High-strength flexible composite furniture adhesive and preparation method thereof

Abstract

The invention provides a high-strength flexible composite furniture adhesive and a preparation method thereof, belongs to the technical field of adhesives, and solves the technical problems that air is easily mixed in the stirring process of an existing stirring device, so that bubbles are doped in materials, and the stirring effect is influenced. The high-strength flexible composite furniture adhesive is prepared from a mixed solution and inorganic powder, and the mixed solution is prepared from, by mass, 15 parts of a blender, 40 parts of vinyl acetate-ethylene copolymer emulsion, 10 parts of a water-based isocyanate cross-linking agent, 20 parts of dioctyl adipate, 10 parts of silica sol and 5 parts of citric acid. The inorganic powder comprises the following components in parts by mass: 3 parts of light calcined magnesia, 3 parts of analytically pure magnesium oxide and 3 parts of calcium silicate. The stirring and mixing device has the advantages that bubbles in the composite adhesive are subjected to defoaming treatment in the stirring and mixing process, and the structural filling degree of the composite adhesive is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of adhesives and relates to a furniture adhesive, in particular to a high-strength flexible composite furniture adhesive and a preparation method thereof. Background Art

[0002] At present, adhesives are commonly used substances in people's daily life and production, especially in the board manufacturing industry, furniture manufacturing industry, construction and other industries, all of which require adhesives, and the amount used is quite large.

[0003] A search revealed a Chinese patent document that discloses a composite water-based adhesive for flooring [Application Number: 202311240722.X; Publication Number: CN 117210168 A]. The raw materials for preparing the composite water-based adhesive for flooring, in parts by weight, include: 3-5 parts emulsifier, 28-43 parts acrylic monomer, 15-25 parts reactive monomer, 0.01-0.05 parts chain transfer agent, 0.3-0.5 parts initiator, 0.03-0.08 parts antioxidant, 0.03-0.08 parts defoamer, 0.05-0.15 parts wetting agent, 0.1-0.3 parts buffer, 40-45 parts deionized water, and an acid-base modifier. The present invention utilizes a scientifically formulated emulsifier combination to improve the dispersibility of the prepared emulsion in aqueous solvents, enhance the stability of the water-based adhesive, and avoid stratification during storage. In addition, the reaction monomer adopts a combination of vinyl acetate and vinyl versatate, which improves the water resistance and moisture resistance of the water-based adhesive. The introduction of modified hydroxyethyl acrylate urea can be applied to bonding with a variety of substrates.

[0004] Although this patent improves the water resistance and moisture resistance of water-based adhesives and introduces modified hydroxyethyl acrylate urea, it can be used for bonding with a variety of substrates. However, the composite adhesive of this invention requires a stirring device. The existing stirring device easily mixes air during the stirring process, causing bubbles to be mixed into the material. This phenomenon is more likely to occur when processing viscous liquids or solid-liquid mixtures, affecting the stirring effect. Summary of the Invention

[0005] The purpose of the present invention is to address the above-mentioned problems in the existing technology and propose a high-strength flexible composite furniture adhesive and a preparation method thereof. The technical problem to be solved by the invention is: how to achieve defoaming treatment of bubbles inside the composite adhesive during the stirring and mixing process to improve the structural fullness of the composite adhesive.

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

[0007] A high-strength flexible composite furniture adhesive, characterized in that the composite adhesive comprises a mixed solution and an inorganic powder, wherein the mixed solution comprises, by mass, 15 to 20 parts of a tonic agent, 40 to 60 parts of vinyl acetate-ethylene copolymer emulsion, 10 to 12 parts of an aqueous isocyanate crosslinking agent, 20 to 23 parts of dioctyl adipate, 10 to 15 parts of silica sol, and 5 to 8 parts of citric acid, and the inorganic powder comprises, by mass, 3 to 6 parts of light-burned magnesium oxide, 3 to 6 parts of analytically pure magnesium oxide, and 3 to 5 parts of calcium silicate.

[0008] The film-forming temperature of the vinyl acetate-ethylene copolymer emulsion is 0 to 10° C., the average particle size of the particles in the vinyl acetate-ethylene copolymer emulsion is 0.30 μm to 0.7 μm, the solid content of the vinyl acetate-ethylene copolymer emulsion is 54% to 57%, the pH value of the vinyl acetate-ethylene copolymer emulsion is 7 to 9, the solid content of the aqueous isocyanate crosslinking agent is 20% to 25%, and the pH value of the aqueous isocyanate crosslinking agent is 9.5 to 10.5.

[0009] S1. Dioctyl adipate and vinyl acetate-ethylene copolymer emulsion are mixed in a mass ratio of 10:(0.1-0.5), and ultrasonically dispersed for 20 min to 35 min; a conditioning agent, an aqueous isocyanate crosslinking agent, silica sol, and citric acid are added in a mass ratio of 1:(1-2):(0.1-1):(0.006-0.02) to obtain a mixed solution;

[0010] S2. The mixed solution is stirred at a speed of 90 to 180 r / min at 40° for 30 to 45 min. After the stirring is completed, light-burned magnesium oxide and analytically pure magnesium oxide in a weight ratio of (0.5 to 5): (0.5 to 5) are mixed and dispersed, and the obtained mixed powder is added to the mixed solution after the stirring is completed, and the mixture is stirred again at a speed of 120 to 230 r / min at 40° for 20 to 30 min. Citric acid in a weight ratio of (0.006 to 0.02) is added during the stirring process.

[0011] S3. Add defoamer and wetting agent in a weight ratio of (0.5-1): (0.2-1) to the mixed adhesive mixture at room temperature, mix for 10-15 minutes, and then let it stand for 40-60 minutes. After the adhesive mixture is defoamed and wetted, it can be discharged to obtain a high-strength flexible composite furniture adhesive.

[0012] The stirring equipment used in steps S2 and S3 is an adhesive preparation equipment, comprising a stirring box and a stirring chamber provided in the stirring box, a pair of stirring rods being rotatably connected in the stirring chamber, and a pair of defoaming cylinders being fixed in the stirring chamber, and a pressure groove being provided on the left and right sides of the stirring box, a pressure rod 1 being slidably connected in the two pressure grooves, and a receiving groove being provided at the bottom end of the two pressure rods 1, the groove bottoms of the two pressure grooves being rotatably connected to a driving seat, each driving seat being coaxially fixedly connected to a driving block, a plurality of mutually parallel inclined slide grooves being provided on the driving block, a vertical vertical slide groove being provided between each adjacent inclined slide groove, each receiving groove being sleeved with a corresponding driving block, and a connecting block being fixed in each receiving groove, each connecting block being slidably matched with the corresponding inclined slide groove and vertical slide groove, a return spring being fixed between each pressure rod 1 and the groove bottom of the corresponding pressure groove, a transmission assembly being connected between each driving seat and the corresponding stirring rod, and a knocking defoaming assembly being provided in each defoaming cylinder.

[0013] When the lever is pressed down, the connecting block slides in cooperation with the corresponding inclined slot, thereby driving the driving block to rotate. When the connecting block slides to the bottom of the inclined slot, the lever is lifted by the return spring. During the lifting process, the connecting block slides in cooperation with the vertical slot, and moves the connecting block to the top of the other inclined slot. As a result, the lever is pressed down reciprocatingly to realize continuous rotation of the driving block. After the drive rotates continuously, the corresponding stirring rod is driven to rotate through the transmission assembly. After the stirring rod rotates, the composite adhesive is stirred and mixed. In the process of the lever pressing down reciprocatingly, the operation of the knocking defoaming assembly is also driven, and the bubbles inside the composite adhesive are defoamed during the stirring and mixing process, thereby improving the structural fullness of the composite adhesive.

[0014] The transmission assembly includes a pair of drive gears 1 rotatably connected to the mixing box, and a pair of drive gears 2 rotatably connected to the mixing box. The two drive gears 1 are coaxially fixedly connected to the corresponding drive seats, and the two drive gears 2 are coaxially fixedly connected to the corresponding stirring rods. A transmission toothed belt is connected between the two drive gears 1 and the corresponding drive gears 2.

[0015] With the above structure, the driving seat can be rotated to drive the driving gear 1 to rotate. When the driving gear 1 rotates, it will drive the driving gear 2 to rotate through the transmission belt. When the driving gear 2 rotates, it will drive the stirring rod to rotate, thereby realizing the transmission capacity.

[0016] The defoaming assembly includes a control rod rotatably connected in each defoaming cylinder and a pair of collision blocks fixedly connected in each defoaming cylinder. Each control rod is provided with a plurality of spring grooves, each spring groove is slidably connected with a guide slider, and a return spring is fixedly connected between each guide slider and the bottom of the corresponding spring groove, and one end of each guide slider is knocked into the corresponding collision block.

[0017] With the above structure, the rotating rod can be controlled to rotate, and multiple guide sliders can be driven to move during the rotation of the rotating rod. During the movement of the multiple guide sliders, they will collide with the collision block, causing the defoaming cylinder to vibrate. The vibration can help the bubbles move and gather in the liquid, and eventually disappear from the surface of the liquid, thereby achieving a defoaming effect.

[0018] A pair of suction chutes are provided on the left and right sides of the mixing box, a piston is slidably connected in each suction chute, the top of each piston is fixedly connected to a pressure rod 2, the top of each pressure rod 2 is fixedly connected to the corresponding pressure rod 1, a plurality of suction holes are provided in the mixing box, and a plurality of active chambers are provided in the mixing box, each active chamber is rotatably connected to a driving wind wheel, each driving wind wheel is coaxially fixedly connected to one end of the corresponding control rotating rod, one end of each suction hole is connected to the corresponding active chamber, the other end of each suction hole is connected to the corresponding suction chute, and a plurality of ventilation holes connected to the corresponding active chambers are provided on the surface of the mixing box.

[0019] By adopting the above structure, the pressure rod 2 can be fixedly connected with the pressure rod 1, so that when the pressure rod is pressed down, the pressure rod 2 will be pressed down synchronously. During the downward pressing process of the pressure rod 2, the piston will be driven to move, so that the piston is pressed down to discharge the air in the suction chute. During the discharge process, the air in the suction chute drives the wind wheel to rotate, and after the wind wheel rotates, it drives the control rod to rotate, thereby realizing the ability of vibration defoaming.

[0020] A cross bar is fixed between the top ends of the two pressure rods, a driving box is fixed on the top of the mixing box, a driving assembly is arranged in the driving box, and the driving assembly is connected to the cross bar.

[0021] With the above structure, the cross bar can be pulled by the driving component. After the cross bar is pulled, the two pressure rods can be pulled down synchronously to achieve stirring and defoaming.

[0022] The driving assembly includes a transmission bevel gear 1 that is rotatably connected in the driving box and a transmission bevel gear 2 that is rotatably connected in the driving box. The transmission rotating bevel gear 1 is meshed with the transmission bevel gear 2, and a connecting sleeve is coaxially fixedly connected to the transmission bevel gear 2, a reciprocating screw is threadedly connected to the connecting sleeve, and one end of the reciprocating screw passes through the axis of the transmission bevel gear 2 and is fixedly connected to the cross bar, and a transmission gear 1 is provided outside the driving box, a driving motor is fixed on the driving box, and the output shaft of the driving motor is coaxially fixedly connected to the transmission gear 2, the transmission gear 1 is coaxially fixedly connected to the transmission bevel gear 1, and the transmission gear 1 is meshed with the transmission gear 2.

[0023] By adopting the above structure, the driving motor can be used to drive the transmission gear 2 to rotate, and the transmission gear 2 drives the transmission gear 1 to rotate. When the transmission gear 1 rotates, it will drive the transmission bevel gear 1 to rotate. When the transmission bevel gear 1 rotates, it will drive the transmission bevel gear 2 to rotate. When the transmission bevel gear 2 rotates, it will drive the connecting sleeve to rotate. When the connecting sleeve rotates, it will drive the reciprocating screw to move back and forth up and down. The reciprocating screw further drives the cross bar to move synchronously. The cross bar further drives the pressure rod 1 and the pressure rod 2 to move back and forth up and down, thereby realizing stirring work and defoaming capabilities.

[0024] Compared with the existing technology, this pharmaceutical feed corrosion-resistant reactor has the following advantages:

[0025] 1. The introduction of vinyl acetate-ethylene copolymer emulsion and dioctyl adipate improves the density of the formed polymer film, and the presence of hydrophobic groups on the surface of the formed polymer film has a certain barrier ability to external environmental water, thereby improving the water resistance of the adhesive after film formation. The prepared composite adhesive has excellent water resistance and still has good bonding properties after being soaked in water for a long time.

[0026] 2. By pressing down the pressure rod, the connecting block slides with the corresponding inclined slide groove to drive the driving block to rotate. When the connecting block slides to the bottom end of the inclined slide groove, the pressure rod is lifted by the reset spring. During the lifting process, the connecting block is moved to the top of the other inclined slide groove through the sliding cooperation with the vertical slide groove, so that the pressure rod is pressed down reciprocatingly to realize the continuous rotation of the driving block. After the drive rotates continuously, the corresponding stirring rod will be driven to rotate through the transmission assembly. After the stirring rod rotates, the composite adhesive will be stirred and mixed.

[0027] 3. When the pressure rod is pressed back and forth, it will also drive the operation of the knocking defoaming component, and defoam the bubbles inside the composite adhesive during the stirring and mixing process, thereby improving the structural fullness of the composite adhesive. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1It is the bonding strength test table of the present invention.

[0029] Figure 2 It is a corrosion resistance test table in the present invention.

[0030] Figure 3 It is a structural schematic diagram of the present invention.

[0031] Figure 4 It is a structural diagram of the transmission structure in the present invention.

[0032] Figure 5 It is a schematic structural diagram of the interior of the stirring chamber in the present invention.

[0033] Figure 6 It is a schematic structural diagram of the interior of the mixing box in the present invention.

[0034] Figure 7 It is a schematic structural diagram of the interior of the defoaming cylinder in the present invention.

[0035] Figure 8 It is a schematic structural diagram of the interior of the drive box in the present invention.

[0036] Figure 9 This is a process flow chart of the high-strength flexible composite furniture adhesive of the present invention.

[0037] 1. Stirring box; 2. Stirring chamber; 3. Stirring rod; 4. Defoaming cylinder; 5. Pressure groove; 6. Pressure rod 1; 7. Storage groove; 8. Drive seat; 9. Drive block; 10. Inclined slide groove; 11. Vertical slide groove; 12. Connecting block; 13. Return spring; 14. Drive gear 1; 15. Drive gear 2; 16. Transmission toothed belt; 17. Control lever; 18. Collision block; 19. Spring groove; 20. Guide slider; 21. Push spring; 22. Suction slide groove; 23. Piston; 24. Pressure rod 2; 25. Suction hole; 26. Active chamber; 27. Drive impeller; 28. Ventilation hole; 29. Cross bar; 30. Drive box; 31. Transmission bevel gear 1; 32. Transmission bevel gear 2; 33. Connecting sleeve; 34. Reciprocating screw; 35. Transmission gear 1; 36. Drive motor; 37. Transmission gear 2. DETAILED DESCRIPTION

[0038] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0039] Example 1

[0040] A high-strength flexible composite furniture adhesive comprises a mixed solution and inorganic powder, wherein the mixed solution comprises, by mass, 15 parts of a coagulant, 40 parts of vinyl acetate-ethylene copolymer emulsion, 10 parts of an aqueous isocyanate crosslinker, 20 parts of dioctyl adipate, 10 parts of silica sol, and 5 parts of citric acid, and the inorganic powder comprises, by mass, 3 parts of light-burned magnesium oxide, 3 parts of analytically pure magnesium oxide, and 3 parts of calcium silicate.

[0041] The film-forming temperature of the vinyl acetate-ethylene copolymer emulsion is 5° C., the average particle size of the particles in the vinyl acetate-ethylene copolymer emulsion is 0.30 μm, the solid content of the vinyl acetate-ethylene copolymer emulsion is 54%, the pH value of the vinyl acetate-ethylene copolymer emulsion is 7, the solid content of the aqueous isocyanate crosslinking agent is 20%, and the pH value of the aqueous isocyanate crosslinking agent is 9.5.

[0042] S1. Dioctyl adipate and vinyl acetate-ethylene copolymer emulsion are mixed in a mass ratio of 10:0.1, and ultrasonically dispersed for 20 minutes; a conditioning agent, an aqueous isocyanate crosslinking agent, silica sol, and citric acid are added in a mass ratio of 1:1:1:0.02 and mixed to obtain a mixed solution;

[0043] S2. The mixed solution was stirred at a speed of 90 r / min at 40° for 30 min. After the stirring was completed, light-burned magnesium oxide and analytically pure magnesium oxide with a weight ratio of 0.5:5 were mixed and dispersed, and the obtained mixed powder was added to the mixed solution after the stirring was completed, and stirred again at a speed of 120 r / min at 40° for 20 min. During the stirring process, citric acid with a weight ratio of 0.006 was added.

[0044] S3. Add defoamer and wetting agent in a weight ratio of 1:0.2 to the mixed adhesive mixture at room temperature, mix for 15 minutes, and then let it stand for 60 minutes. After the adhesive mixture is defoamed and wetted, it can be discharged to obtain high-strength flexible composite furniture adhesive.

[0045] The stirring device used in steps S2 and S3 is an adhesive preparation device, including a stirring box 1, a stirring chamber 2 opened in the stirring box 1, a pair of stirring rods 3 are rotatably connected in the stirring chamber 2, and a pair of defoaming cylinders 4 are fixed in the stirring chamber 2, and a pressing groove 5 is opened on the left and right sides of the stirring box 1, and a pressing rod 6 is slidably connected in the two pressing grooves 5, and a receiving groove 7 is opened at the bottom of the two pressing rods 6, and the bottom of the two pressing grooves 5 is rotatably connected to a driving seat 8, and each driving seat 8 is coaxially fixedly connected to a driving block 9, and the driving block 9 is opened. There are multiple parallel inclined slides 10, and a vertical slide 11 is opened between each adjacent inclined slide 10. Each storage groove 7 is connected to the corresponding drive block 9, and a connecting block 12 is fixed in each storage groove 7. Each connecting block 12 slides with the corresponding inclined slide 10 and vertical slide 11. A return spring 13 is fixed between each pressure rod 6 and the bottom of the corresponding pressure groove 5. A transmission assembly is connected between each drive seat 8 and the corresponding stirring rod 3, and a knocking defoaming assembly is provided in each defoaming cylinder 4.

[0046] By adopting the above structure, the pressure rod 6 can be pressed down, and the connecting block 12 can slide with the corresponding inclined slot 10 to drive the driving block 9 to rotate. When the connecting block 12 slides to the bottom end of the inclined slot 10, the pressure rod 6 is lifted by the return spring 13. During the lifting process, the connecting block 12 is moved to the top of the other inclined slot 10 by sliding with the vertical slot 11, so that the pressure rod 6 presses down reciprocatingly to realize the continuous rotation of the driving block 9. After the continuous rotation, the corresponding stirring rod 3 will be driven to rotate through the transmission component. After the stirring rod 3 rotates, the composite adhesive will be stirred and mixed. In the process of the reciprocating downward pressure of the pressure rod 6, the operation of the knocking defoaming component will also be driven. During the stirring and mixing process, the bubbles inside the composite adhesive are defoamed, thereby improving the structural fullness of the composite adhesive.

[0047] The transmission assembly includes a pair of drive gears 14 rotatably connected to the mixing box 1, and a pair of drive gears 2 15 rotatably connected to the mixing box 1. The two drive gears 14 are coaxially fixedly connected to the corresponding drive seats 8, and the two drive gears 2 15 are coaxially fixedly connected to the corresponding stirring rods 3. A transmission toothed belt 16 is connected between the two drive gears 14 and the corresponding drive gears 2 15.

[0048] With the above structure, the driving seat 8 can be rotated to drive the driving gear 14 to rotate. After the driving gear 14 rotates, it will drive the driving gear 2 15 to rotate through the transmission belt 16. After the driving gear 2 15 rotates, it will drive the stirring rod 3 to rotate, thereby realizing the transmission capability.

[0049] The defoaming assembly includes a control rod 17 rotatably connected in each defoaming cylinder 4, and a pair of collision blocks 18 fixedly connected in each defoaming cylinder 4. Each control rod 17 is provided with a plurality of spring grooves 19, and each spring groove 19 is slidably connected with a guide slider 20, and a return spring 13 is fixedly connected between each guide slider 20 and the bottom of the corresponding spring groove 19, and one end of each guide slider 20 is knocked into the corresponding collision block 18.

[0050] By adopting the above structure, the rotating rod 17 can be controlled to rotate, and the multiple guide sliders 20 can be driven to move during the rotation of the rotating rod 17. During the movement of the multiple guide sliders 20, they will collide with the collision block 18, causing the defoaming cylinder 4 to vibrate. The vibration can help the bubbles move and gather in the liquid, and eventually disappear from the surface of the liquid, thereby achieving a defoaming effect.

[0051] A pair of suction chutes 22 are provided on the left and right sides of the mixing box 1, and a piston 23 is slidably connected in each suction chute 22. The top of each piston 23 is fixedly connected to a pressure rod 24, and the top of each pressure rod 24 is fixedly connected to the corresponding pressure rod 1 6. A plurality of suction holes 25 are provided in the mixing box 1, and a plurality of active chambers 26 are provided in the mixing box 1. A driving wind wheel 27 is rotatably connected in each active chamber 26, and each driving wind wheel 27 is coaxially fixedly connected to one end of the corresponding control rotating rod 17. One end of each suction hole 25 is connected to the corresponding active chamber 26, and the other end of each suction hole 25 is connected to the corresponding suction chute 22, and a plurality of ventilation holes 28 connected to the corresponding active chamber 26 are provided on the surface of the mixing box 1.

[0052] By adopting the above structure, the pressure rod 2 24 can be fixedly connected with the pressure rod 1 6, so that when the pressure rod 1 6 is pressed down, the pressure rod 2 24 will be pressed down synchronously. During the pressing process of the pressure rod 24, the piston 23 will be driven to move, so that the piston 23 is pressed down to discharge the air in the suction chute 22. During the discharge process, the air in the suction chute 22 blows and drives the wind wheel 27 to rotate. After driving the wind wheel 27 to rotate, it will drive the control rotating rod 17 to rotate, thereby realizing the ability of vibration defoaming.

[0053] A cross bar 29 is fixed between the top ends of the two pressure rods 6, and a driving box 30 is fixed on the top of the mixing box 1. A driving assembly is provided in the driving box 30, and the driving assembly is connected to the cross bar 29.

[0054] With the above structure, the cross bar 29 can be pulled by the driving assembly. After the cross bar 29 is pulled, the two pressure rods 6 can be pulled down synchronously to achieve stirring and defoaming.

[0055] The driving assembly includes a transmission bevel gear 1 31 rotatably connected in the driving box 30 and a transmission bevel gear 2 32 rotatably connected in the driving box 30. The transmission rotating bevel gear 1 is meshed with the transmission bevel gear 2 32, and a connecting sleeve 33 is coaxially fixedly connected to the transmission bevel gear 2 32. A reciprocating screw 34 is threadedly connected to the connecting sleeve 33, and one end of the reciprocating screw 34 passes through the axis of the transmission bevel gear 2 32 and is fixedly connected to the cross bar 29. A transmission gear 1 35 is provided outside the driving box 30, and a driving motor 36 is fixed on the driving box 30. The output shaft of the driving motor 36 is coaxially fixedly connected to the transmission gear 2 37. The transmission gear 1 35 is coaxially fixedly connected to the transmission bevel gear 1 31, and the transmission gear 1 35 is meshed with the transmission gear 2 37.

[0056] By adopting the above structure, the driving motor 36 can be used to drive the transmission gear 2 37 to rotate, and the transmission gear 2 37 can drive the transmission gear 1 35 to rotate. After the transmission gear 1 35 rotates, it will drive the transmission bevel gear 1 31 to rotate. The rotation of the transmission bevel gear 1 31 will drive the transmission bevel gear 2 32 to rotate. After the transmission bevel gear 2 32 rotates, it will drive the connecting sleeve 33 to rotate. After the connecting sleeve 33 rotates, it will drive the reciprocating screw 34 to move back and forth up and down. The reciprocating screw 34 further drives the cross bar 29 to move synchronously. The cross bar 29 further drives the pressure rod 1 6 and the pressure rod 2 24 to move back and forth up and down, thereby realizing stirring work and defoaming capabilities.

[0057] Example 2

[0058] The technical feature that distinguishes Example 2 of the present invention from Example 1 is that the weight portion of the aqueous isocyanate cross-linking agent is 15 parts.

[0059] Example 3

[0060] The technical feature that distinguishes Example 3 of the present invention from Example 1 is that the weight portion of the vinyl acetate-ethylene copolymer emulsion is 62 parts.

[0061] Comparative Example 1

[0062] The technical feature that distinguishes Comparative Example 1 from Example 1 is that the weight portion of the silica sol is 20 parts.

[0063] Example 4

[0064] The technical feature that distinguishes Example 4 of the present invention from Example 1 is that the weight portion of light-burned magnesium oxide is 7 parts.

[0065] Example 5

[0066] The technical feature that distinguishes Example 5 of the present invention from Example 1 is that the weight portion of calcium silicate is 6 parts.

[0067] Comparative Example 2

[0068] The technical feature that distinguishes Comparative Example 2 from Example 1 is that the weight portion of calcium silicate is 0 parts.

[0069] Example 6

[0070] The technical feature that distinguishes Example 6 of the present invention from Example 1 is that the weight portion of analytically pure magnesium oxide is 2 parts.

[0071] Example 7

[0072] The technical feature that distinguishes Example 7 of the present invention from Example 1 is that the weight portion of analytically pure magnesium oxide is 7 parts.

[0073] Comparative Example 3

[0074] The technical feature that distinguishes Comparative Example 3 from Example 1 is that the weight portion of analytically pure magnesium oxide is 0 parts.

[0075] Example 8

[0076] The technical feature that distinguishes Example 8 of the present invention from Example 1 is that the weight portion of dioctyl adipate is 25 parts.

[0077] Example 9

[0078] The technical feature that distinguishes Example 9 of the present invention from Example 1 is that the weight portion of dioctyl adipate is 15 parts.

[0079] Comparative Example 4

[0080] The technical feature that distinguishes Comparative Example 4 from Example 1 is that the weight portion of the aqueous isocyanate cross-linking agent is 0 parts.

[0081] Example 10

[0082] The technical feature that distinguishes Example 10 of the present invention from Example 1 is that the equipment used in the preparation are all processing equipment that can be purchased on the existing market.

[0083] Test Example 1:

[0084] Adhesion strength test: Stretch along the normal direction of the adhesion surface, record the maximum tensile force at separation, and calculate the adhesion strength based on the adhesion area. Two 8cm x 8cm wooden blocks were glued together for testing. The samples were then fixed to a specimen holder and stretched along the normal direction of the adhesion surface. The maximum tensile force at separation was recorded, and the adhesion strength was calculated based on the adhesion area. The results are shown in Table 1.

[0085] Megapascal (MPa) Megapascal (MPa) Example 1 62.2 Example 6 63.1 Example 2 61.5 Example 7 61.8 Example 3 63.3 Comparative Example 3 62.1 Comparative Example 1 63.4 Example 8 62.5 Example 4 62.4 Example 9 61.9 Example 5 61.7 Comparative Example 4 60.2 Comparative Example 2 61.0 Example 10 61.2

[0086] A comparison of the experimental data from Examples 1-10 and Comparative Examples 1-4 in Table 1 reveals that the composite furniture adhesives prepared according to the present invention exhibit excellent bonding strength. The peel strength of Examples 1-10 is greater than that of Comparative Example 4, demonstrating that the water-based isocyanate crosslinker reacts with the other materials to form a crosslinked structure, significantly improving the physical and chemical properties of the materials and enhancing the adhesive's bonding performance.

[0087] Test Example 2:

[0088] Corrosion resistance testing: Neutral salt spray tests were conducted in a salt spray chamber at 36°C ± 4°C. After 48 hours, the samples were removed and weighed, and the corrosion rate was calculated. The results are shown in Table 2.

[0089]

[0090] A comparison of the experimental data from Examples 1-10 and Comparative Examples 1-4 in Table 2 reveals that the composite furniture adhesive produced by the present invention exhibits excellent corrosion resistance. The comparison of the corrosion rates of Examples 1-10 and Comparative Example 3 demonstrates the chemical stability of analytically pure magnesium oxide. It forms a protective film within the adhesive, effectively preventing further corrosion and neutralizing acidic substances to reduce corrosion.

[0091] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A high-strength flexible composite furniture adhesive, characterized in that: The composite adhesive includes a mixed solution and inorganic powder. The mixed solution includes, by mass, 15 to 20 parts of a conditioning agent, 40 to 60 parts of vinyl acetate-ethylene copolymer emulsion, 10 to 12 parts of an aqueous isocyanate crosslinking agent, 20 to 23 parts of dioctyl adipate, 10 to 15 parts of silica sol, and 5 to 8 parts of citric acid. The inorganic powder includes, by mass, 3 to 6 parts of light-burned magnesium oxide, 3 to 6 parts of analytically pure magnesium oxide, and 3 to 5 parts of calcium silicate.

2. A high-strength flexible composite furniture adhesive according to claim 1, characterized in that: The film-forming temperature of the vinyl acetate-ethylene copolymer emulsion is 0 to 10° C., the average particle size of the particles in the vinyl acetate-ethylene copolymer emulsion is 0.30 μm to 0.7 μm, the solid content of the vinyl acetate-ethylene copolymer emulsion is 54% to 57%, the pH value of the vinyl acetate-ethylene copolymer emulsion is 7 to 9, the solid content of the aqueous isocyanate crosslinking agent is 20% to 25%, and the pH value of the aqueous isocyanate crosslinking agent is 9.5 to 10.

5.

3. The method for preparing a high-strength flexible composite furniture adhesive according to claim 1, wherein: The method comprises the following preparation steps: S1. Dioctyl adipate and vinyl acetate-ethylene copolymer emulsion are mixed in a mass ratio of 10:(0.1-0.5), and ultrasonically dispersed for 20 min to 35 min; a conditioning agent, an aqueous isocyanate crosslinking agent, silica sol, and citric acid are added in a mass ratio of 1:(1-2):(0.1-1):(0.006-0.02) to obtain a mixed solution; S2. The mixed solution is stirred at a speed of 90 to 180 r / min at 40° for 30 to 45 min. After the stirring is completed, light-burned magnesium oxide and analytically pure magnesium oxide in a weight ratio of (0.5 to 5): (0.5 to 5) are mixed and dispersed, and the obtained mixed powder is added to the mixed solution after the stirring is completed, and the mixture is stirred again at a speed of 120 to 230 r / min at 40° for 20 to 30 min. Citric acid in a weight ratio of (0.006 to 0.02) is added during the stirring process. S3. Add defoamer and wetting agent in a weight ratio of (0.5-1): (0.2-1) to the mixed adhesive mixture at room temperature, mix for 10-15 minutes, and then let it stand for 40-60 minutes. After the adhesive mixture is defoamed and wetted, it can be discharged to obtain a high-strength flexible composite furniture adhesive.

4. A high-strength flexible composite furniture adhesive and a preparation method thereof according to claim 3, characterized in that: The stirring device used in steps S2 and S3 is an adhesive preparation device, comprising a stirring box (1), a stirring chamber (2) provided in the stirring box (1), a pair of stirring rods (3) being rotatably connected in the stirring chamber (2), and a pair of defoaming cylinders (4) being fixed in the stirring chamber (2), and a pressing groove (5) being provided on both the left and right sides of the stirring box (1), a pressing rod (6) being slidably connected in the two pressing grooves (5), and a receiving groove (7) being provided at the bottom ends of the two pressing rods (6), the bottoms of the two pressing grooves (5) being rotatably connected to a driving seat (8), and a driving block (9) being coaxially fixedly connected to each driving seat (8), and the driving block ( 9), a plurality of mutually parallel inclined chutes (10) are provided on the receiving groove (7), a vertical chutes (11) are provided between each adjacent inclined chutes (10), each receiving groove (7) is sleeved with the corresponding driving block (9), and a connecting block (12) is fixed in each receiving groove (7), each connecting block (12) is slidably matched with the corresponding inclined chutes (10) and vertical chutes (11), a return spring (13) is fixed between each pressure rod (6) and the bottom of the corresponding pressure groove (5), a transmission component is connected between each driving seat (8) and the corresponding stirring rod (3), and a knocking defoaming component is provided in each defoaming cylinder (4).

5. A high-strength flexible composite furniture adhesive and a preparation method thereof according to claim 4, characterized in that: The transmission assembly comprises a pair of drive gears 1 (14) rotatably connected to the mixing box (1), and a pair of drive gears 2 (15) rotatably connected to the mixing box (1). The two drive gears 1 (14) are coaxially fixedly connected to the corresponding drive seats (8), and the two drive gears 2 (15) are coaxially fixedly connected to the corresponding stirring rods (3). A transmission toothed belt (16) is connected between the two drive gears 1 (14) and the corresponding drive gears 2 (15).

6. A high-strength flexible composite furniture adhesive and a preparation method thereof according to claim 4, characterized in that: The defoaming assembly comprises a control rod (17) rotatably connected in each defoaming cylinder (4), and a pair of collision blocks (18) fixedly connected in each defoaming cylinder (4). Each control rod (17) is provided with a plurality of spring slots (19). A guide slider (20) is slidably connected in each spring slot (19). A push spring (21) is fixedly connected between each guide slider (20) and the bottom of the corresponding spring slot (19). One end of each guide slider (20) is knocked into the corresponding collision block (18).

7. A high-strength flexible composite furniture adhesive and a preparation method thereof according to claim 6, characterized in that: The mixing box (1) is provided with a pair of suction chutes (22) on both sides, each suction chute (22) is slidably connected with a piston (23), the top of each piston (23) is fixedly connected with a pressure rod 2 (24), and the top of each pressure rod 2 (24) is fixedly connected with the corresponding pressure rod 1 (6). A plurality of suction holes (25) are provided in the mixing box (1), and a plurality of active chambers (26) are provided in the mixing box (1). Each active chamber (26) is rotatably connected with a driving wind wheel (27), and each driving wind wheel (27) is coaxially fixedly connected to one end of the corresponding control rotating rod (17). One end of each suction hole (25) is connected to the corresponding active chamber (26), and the other end of each suction hole (25) is connected to the corresponding suction chute (22), and a plurality of ventilation holes (28) connected to the corresponding active chamber (26) are provided on the surface of the mixing box (1).

8. The high-strength flexible composite furniture adhesive and preparation method thereof according to claim 4, characterized in that: A cross bar (29) is fixed between the top ends of the two pressure rods (6), a driving box (30) is fixed on the top of the mixing box (1), a driving assembly is arranged in the driving box (30), and the driving assembly is connected to the cross bar (29).

9. A high-strength flexible composite furniture adhesive and a preparation method thereof according to claim 8, characterized in that: The driving assembly comprises a transmission bevel gear 1 (31) rotatably connected in a driving box (30) and a transmission bevel gear 2 (32) rotatably connected in a driving box (30), wherein the transmission rotating bevel gear 1 is meshed with the transmission bevel gear 2 (32), and a connecting sleeve (33) is coaxially fixedly connected to the transmission bevel gear 2 (32), a reciprocating screw (34) is threadedly connected to the connecting sleeve (33), and one end of the reciprocating screw (34) passes through the axis of the transmission bevel gear 2 (32) and is fixedly connected to the cross bar (29), and a transmission gear 1 (35) is provided outside the driving box (30), a driving motor (36) is fixed on the driving box (30), and the output shaft of the driving motor (36) is coaxially fixedly connected with the transmission gear 2 (37), the transmission gear 1 (35) is coaxially fixedly connected to the transmission bevel gear 1 (31), and the transmission gear 1 (35) is meshed with the transmission gear 2 (37).

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