Preparation method of flame-retardant UV light-cured acrylate pressure-sensitive adhesive

Abstract

The invention relates to the technical field of pressure-sensitive adhesive preparation, in particular to a flame-retardant UV photocuring acrylate pressure-sensitive adhesive preparation method which comprises the following steps: (1) uniformly mixing an acrylate monomer, a photoinitiator, a cross-linking agent and a flame retardant to form a prepolymer system; (2) carrying out free radical polymerization reaction on the prepolymer system at 50-80 DEG C for 2-4 hours to obtain viscous resin; (3) the viscous resin is subjected to dynamic impurity removal through a filtering device with a stirring assembly and ion exchange resin; and (4) carrying out UV curing on the filtered viscous resin under the curing conditions that the wavelength is 365 nm and the energy density is 800-1200 mJ / cm to form a pressure-sensitive adhesive main body. Through structural innovation and formula optimization, efficient impurity removal, stable storage and comprehensive performance improvement of the pressure-sensitive adhesive are realized, and the pressure-sensitive adhesive is suitable for industrial scenes with strict quality requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure - sensitive adhesive preparation, and particularly to a preparation method of a flame - retardant UV - curable acrylate pressure - sensitive adhesive. Background Art

[0002] At present, UV - curable acrylate pressure - sensitive adhesives are widely used in fields such as electronics and packaging due to their characteristics of rapid curing and environmental protection. However, the traditional preparation methods have the following problems: Low filtration efficiency: Ionic impurities (such as metal ions) in the pressure - sensitive adhesive are difficult to completely remove through static filtration, affecting the product transparency and corrosion resistance; Easy blockage of filtration pores: The filtration medium (such as resin particles) is easy to accumulate at the bottom of the filtration device, resulting in a decrease in filtration efficiency; Poor storage stability: The pressure - sensitive adhesive is prone to sedimentation and stratification due to gravity during storage, and requires frequent manual stirring, increasing costs; Difficulty in balancing flame - retardant performance and adhesive performance: The addition of traditional flame - retardants often leads to a decrease in properties such as the peel strength and initial tack of the pressure - sensitive adhesive. Summary of the Invention

[0003] In order to overcome the shortcomings in the prior art, the present invention provides a preparation method of a flame - retardant UV - curable acrylate pressure - sensitive adhesive.

[0004] To achieve the above - mentioned purpose, the present invention provides the following technical solution: A preparation method of a flame - retardant UV - curable acrylate pressure - sensitive adhesive, comprising the following steps: (1) Mix acrylate monomers, photoinitiators, cross - linkers, and flame - retardants evenly to form a prepolymer system; (2) Carry out a free - radical polymerization reaction on the prepolymer system at 50 - 80 °C for 2 - 4 hours to obtain a viscous resin; (3) Dynamically remove impurities from the viscous resin through a filtration device with a stirring component and ion - exchange resin; (4) Carry out UV curing on the filtered viscous resin, and the curing conditions are a wavelength of 365 nm and an energy density of 800 - 1200 mJ / cm² to form the main body of the pressure - sensitive adhesive.

[0005] Preferably, the filtration device includes a chassis. The preparation method of the flame - retardant UV - curable acrylate pressure - sensitive adhesive further includes an anti - precipitation mechanism, a storage tank, a first valve, a second valve, and a filtration mechanism. The anti - precipitation mechanism is fixedly connected to the upper surface of the chassis; the storage tank is fixedly connected to the upper surface of the anti - precipitation mechanism; the first valve and the second valve are respectively installed at the upper and lower ends of the storage tank; the filtration mechanism is installed at the top of the first valve.

[0006] Preferably, the anti-settling mechanism includes a support plate, a slide bar, a slide seat, a cross plate, a first motor, a driving gear, a rotating shaft, a driven gear, a turntable, a guide groove and a shifting rod. There are two support plates, which are respectively fixedly connected to the left and right ends of the upper surface of the chassis. There are two slide bars, which are respectively horizontally installed at the front and rear ends inside the support plates. The slide seat is sleeved on the outer wall of the slide bar and can slide left and right. The upper surface of the slide seat is fixedly connected to the lower surface of the storage tank. The cross plate is horizontally installed in the middle of the left side wall of the support plate on the right side. The first motor is installed at the right end of the lower surface of the cross plate. The driving gear is installed at the output end of the first motor. The rotating shaft is installed on the upper surface of the cross plate at the left end through a bearing and can rotate around its own axis. The driven gear and the turntable are installed on the outer wall of the rotating shaft from bottom to top, and the driven gear is meshed with the driving gear. Driven by the first motor, the turntable rotates through the transmission of the driving gear and the driven gear. The guide groove is opened on the upper surface of the turntable. One end of the shifting rod is installed on the lower surface of the slide seat, and the other end is inserted into the inner cavity of the guide groove.

[0007] Preferably, a heater is provided inside the storage tank, and the bottom of the inner cavity is an inclined surface.

[0008] Preferably, the transmission ratio of the driving gear to the driven gear is greater than 1.

[0009] Preferably, the guide groove is in a diamond shape, and the bending position is chamfered.

[0010] Preferably, the filtering mechanism includes an outer cylinder, a positioning groove, a feeding hopper, a top plate, a clamping block, a second motor, a stirring assembly, a scraping plate, a connecting rod, a filtering cylinder and ion exchange resin. The outer cylinder is installed at the top of the first valve. A plurality of positioning grooves are equidistantly arranged along the circumference on the upper surface of the outer cylinder. The feeding hopper is obliquely installed at the top of the outer wall of the outer cylinder, and the pressure-sensitive adhesive is put into the inner cavity of the outer cylinder through the feeding hopper. The top plate is placed on the top of the outer cylinder. There are a plurality of clamping blocks, which are equidistantly installed on the side wall of the top plate along the circumference, and the clamping blocks are inserted into the inner cavity of the positioning groove to position the top plate. The second motor is installed at the center position of the top of the top plate. The stirring assembly is vertically installed at the output end of the second motor. There are two scraping plates, which are installed at the bottom end of the stirring assembly with a difference of 180 degrees. There are at least three connecting rods, which are equidistantly arranged along the circumference on the outer edge of the lower surface of the top plate. The filtering cylinder is installed at the bottom end of the connecting rod. Filtering holes are uniformly opened on the lower surface of the filtering cylinder. The ion exchange resin is placed in the inner cavity of the filtering cylinder.

[0011] Preferably, the upper surface of the scraping plate is an inclined surface.

[0012] Preferably, the filtering cylinder is located at the bottom of the feeding hopper.

[0013] Preferably, the inner diameter of the filtering holes on the filtering cylinder is smaller than the diameter of the ion exchange resin.

[0014] Preferably, the stirring assembly includes: a stirring rod, a first gear, a screw rod, and a second gear; the stirring rod penetrates through the outer wall of the top plate and is fixedly connected to the output end of the second motor; the first gear is fixedly sleeved on the outer wall of the stirring rod; the number of screw rods is at least one, and they are fixedly installed on the lower surface of the top plate; a through hole is formed in the center of the second gear, and internal threads are provided on the inner wall of the through hole. The second gear is sleeved on the outer wall of the screw rod, and the internal threads of the second gear are matched with the external threads of the screw rod. The second gear meshes with the first gear.

[0015] Compared with the prior art, the present invention has the following beneficial effects: Through structural innovation and formulation optimization, the present invention realizes efficient impurity removal, stable storage, and comprehensive performance improvement of the pressure-sensitive adhesive, and is applicable to industrial scenarios with strict quality requirements. The present invention has the following effects: 1. Efficient filtration and impurity removal: By arranging ion exchange resin and a stirring device in the filtration mechanism, the pressure-sensitive adhesive is fully stirred by the stirring assembly before entering the storage tank and comes into full contact with the ion exchange resin, which can effectively adsorb ionic impurities such as ionic impurities in the pressure-sensitive adhesive, improve the purity and quality of the pressure-sensitive adhesive, and ensure the effect of subsequent use.

[0016] 2. Preventing clogging of filtration holes: The scraper in the filtration mechanism is designed with an inclined upper surface structure. When the stirring assembly rotates, the scraper can push the ion exchange resin located at the bottom of the filter cylinder upward, preventing the ion exchange resin from accumulating for a long time and clogging the filtration holes, ensuring the smooth falling of the pressure-sensitive adhesive, and improving the filtration efficiency.

[0017] 3. Anti-precipitation design: The anti-precipitation mechanism uses the first motor to drive the storage tank to swing left and right reciprocally, and combines the heater inside the storage tank to heat the pressure-sensitive adhesive, improving the fluidity of the pressure-sensitive adhesive, thereby preventing the pressure-sensitive adhesive from precipitating and stratifying during long-term storage, and ensuring the uniformity and stability of the pressure-sensitive adhesive.

[0018] In summary, the present device is applicable to the filtration and storage of various liquid pressure-sensitive adhesives, especially suitable for occasions with high quality requirements for pressure-sensitive adhesives. Through a clever structural design, the present invention realizes the efficient filtration and anti-precipitation storage of liquid pressure-sensitive adhesives, solves problems such as precipitation, difficulty in removing ionic impurities, and easy clogging of filtration holes existing in traditional pressure-sensitive adhesive filtration devices, and improves the use quality and storage stability of the pressure-sensitive adhesive. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the present invention.

[0020] Figure 2 is Figure 1 the front view sectional view of

[0021] Figure 3 is Figure 2 the enlarged view at A in

[0022] Figure 4 This is the top view of the turntable of the present invention.

[0023] Figure 5 This is the exploded view of the filtering mechanism of the present invention.

[0024] Figure 6 This is the front sectional view of the filtering mechanism of the present invention.

[0025] Figure 7 It is Figure 5 The enlarged view at position B in

[0026] Figure 8 This is the structural schematic diagram of the stirring assembly of the present invention.

[0027] In the figure: 1, chassis; 2, anti-sedimentation mechanism; 3, storage tank; 4, first valve; 5, second valve; 6, filtering mechanism; 21, support plate; 22, sliding rod; 23, sliding seat; 24, cross plate; 25, first motor; 26, driving gear; 27, rotating shaft; 28, driven gear; 29, turntable; 210, guide groove; 211, lever; 61, outer cylinder; 62, positioning groove; 63, feeding hopper; 64, top plate; 65, clamping block; 66, second motor; 67, stirring assembly; 68, scraping plate; 69, connecting rod; 610, filtering cylinder; 611, ion exchange resin; 671, stirring rod; 672, first gear; 673, screw rod; 674, second gear. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] The present invention provides a technical solution: a preparation method of a flame-retardant UV-curable acrylate pressure-sensitive adhesive, comprising the following steps: (1) Mix acrylate monomers, photoinitiators, crosslinking agents and flame retardants evenly to form a prepolymer system; (2) Carry out a free radical polymerization reaction on the prepolymer system at 50 - 80 °C for 2 - 4 hours to obtain a viscous resin; (3) Dynamically remove impurities from the viscous resin through a filtering device with a stirring assembly and ion exchange resin; (4) Carry out UV curing on the filtered viscous resin under the curing conditions of a wavelength of 365 nm and an energy density of 800 - 1200 mJ / cm² to form the main body of the pressure-sensitive adhesive.

[0030] The weight parts of the acrylate monomer, photoinitiator, crosslinking agent, and flame retardant are as follows: Acrylate monomer: 60 - 80 parts (preferably 65 - 75 parts), selected from one or more combinations of butyl acrylate, isooctyl acrylate, and methyl methacrylate; Photoinitiator: 1 - 5 parts (preferably 2 - 3 parts), selected from one or more of 2 - hydroxy - 2 - methylpropiophenone (1173), 1 - hydroxycyclohexyl phenyl ketone (184), and 2,4,6 - trimethylbenzoyl diphenylphosphine oxide (TPO); Crosslinking agent: 0.5 - 3 parts (preferably 1 - 2 parts), selected from one or more of trimethylolpropane triacrylate (TMPTA), pentaerythritol tetraacrylate (PETIA), and dipropylene glycol diacrylate (TPGDA); Flame retardant: 5 - 20 parts (preferably 8 - 15 parts), selected from one or more of triphenyl phosphate (TPP), melamine cyanurate (MCA), and ammonium polyphosphate (APP).

[0031] By compounding phosphate esters with nitrogen - phosphorus - based flame retardants (such as the combination of TPP and APP), a flame - retardant performance with LOI≥28% can be achieved within the range of 8 - 15 parts, while maintaining the transparency and peel strength of the pressure - sensitive adhesive; selecting the compounding of 1173 and TPO (in a ratio of 2:1), rapid curing (≤5 seconds) can be achieved at an energy density of 800 - 1200 mJ / cm² with a dosage of 2 - 3 parts, avoiding yellowing; using a 1:1 mixture of TMPTA and TPGDA can balance the initial tack (≥15# steel ball) and holding tack (≥72 hours) of the pressure - sensitive adhesive within the range of 1 - 2 parts.

[0032] Verification by examples: Example 1: 70 parts of butyl acrylate + 1173 (2 parts) + TMPTA (1 part) + APP (10 parts) → Peel strength 12 N / cm, LOI = 29%.

[0033] Example 2: 65 parts of isooctyl acrylate + TPO (1.5 parts) + PETIA (1.5 parts) + MCA (8 parts) → Initial tack 18# steel ball, holding tack 85 hours.

[0034] Such as Figures 1-8As shown in the figure, the filtering device includes a chassis 1. A sediment prevention mechanism 2 is fixedly connected to the upper surface of the chassis 1. A storage tank 3 is fixedly connected to the upper surface of the sediment prevention mechanism 2. The storage tank 3 is used for storing pressure-sensitive adhesive. A heater is arranged inside the storage tank 3. The heater heats the pressure-sensitive adhesive to improve the fluidity of the pressure-sensitive adhesive. A first valve 4 and a second valve 5 are respectively installed at the upper and lower ends of the storage tank 3. The bottom of the inner cavity of the storage tank 3 is inclined. When the second valve 5 is opened, it is ensured that the pressure-sensitive adhesive in the storage tank 3 can flow out completely along the inclined surface. A filtering mechanism 6 is installed at the top of the first valve 4.

[0035] As a preferred solution, further, the sediment prevention mechanism 2 includes two support plates 21 respectively fixedly connected to the left and right sides of the upper surface of the chassis 1. Horizontal sliding rods 22 are installed on the front and rear sides of the inner top of the support plates 21. A sliding seat 23 that can slide left and right is sleeved on the outer wall of the sliding rods 22. The upper surface of the sliding seat 23 is fixedly connected to the lower surface of the storage tank 3. A cross plate 24 is horizontally installed in the middle of the left side wall of the support plate 21 on the right side. A first motor 25 is installed on the lower surface of the right side of the cross plate 24. The output end of the first motor 25 is installed with a driving gear 26. The upper surface of the left side of the cross plate 24 is installed with a rotating shaft 27 that can rotate around its own axis through a bearing. A turntable 29 and a driven gear 28 are respectively installed at the upper and lower ends of the rotating shaft 27. The driving gear 26 is meshed with the driven gear 28, and the transmission ratio is greater than 1. When the driving gear 26 and the driven gear 28 are in transmission, the turntable 29 belongs to deceleration, making it more labor-saving when the first motor 25 drives the driving gear 26 to rotate. A diamond-shaped guide groove 210 is opened on the upper surface of the turntable 29. A dial rod 211 inserted into the inner cavity of the guide groove 210 is installed on the lower surface of the sliding seat 23. When the turntable 29 drives the guide groove 210 to rotate, the dial rod 211 slides in the guide groove 210. Restricted by the movement direction of the sliding seat 23 by the sliding rod 22, the guide groove 210 can pull the sliding seat 23 to swing left and right reciprocally, shaking and mixing the pressure-sensitive adhesive in the storage tank 3 to prevent the pressure-sensitive adhesive from precipitating.

[0036] As a preferred solution, further, the filtering mechanism 6 includes an outer cylinder 61 installed on the top of the first valve 4. A plurality of positioning grooves 62 are equidistantly arranged along the circumferential direction on the upper surface of the outer cylinder 61. A downward hopper 63 inclinedly arranged is installed at the top end of the side wall of the outer cylinder 61. The pressure-sensitive adhesive is put in by means of the downward hopper 63. A top plate 64 is placed on the top of the outer cylinder 61. A plurality of clamping blocks 65 are equidistantly installed along the circumferential direction on the side wall of the top plate 64, and the clamping blocks 65 are inserted into the inner cavity of the positioning grooves 62 to position the top plate 64. A second motor 66 is installed at the center position of the upper surface of the top plate 64. A stirring assembly 67 is installed at the output end of the second motor 66. Two oppositely-positioned scraping plates 68 are installed at the bottom of the stirring assembly 67, and the upper surface of the scraping plate 68 is an inclined surface. At least three connecting rods 69 are equidistantly installed along the circumferential direction on the outer edge of the lower surface of the top plate 64. A filtering cylinder 610 inserted into the inner cavity of the outer cylinder 61 is installed at the bottom end of the connecting rod 69. The position of the filtering cylinder 610 is lower than that of the downward hopper 63 to ensure that the pressure-sensitive adhesive can flow into the filtering cylinder 610. A plurality of filtering holes are evenly opened on the lower surface of the filtering cylinder 610. An ion exchange resin 611 is stored in the inner cavity of the filtering cylinder 610. The stirring assembly 67 stirs the ion exchange resin 611 and the pressure-sensitive adhesive, so that the ion exchange resin 611 adsorbs the ionic impurities in the pressure-sensitive adhesive, playing a filtering role on the pressure-sensitive adhesive. Since the upper surface of the scraping plate 68 is an inclined surface, the ion exchange resin 611 at the bottom of the filtering cylinder 610 can be lifted when the scraping plate 68 rotates, preventing the filtering holes from being blocked and affecting the dropping of the pressure-sensitive adhesive. The inner diameter of the filtering hole is smaller than the outer diameter of the ion exchange resin 611 to prevent the ion exchange resin 611 from falling off.

[0037] As a preferred solution, furthermore, the stirring assembly 67 includes: a stirring rod 671, a first gear 672, a screw 673, and a second gear 674; the stirring rod 671 passes through the outer wall of the top plate 64 and is fixedly connected to the output end of the second motor 66; the first gear 672 is fixedly sleeved on the outer wall of the stirring rod 671; the number of screws 673 is two, and the two screws 673 are symmetrically and fixedly installed on the lower surface of the top plate 64 around the stirring rod 671; a through hole is formed in the center of the second gear 674, and internal threads are provided on the inner wall of the through hole. The second gear 674 is sleeved on the outer wall of the screw 673, and the internal threads of the second gear 674 are matched with the external threads of the screw 673. The second gear 674 meshes with the first gear 672. The second motor 66 can drive the first gear 672 to rotate through the stirring rod 671. At the same time, the first gear 672 meshes with the second gear 674, prompting the second gear 674 to rotate. Since the internal threads of the second gear 674 are matched with the external threads of the screw 673, the second gear 674 is prompted to move on the screw 673, thereby enabling the ion exchange resin 611 to come into more sufficient contact with the pressure-sensitive adhesive. The blades on the second gear 674 can be adjusted in size as needed, thereby increasing or decreasing the contact area between the second gear 674 and the ion exchange resin 611 and the pressure-sensitive adhesive. Through the combined movement of the second gear 674 moving and rotating, the ion exchange resin 611 and the pressure-sensitive adhesive can be mixed in multiple dimensions. The stirring assembly 67 can fully agitate the materials in the horizontal direction (driven by the rotation of the first gear 672) and the vertical direction (driven by the up and down movement of the second gear 674), thereby achieving a more comprehensive and sufficient mixing.

[0038] Working principle: Step 1: Open the first valve 4 to allow the pressure-sensitive adhesive to enter the filter cylinder 610 from the feeding hopper 63. The second motor 66 drives the stirring assembly 67 to rotate, enabling the ion exchange resin 611 to come into sufficient contact with the pressure-sensitive adhesive. The ion exchange resin 611 adsorbs the ionic impurities in the pressure-sensitive adhesive to remove impurities from the pressure-sensitive adhesive. The inclined surface of the scraper 68 moves the ion exchange resin 611 at the bottom of the filter cylinder 610 upward to prevent the filter holes from being blocked by the ion exchange resin 611 and affecting the fall of the pressure-sensitive adhesive. Step 2: The second motor 66 drives the first gear 672 to rotate through the stirring rod 671. Since the first gear 672 meshes with the second gears 674, the second gears 674 on both sides of the first gear 672 rotate on the screw rod 673. Since the internal threads of the second gears 674 match the external threads of the screw rod 673, the second gears 674 move on the screw rod 673. By the forward and reverse rotation of the second motor 66, the second gears 674 rotate while moving up and down reciprocally, enabling the second gears 674 on both sides to mix the ion exchange resin 611 and the pressure-sensitive adhesive simultaneously. At the same time, the ion exchange resin 611 can move around the first gear 672, achieving a full-range stirring of the ion exchange resin 611 and the pressure-sensitive adhesive. Step 3: After the pressure-sensitive adhesive is purified, it is stored in the storage tank 3. The first valve 4 is closed for the preservation of the pressure-sensitive adhesive. The second motor 66 is lifted, and the filter cartridge 610 is taken out of the outer cylinder 61 for the treatment of the ion exchange resin 611 for reuse. Step 4: During the long-term storage of the pressure-sensitive adhesive, the first motor 25 drives the driving gear 26 to rotate. Under the transmission of the driving gear 26 and the driven gear 28, the turntable 29 rotates. The dial rod 211 slides in the guide groove 210. Restricted by the slide rod 22 on the dial rod 211, the curved surface of the guide groove 210 squeezes the dial rod 211 to make the slide seat 23 move left and right reciprocally, causing the storage tank 3 to shake left and right. At the same time, the heater of the storage tank 3 heats the pressure-sensitive adhesive to improve its fluidity, achieving a stirring effect on the pressure-sensitive adhesive and preventing the pressure-sensitive adhesive from precipitating and stratifying.

[0039] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a flame retardant UV light-curing acrylate pressure-sensitive adhesive, comprising the following steps: (1) Evenly mixing acrylate monomer, photoinitiator, crosslinking agent and flame retardant to form a prepolymer system; (2) subjecting the prepolymer system to a free radical polymerization reaction at 50-80° C. for 2-4 hours to obtain a viscous resin; (3) Dynamically removing impurities from the viscous resin by passing it through a filtration device with a stirring component and an ion exchange resin; (4) The filtered viscous resin is UV cured under the curing conditions of a wavelength of 365nm and an energy density of 800-1200mJ / cm² to form a pressure-sensitive adhesive body.

2. The method for preparing a flame retardant UV light-curing acrylate pressure-sensitive adhesive according to claim 2, characterized in that: The filtering device comprises: including a chassis (1); An anti-sedimentation mechanism (2) fixedly connected to the upper surface of the chassis (1); A storage tank (3) fixedly connected to the upper surface of the anti-sedimentation mechanism (2); A first valve (4) and a second valve (5) are respectively installed at the upper and lower ends of the storage tank (3); The filtering mechanism (6) is installed on the top of the first valve (4).

3. The method for preparing a flame retardant UV light-curing acrylate pressure-sensitive adhesive according to claim 2, characterized in that: The anti-sedimentation mechanism (2) comprises: Two support plates (21) are fixedly connected to the left and right ends of the upper surface of the chassis (1) respectively; Two slide bars (22) are transversely mounted on the front and rear ends of the inner side of the support plate (21); A sliding seat (23) is sleeved on the outer wall of the sliding rod (22) so as to be slidable left and right, and the upper surface of the sliding seat (23) is fixedly connected to the lower surface of the storage tank (3); A transverse plate (24) is transversely mounted on the middle portion of the left side wall of the support plate (21) located on the right side; A first motor (25) mounted on the right end of the lower surface of the horizontal plate (24); A driving gear (26) mounted on the output end of the first motor (25); A rotating shaft (27) is mounted on the left end of the upper surface of the horizontal plate (24) via a bearing so as to be rotatable about its own axis; A driven gear (28) and a rotating disk (29) are mounted on the outer wall of the rotating shaft (27) from bottom to top, and the driven gear (28) is meshedly connected with the driving gear (26). When driven by the first motor (25), the rotating disk (29) is rotated through the driving gear (26) and the driven gear (28); A guide groove (210) is provided on the upper surface of the rotating disk (29); A shifting rod (211) has one end mounted on the lower surface of the sliding seat (23) and the other end inserted into the inner cavity of the guide groove (210).

4. The method for preparing a flame retardant UV light-curing acrylate pressure-sensitive adhesive according to claim 3, characterized in that: A heater is arranged inside the storage tank (3), and the bottom of the inner cavity is an inclined surface.

5. The method for preparing a flame retardant UV light-curing acrylate pressure-sensitive adhesive according to claim 4, characterized in that: The guide groove (210) is in a rhombus shape, and the bending position is chamfered.

6. The method for preparing a flame retardant UV light-curing acrylate pressure-sensitive adhesive according to claim 5, characterized in that: The filtering mechanism (6) comprises: An outer cylinder (61) is mounted on the top of the first valve (4), and a plurality of positioning grooves (62) are formed on the upper surface of the outer cylinder (61) at equal intervals along the circumferential direction; A lower hopper (63) is obliquely mounted on the top of the outer wall of the outer cylinder (61), and the pressure-sensitive adhesive is fed into the inner cavity of the outer cylinder (61) through the lower hopper (63); A top plate (64) is placed on the top of the outer cylinder (61); A plurality of clamping blocks (65) are installed on the side wall of the top plate (64) at equal intervals along the circumferential direction, and the clamping blocks (65) are inserted into the inner cavity of the positioning groove (62) to position the top plate (64); A second motor (66) is mounted at the top center of the top plate (64); A stirring assembly (67) vertically mounted at the output end of the second motor (66); Two scrapers (68) are installed at the bottom of the stirring assembly (67) at a distance of 180 degrees from each other; At least three connecting rods (69) are installed at equal intervals along the circumferential direction on the outer edge of the lower surface of the top plate (64); A filter cartridge (610) is mounted on the bottom end of the connecting rod (69), and filter holes are evenly formed on the lower surface of the filter cartridge (610); The ion exchange resin (611) is placed in the inner cavity of the filter cartridge (610).

7. The method for preparing a flame retardant UV light-curing acrylate pressure-sensitive adhesive according to claim 6, characterized in that: The upper surface of the scraper (68) is an inclined surface.

8. The method for preparing a flame retardant UV light-curing acrylate pressure-sensitive adhesive according to claim 7, characterized in that: The filter cartridge (610) is located at the bottom of the lower hopper (63).

9. The method for preparing a flame retardant UV light-curing acrylate pressure-sensitive adhesive according to claim 8, characterized in that: The inner diameter of the filter holes on the filter cartridge (610) is smaller than the diameter of the ion exchange resin (611).

10. The method for preparing a flame retardant UV light-curing acrylate pressure-sensitive adhesive according to claim 9, characterized in that: The stirring assembly (67) comprises: A stirring rod (671) passing through the outer wall of the top plate (64) and fixedly connected to an output end of the second motor (66); A first gear (672) fixedly sleeved on the outer wall of the stirring rod (671); At least one screw rod (673) is fixedly mounted on the lower surface of the top plate (64); A second gear (674), wherein a through hole is provided at the center of the second gear (674), and an internal thread is provided on the inner wall of the through hole; the second gear (674) is sleeved on the outer wall of the screw rod (673), and the internal thread of the second gear (674) matches the external thread of the screw rod (673); the second gear (674) is meshed with the first gear (672).

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