storage of water-based neoprene spray adhesives were solved. A flame-retardant water-based neoprene spray adhesive that meets the requirements of aircraft materials was prepared, which has excellent flame retardant properties and stability, and is environmentally friendly without organic solvents.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ANHUI YILIKAITAI NEW MATERIALS CO LTD
- Filing Date
- 2026-01-14
- Publication Date
- 2026-05-12
AI Technical Summary
Existing water-based neoprene spray adhesives have poor flame retardant properties, and the addition of flame retardants leads to unstable storage.
Flame-retardant waterborne chloroprene spray adhesive was prepared by pre-dispersing antimony trioxide dispersion with tackifying resin and combining it with halogen compounds to improve flame retardant properties through antimony-halogen synergistic effect. Furthermore, surface treatment was used to enhance the hydrophilicity and dispersibility of antimony trioxide and avoid demulsification.
It achieves excellent flame retardant properties, meets the aircraft material combustion performance test FAR 25.853, improves product storage stability, increases initial tack and strength build-up speed, and is free of organic solvents, environmentally friendly and odorless.
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Abstract
Description
Technical Field
[0001] This invention relates to the field of adhesives, and in particular to a flame-retardant water-based neoprene spray adhesive, its preparation method, and its application. Background Technology
[0002] Spray adhesives are commonly used in the production of upholstered furniture, car seats, and aircraft seats. Traditional solvent-based spray adhesives contain large amounts of solvents such as ethyl acetate, butanone, toluene, alkanes, and chlorinated alkenes, which can easily remain in the pores of the sponge. This not only causes the finished product to have an unpleasant odor that is harmful to health, but also results in a large amount of VOC emissions during the production process, which poses a great threat to the health of operators and the environment. Furthermore, it also poses significant safety hazards such as the risk of fire.
[0003] Water-based spray adhesive is an environmentally friendly adhesive that uses water as a diluent. It can be used to bond materials such as sponge, PVC, artificial leather, textiles, and wood. Water-based spray adhesive contains no organic solvents, has no irritating odor, is 0VOC, will not corrode polystyrene or other plastic materials, has no effect on the color of textiles, and will not cause textiles to harden or yellow. It has excellent flame retardant properties, is self-extinguishing, and meets the aircraft material flammability test FAR 25.853. While the solvent in water-based spray adhesive is water, through formulation adjustments and the use of professional spray guns, the moisture can be rapidly vaporized, thus achieving drying. Water-based spray adhesive contains environmentally friendly additives such as anti-mildew agents, and dries quickly after spraying, preventing mold growth on leather.
[0004] For example, Chinese invention patent application CN103865439A discloses a two-component water-based chloroprene spray adhesive, which uses water as a solvent, has zero total volatile organic compounds, and high initial tack strength. The preparation process includes the following two steps: dissolving chloroprene latex, polyurethane latex, polymethyl methacrylate latex, water-based tackifying resin, and zinc oxide in deionized water to obtain a composite latex; then adding water-based tackifying resin, stabilizer, thixotropic agent, and ultraviolet absorber to the composite latex to obtain the finished water-based chloroprene spray adhesive; during spraying, adding a water-based curing agent to the finished water-based chloroprene spray adhesive and stirring until homogeneous, making it ready for immediate use.
[0005] However, the flame retardant properties of the aforementioned water-based neoprene spray adhesive do not meet the requirements for aircraft seat bonding materials; if flame retardants are added to the material composition, it will lead to demulsification, making the material storage extremely unstable. Summary of the Invention
[0006] To address the technical problems of poor flame retardant properties and unstable storage of existing water-based chloroprene spray adhesives, this invention provides a flame-retardant water-based chloroprene spray adhesive with excellent flame retardant properties and stable storage, along with its preparation method and application.
[0007] This invention provides a flame-retardant water-based chloroprene spray adhesive, which is composed of the following components in weight percentage: 2% to 5% antioxidant, 2% to 10% flame retardant, 11% to 32% tackifying resin, 1% to 4% thickener, 0.5% to 4% pH adjuster, and the remainder being chloroprene latex.
[0008] Preferably, the tackifying resin is an acrylic resin, a VAE resin, or a combination thereof.
[0009] Preferably, the flame retardant is a nano-antimony trioxide dispersion.
[0010] Preferably, the antioxidant is a p-phenylenediamine antioxidant, a diaryl amine antioxidant, or a combination thereof.
[0011] Preferably, the pH adjuster is one or more of ammonia, amino-2-methyl-1-propanol, and glycine.
[0012] Preferably, the thickener is one or more of fumed silica or silica dispersion.
[0013] This invention also provides a method for preparing flame-retardant water-based chloroprene spray adhesive, which includes the following steps: (1) Preparing antimony trioxide dispersion: using anhydrous ethanol and water as solvents, anhydrous ethanol / water = 9 / 1 (volume ratio), adding antimony trioxide and coupling agent, heating to 55-65℃, stirring for 10-12h, filtering, vacuum drying, grinding, to obtain surface-treated antimony trioxide; after surface modification, it is usually made more "hydrophilic". The reason is that amino groups have strong hydration ability, thereby enhancing the reduction of water contact angle and improving wettability; (2) mixing the treated antimony trioxide with deionized water, dispersing at high speed, and then adding anionic surfactant and thickener in sequence, continuing to disperse, to obtain antimony trioxide dispersion; in this step, antimony trioxide has been dispersed evenly, and there is no need for rapid dispersion when adding it to chloroprene latex, to avoid violent dispersion leading to demulsification; (3) stirring the antimony trioxide dispersion obtained in step (2) and tackifying resin evenly, and adding thickener The agent is used to adjust the pH value to 7-8 to obtain a mixture. Chloroprene emulsion has good stability under alkaline conditions, while the pH value of the tackifying resin is too low. Therefore, the tackifying resin and antimony trioxide dispersion need to be mixed and the overall pH value adjusted before being added to chloroprene latex. (4) The mixture obtained in step (3) is mixed with chloroprene latex, antioxidant and thickener, dispersed, and pH adjuster is added to adjust the pH value to between 9.0 and 9.5 to obtain well dispersed waterborne chloroprene spray adhesive. After filtering with a 200-mesh filter, the finished product is obtained.
[0014] Antimony trioxide, when used alone as a flame retardant, has limited effectiveness; however, when used in combination with halogen compounds, it produces an "antimony-halogen synergistic effect." During the combustion process, the chloroprene emulsion decomposes to produce hydrogen halides. These hydrogen halides react with antimony trioxide to form antimony trichloride, which plays a crucial role in this flame retardant process. First, its decomposition is an endothermic reaction, absorbing a large amount of heat, acting like a heat "sponge" to reduce the polymer's combustion temperature and decomposition rate. Second, antimony trichloride has a high vapor density, allowing it to remain in the gas phase for a longer period, effectively diluting flammable gases. It also coats the polymer surface, forming a protective film that provides insulation and oxygen barrier properties. Furthermore, liquid and solid antimony trichloride particles have a surface effect, reducing flame energy. In the solid or molten polymer layer below the flame, antimony trichloride also promotes char formation, relatively slowing down the rate of polymer decomposition and flammable gas generation. Simultaneously, the resulting char layer seals the polymer, preventing flammable gases from escaping and entering the combustion zone.
[0015] Preferably, the coupling agent in step (1) includes γ-aminopropyltriethoxysilane, aminopropyltriethoxysilane, methacryloyloxypropyltrimethoxysilane, or a combination thereof.
[0016] Preferably, the anionic surfactant in step (2) is sodium dodecylbenzenesulfonate.
[0017] This invention also provides an application of flame-retardant water-based neoprene spray adhesive as an adhesive material for aircraft seats.
[0018] Beneficial effects of the present invention 1. In this invention, antimony trioxide is processed to obtain an antimony trioxide dispersion, which provides excellent flame retardant properties in the formulation while ensuring stability, meeting the aircraft material combustion performance test FAR 25.853. The product can be stored at room temperature for up to 150 days. A comparison of flame retardant properties is shown in Table 2.
[0019] 2. This invention pre-disperses antimony trioxide dispersion and tackifying resin, then mixes them with aqueous chloroprene emulsion, which improves product stability, reduces formulation costs, and significantly improves initial tack and strength build-up speed. The effects of different tackifying resins on initial tack and strength build-up speed are shown in Table 1.
[0020] 3. The water-based neoprene spray adhesive of the present invention has fast strength build-up, high final bond strength, contains no organic solvents, has no irritating odor, is 0VOC, will not corrode polystyrene and other plastic materials, has no effect on the color of textiles and will not cause textiles to harden or turn yellow, will not cause the surface of sponge to shrink and harden, and can be applied to industries such as new energy vehicles, furniture, aviation, bags, and industrial foam products. Detailed Implementation
[0021] The present invention will be further described below with reference to embodiments, so that those skilled in the art can easily implement the present invention.
[0022] Example 1 A water-based chloroprene spray adhesive comprises the following raw materials in parts by weight: 74 parts chloroprene latex, 2 parts p-phenylenediamine, 4.5 parts antimony trioxide dispersion, 8 parts acrylate emulsion, 8 parts vinyl acetate-ethylene copolymer emulsion, 0.5 parts silica dispersion, 2 parts glycine, and 1 part 2-amino-2-methyl-1-propanol. The preparation method includes the following steps: (1) Preparation of antimony trioxide dispersion (the same below): Anhydrous ethanol and water are used as solvents, anhydrous ethanol / water = 9 / 1 (volume ratio), antimony trioxide and coupling agent γ-aminopropyltriethoxysilane are added, the temperature is raised to 55-65℃, stirred for 10-12h, filtered, vacuum dried, and ground to obtain surface-treated antimony trioxide. (2) The treated antimony trioxide was mixed with deionized water and dispersed at high speed. Then, the anionic surfactant sodium dodecylbenzenesulfonate and the thickener fumed silica were added in sequence and dispersed to obtain an antimony trioxide dispersion (in the following examples, the preparation method of the antimony trioxide dispersion is the same as steps (1) and (2)). (3) Add the measured amount of tackifying resin and antimony trioxide dispersion to the dispersion tank to disperse the raw materials evenly; while stirring, add the measured amount of emulsifier and thickener, and add the pH adjuster in batches, measuring while adding, until the pH value is adjusted to between 7.0 and 8.0 to obtain material A; (4) Add the measured amount of chloroprene latex, antioxidant, rheology modifier, and material A to the dispersion tank and disperse the raw materials evenly; add the pH adjuster in batches, and test while adding, until the pH value is adjusted to between 9.0 and 9.5; filter the dispersed water-based chloroprene spray adhesive through a 200-mesh filter to obtain the finished product.
[0023] Example 2 A water-based chloroprene spray adhesive has the following raw material composition in parts by weight: 79 parts chloroprene latex, 2 parts p-phenylenediamine, 4.5 parts antimony trioxide dispersion, 11 parts acrylate emulsion, 0.5 parts silica dispersion, 2 parts glycine, and 1 part 2-amino-2-methyl-1-propanol.
[0024] The preparation method includes the following steps: (1) Add the measured amount of tackifying resin and antimony trioxide dispersion to the dispersion tank to disperse the raw materials evenly; while stirring, add the measured amount of emulsifier and thickener, and add the pH adjuster in batches, measuring while adding, until the pH value is adjusted to between 7.0 and 8.0 to obtain material A.
[0025] (2) Add the measured amount of chloroprene latex, antioxidant, rheology modifier, and material A to the dispersion tank and disperse the raw materials evenly; add the pH adjuster in batches, and test while adding, until the pH value is adjusted to between 9.0 and 9.5; filter the dispersed water-based chloroprene spray adhesive through a 200-mesh filter to obtain the finished product.
[0026] Example 3 A water-based chloroprene spray adhesive has the following raw material composition in parts by weight: 74 parts chloroprene latex, 2 parts p-phenylenediamine, 4.5 parts antimony trioxide dispersion, 16 parts acrylate emulsion, 0.5 parts silica dispersion, 2 parts glycine, and 1 part 2-amino-2-methyl-1-propanol.
[0027] The preparation method includes the following steps: (1) Add the measured amount of tackifying resin and antimony trioxide dispersion to the dispersion tank to disperse the raw materials evenly; while stirring, add the measured amount of emulsifier and thickener, and add the pH adjuster in batches, measuring while adding, until the pH value is adjusted to between 7.0 and 8.0 to obtain material A.
[0028] (2) Add the measured amount of chloroprene latex, antioxidant, rheology modifier, and material A to the dispersion tank and disperse the raw materials evenly; add the pH adjuster in batches, and test while adding, until the pH value is adjusted to between 9.0 and 9.5; filter the dispersed water-based chloroprene spray adhesive through a 200-mesh filter to obtain the finished product.
[0029] Example 4 A water-based chloroprene spray adhesive has the following raw material composition in parts by weight: 58 parts chloroprene latex, 2 parts p-phenylenediamine, 4.5 parts antimony trioxide dispersion, 32 parts acrylate emulsion, 0.5 parts silica dispersion, 2 parts glycine, and 1 part 2-amino-2-methyl-1-propanol.
[0030] The preparation method includes the following steps: (1) Add the measured amount of tackifying resin and antimony trioxide dispersion to the dispersion tank to disperse the raw materials evenly; while stirring, add the measured amount of emulsifier and thickener, and add the pH adjuster in batches, measuring while adding, until the pH value is adjusted to between 7.0 and 8.0 to obtain material A.
[0031] (2) Add the measured amount of chloroprene latex, antioxidant, rheology modifier, and material A to the dispersion tank and disperse the raw materials evenly; add the pH adjuster in batches, and test while adding, until the pH value is adjusted to between 9.0 and 9.5; filter the dispersed water-based chloroprene spray adhesive through a 200-mesh filter to obtain the finished product.
[0032] Example 5 A water-based chloroprene spray adhesive has the following raw material composition in parts by weight: 58 parts chloroprene latex, 2 parts p-phenylenediamine, 4.5 parts antimony trioxide dispersion, 32 parts vinyl acetate-ethylene copolymer emulsion, 0.5 parts silica dispersion, 2 parts glycine, and 1 part 2-amino-2-methyl-1-propanol.
[0033] The preparation method includes the following steps: (1) Add the measured amount of tackifying resin and antimony trioxide dispersion to the dispersion tank to disperse the raw materials evenly; while stirring, add the measured amount of emulsifier and thickener, and add the pH adjuster in batches, measuring while adding, until the pH value is adjusted to between 7.0 and 8.0 to obtain material A.
[0034] (2) Add the measured amount of chloroprene latex, antioxidant, rheology modifier, and material A to the dispersion tank and disperse the raw materials evenly; add the pH adjuster in batches, and test while adding, until the pH value is adjusted to between 9.0 and 9.5; filter the dispersed water-based chloroprene spray adhesive through a 200-mesh filter to obtain the finished product.
[0035] Example 6 A water-based chloroprene spray adhesive has the following raw material composition in parts by weight: 74 parts chloroprene latex, 2 parts p-phenylenediamine, 4.5 parts antimony trioxide dispersion, 16 parts vinyl acetate-ethylene copolymer emulsion, 0.5 parts silica dispersion, 2 parts glycine, and 1 part 2-amino-2-methyl-1-propanol.
[0036] The preparation method includes the following steps: (1) Add the measured amount of tackifying resin and antimony trioxide dispersion to the dispersion tank to disperse the raw materials evenly; while stirring, add the measured amount of emulsifier and thickener, and add the pH adjuster in batches, measuring while adding, until the pH value is adjusted to between 7.0 and 8.0 to obtain material A.
[0037] (2) Add the measured amount of chloroprene latex, antioxidant, rheology modifier, and material A to the dispersion tank and disperse the raw materials evenly; add the pH adjuster in batches, and test while adding, until the pH value is adjusted to between 9.0 and 9.5; filter the dispersed water-based chloroprene spray adhesive through a 200-mesh filter to obtain the finished product.
[0038] Example 7 A water-based chloroprene spray adhesive has the following raw material composition in parts by weight: 79 parts chloroprene latex, 2 parts p-phenylenediamine, 4.5 parts antimony trioxide dispersion, 11 parts vinyl acetate-ethylene copolymer emulsion, 0.5 parts silica dispersion, 2 parts glycine, and 1 part 2-amino-2-methyl-1-propanol.
[0039] The preparation method includes the following steps: (1) Add the measured amount of tackifying resin and antimony trioxide dispersion to the dispersion tank to disperse the raw materials evenly; while stirring, add the measured amount of emulsifier and thickener, and add the pH adjuster in batches, measuring while adding, until the pH value is adjusted to between 7.0 and 8.0 to obtain material A.
[0040] (2) Add the measured amount of chloroprene latex, antioxidant, rheology modifier, and material A to the dispersion tank and disperse the raw materials evenly; add the pH adjuster in batches, and test while adding, until the pH value is adjusted to between 9.0 and 9.5; filter the dispersed water-based chloroprene spray adhesive through a 200-mesh filter to obtain the finished product.
[0041] Example 8 A water-based chloroprene spray adhesive has the following raw material composition in parts by weight: 70 parts chloroprene latex, 2 parts p-phenylenediamine, 10 parts antimony trioxide dispersion, 8 parts acrylate emulsion, 8 parts vinyl acetate-ethylene copolymer emulsion, 0.5 parts silica dispersion, 2 parts glycine, and 1 part 2-amino-2-methyl-1-propanol.
[0042] The preparation method includes the following steps: (1) Add the measured amount of tackifying resin and antimony trioxide dispersion to the dispersion tank to disperse the raw materials evenly; while stirring, add the measured amount of emulsifier and thickener, and add the pH adjuster in batches, measuring while adding, until the pH value is adjusted to between 7.0 and 8.0 to obtain material A.
[0043] (2) Add the measured amount of chloroprene latex, antioxidant, rheology modifier, and material A to the dispersion tank and disperse the raw materials evenly; add the pH adjuster in batches, and test while adding, until the pH value is adjusted to between 9.0 and 9.5; filter the dispersed water-based chloroprene spray adhesive through a 200-mesh filter to obtain the finished product.
[0044] Example 9 A water-based chloroprene spray adhesive has the following raw material composition in parts by weight: 75.5 parts chloroprene latex, 2 parts p-phenylenediamine, 2 parts antimony trioxide dispersion, 8 parts acrylate emulsion, 8 parts vinyl acetate-ethylene copolymer emulsion, 0.5 parts silica dispersion, 2 parts glycine, and 1 part 2-amino-2-methyl-1-propanol.
[0045] The preparation method includes the following steps: (1) Add the measured amount of tackifying resin and antimony trioxide dispersion to the dispersion tank to disperse the raw materials evenly; while stirring, add the measured amount of emulsifier and thickener, and add the pH adjuster in batches, measuring while adding, until the pH value is adjusted to between 7.0 and 8.0 to obtain material A.
[0046] (2) Add the measured amount of chloroprene latex, antioxidant, rheology modifier, and material A to the dispersion tank and disperse the raw materials evenly; add the pH adjuster in batches, and test while adding, until the pH value is adjusted to between 9.0 and 9.5; filter the dispersed water-based chloroprene spray adhesive through a 200-mesh filter to obtain the finished product.
[0047] Comparative Example 1 A water-based chloroprene spray adhesive comprises the following raw materials in parts by weight: 74 parts chloroprene latex, 2 parts p-phenylenediamine, 4.5 parts nano-antimony trioxide powder, 8 parts acrylate emulsion, 8 parts vinyl acetate-ethylene copolymer emulsion, 0.5 parts silica dispersion, 2 parts glycine, and 1 part 2-amino-2-methyl-1-propanol. The preparation method includes the following steps: (1) Add the measured amount of tackifying resin and nano antimony trioxide powder to the dispersion tank to disperse the raw materials evenly; while stirring, add the measured amount of emulsifier and thickener, and add the pH adjuster in batches, measuring while adding, until the pH value is adjusted to between 7.0 and 8.0 to obtain material A; (2) Add the measured amount of chloroprene latex, antioxidant, rheology modifier, and material A to the dispersion tank and disperse the raw materials evenly; add the pH adjuster in batches, and test while adding, until the pH value is adjusted to between 9.0 and 9.5; filter the dispersed water-based chloroprene spray adhesive through a 200-mesh filter to obtain the finished product.
[0048] Comparative Example 2 A water-based chloroprene spray adhesive comprises the following raw materials in parts by weight: 74 parts chloroprene latex, 2 parts p-phenylenediamine, 4.5 parts antimony trioxide dispersion, 8 parts acrylate emulsion, 8 parts vinyl acetate-ethylene copolymer emulsion, 0.5 parts silica dispersion, 2 parts glycine, and 1 part 2-amino-2-methyl-1-propanol. The preparation method includes the following steps: (1) Add the measured amount of chloroprene latex, antioxidant, tackifying resin and rheology modifier to the dispersion tank and disperse the raw materials evenly; (2) Slowly add the measured amount of antimony trioxide dispersion; (3) Add pH adjuster in batches, and test while adding, until the pH value is adjusted to between 9.0 and 9.5; filter the well dispersed water-based chloroprene spray with a 200-mesh filter to obtain the finished product.
[0049] Comparative Example 3 A water-based chloroprene spray adhesive comprises the following raw materials in parts by weight: 74 parts chloroprene latex, 2 parts p-phenylenediamine, 4.5 parts nano-antimony trioxide powder, 8 parts acrylate emulsion, 8 parts vinyl acetate-ethylene copolymer emulsion, 0.5 parts silica dispersion, 2 parts glycine, and 1 part 2-amino-2-methyl-1-propanol. The preparation method includes the following steps: (1) Add the measured amount of chloroprene latex, antioxidant, tackifying resin and rheology modifier to the dispersion tank and disperse the raw materials evenly; (2) Slowly add the measured amount of nano-antimony trioxide powder; (3) Add pH adjuster in batches, and test while adding, until the pH value is adjusted to between 9.0 and 9.5; filter the well dispersed water-based chloroprene spray with a 200-mesh filter to obtain the finished product.
[0050] Initial tack strength, strength build-up rate, and stability were tested for each of the above embodiments and comparative examples (Table 1).
[0051] Initial tack strength test: A 10*10*5cm high-density sponge sample was used. 1g of water-based neoprene adhesive was evenly sprayed onto the surface, and the sponge was immediately folded in half and pressed for two seconds. The width of the sponge's springback was then observed.
[0052] Strength build-up speed test: A 10*10*5cm high-density sponge sample was used. 1g of water-based neoprene adhesive was evenly sprayed onto the surface, and the same sponge sample was then attached and pressed for two seconds. After 5 minutes, the sponge sample was torn apart, and the breakage rate was calculated. Breakage rate = (Broken area / Sponge area) * 100% Stability test: 200g of gel sample was sealed and stored at 25℃ for 150 days. After the specified time, the 200g gel sample was filtered through a 200-mesh filter. Solid particles were obtained from the filter screen. The surface residue was rinsed with deionized water, and the particles were dried at 130℃ for 30 minutes and then weighed.
[0053] Flame retardant performance testing: Tested according to FAR 25.853 standard. Table 1 sample Retraction width (mm) Breakage rate (%) Particle weight (g) Example 1 0 55 0.002 Example 2 0 48 0.006 Example 3 0 52 0.009 Example 4 2 45 0.008 Example 5 4 47 0.007 Example 6 2 50 0.006 Example 7 1 55 0.006 Example 8 0 53 0.031 Example 9 0 55 0.007 Comparative Example 1 0 52 0.453 Comparative Example 2 0 50 0.256 Comparative Example 3 0 53 2.756 Table 2
[0054] As shown in Table 1, with the increase of vinyl acetate-ethylene copolymer emulsion content, the strength build-up rate of the emulsion first increases and then decreases, but it has an impact on the initial tack. With the increase of acrylate emulsion content, the initial tack strength of the emulsion first increases and then decreases.
[0055] As can be seen from Tables 1 and 2, the nano-antimony trioxide dispersion can ensure flame retardant performance and significantly improve the stability of the formulation compared with antimony trioxide powder.
[0056] As can be seen from Table 1, and from Examples 1 and Comparisons 2 and 3, the stability of the antimony trioxide dispersion is significantly better than that of the antimony trioxide powder after using the two-step method.
[0057] As shown in Table 2, the flame retardant performance improves significantly with increasing flame retardant content, but initial tack and stability decrease significantly.
[0058] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the scope of the claims of the present invention should be within the protection scope of the present invention.
Claims
1. A flame-retardant water-based neoprene spray adhesive, characterized in that... It is composed of the following components by weight percentage: 2% to 5% antioxidant, 2% to 10% flame retardant, 11% to 32% tackifying resin, 1% to 4% thickener, 0.5% to 4% pH adjuster, and the remainder is chloroprene latex.
2. The flame-retardant water-based chloroprene spray adhesive according to claim 1, characterized in that the tackifying resin is acrylic resin, VAE resin, or a combination thereof.
3. The flame-retardant water-based neoprene spray adhesive according to claim 1, characterized in that: The flame retardant is a nano-antimony trioxide dispersion.
4. The flame-retardant water-based neoprene spray adhesive according to claim 1, characterized in that: The antioxidant is a p-phenylenediamine antioxidant, a diaryl amine antioxidant, or a combination thereof.
5. The flame-retardant water-based chloroprene spray adhesive according to claim 1, characterized in that the pH adjuster is one or more of ammonia, amino-2-methyl-1-propanol, and glycine.
6. The flame-retardant water-based chloroprene spray adhesive according to claim 1, characterized in that the thickener is one or more of fumed silica or silica dispersion.
7. The preparation method of the flame-retardant water-based chloroprene spray adhesive as described in claim 1, characterized in that... Includes the following steps: (1) Using anhydrous ethanol and water as solvents, add antimony trioxide and coupling agent, heat, stir, filter, vacuum dry, grind, and obtain surface-treated antimony trioxide; (2) Mix the treated antimony trioxide with deionized water and disperse at high speed. Then add anionic surfactant and thickener in sequence and continue to disperse to obtain antimony trioxide dispersion. (3) Stir the antimony trioxide dispersion obtained in step (2) and the thickening resin evenly, add thickener, adjust the pH value to 7-8, and obtain a mixture; (4) The mixture obtained in step (3) is mixed with chloroprene latex, antioxidant and thickener, dispersed, and pH adjuster is added to adjust the pH value to between 9.0 and 9.5 to obtain well dispersed water-based chloroprene spray adhesive. After filtration, the finished product is obtained.
8. The preparation method of the flame-retardant water-based chloroprene spray adhesive according to claim 7, characterized in that... The coupling agent in step (1) is γ-aminopropyltriethoxysilane, aminopropyltriethoxysilane, methacryloyloxypropyltrimethoxysilane or a combination thereof.
9. The preparation method of the flame-retardant water-based chloroprene spray adhesive according to claim 7, characterized in that... In step (2), the anionic surfactant is sodium dodecylbenzenesulfonate.
10. The application of the flame-retardant water-based neoprene spray adhesive as described in claim 1 as an adhesive material for aircraft seats.