Adhesive for gypsum-based board and preparation method thereof

Abstract

The invention provides an adhesive for a gypsum-based board and a preparation method thereof, and relates to the field of building materials, and the adhesive for the gypsum-based board comprises the following components: modified PUR resin, vacuum plastic-absorbing rubber emulsion, modified gypsum powder, redispersible latex powder, cellulose ether, silica fume, a plasticizer, a defoaming agent, a catalyst for a PUR part and water. The adhesive prepared from the components has relatively high bonding strength, can firmly bond a gypsum-based board substrate with facing materials such as PET (Polyethylene Terephthalate) and the like, and effectively avoids the problems of infirm bonding, hollowing, layering, cracking, falling and the like in the production and use processes of the gypsum-based board substrate and the facing materials such as PET and the like; the quality, the decorative effect and the durability of the gypsum-based board and the stability and the safety of a building structure are improved; by adding the redispersible latex powder, silica fume and other components, the water resistance of the adhesive is improved, the adhesive can still keep good performance in a humid environment, and the service life of the gypsum-based board is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of building materials, and in particular to an adhesive for gypsum-based boards and a preparation method thereof. Background Art

[0002] With the booming development of the modern construction industry, gypsum-based panels have gained widespread application in building decoration and renovation projects due to their exceptional properties, including lightweight, fireproofing, sound insulation, and ability to effectively regulate indoor humidity. Traditional gypsum-based panels, used as partition wall and ceiling substrates, require puttying and painting, resulting in complex processes, long construction cycles, poor working environments, and high labor costs. Gypsum-based panels with self-finishing properties, where the substrate is bonded to finishing materials such as PET, offer a variety of decorative effects and tactile properties. They are environmentally friendly, require no secondary decoration, require prefabricated construction, and have a short construction cycle. Adhesives play a crucial role in the production of these panels.

[0003] However, there are many problems that need to be solved in the adhesives currently available on the market for bonding traditional gypsum-based board substrates to finishing materials such as PET. For example, the bonding strength is poor. During the production process, the gypsum-based board substrate and finishing materials such as PET are not firmly adhered and hollowing occurs. During use, stratification and debonding are very likely to occur between the gypsum-based board substrate and finishing materials such as PET. The water resistance is poor. When in a humid environment, the performance of the adhesive will drop sharply, seriously affecting the service life of the board. In addition, the curing time is long, which not only reduces production efficiency but also greatly increases production costs. Secondly, in traditional adhesive systems, the advantages of PUR adhesives and vacuum plastic adhesives have not yet been fully integrated to solve these technical problems. Therefore, there is an urgent need to develop an adhesive for bonding gypsum-based board substrates to finishing materials such as PET and a preparation method thereof to solve the above problems. Summary of the Invention

[0004] The present invention provides an adhesive for gypsum-based boards and a preparation method thereof, which are used to solve at least one of the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention discloses an adhesive for gypsum-based boards. The components of the adhesive for gypsum-based boards, calculated by weight percentage, include:

[0006] Modified PUR resin, content is 15%-30%;

[0007] Vacuum plastic latex, accounting for 10%-20%;

[0008] Modified gypsum powder, content is 20%-35%;

[0009] Redispersible latex powder, accounting for 5%-10%;

[0010] Cellulose ether, content is 2%-5%;

[0011] Silica fume, accounting for 5%-10%;

[0012] Plasticizer, content is 1%-3%;

[0013] Defoaming agent, accounting for 0.1%-0.5%;

[0014] The catalyst content for PUR is 0.5%-2%;

[0015] Water, content is 10%-20%.

[0016] Preferably, the modified PUR resin needs to be heated to 60-80° C. to ensure that the modification reaction proceeds smoothly.

[0017] Preferably, the vacuum plastic emulsion comprises components of polyurethane emulsion, acrylic emulsion and vinyl acetate-ethylene copolymer emulsion.

[0018] Preferably, the modified gypsum powder is obtained by changing the particle size and shape of the gypsum powder through mechanical crushing and grinding, and adding a chemical modifier such as stearic acid.

[0019] Preferably, the preparation method of the adhesive for gypsum-based board materials as described in any one of the above items comprises the following steps:

[0020] Step S1: Add modified gypsum powder and silica fume into a mixing device and stir at a speed of 500-800 r / min for 10-15 minutes;

[0021] Step S2: adding redispersible latex powder, cellulose ether, plasticizer and defoamer to the mixed materials in step S1, and then stirring at a speed of 300-500 r / min for 15-20 minutes;

[0022] Step S3: Then, in another independent container, heat the modified PUR resin to 60-80° C., add the catalyst and stir evenly;

[0023] Step S4: adding the vacuum plastic latex to the mixed material obtained in step S2, and starting stirring at the same time, controlling the speed at 400-600 r / min, and continuing stirring for 10-15 minutes;

[0024] Step S5: Under continuous stirring, add the modified PUR resin mixture treated in step S3 to the system in step S4 for 10-15 minutes, then increase the speed to 700-900 rpm and continue stirring for 20-30 minutes;

[0025] Step S6: 5-10 minutes before the end of stirring, water is added to adjust the consistency of the adhesive to an appropriate range. After the stirring is completed, the adhesive is filtered through a filtering device to remove possible impurity particles therein, thereby obtaining a finished adhesive.

[0026] Preferably, the stirring device includes: a box body, a plurality of supporting legs fixedly installed on the circumferential side of the bottom of the box body, a supporting ring fixedly installed on the bottom of the box body, the bottom of the turntable is slidably connected to the top of the supporting ring, a driving shaft fixedly installed on the bottom of the turntable, and the lower end of the driving shaft rotates through the bottom of the box body and is fixedly connected to a driven gear, a driving motor is fixedly installed on the bottom of the box body, a driving gear is fixedly installed on the output shaft of the driving motor, and the driving gear is meshed with the driven gear, a shaking mechanism is provided on the right side of the top of the turntable, a mixing drum is fixedly installed on the top of the turntable through a mounting bracket, a storage tank is fixedly installed on the left side of the top of the turntable, and a stirring mechanism is provided on the left side of the top of the box body.

[0027] The cam is fixedly mounted on the left side of the L-shaped bracket, and the cam is fixedly mounted on the top of the L-shaped bracket. The cam is fixedly mounted on the top of the L-shaped bracket. The cam is fixedly mounted on the mounting base, and the output shaft of the servo motor rotates and passes through the front side wall of the mounting base and is fixedly connected to a crank. The lower end of the crank is hinged with a connecting rod, and the I-shaped bracket is fixedly mounted on the left side of the top of the L-shaped bracket. The two slide rails are symmetrically embedded in both sides of the I-shaped bracket above and below, and the first slider and the second slider are respectively slidably connected in the two slide rails, and the middle of the transmission rod is hinged on the side walls of the I-shaped bracket. Slide grooves are respectively provided on the upper and lower sides of the transmission rod, and the first slider and the second slider are respectively slidably connected in the slide grooves one by one through a hinge rod. One end of the connecting rod is hinged to the hinge rod on the first slider, and the first slider and the second slider are hinged to the side walls of the mixing drum through two connecting rods.

[0028] Preferably, the stirring mechanism includes: a mounting plate, the mounting plate is fixedly mounted on the left side of the top of the box body, the fixed end of the hydraulic telescopic rod is fixedly mounted on the top of the mounting plate, one end of the electric guide rail is fixedly mounted on the telescopic end of the hydraulic telescopic rod, the electric slider is slidably connected to the electric guide rail, the fixed plate is fixedly mounted on the side wall of the electric slider, the rotating shaft is mounted on the front side wall of the fixed plate through two mounting blocks, the rotating shaft is rotatably connected to the mounting block, the driving motor is fixedly mounted on the top of the fixed plate, the output shaft of the driving motor is fixedly connected to the upper end of the rotating shaft, and the lower end of the rotating shaft is fixedly mounted with a stirring rod.

[0029] The present invention provides an adhesive for gypsum-based boards and a preparation method thereof. Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The adhesive for gypsum-based panels is composed, by weight, of the following ingredients: modified PUR resin, vacuum plastic latex, modified gypsum powder, redispersible latex powder, cellulose ether, silica fume, plasticizer, defoamer, catalyst for the PUR component, and water. The adhesive prepared using these ingredients exhibits high bond strength and can firmly bond gypsum-based panel substrates to PET and other finishing materials. This effectively prevents loose bonding, hollowing, cracking, or detachment between the gypsum-based panel substrate and PET and other finishing materials during production and use, thereby improving the quality, decorative effect, durability, structural stability, and safety of the gypsum-based panels. The addition of redispersible latex powder and silica fume significantly enhances the adhesive's water resistance, enabling it to maintain good performance even in humid environments and extending the service life of the gypsum-based panels.

[0031] 2. By introducing PUR adhesive and vacuum absorbing plastic ingredients into the adhesive used for gypsum-based boards, it specially modifies conventional PUR resin, greatly improving its affinity with gypsum-based board substrates, PET and other finishing materials, significantly enhancing the initial bonding strength and long-term bonding stability; at the same time, the vacuum absorbing plastic emulsion with an optimized formula enables the adhesive to quickly form a high-strength bonding layer in a vacuum environment, and has good flexibility, adapting to different production equipment and production processes.

[0032] 3. The preparation method of the adhesive for gypsum-based panels can mix the materials in stages. First, the modified gypsum powder and silica fume are mixed, and then the other ingredients are added in sequence. This method ensures that each material can be fully dispersed at a suitable stirring speed and time, avoiding uneven mixing caused by mixing multiple materials at one time. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 A schematic diagram of the components of an adhesive for gypsum-based panels provided by an embodiment of the present invention;

[0035] Figure 2 A schematic diagram of a method for preparing an adhesive for gypsum-based panels provided by an embodiment of the present invention;

[0036] Figure 3 A schematic structural diagram of a mixing device for a gypsum-based board provided in an embodiment of the present invention;

[0037] Figure 4 for Figure 3 A local enlarged schematic diagram of point A in the middle.

[0038] Reference numerals:

[0039] 1. Box body; 2. Support legs; 3. Support ring; 4. Turntable; 5. Drive shaft; 6. Driven gear; 7. Drive motor; 8. Drive gear; 9. Rocking mechanism; 10. Mixing drum; 11. Mounting frame; 12. Storage tank; 13. Mixing mechanism; 14. L-shaped bracket; 15. Mounting seat; 16. Servo motor; 17. Crank; 18. Connecting rod; 19. I-shaped bracket; 20. Slide rail; 21. First slider; 22. Second slider; 23. Transmission rod; 24. Slide groove; 25. Articulated rod; 26. Connecting rod; 27. Mounting plate; 28. Hydraulic telescopic rod; 29. ​​Electric guide rail; 30. Electric slider; 31. Fixed plate; 32. Rotating shaft; 33. Mounting block; 34. Drive motor; 35. Stirring rod. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0041] The present invention provides the following embodiments

[0042] Example 1

[0043] The embodiment of the present invention provides an adhesive for gypsum-based board materials, such as Figure 1 As shown, the components of the adhesive for gypsum-based panels are calculated by weight percentage and include:

[0044] Modified PUR resin, content is 15%-30%;

[0045] Vacuum plastic latex, accounting for 10%-20%;

[0046] Modified gypsum powder, content is 20%-35%;

[0047] Redispersible latex powder, accounting for 5%-10%;

[0048] Cellulose ether, content is 2%-5%;

[0049] Silica fume, accounting for 5%-10%;

[0050] Plasticizer, content is 1%-3%;

[0051] Defoaming agent, accounting for 0.1%-0.5%;

[0052] The catalyst content for PUR is 0.5%-2%;

[0053] Water, content is 10%-20%.

[0054] Preferably, the modified PUR resin needs to be heated to 60-80° C. to ensure that the modification reaction proceeds smoothly.

[0055] Preferably, the vacuum plastic emulsion comprises components of polyurethane emulsion, acrylic emulsion and vinyl acetate-ethylene copolymer emulsion.

[0056] Preferably, the modified gypsum powder is obtained by changing the particle size and shape of the gypsum powder through mechanical crushing and grinding, and adding a chemical modifier such as stearic acid.

[0057] The working principle and beneficial effects of the above technical solution are:

[0058] The adhesive for gypsum-based boards of the present invention is composed of the following components: modified PUR resin, vacuum plastic latex, modified gypsum powder, redispersible latex powder, cellulose ether, silica fume, plasticizer, defoamer, catalyst for PUR part and water. The adhesive prepared by the above components has the following advantages: First, ultra-high bonding strength: The present invention greatly improves the bonding strength of the adhesive through the unique PUR resin modification and the synergistic effect with the vacuum plastic latex, and can firmly bond the gypsum-based board substrate to PET and other finishing materials together, and fundamentally and effectively avoids the problems of weak bonding, hollowing, cracking, and falling between the gypsum-based board substrate and PET and other finishing materials during the production and use of the board, providing a solid guarantee for the stability and safety of the building structure; Second, excellent water resistance: the redispersible latex powder and silica fume and other components work together with the new adhesive system to significantly improve The water resistance of the adhesive enables it to maintain excellent performance in humid environments, greatly extending the service life of gypsum-based boards; third, rapid curing: the optimized PUR resin formula and the precise use of catalysts, combined with the rapid film-forming properties of the vacuum plastic latex, greatly shorten the curing time of the adhesive of the present invention, effectively improve production efficiency, and significantly reduce production costs; third, strong production adaptability: the addition of vacuum plastic latex enables the adhesive to quickly form high-strength bonds in vacuum adsorption production scenarios. At the same time, its good flexibility adapts to gypsum-based boards of different shapes and surface conditions, broadening the application range of production equipment and production processes.

[0059] Among them, the functions of the various components of the above-mentioned adhesive for gypsum-based boards are as follows: Modified gypsum powder: as the main inorganic component of the adhesive, after special modification treatment, its compatibility with other components is greatly improved. It plays the role of strengthening the skeleton structure in the adhesive, and can improve the overall strength and stability of the adhesive, providing basic bonding support for the bonding of gypsum-based board substrates and finishing materials such as PET.

[0060] Silica fume: Silica fume has the characteristics of fine particles and large specific surface area. In adhesives, it can fill the gaps between other particles and act as a micro-aggregate, further enhancing the density of the adhesive and improving its strength, durability and impermeability, thereby improving the adhesive's bonding effect on gypsum-based board substrates and PET and other finishing materials, allowing it to maintain good bonding performance in various environments.

[0061] Redispersible polymer powder: After redispersing in water, it forms a continuous polymer film. This enhances the adhesive's flexibility, making it less susceptible to brittle fracture due to temperature fluctuations, vibration, and other factors after curing. It also increases the adhesive's bond strength, improving its adhesion to gypsum-based board substrates and PET and other finishing materials, strengthening the bond between the adhesive and board, PET, and other finishing materials.

[0062] Cellulose ethers: Cellulose ethers are primarily used to adjust the water retention of adhesives. During preparation and application, they prevent rapid evaporation of moisture from the adhesive, ensuring the adhesive maintains excellent performance over a long period of time and facilitating application and handling. They also improve the adhesive's rheological properties, imparting an appropriate consistency and fluidity, facilitating even application to the surface of gypsum-based board materials and enhancing bonding uniformity and quality.

[0063] Plasticizer: The addition of plasticizer can increase the flexibility of the adhesive. It can reduce the interaction between polymer molecules in the adhesive, making the adhesive softer and more elastic after curing, avoiding bond failure caused by excessive brittleness, and improving the adhesive's adaptability and durability under different environmental conditions.

[0064] Defoamers: During the adhesive preparation process, stirring and other processes introduce air, forming bubbles. Defoamers can reduce the surface tension of these bubbles, causing them to burst and disappear, thereby eliminating them from the adhesive. This helps improve the uniformity and stability of the adhesive, preventing defects such as reduced bond strength, voids, and impaired surface finishes after bonding gypsum-based substrates to finishing materials like PET.

[0065] Modified PUR resin: Specially modified PUR resin exhibits excellent compatibility with gypsum-based board substrates. It plays a key bonding role in the adhesive, quickly forming a high-strength bondline with excellent water resistance and durability. Its curing process is a chemical reaction that, through synergistic action with other ingredients, enables the adhesive to securely bond gypsum-based board substrates to PET and other finishing materials, providing strong adhesion to the entire adhesive system.

[0066] Catalyst (for PUR): A catalyst precisely controls the curing reaction speed of PUR resin. At the appropriate temperature, the catalyst accelerates the chemical reaction between the PUR resin and other components, enabling optimal curing within a predetermined timeframe. This shortens the adhesive's curing time, improves production efficiency, and ensures optimal bonding performance.

[0067] Vacuum Adhesive Emulsion: This adhesive has an optimized formula that rapidly forms a high-strength bond under vacuum conditions. During the preparation process, it is thoroughly mixed with other materials, imparting specialized properties to the adhesive for vacuum production. Its excellent flexibility allows it to adapt to gypsum-based board substrates of varying shapes and surface conditions, broadening its application range across various production equipment and processes, and enhancing bonding effectiveness under specific production conditions.

[0068] Water: Water primarily serves as a solvent in adhesive preparation, participating in some physical mixing processes. It helps evenly disperse other ingredients and adjusts the adhesive's consistency to an appropriate range, ensuring good fluidity and operability during preparation and use. Water also aids the dispersion and reaction of some ingredients, promoting the formation of the adhesive system and optimizing its performance.

[0069] Example 2

[0070] On the basis of Example 1, Figure 2 As shown, the preparation method of the adhesive for gypsum-based board materials according to any one of claims 1 to 4 is characterized in that the preparation method comprises the following steps:

[0071] Step S1: Add modified gypsum powder and silica fume into a mixing device and stir at a speed of 500-800 r / min for 10-15 minutes;

[0072] Step S2: adding redispersible latex powder, cellulose ether, plasticizer and defoamer to the mixed materials in step S1, and then stirring at a speed of 300-500 r / min for 15-20 minutes;

[0073] Step S3: Then, in another independent container, heat the modified PUR resin to 60-80° C., add the catalyst and stir evenly;

[0074] Step S4: adding the vacuum plastic latex to the mixed material obtained in step S2, and starting stirring at the same time, controlling the speed at 400-600 r / min, and continuing stirring for 10-15 minutes;

[0075] Step S5: Under continuous stirring, add the modified PUR resin mixture treated in step S3 to the system in step S4 for 10-15 minutes, then increase the speed to 700-900 rpm and continue stirring for 20-30 minutes;

[0076] Step S6: 5-10 minutes before the end of stirring, water is added to adjust the consistency of the adhesive to an appropriate range. After the stirring is completed, the adhesive is filtered through a filtering device to remove possible impurity particles therein, thereby obtaining a finished adhesive.

[0077] The working principle and beneficial effects of the above technical solution are:

[0078] The preparation method of the above-mentioned adhesive for gypsum-based boards is as follows: 20% modified PUR resin, 15% vacuum plastic latex, 30% modified gypsum powder, 8% redispersible latex powder, 3% cellulose ether, 8% silica fume, 2% plasticizer, 0.3% defoamer, 1% catalyst, and 12.7% water are accurately weighed according to the mass percentage. First, add modified gypsum powder and silica fume to the mixing equipment and stir at a constant speed of 600r / min for 12 minutes; then, add redispersible latex powder, cellulose ether, plasticizer and defoamer in turn, and continue stirring at a speed of 400r / min for 18 minutes; then in another container, heat the modified PUR resin to 70°C, add the catalyst, and stir evenly; slowly add the vacuum plastic latex to the above mixture, and stir at a speed of 500r / min for 12 minutes; under continuous stirring, slowly add the treated PUR resin mixture, and control the addition time to 12 minutes; then increase the speed to 800r / min and continue stirring for 25 minutes; then slowly add water 8 minutes before the end of stirring, stir evenly, and then finely filter the adhesive through professional filtration equipment to successfully obtain the finished adhesive.

[0079] At the same time, the performance tests of the adhesive for gypsum-based panels prepared by the preparation method are as follows:

[0080] Bond strength testing: Following strict adherence to relevant standards, the prepared adhesive was used to bond gypsum-based panels, and its bond strength was then precisely tested. The results showed a bond strength of 0.55-0.75 MPa, far exceeding that of conventional adhesives.

[0081] Water resistance testing: Bonded gypsum-based board specimens were placed in a humid environment for a specified period of time and then carefully observed for adhesion. The test results showed that even after three days in a humid environment, the specimens showed no signs of delamination, cracking, or shedding, demonstrating the adhesive's excellent water resistance.

[0082] Curing time test: Accurately record the time it takes for the adhesive to reach the specified strength from application. Tests show that the adhesive of our invention cures in just 15-20 minutes, significantly shorter than traditional adhesives.

[0083] It can be clearly seen from the above specific embodiments that the adhesive for gypsum-based board materials and the preparation method thereof of the present invention exhibit excellent performance and significant advantages, and can perfectly meet the strict performance requirements of the construction industry for gypsum-based board adhesives, especially in terms of bonding strength, water resistance, curing speed, and adaptability of production equipment and production processes.

[0084] The above-mentioned method for preparing the adhesive for gypsum-based panels has the following advantages:

[0085] 1. Excellent uniformity through ingredient mixing: The preparation method mixes the materials in stages, first mixing the modified gypsum powder with silica fume, and then adding the other ingredients in sequence. This approach ensures that each material is fully dispersed at an appropriate stirring speed and time, avoiding uneven mixing caused by mixing multiple materials at once. For example, in the examples, by precisely controlling the stirring parameters, the modified gypsum powder and silica fume are initially mixed for 10-15 minutes, laying the foundation for the subsequent uniform dispersion of the other ingredients, ultimately achieving uniform distribution of the adhesive components and stable and consistent performance.

[0086] 2. Precise Control of PUR Resin Reaction: The steps of heating the PUR resin separately and adding a catalyst allow for precise control of its curing reaction. By heating the PUR resin to a specific temperature (60-80°C) and stirring it at that temperature to fully dissolve the catalyst, this ensures that the PUR resin cures at an appropriate rate when subsequently mixed with other ingredients. This not only ensures that the adhesive's curing time meets construction requirements but also achieves optimal bond strength, improving product quality.

[0087] 3. Strong application adaptability: During the preparation process, the timing of adding the vacuum plastic emulsion and the stirring conditions are controlled to ensure that the adhesive has excellent vacuum adsorption performance and flexibility. In practical applications, whether in vacuum adsorption production scenarios or facing gypsum-based board substrates of different shapes and surface conditions, it can quickly form a high-strength bond, adapting to a variety of production equipment and production process environments, greatly broadening the adhesive's application range.

[0088] 4. High Production Efficiency: The entire preparation process is clearly defined, with each step timed appropriately. For example, when adding water to adjust the consistency, it is added at the appropriate time before the end of mixing. This ensures the adhesive's final consistency meets the required standards while preventing premature addition of water from affecting the mixing and reaction of other ingredients. The overall process is compact and efficient, reducing production time and energy consumption, and improving production efficiency.

[0089] 5. Stable Product Quality: The preparation method includes a filtration step. After the adhesive is prepared, it is filtered to remove any impurities. This process effectively ensures the purity of the finished adhesive, preventing impurities from affecting bonding performance. This ensures consistent and reliable product quality in each batch, meeting the stringent quality requirements of the veneer panel manufacturing industry.

[0090] Example 3

[0091] On the basis of Example 1 or 2, as Figure 3-Figure 4 As shown, the mixing equipment includes: a box body 1, a plurality of supporting legs 2 are fixedly installed on the circumferential side of the bottom of the box body 1, a support ring 3 is fixedly installed on the bottom of the box body 1, the bottom of the turntable 4 is slidably connected to the top of the support ring 3, a drive shaft 5 is fixedly installed on the bottom of the turntable 4, and the lower end of the drive shaft 5 rotates through the bottom of the box body 1 and is fixedly connected to a driven gear 6, a drive motor 7 is fixedly installed on the bottom of the box body 1, a drive gear 8 is fixedly installed on the output shaft of the drive motor 7, and the drive gear 8 is meshed with the driven gear 6, a shaking mechanism 9 is provided on the right side of the top of the turntable 4, a mixing drum 10 is fixedly installed on the top of the turntable 4 through a mounting bracket 11, a receiving tank 12 is fixedly installed on the left side of the top of the turntable 4, and a stirring mechanism 13 is provided on the left side of the top of the box body 1.

[0092] Preferably, the shaking mechanism 9 includes: an L-shaped bracket 14, the L-shaped bracket 14 is fixedly mounted on the right side of the top of the turntable 4, a mounting seat 15 is fixedly mounted on the top of the L-shaped bracket 14, a servo motor 16 is fixedly mounted on the mounting seat 15, and the output shaft of the servo motor 16 rotates through the front side wall of the mounting seat 15 and is fixedly connected to a crank 17, the lower end of the crank 17 is hinged with a connecting rod 18, an I-shaped bracket 19 is fixedly mounted on the left side of the top of the L-shaped bracket 14, and two slide rails 20 are symmetrically embedded in the I-shaped bracket. On both sides of 19, the first slider 21 and the second slider 22 are respectively slidably connected in the two slide rails 20, and the middle part of the transmission rod 23 is hinged on the side wall of the I-shaped bracket 19. The upper and lower sides of the transmission rod 23 are respectively provided with slide grooves 24. The first slider 21 and the second slider 22 are respectively slidably connected in the slide grooves 24 through the hinge rod 25. One end of the connecting rod 18 is hinged to the hinge rod 25 on the first slider 21, and the first slider 21 and the second slider 22 are hinged to the side wall of the mixing drum 10 through two connecting rods 26.

[0093] Preferably, the stirring mechanism 13 includes: a mounting plate 27, the mounting plate 27 is fixedly mounted on the left side of the top of the box body 1, the fixed end of the hydraulic telescopic rod 28 is fixedly mounted on the top of the mounting plate 27, one end of the electric guide rail 29 is fixedly mounted on the telescopic end of the hydraulic telescopic rod 28, the electric slider 30 is slidably connected to the electric guide rail 29, the fixed plate 31 is fixedly mounted on the side wall of the electric slider 30, the rotating shaft 32 is mounted on the front side wall of the fixed plate 31 through two mounting blocks 33, the rotating shaft 32 is rotatably connected to the mounting block 33, the driving motor 34 is fixedly mounted on the top of the fixed plate 31, the output shaft of the driving motor 34 is fixedly connected to the upper end of the rotating shaft 32, and the lower end of the rotating shaft 32 is fixedly mounted with a stirring rod 35.

[0094] The working principle and beneficial effects of the above technical solution are:

[0095] The above-mentioned stirring equipment can stir the components according to the stirring requirements in the preparation method of the adhesive for gypsum-based boards, and can also select different stirring methods for stirring, effectively improving the efficiency and quality of the preparation of the adhesive for gypsum-based boards. When the mixing equipment is in operation, the required raw materials are first added to the mixing drum 10, and then the driving motor 7 is started, and then the driving gear 8 fixedly connected to the driving output shaft rotates synchronously, and the driven gear 6 meshes with the driving gear 8 for transmission, so that the driving shaft 5 fixedly connected to the driven gear 6 rotates synchronously, and then the turntable 4 rotates along with the drive shaft 5, and then the mixing drum 10 fixedly mounted on the turntable 4 by the mounting bracket 11 rotates, so that the raw materials in the mixing drum 10 can be mixed. The above is the first stirring method; at the same time, the shaking assembly provided on the turntable 4 can also be started synchronously, and the servo motor 16 fixedly mounted on the mounting seat 15 is started, and then the crank 17 fixedly connected to the output shaft of the servo motor 16 is driven to rotate synchronously, and the crank 17 and connecting rod 18 are composed of a crank 17-connecting rod 18 mechanism. As the crank 17 rotates, the connecting rod 18 drives the first slider 21 along the I-shaped The slide rail 20 on the upper part of the bracket 19 slides left and right, and is then connected to the second slider 22 through the transmission rod 23 and the hinge rod 25, so that the second slider 22 also slides left and right along the slide rail 20 located at the lower part of the I-shaped bracket 19, and the hinge rod 25 located on the first slider 21 and the second slider 22 slides in the slide groove 24, so that the first slider 21 and the second slider 22 drive the two fixedly connected connecting rods 26 to move left and right respectively, and then the mixing drum 10 is shaken left and right along the mounting frame 11 under the drive of the two connecting rods 26, thereby achieving sufficient mixing of the raw materials in the mixing drum 10, which is the second stirring method; thus, the above two mixing methods can be selected according to the process steps required for preparing the adhesive, and the above two stirring methods can be carried out simultaneously or independently, which effectively guarantees the needs of the process required for adhesive preparation, making adhesive preparation more efficient and reliable.

[0096] Secondly, the stirring mechanism 13 can realize the third stirring mode of stirring the raw materials in the mixing drum 10. When the stirring mechanism 13 is working, the shaking mechanism 9 first makes the direction of the mixing drum 10 perpendicular to the turntable 4, and then the extension of the hydraulic telescopic rod 28 drives the electric guide rail 29 to move upward until the bottom of the stirring rod 35 completely exceeds the top of the mixing drum 10, and then the electric guide rail 29 works to make the electric slider 30 drive the fixed plate 31 to slide left and right along the electric guide rail 29, so that the stirring rod 35 is directly above the mixing drum 10, and then the hydraulic telescopic rod 28 drives the electric guide rail 29 to move downward until the stirring rod 35 completely enters the mixing drum 10, and then the drive motor 34 is started to drive the rotating shaft 32 to rotate, and then The stirring rod 35 is caused to rotate synchronously in the mixing drum 10, thereby achieving sufficient mixing of the raw materials; the third stirring method can be carried out synchronously with the first stirring method. After the stirring operation is completed, the electric guide rail 29 and the electric slider 30 cooperate with the hydraulic telescopic rod 28 to retract the stirring rod 35 into the storage groove 12, so as to avoid the raw materials carried by the stirring rod 35 from spilling and polluting the stirring equipment; secondly, when the second stirring method is working, the hydraulic telescopic rod 28 realizes the upward movement of the stirring rod 35 to avoid interference with the shaking mechanism 9. By setting the above three stirring methods, the appropriate stirring method can be independently selected according to the requirements of the preparation method of the adhesive for gypsum-based board materials, which greatly improves the quality of the prepared adhesive.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An adhesive for gypsum-based panels, characterized in that: The components of the adhesive for gypsum-based panels, expressed in percentage by weight, include: Modified PUR resin, content is 15%-30%; Vacuum plastic latex, accounting for 10%-20%; Modified gypsum powder, content is 20%-35%; Redispersible latex powder, accounting for 5%-10%; Cellulose ether, content is 2%-5%; Silica fume, accounting for 5%-10%; Plasticizer, content is 1%-3%; Defoaming agent, accounting for 0.1%-0.5%; The catalyst content for PUR is 0.5%-2%; Water, content is 10%-20%.

2. The adhesive for gypsum-based panels according to claim 1, characterized in that: The modified PUR resin needs to be heated to 60-80°C to ensure that the modification reaction proceeds smoothly.

3. The adhesive for gypsum-based panels according to claim 1, characterized in that: The vacuum plastic emulsion comprises components of polyurethane emulsion, acrylic emulsion and vinyl acetate-ethylene copolymer emulsion.

4. The adhesive for gypsum-based panels according to claim 3, characterized in that: The modified gypsum powder is obtained by changing the particle size and shape of the gypsum powder through mechanical crushing and grinding, and adding a chemical modifier such as stearic acid.

5. The method for preparing an adhesive for gypsum-based panels according to any one of claims 1 to 4, wherein: The preparation method comprises the following steps: Step S1: Add modified gypsum powder and silica fume into a mixing device and stir at a speed of 500-800 r / min for 10-15 minutes; Step S2: adding redispersible latex powder, cellulose ether, plasticizer and defoamer to the mixed materials in step S1, and then stirring at a speed of 300-500 r / min for 15-20 minutes; Step S3: Then, in another independent container, heat the modified PUR resin to 60-80° C., add the catalyst and stir evenly; Step S4: adding the vacuum plastic latex to the mixed material obtained in step S2, and starting stirring at the same time, controlling the speed at 400-600 r / min, and continuing stirring for 10-15 minutes; Step S5: Under continuous stirring, add the modified PUR resin mixture treated in step S3 to the system in step S4 for 10-15 minutes, then increase the speed to 700-900 rpm and continue stirring for 20-30 minutes; Step S6: 5-10 minutes before the end of stirring, water is added to adjust the consistency of the adhesive to an appropriate range. After the stirring is completed, the adhesive is filtered through a filtering device to remove possible impurity particles therein, thereby obtaining a finished adhesive.

6. The method for preparing an adhesive for gypsum-based panels according to claim 5, characterized in that: The stirring device comprises: a box (1), a plurality of supporting legs (2) are fixedly installed on the peripheral side of the bottom of the box (1), a supporting ring (3) is fixedly installed on the bottom of the box (1), the bottom of the turntable (4) is slidably connected to the top of the supporting ring (3), a driving shaft (5) is fixedly installed on the bottom of the turntable (4), and the lower end of the driving shaft (5) is fixedly connected to the driven gear (6) after rotating through the bottom of the box (1), a driving motor (7) is fixedly installed on the bottom of the box (1), a driving gear (8) is fixedly installed on the output shaft of the driving motor (7), and the driving gear (8) is meshed with the driven gear (6), a shaking mechanism (9) is provided on the right side of the top of the turntable (4), a mixing drum (10) is fixedly installed on the top of the turntable (4) through a mounting frame (11), a receiving tank (12) is fixedly installed on the left side of the top of the turntable (4), and a stirring mechanism (13) is provided on the left side of the top of the box (1).

7. The method for preparing an adhesive for gypsum-based panels according to claim 6, characterized in that: The shaking mechanism (9) comprises: an L-shaped bracket (14), the L-shaped bracket (14) is fixedly mounted on the right side of the top of the turntable (4), a mounting seat (15) is fixedly mounted on the top of the L-shaped bracket (14), a servo motor (16) is fixedly mounted on the mounting seat (15), and the output shaft of the servo motor (16) rotates through the front side wall of the mounting seat (15) and is fixedly connected to a crank (17), the lower end of the crank (17) is hinged with a connecting rod (18), an I-shaped bracket (19) is fixedly mounted on the left side of the top of the L-shaped bracket (14), and two slide rails (20) are symmetrically embedded in the I-shaped bracket (19) On both sides, the first slider (21) and the second slider (22) are respectively slidably connected in the two slide rails (20), the middle part of the transmission rod (23) is hinged on the side wall of the I-shaped bracket (19), and the upper and lower sides of the transmission rod (23) are respectively provided with a slide groove (24), the first slider (21) and the second slider (22) are respectively slidably connected in the slide groove (24) through a hinge rod (25), one end of the connecting rod (18) is hinged to the hinge rod (25) on the first slider (21), and the first slider (21) and the second slider (22) are hinged to the side wall of the mixing drum (10) through two connecting rods (26).

8. The method for preparing an adhesive for gypsum-based panels according to claim 6, wherein: The stirring mechanism (13) comprises: a mounting plate (27), wherein the mounting plate (27) is fixedly mounted on the left side of the top of the box body (1), a fixed end of a hydraulic telescopic rod (28) is fixedly mounted on the top of the mounting plate (27), one end of an electric guide rail (29) is fixedly mounted on the telescopic end of the hydraulic telescopic rod (28), an electric slider (30) is slidably connected to the electric guide rail (29), a fixed plate (31) is fixedly mounted on the side wall of the electric slider (30), a rotating shaft (32) is mounted on the front side wall of the fixed plate (31) through two mounting blocks (33), the rotating shaft (32) is rotatably connected to the mounting block (33), a driving motor (34) is fixedly mounted on the top of the fixed plate (31), an output shaft of the driving motor (34) is fixedly connected to the upper end of the rotating shaft (32), and a stirring rod (35) is fixedly mounted on the lower end of the rotating shaft (32).

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