Raw material for preparing adhesive, adhesive and preparation method of adhesive

Abstract

The invention discloses a raw material for preparing an adhesive, the adhesive and a preparation method of the adhesive, relates to the technical field of flame-retardant high polymer materials, and aims to solve the problem that the cohesiveness and flame retardance of the adhesive are difficult to balance and optimize. The raw materials for preparing the adhesive comprise the following materials in parts by weight: 51 to 61 parts of tert-butyl acrylate, 4.8 to 5.2 parts of ethyl acrylate, 45 to 55 parts of ethyl acetate, 23.8 to 24.2 parts of vinyl acetate, 13 to 15 parts of 2-ethyl octyl acrylate, 1.9 to 2.3 parts of acrylic acid, 9 to 11 parts of acrylic polyether phosphate, 0.54 to 0.66 part of an initiator and 22 to 26 parts of ammonium polyphosphate.

Description

Technical Field

[0001] The present application relates to the technical field of flame retardant polymer materials, and in particular to a raw material for preparing an adhesive, an adhesive and a preparation method thereof. Background Art

[0002] Adhesives with flame retardant properties have been widely used in various fields of society, but they still have some shortcomings. The flame retardancy of the adhesive can be improved by adding flame retardant materials (such as inorganic materials) to the adhesive formula, but it will lead to a decrease in peel adhesion, making it difficult to balance and optimize the adhesion and flame retardancy of the adhesive, affecting the performance of the adhesive. Summary of the invention

[0003] The purpose of the present application is to provide a raw material for preparing an adhesive, an adhesive and a preparation method thereof, aiming to solve the problem that it is difficult to balance and optimize the adhesion and flame retardancy of the adhesive.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions:

[0005] In the first aspect, the present application provides a raw material for preparing an adhesive. The raw material for preparing an adhesive includes the following materials in parts by weight: 51 to 61 parts of tert-butyl acrylate, 4.8 to 5.2 parts of ethyl acrylate, 45 to 55 parts of ethyl acetate, 23.8 to 24.2 parts of vinyl acetate, 13 to 15 parts of 2-ethyloctyl acrylate, 1.9 to 2.3 parts of acrylic acid, 9 to 11 parts of acrylic acid polyether phosphate, 0.54 to 0.66 parts of initiator, and 22 to 26 parts of ammonium polyphosphate.

[0006] In the raw materials for preparing the adhesive provided in the embodiment of the present application, 51 to 61 parts of tert-butyl acrylate, 4.8 to 5.2 parts of ethyl acrylate, 13 to 15 parts of 2-ethyloctyl acrylate and 1.9 to 2.3 parts of acrylic acid are used as monomers. Under the action of 0.54 to 0.66 parts of initiator, the double bonds in the monomers react with the free radicals generated by the initiator to form a macromolecular polymer chain, and a cross-linking reaction is carried out to form a three-dimensional cross-linked network macromolecular chain with high strength, so that the thermal stability and heat resistance of the adhesive are improved; and 23.8 to 24.2 parts of vinyl acetate and 45 to 55 parts of ethyl acetate can adjust the reaction viscosity, improve fluidity and processability, and form hydrogen bonds with acrylic acid through its acetate group to improve adhesion. The polyether chain and phosphorus-containing group in the acrylic polyether phosphate of 9 to 11 parts can improve rheology and reduce the burning length, and improve the adhesion and flame retardant properties of the adhesive.

[0007] In addition, the phosphorus and nitrogen elements in 22 to 26 parts of ammonium polyphosphate can interact with the carboxyl or alcohol hydroxyl groups on the polymer chain through hydrogen bonds to form crosslinks, thereby improving the adhesion and mechanical properties of the adhesive. Ammonium polyphosphate can decompose and release non-combustible gases (such as water vapor and ammonia) when burned, thereby reducing the flammability of the adhesive and improving the flame retardant properties.

[0008] Therefore, through the combined action of the above-mentioned 251 to 61 parts of tert-butyl acrylate, 4.8 to 5.2 parts of ethyl acrylate, 13 to 15 parts of 2-ethyloctyl acrylate, 1.9 to 2.3 parts of acrylic acid, 0.54 to 0.66 parts of initiator, 23.8 to 24.2 parts of vinyl acetate, 45 to 55 parts of ethyl acetate, 9 to 11 parts of acrylic acid polyether phosphate and 22 to 26 parts of ammonium polyphosphate, the adhesive has a high degree of crosslinking, good adhesion and high flame retardant properties.

[0009] In some embodiments, the raw materials used to prepare the adhesive include the following materials in parts by weight: 56 parts of tert-butyl acrylate, 5 parts of ethyl acrylate, 50 parts of ethyl acetate, 24 parts of vinyl acetate, 14 parts of 2-ethyloctyl acrylate, 2.1 parts of acrylic acid, 10 parts of acrylic polyether phosphate, 0.6 parts of initiator and 24 parts of ammonium polyphosphate.

[0010] In some embodiments, the initiator includes: tert-butyl benzoyl peroxide.

[0011] In some embodiments, the raw materials used to prepare the adhesive further include the following materials in parts by weight: 5.4 to 6.6 parts of solvent, 72 to 88 parts of deionized water, and 4.5 to 5.5 parts of additives.

[0012] In some embodiments, the auxiliary agent includes: 0.9 to 1.1 parts of dispersant, 0.9 to 1.1 parts of anti-settling agent, and 2.7 to 3.3 parts of defoaming agent.

[0013] In some embodiments, the anti-settling agent includes: organic bentonite.

[0014] In some embodiments, the dispersant includes: polypropylene alcohol.

[0015] In some embodiments, the defoaming agent includes: a carbodiimide.

[0016] In some embodiments, the solvent includes at least one of xylene, toluene, and butanol.

[0017] In a second aspect, the present application provides a method for preparing an adhesive. Using the raw materials for preparing an adhesive in any of the above embodiments, the method comprises:

[0018] Under protective gas, tert-butyl acrylate, ethyl acrylate, xylene, vinyl acetate, 2-ethyloctyl acrylate, acrylic acid and acrylic polyether phosphate are added into a solvent, an initiator is added, and a solution containing a phosphorus-type acrylate copolymer is generated by reaction.

[0019] An ammonium polyphosphate slurry is provided.

[0020] The solution containing the phosphorus-type acrylate copolymer and the ammonium polyphosphate slurry are mixed and dried to obtain an adhesive.

[0021] It can be understood that the beneficial effects that can be achieved by the method for preparing the adhesive provided in the above embodiments of the present application can refer to the beneficial effects of the raw materials used to prepare the adhesive mentioned above, and will not be repeated here.

[0022] In some embodiments, an initiator is added to react to generate a solution containing a phosphorus-type acrylate copolymer, and the reaction temperature ranges from 65°C to 90°C.

[0023] In some embodiments, an initiator is added to react to generate a solution containing a phosphorus-type acrylate copolymer, including:

[0024] Add the first volume of initiator solution in the temperature range of 80° C. to 90° C. and react at a constant temperature.

[0025] The temperature is lowered to a temperature range of 65° C. to 75° C., a second volume of initiator solution is added, and the reaction is carried out at a constant temperature to obtain a solution containing a phosphorus-type acrylate copolymer. The initiator solution is a solution in which the initiator is dissolved in ethyl acetate.

[0026] In some embodiments, the ratio of the first volume to the second volume ranges from 1:4 to 1.

[0027] In some embodiments, providing the ammonium polyphosphate slurry includes: dispersing and grinding deionized water, ethyl acetate, ammonium polyphosphate, a dispersant, an anti-settling agent, and a defoaming agent to obtain the ammonium polyphosphate slurry.

[0028] In a third aspect, the present application provides an adhesive prepared by the method for preparing an adhesive as described in any of the above embodiments.

[0029] It can be understood that the beneficial effects that can be achieved by the adhesive provided in the above embodiments of the present application can refer to the beneficial effects of the raw materials used to prepare the adhesive mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 A flow chart of a method for preparing an adhesive is provided for this application. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] In the present application, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, article or device including the element.

[0034] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0035] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0036] In recent years, with the rapid development of my country's aerospace, electronics, civil construction, automobile industry and other fields, people have become more aware of the risk of fire. The development of adhesives with better flame retardant properties has become the focus of research in recent years. Whether it is the bonding of various interiors of aircraft and automobiles in the transportation field, or the bonding of parts in household appliances and electronic products, higher flame retardant performance requirements are put forward for adhesives.

[0037] In some examples, the flame retardancy of the adhesive can be improved by adding flame retardant materials (such as inorganic materials) to the adhesive formula, but this will lead to a decrease in peel adhesion, making it difficult to balance and optimize the adhesion and flame retardancy of the adhesive, affecting the performance of the adhesive.

[0038] Based on this, the embodiment of the present application provides a raw material for preparing an adhesive. The raw material for preparing an adhesive includes the following materials in parts by weight: 51 to 61 parts of tert-butyl acrylate, 4.8 to 5.2 parts of ethyl acrylate, 45 to 55 parts of ethyl acetate, 23.8 to 24.2 parts of vinyl acetate, 13 to 15 parts of 2-ethyloctyl acrylate, 1.9 to 2.3 parts of acrylic acid, 9 to 11 parts of acrylic acid polyether phosphate, 0.54 to 0.66 parts of initiator, and 22 to 26 parts of ammonium polyphosphate.

[0039] For example, the amount of tert-butyl acrylate may be 51 parts, 53 parts, 55 parts, 57 parts, 59 parts or 61 parts, etc., which is not limited here.

[0040] For example, the amount of ethyl acrylate may be 4.8 parts, 4.9 parts, 5 parts, 5.1 parts, or 5.2 parts, etc., which is not limited here.

[0041] For example, the amount of ethyl acetate may be 45 parts, 47 parts, 50 parts, 51 parts, 53 parts or 55 parts, etc., which is not limited here.

[0042] For example, the amount of vinyl acetate may be 23.8 parts, 23.9 parts, 24.0 parts, 24.1 parts or 24.2 parts, etc., which is not limited here.

[0043] For example, the amount of 2-ethyloctyl acrylate may be 13 parts, 13.5 parts, 14 parts, 14.5 parts, or 15 parts, etc., which is not limited here.

[0044] For example, the amount of acrylic acid may be 1.9 parts, 2 parts, 2.1 parts, 2.2 parts, or 2.3 parts, etc., which is not limited herein.

[0045] For example, the acrylic polyether phosphate may be 9 parts, 9.5 parts, 10 parts, 10.5 parts, or 11 parts, etc., which is not limited here.

[0046] For example, the amount of the initiator may be 0.54 parts, 0.57 parts, 0.6 parts, 0.63 parts, or 0.66 parts, etc., which is not limited here.

[0047] For example, the amount of ammonium polyphosphate can be 22 parts, 23 parts, 24 parts, 25 parts or 26 parts, etc., which is not limited here.

[0048] It can be understood that 51 to 61 parts of tert-butyl acrylate, 4.8 to 5.2 parts of ethyl acrylate, 13 to 15 parts of 2-ethyloctyl acrylate and 1.9 to 2.3 parts of acrylic acid are used as monomers. Under the action of 0.54 to 0.66 parts of initiator, the double bonds in the monomers react with the free radicals generated by the initiator to form macromolecular polymer chains, and cross-linking reactions are carried out to form three-dimensional cross-linked network macromolecular chains with high strength, so that the thermal stability and heat resistance of the adhesive are improved; and 23.8 to 24.2 parts of vinyl acetate and 45 to 55 parts of ethyl acetate can adjust the reaction viscosity, improve fluidity and processability, and form hydrogen bonds with acrylic acid through its acetate group to improve adhesion. The polyether chain and phosphorus-containing group in 9 to 11 parts of acrylic polyether phosphate can improve rheology and reduce burning length, and improve the adhesion and flame retardant properties of the adhesive.

[0049] In addition, the phosphorus and nitrogen elements in 22 to 26 parts of ammonium polyphosphate can interact with the carboxyl or alcohol hydroxyl groups on the polymer chain through hydrogen bonds to form crosslinks, thereby improving the adhesion and mechanical properties of the adhesive. Ammonium polyphosphate can decompose and release non-combustible gases (such as water vapor and ammonia) when burned, thereby reducing the flammability of the adhesive and improving the flame retardant properties.

[0050] Therefore, through the combined action of the above-mentioned 251 to 61 parts of tert-butyl acrylate, 4.8 to 5.2 parts of ethyl acrylate, 13 to 15 parts of 2-ethyloctyl acrylate, 1.9 to 2.3 parts of acrylic acid, 0.54 to 0.66 parts of initiator, 23.8 to 24.2 parts of vinyl acetate, 45 to 55 parts of ethyl acetate, 9 to 11 parts of acrylic acid polyether phosphate and 22 to 26 parts of ammonium polyphosphate, the adhesive has a high degree of crosslinking, good adhesion and high flame retardant properties.

[0051] In some embodiments, the raw materials used to prepare the adhesive include the following materials in parts by weight: 56 parts of tert-butyl acrylate, 5 parts of ethyl acrylate, 50 parts of ethyl acetate, 24 parts of vinyl acetate, 14 parts of 2-ethyloctyl acrylate, 2.1 parts of acrylic acid, 10 parts of acrylic polyether phosphate, 0.6 parts of initiator and 24 parts of ammonium polyphosphate.

[0052] It can be understood that, through the above arrangement, the cross-linking degree of the adhesive is further increased, thereby improving the adhesiveness and flame retardancy of the adhesive.

[0053] In some embodiments, the initiator includes: tert-butyl benzoyl peroxide.

[0054] Tert-butyl benzoyl peroxide is an organic peroxide that decomposes under heating or light conditions to generate benzyl radicals and tert-butyl radicals. These radicals react with double bonds in tert-butyl acrylate, ethyl acrylate, 2-ethyloctyl acrylate and acrylic acid to form polymer chains. This process can be repeated to form large molecular polymers, making the adhesive production process more efficient.

[0055] In some embodiments, the raw materials used to prepare the adhesive further include the following materials in parts by weight: 5.4 to 6.6 parts of solvent, 72 to 88 parts of deionized water, and 4.5 to 5.5 parts of additives.

[0056] For example, the solvent may be 5.4 parts, 5.8 parts, 6 parts, 6.2 parts, 6.4 parts or 6.6 parts, etc., which is not limited here.

[0057] Exemplarily, the amount of deionized water may be 72 parts, 76 parts, 80 parts, 84 parts, or 88 parts, etc., which is not limited here.

[0058] For example, the amount of the auxiliary agent may be 4.5 parts, 4.7 parts, 5 parts, 5.3 parts or 5.5 parts, etc., which is not limited here.

[0059] It can be understood that 5.4 to 6.6 parts of solvent can dissolve the organic materials in the raw materials for preparing the adhesive, so that the materials for preparing the adhesive form a uniform system, which is conducive to the formation of a uniform adhesive; the solvent can also dilute the reaction system for preparing the adhesive, reduce the viscosity, improve the fluidity of the reaction system, and allow the reaction between the raw materials to proceed smoothly. 72 to 88 parts of deionized water can dissolve the inorganic materials (such as ammonium polyphosphate) in the raw materials for preparing the adhesive to promote the reaction and improve the uniformity of the reaction. 4.5 to 5.5 parts of additives can improve the processing properties of the adhesive and further improve the bonding properties of the adhesive.

[0060] In some embodiments, the auxiliary agent includes: 0.9 to 1.1 parts of dispersant, 0.9 to 1.1 parts of anti-settling agent, and 2.7 to 3.3 parts of defoaming agent.

[0061] For example, the dispersant may be 0.9 parts, 1 parts, or 1.1 parts, etc., which is not limited here.

[0062] For example, the amount of the anti-settling agent may be 0.9 parts, 1 parts, or 1.1 parts, etc., which is not limited here.

[0063] For example, the defoaming agent may be 2.7 parts, 2.9 parts, 3 parts, 3.1 parts or 3.3 parts, etc., which is not limited here.

[0064] It can be understood that 0.9 to 1.1 parts of dispersant can improve the uniformity of the raw materials for preparing the adhesive in the solvent and deionized water, prevent precipitation and aggregation, and thus improve the stability and fluidity of the adhesive. 0.9 to 1.1 parts of anti-settling agent can prevent the raw materials for preparing the adhesive (such as ammonium polyphosphate) from settling in the adhesive. 2.7 to 3.3 parts of defoamer can eliminate bubbles generated by the mixing process of the raw materials of the adhesive, thereby reducing the formation of bubbles during the reaction process and improving the quality of the adhesive.

[0065] In some embodiments, the anti-settling agent includes: organic bentonite.

[0066] It can be understood that the organic bentonite has a flaky edge that can absorb lipophilic long-chain organic matter and form a good affinity with the adhesive. At the same time, the oxygen and hydroxyl groups in the organic bentonite can form hydrogen bonds with an anti-settling effect, making the adhesive a uniform colloid with a certain viscosity, thereby preventing the sedimentation of solid particles in the adhesive.

[0067] In some embodiments, the dispersant includes: polypropylene alcohol.

[0068] It can be understood that the polypropylene alcohol molecule is hydrophilic and lipophilic. Through its long chain structure, it wraps around the surface of the solid particles in the adhesive to form a stable particle suspension, making it difficult for the solid particles to aggregate or precipitate, effectively improving the dispersibility of the solid particles in the adhesive and making them evenly distributed.

[0069] In some embodiments, the defoaming agent includes: a carbodiimide.

[0070] It can be understood that carbodiimide can not only interact with the surface of bubbles to reduce surface tension, causing small bubbles to merge into larger bubbles and eventually burst, thereby eliminating bubbles, but also form a stable network structure with the adhesive to reduce the probability of new bubble formation, thereby improving the overall fluid consistency and uniformity of the raw material system of the adhesive with bubbles eliminated, thereby improving the bonding performance of the adhesive.

[0071] In some embodiments, the solvent includes at least one of toluene, xylene, and butanol.

[0072] It can be understood that toluene, xylene and butanol have strong solubility and can dissolve the raw materials used to prepare the adhesive well, so that the raw materials of the adhesive form a dispersed system with good compatibility.

[0073] The embodiment of the present application provides a method for preparing an adhesive, using the raw materials for preparing the adhesive in any of the above embodiments, such as Figure 1 As shown, the preparation method of the adhesive includes: S1 to S3.

[0074] S1: Under protective gas, tert-butyl acrylate, ethyl acrylate, xylene, vinyl acetate, 2-ethyloctyl acrylate, acrylic acid and acrylic polyether phosphate are added to a solvent, an initiator is added, and the reaction is performed to generate a solution containing a phosphorus-type acrylate copolymer.

[0075] Exemplarily, the reaction temperature ranges from 65°C to 90°C.

[0076] For example, the reaction temperature can be 65° C., 70° C., 75° C., 80° C., 85° C. or 90° C., etc., but is not limited thereto.

[0077] S2: providing ammonium polyphosphate slurry.

[0078] S3: Mixing the solution containing the phosphorus-type acrylate copolymer and the ammonium polyphosphate slurry, and drying to obtain an adhesive.

[0079] In some embodiments, an initiator is added to S1, and the reaction generates a solution containing a phosphorus-type acrylate copolymer, including the following steps (1) and (2).

[0080] Step (1): adding a first volume of initiator solution at a temperature ranging from 80°C to 90°C and reacting at a constant temperature.

[0081] Illustratively, the temperature may be 80° C., 83° C., 85° C., 88° C. or 90° C., etc., but is not limited thereto.

[0082] Step (2): cooling the mixture to a temperature range of 65° C. to 75° C., adding a second volume of initiator solution, and reacting at a constant temperature to obtain a solution containing a phosphorus-type acrylate copolymer. The initiator solution is a solution in which the initiator is dissolved in ethyl acetate.

[0083] For example, the temperature may be 65° C., 68° C., 70° C., 73° C., or 75° C., etc., but is not limited thereto.

[0084] It can be understood that step (1) is a relatively high temperature initiation stage. In the temperature range of 80°C to 90°C, the system is heated to promote the decomposition of the initiator, thereby generating free radicals, which will start the polymerization reaction. In this stage, the first volume of initiator solution is added. Since the initiator is dissolved in ethyl acetate, ethyl acetate as a solvent not only helps to evenly disperse the initiator, but also participates in the polymerization reaction and affects the structure of the polymer chain; and it is maintained at a constant temperature for a period of time to ensure that the initiator is fully decomposed and initiates the polymerization reaction between the monomers (such as phosphorus-containing acrylate monomers).

[0085] Step (2) is a relatively low temperature maintenance stage. After completing the relatively high temperature initiation stage, the system is cooled to 65° C. to 75° C. This relatively low temperature range helps control the rate of the polymerization reaction, allowing the reaction to proceed smoothly, and helps to obtain a polymer with a higher molecular weight. At this stage, a second volume of initiator solution is added to further promote the polymerization reaction and ensure complete conversion of the monomers. The system is then kept at a constant temperature for a period of time to avoid uneven and incomplete reaction of the phosphorus-type acrylate copolymer and to ensure the formation of the phosphorus-type acrylate and sufficient reaction.

[0086] In some embodiments, the ratio of the first volume to the second volume ranges from 1:4 to 1.

[0087] Illustratively, the ratio of the first volume to the second volume may be 1:4, 1:3, 1:2, or 1:1, etc., which is not limited here.

[0088] It can be understood that through the above arrangement, the decomposition of the initiator and the start of the polymerization reaction can be promoted in step (1), which is a higher temperature initiation stage, while the reaction rate can be controlled in step (2), which is a lower temperature maintenance stage, to ensure the quality and performance of the adhesive.

[0089] In some embodiments, S2 provides ammonium polyphosphate slurry including: dispersing and grinding deionized water, ethyl acetate, ammonium polyphosphate, a dispersant, an anti-settling agent and a defoaming agent to obtain the ammonium polyphosphate slurry.

[0090] It can be understood that, through the above steps, ammonium polyphosphate slurry can be effectively prepared to ensure its uniformity and stability.

[0091] The raw material used to prepare the adhesive is an adhesive prepared by the adhesive preparation method in any of the above embodiments, and the adhesive has good adhesiveness and high flame retardancy.

[0092] The adhesive is described in further detail below by taking specific embodiments as examples.

[0093] Example 1

[0094] Embodiment 1 provides an adhesive. The raw materials used to prepare the adhesive include:

[0095] The preparation method includes: 56 parts of tert-butyl acrylate, 5 parts of ethyl acrylate, 50 parts of ethyl acetate, 6 parts of xylene, 24 parts of vinyl acetate, 14 parts of 2-ethyloctyl acrylate, 2.1 parts of acrylic acid, 10 parts of acrylic acid polyether phospholipid, 0.6 parts of initiator, 80 parts of deionized water, 24 parts of ammonium polyphosphate, 1 part of dispersant, 1 part of anti-settling agent and 3 parts of defoaming agent.

[0096] The preparation method of the adhesive comprises:

[0097] Step 1: Add 56 parts of tert-butyl acrylate, 5 parts of ethyl acrylate, 30 parts of ethyl acetate, 6 parts of xylene, 24 parts of vinyl acetate, 14 parts of 2-ethyloctyl acrylate, 2.1 parts of acrylic acid, and 10 parts of acrylic acid polyether phospholipids to a 500mL three-necked flask equipped with a stirrer, a reflux condenser, a thermometer, a constant pressure dropping funnel, and a nitrogen conduit. Pass nitrogen, stir, and heat to 85°C. When reflux occurs, add 1 / 3 volume of the initiator solution dissolved in ethyl acetate (including 5 parts of ethyl acetate and 0.6 parts of initiator), react at a constant temperature for 1.0 hour, and then cool to 70°C for 2 hours; finally, add the remaining 2 / 3 volume of the initiator solution, react for 1.5 hours, and then cool to 30°C to obtain a phosphorus-bound acrylate copolymer solution.

[0098] Step 2: Add 80 parts of deionized water, 15 parts of ethyl acetate, 24 parts of ammonium polyphosphate, 1 part of dispersant, 1 part of anti-settling agent and 3 parts of auxiliary agent into a 2L dispersion tank, disperse for 1 hour, and after the dispersion is completed, grind in a grinder for 5 hours to obtain ammonium phosphate slurry.

[0099] Step 3: Add the phosphorus-bound acrylate copolymer solution into the ammonium polyphosphate slurry to evenly disperse it to obtain an emulsion.

[0100] Step 4: Dry the emulsion to obtain an adhesive.

[0101] Performance Testing

[0102] In order to verify the performance of the adhesive of Example 1 of the present application, the following initial adhesion, holding force, peel strength and flame retardancy tests were performed:

[0103] The initial adhesion test was conducted according to Method A of GB / T 4852-2002 "Pressure-sensitive Adhesive Tape Initial Adhesion Test Method (Rolling Ball Method)". The adhesive of Example 1 was pasted onto a polyester film to prepare an adhesive tape. Three samples with a length of 300 mm and a width of 60 mm were cut and the steel ball number was tested using the inclined rolling ball method.

[0104] The holding test was conducted according to Method A of GB / T 4851-2014 "Test Method for Holding Adhesion of Adhesive Tapes". The adhesive of Example 1 was pasted onto a polyester film to prepare an adhesive tape. Three specimens with a length of 150 mm and a width of 12 mm were cut to test the holding adhesion of the adhesive tape to a vertical standard steel plate.

[0105] The peel strength test was conducted according to Method 1 of GB / T 2792-2014 "Test Method for Peel Strength of Adhesive Tapes". The adhesive of Example 1 was pasted onto a polyester film to prepare an adhesive tape. Three 300 mm long specimens were cut, and one end of the adhesive tape was pressed and attached to one end of a stainless steel plate. After the state was adjusted, the test was started, and the measured peel strength was recorded.

[0106] The flame retardancy test was conducted in accordance with GB / T 15903-1995 "Test method for flame retardancy of pressure-sensitive adhesive tapes - hanging method". The adhesive of Example 1 was pasted onto a polyester film to prepare an adhesive tape with a length of 300 mm and a width of 25 mm. The freely hanging adhesive tape was ignited with a ignition fuel, and the burning length was recorded.

[0107] Table 1 Performance test results of Example 1

[0108]

[0109] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A raw material for preparing an adhesive, characterized in that: The invention comprises the following materials in parts by weight: 51 to 61 parts of tert-butyl acrylate, 4.8 to 5.2 parts of ethyl acrylate, 45 to 55 parts of ethyl acetate, 23.8 to 24.2 parts of vinyl acetate, 13 to 15 parts of 2-ethyloctyl acrylate, 1.9 to 2.3 parts of acrylic acid, 9 to 11 parts of acrylic acid polyether phosphate, 0.54 to 0.66 parts of initiator and 22 to 26 parts of ammonium polyphosphate.

2. The raw material for preparing an adhesive according to claim 1, characterized in that: The invention comprises the following materials in parts by weight: 56 parts of tert-butyl acrylate, 5 parts of ethyl acrylate, 50 parts of ethyl acetate, 24 parts of vinyl acetate, 14 parts of 2-ethyloctyl acrylate, 2.1 parts of acrylic acid, 10 parts of acrylic acid polyether phosphate, 0.6 parts of initiator and 24 parts of ammonium polyphosphate.

3. The raw material for preparing an adhesive according to claim 1, characterized in that: The initiator includes: tert-butyl benzoyl peroxide.

4. The raw material for preparing an adhesive according to claim 1, characterized in that: The invention also includes the following materials in parts by weight: 5.4 to 6.6 parts of solvent, 72 to 88 parts of deionized water and 4.5 to 5.5 parts of auxiliary agent.

5. The raw material for preparing an adhesive according to claim 4, characterized in that: The auxiliary agent includes: 0.9 to 1.1 parts of dispersant, 0.9 to 1.1 parts of anti-settling agent, and 2.7 to 3.3 parts of defoaming agent.

6. The raw material for preparing an adhesive according to claim 5, characterized in that: The anti-settling agent includes: organic bentonite.

7. The raw material for preparing an adhesive according to claim 5, characterized in that: The dispersant includes: polypropylene alcohol.

8. The raw material for preparing an adhesive according to claim 5, characterized in that: The defoaming agent includes carbodiimide.

9. The raw material for preparing an adhesive according to claim 4, characterized in that: The solvent includes at least one of xylene, toluene, and butanol.

10. A method for preparing an adhesive, characterized in that: Using the raw material for preparing an adhesive as described in any one of claims 1 to 9, the method comprises: Under protective gas, tert-butyl acrylate, ethyl acrylate, xylene, vinyl acetate, 2-ethyloctyl acrylate, acrylic acid and acrylic acid polyether phosphate are added to a solvent, an initiator is added, and a solution containing a phosphorus-type acrylate copolymer is reacted to form; providing ammonium polyphosphate slurry; The solution containing the phosphorus-type acrylate copolymer and the ammonium polyphosphate slurry are mixed and dried to obtain an adhesive.

11. The method for preparing the adhesive according to claim 10, characterized in that: The initiator is added to react to generate a solution containing a phosphorus-type acrylate copolymer, and the reaction temperature range is 65° C. to 90° C.

12. The method for preparing the adhesive according to claim 11, characterized in that: The adding of the initiator to react and generate a solution containing the phosphorus-type acrylate copolymer comprises: Adding a first volume of initiator solution at a temperature ranging from 80° C. to 90° C. and reacting at a constant temperature; The temperature is lowered to a temperature range of 65° C. to 75° C., a second volume of initiator solution is added, and the reaction is carried out at a constant temperature to obtain a solution containing a phosphorus-type acrylate copolymer; wherein the initiator solution is a solution in which the initiator is dissolved in ethyl acetate.

13. The method for preparing the adhesive according to claim 12, characterized in that: The ratio of the first volume to the second volume is in the range of 1:4-1.

14. The method for preparing the adhesive according to claim 10, characterized in that: The method of providing the ammonium polyphosphate slurry comprises: dispersing and grinding deionized water, ethyl acetate, ammonium polyphosphate, a dispersant, an anti-settling agent and a defoaming agent to obtain the ammonium polyphosphate slurry.

15. An adhesive, characterized in that: The adhesive is prepared by the method for preparing an adhesive according to any one of claims 10 to 14.

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