CN114456667A

CN114456667A - Preparation method of water-based acrylic resin

Info

Publication number: CN114456667A
Application number: CN202111626187.2A
Authority: CN
Inventors: 尼尔森
Original assignee: Taichang Resin Foshan Co ltd
Current assignee: Taichang Resin Foshan Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-05-10
Anticipated expiration: 2041-12-29
Also published as: CN114456667B

Abstract

The invention discloses a preparation method of water-based acrylic resin, which comprises the following steps: acrylic resin prepolymer, polyisocyanate compound, photoinitiator, ultraviolet absorbent, defoaming agent, emulsifier, dispersant, tackifying resin, high molecular adhesive and water; preparing a priming phase; preparing a dropwise addition phase; and (4) polymerizing. In the invention, a polyisocyanate compound, a photoinitiator and an ultraviolet absorbent are introduced into an acrylic resin prepolymer, the water-based acrylic resin has light curing property and moisture curing property through optimized formula design and unique process control, the ultraviolet absorption efficiency is improved through the action of the ultraviolet absorbent, and the coating can keep higher curing speed and curing efficiency by matching with ultraviolet irradiation in an environment with higher humidity.

Description

Preparation method of water-based acrylic resin

Technical Field

The invention relates to the technical field of coating materials, in particular to a preparation method of water-based acrylic resin.

Background

The acrylic resin is a resin copolymerized from acrylic acid, methacrylate and other vinyl monomers. The acrylate monomers have various varieties, the polymerization method and the process can be selected from various varieties, the performance of the acrylate monomers can be adjusted in a large range, and the acrylate monomers can be blended or chemically modified with various resins to meet different application occasions. The acrylate monomer has carbon-carbon unsaturated double bonds, generates acrylate resin through polymerization, has high light, heat and chemical stability, and has the advantages of high transparency, light color, brightness, fullness, excellent color retention, good film forming property, tough coating, excellent weather resistance, corrosion resistance, chemical resistance, stain resistance, high adhesive force and the like, and has the characteristics of rich raw material sources and relatively low cost. Therefore, the coating prepared from the polyacrylate resin has the advantages of good pollution resistance, acid resistance, alkali resistance, water resistance, good film-forming property, safe use, good construction performance and the like, and is widely applied to the fields of buildings, automobile surfaces, adhesives and the like.

The existing water-based acrylic resin coating usually uses water as a solvent, and because the water content is large and the evaporation latent heat is high, the time for drying a paint film at normal temperature needs to be increased, aiming at the problem, the patent of the existing patent No. 202011019414.0 'an ultraviolet light curing acrylic resin water-based coating and a preparation method thereof' discloses that an ultraviolet light curing agent is directly grafted into a hyperbranched polymer structure and can be cross-linked and cured in molecules to form a three-dimensional network structure, and the curing efficiency is high; and the curing reaction starts to be crosslinked and cured only under the ultraviolet irradiation, so that the performance of the final cured film is easy to control, and the construction difficulty of the coating is obviously reduced. In the above patent, the curing efficiency of the paint is improved by ultraviolet light, but in an environment with high humidity, the curing of the paint is affected by moisture in the air, and the problem of low efficiency still exists.

Disclosure of Invention

The invention aims to: in order to solve the problems, a preparation method of the water-based acrylic resin is provided.

In order to achieve the purpose, the invention adopts the following technical scheme:

a preparation method of a water-based acrylic resin comprises the following steps:

s1, weighing a sample, and comprising the following components in parts by weight: 30-50 parts of acrylic resin prepolymer, 20-30 parts of polyisocyanate compound, 10-15 parts of photoinitiator, 5-8 parts of ultraviolet absorbent, 2-6 parts of defoaming agent, 1-3 parts of emulsifier, 1-2 parts of dispersant, 5-10 parts of tackifying resin, 3-5 parts of high molecular adhesive and 80 parts of water, wherein the acrylic resin prepolymer is formed by polymerizing methyl methacrylate monomer, styrene and 2-ethyl methacrylate monomer, the polyisocyanate compound is one or a mixture of more of toluene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate and lysine diisocyanate, the photoinitiator is diaryl iodonium salt, the ultraviolet absorbent is phenyl o-hydroxybenzoate, phenyl ester, methyl methacrylate, styrene, methyl methacrylate, styrene, ethylene glycol, styrene, hexamethylene diisocyanate, styrene, one of dihydroxy benzophenone, 2-hydroxy-4-methoxy benzophenone and 2-hydroxy-4-n-octoxy benzophenone;

s2, preparing a priming phase, namely adding the acrylic resin prepolymer, the defoaming agent, the emulsifier, the tackifying resin and the high molecular adhesive into 50-60 parts of water, and stirring and mixing at the speed of 500-600rpm by using a preparation device;

s3, preparing a dropping phase, adding the polyisocyanate compound, the photoinitiator and the ultraviolet absorbent into the rest water, and stirring and mixing at the speed of 500-600rpm by using a preparation device;

s4, polymerizing, heating the priming phase to keep the temperature at 80-90 ℃, stirring the priming phase at the speed of 100-;

the preparation device adopted by the preparation method comprises a rack, wherein a cross beam and a PLC (programmable logic controller) are arranged on the rack, an emulsification kettle is arranged at the bottom of the cross beam, a feeding hole is formed in the upper end of the side surface of the emulsification kettle, a discharging hole and a discharging valve are arranged at the bottom of the side surface of the emulsification kettle, a driven shaft is arranged at the center of the inside of the emulsification kettle, a plurality of stirring mechanisms which are distributed at equal intervals along the axial direction are arranged on the outer side of the driven shaft, a driving mechanism for driving the driven shaft to rotate is arranged on the rack, each stirring mechanism is composed of at least two rotating assemblies which are uniformly distributed around the driven shaft in an annular mode, and a material scraping part is arranged at the upper end of the inside of the emulsification kettle; the rotating assembly comprises a fixed shaft, the fixed shaft is fixedly connected with the driven shaft, a first ring body is arranged on the outer side of one end, close to the driven shaft, of the fixed shaft, a movable sleeve is sleeved on the outer side of the fixed shaft, a stirring blade is arranged at one end, far away from the driven shaft, of the movable sleeve, a second ring body is arranged on the outer side of the other end of the movable sleeve, magnetic rings are arranged on the end faces, close to each other, of the first ring body and the second ring body, a spiral first guide groove is formed in the surface of the fixed shaft, and a protrusion matched with the first guide groove is formed in the inner side of the movable sleeve; the driving mechanism comprises a first driving piece and a rotary disc, a driving shaft is arranged at the output end of the first driving piece, a driving gear is arranged on the outer side of the driving shaft, a pushing assembly for driving the driving gear to reciprocate along the axial direction of the driving shaft is arranged between the driving shaft and the driving gear, a plurality of first teeth and a plurality of second teeth are arranged at the top of the rotary disc, and are uniformly distributed around the driven shaft and can be meshed with the driving gear; the scraping part comprises a scraping strip and a lifting mechanism for pushing the scraping strip to move up and down.

Preferably, the fixed shaft is arranged along the radial direction of the driven shaft, the outer wall of the fixed shaft is in sliding contact with the inner wall of the movable sleeve, and the number of the first guide grooves is at least two and is uniformly distributed around the fixed shaft.

Preferably, the driving gear is a helical gear, the first teeth and the second teeth have the same included angle with the radial direction of the rotating disc, and the annular teeth formed by the plurality of first teeth are positioned outside the annular teeth formed by the plurality of second teeth.

Preferably, the pushing assembly comprises a spiral piece arranged on the outer side of the driving shaft and a reduction gear rotationally connected with the frame, one side, far away from the center, of the end face of the reduction gear is rotationally connected with a spring, the other end of the spring is rotationally connected with a guide rod, a through groove penetrating through the guide rod is formed in the guide rod, a first sliding block is slidably connected in the through groove, the first sliding block is fixedly connected with a connecting seat, and the connecting seat is rotationally connected with the driving gear.

Preferably, the driving gear is provided with a ball sliding sleeve inside, and the surface of the driving shaft is provided with a plurality of sliding grooves which extend along the axial direction and are matched with the balls of the ball sliding sleeve.

Preferably, elevating system includes the push rod and is used for driving the second driving piece that the push rod reciprocated, the second driving piece sets up the top at the emulsification kettle, the lower extreme of push rod runs through the top of emulsification kettle and extends to inside to the bottom fixedly connected with third ring body of push rod, the top of third ring body is provided with three at least annular evenly distributed's flexible subassembly.

Preferably, the telescopic assembly comprises a second guide groove and a telescopic piece, the second guide groove extends along the radial direction of the third ring body, a second sliding block is connected to the inner portion of the second guide groove in a sliding mode, one end of the telescopic piece is rotatably connected with the top of the third ring body, and the other end of the telescopic piece is rotatably connected with the second sliding block.

Preferably, the one end of scraping the strip with one the second slider fixed connection of flexible subassembly, the remainder the second slider of flexible subassembly all with scrape strip sliding connection, scrape the strip and constitute by having elastic steel sheet and the rubber of parcel in the outside, a plurality of magnetic paths of equidistant distribution on the steel sheet, the both ends of scraping the strip are the inclined plane, and two the inclined plane can laminate each other.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. the application introduces the polyisocyanate compound, the photoinitiator and the ultraviolet absorbent into the acrylic resin prepolymer, enables the water-based acrylic resin to have light curing property and moisture curing property through optimized formula design and unique process control, improves the absorption efficiency of ultraviolet rays through the action of the ultraviolet absorbent, and enables the coating to keep higher curing speed and curing efficiency by matching ultraviolet irradiation in the environment with higher humidity.

2. The utility model provides a vegetation device can stir the solution of different levels through setting up a plurality of rotating assembly, improves the convection current effect of solution in the emulsification kettle, promotes the mixture of solution, and the movable sleeve on the rotating assembly can remove along the fixed axle, because first guide way is the spiral to make the movable sleeve rotate certain angle when removing along the fixed axle, so make stirring vane rotate, change the direction that solution flows, increase the disorder nature that solution flows, promote the solution and mix.

3. This application passes through actuating mechanism control stirring vane's rotatory removal redirecting, drive gear can be respectively with the annular tooth meshing that first tooth and second tooth formed under the drive of advancing the subassembly, because the internal diameter of the annular tooth that first tooth formed is great, so the rotational speed of carousel slows down, the centrifugal force that stirring vane received is less, thereby make stirring vane keep in the one side that is close to the driven shaft, after the annular tooth meshing that drive gear and second tooth formed, the rotational speed of carousel improves, the centrifugal force increase that stirring vane received, move toward the outside of fixing under the effect of centrifugal force, stirring vane and then accomplish the transform of direction.

4. This application makes drive gear along the reciprocal intermittent type removal of drive shaft through setting up the subassembly of advancing, makes drive gear and first tooth and the equal joggle dead time of second tooth, guarantees that stirring vane can maintain an angular rotation, compares in traditional fixed blade stirring, improves the disorder nature that solution flows, improves the efficiency that solution mixes.

Drawings

FIG. 1 is a schematic flow chart of a preparation method provided according to an embodiment of the invention;

FIG. 2 is a schematic diagram illustrating a manufacturing apparatus according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a stirring mechanism and a driving mechanism provided according to an embodiment of the invention;

FIG. 4 is a schematic diagram of a driving mechanism provided according to an embodiment of the present invention;

FIG. 5 is a schematic diagram illustrating a first perspective structure of a rotating assembly provided in accordance with an embodiment of the present invention;

FIG. 6 is a schematic diagram illustrating a second perspective structure of a rotating assembly provided in accordance with an embodiment of the present invention;

FIG. 7 illustrates a schematic view of an inner structure of a movable sleeve provided according to an embodiment of the present invention;

fig. 8 is a schematic view illustrating a first perspective structure of a scraping mechanism according to an embodiment of the present invention;

fig. 9 is a schematic view illustrating a second perspective structure of the scraping mechanism according to the embodiment of the invention;

fig. 10 is a schematic diagram illustrating an explosive structure of the scraping mechanism according to the embodiment of the present invention.

Illustration of the drawings:

1. a frame; 2. a cross beam; 3. a PLC controller; 4. an emulsifying kettle; 5. a feed inlet; 6. a discharge port; 7. a discharge valve; 8. a first driving member; 9. a drive shaft; 10. a drive gear; 11. a ball sliding sleeve; 12. a chute; 13. a turntable; 14. a first tooth; 15. a second tooth; 16. a driven shaft; 17. a fixed shaft; 18. a first ring body; 19. a movable sleeve; 20. a second ring body; 21. a stirring blade; 22. a magnetic ring; 23. a first guide groove; 24. a protrusion; 25. a spiral sheet; 26. a reduction gear; 27. a spring; 28. a guide bar; 29. a first slider; 30. a connecting seat; 31. a push rod; 32. a second driving member; 33. a third ring body; 34. a second guide groove; 35. a second slider; 36. a telescoping member; 37. and (6) scraping the strips.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-10, the present invention provides a technical solution:

s3, preparing a dropwise adding phase, adding a polyisocyanate compound, a photoinitiator and an ultraviolet absorbent into the rest water, and stirring and mixing at the speed of 500-600rpm by using a preparation device;

the preparation device adopted by the preparation method comprises a rack 1, wherein a cross beam 2 and a PLC (programmable logic controller) 3 are arranged on the rack 1, an emulsifying kettle 4 is arranged at the bottom of the cross beam 2, a feeding hole 5 is formed in the upper end of the side surface of the emulsifying kettle 4, a discharging hole 6 and a discharging valve 7 are formed in the bottom of the emulsifying kettle, a driven shaft 16 is arranged at the center of the inside of the emulsifying kettle 4, a plurality of stirring mechanisms which are distributed at equal intervals along the axial direction are arranged on the outer side of the driven shaft 16, a driving mechanism which is used for driving the driven shaft 16 to rotate is arranged on the rack 1, the stirring mechanism is composed of at least two rotating assemblies which are annularly and uniformly distributed around the driven shaft 16, and a scraping part is arranged at the upper end of the inside of the emulsifying kettle 4; the rotating assembly comprises a fixed shaft 17, the fixed shaft 17 is fixedly connected with a driven shaft 16, a first ring body 18 is arranged on the outer side of one end, close to the driven shaft 16, of the fixed shaft 17, a movable sleeve 19 is sleeved on the outer side of the fixed shaft 17, a stirring blade 21 is arranged on one end, far away from the driven shaft 16, of the movable sleeve 19, a second ring body 20 is arranged on the outer side of the other end of the movable sleeve, magnetic rings 22 are arranged on the end faces, close to each other, of the first ring body 18 and the second ring body 20, a spiral first guide groove 23 is formed in the surface of the fixed shaft 17, and a protrusion 24 matched with the first guide groove 23 is formed in the inner side of the movable sleeve 19; the driving mechanism comprises a first driving part 8 and a rotating disc 13, a driving shaft 9 is arranged at the output end of the first driving part 8, a driving gear 10 is arranged at the outer side of the driving shaft 9, a pushing assembly for driving the driving gear 10 to reciprocate along the axial direction of the driving shaft 9 is arranged between the driving shaft 9 and the driving gear 10, a plurality of first teeth 14 and a plurality of second teeth 15 are arranged at the top of the rotating disc 13, and the plurality of first teeth 14 and the plurality of second teeth 15 are uniformly distributed around a driven shaft 16 and can be meshed with the driving gear 10; the scraping part comprises a scraping strip 37 and a lifting mechanism for pushing the scraping strip 37 to move up and down. The fixed shaft 17 is disposed in a radial direction of the driven shaft 16, an outer wall of the fixed shaft 17 is in sliding contact with an inner wall of the movable sleeve 19, and at least two first guide grooves 23 are provided and uniformly distributed around the fixed shaft 17. The driving gear 10 is a helical gear, the first teeth 14 and the second teeth 15 have the same included angle with the radial direction of the rotating disk 13, and the annular teeth formed by the first teeth 14 are positioned outside the annular teeth formed by the second teeth 15. The pushing assembly comprises a spiral piece 25 arranged on the outer side of the driving shaft 9 and a speed reducing gear 26 rotatably connected with the rack 1, one side, far away from the center, of the end face of the speed reducing gear 26 is rotatably connected with a spring 27, the other end of the spring 27 is rotatably connected with a guide rod 28, a through groove penetrating through the guide rod 28 is formed in the guide rod 28, a first sliding block 29 is slidably connected in the through groove, the first sliding block 29 is fixedly connected with a connecting seat 30, and the connecting seat 30 is rotatably connected with the driving gear 10. The drive gear 10 is internally provided with a ball sliding sleeve 11, and the surface of the drive shaft 9 is provided with a plurality of sliding grooves 12 extending in the axial direction and engaged with the balls of the ball sliding sleeve 11. Elevating system includes push rod 31 and the second driving piece 32 that is used for driving push rod 31 and reciprocates, and second driving piece 32 sets up at the top of emulsification kettle 4, and the lower extreme of push rod 31 runs through the top of emulsification kettle 4 and extends to inside to the bottom fixedly connected with third ring body 33 of push rod 31, the top of third ring body 33 is provided with three at least annular evenly distributed's telescopic component. The telescopic assembly comprises a second guide groove 34 and a telescopic piece 36, the second guide groove 34 and the telescopic piece 36 extend along the radial direction of the third ring body 33, a second sliding block 35 is connected to the inner portion of the second guide groove 34 in a sliding mode, one end of the telescopic piece 36 is rotatably connected with the top of the third ring body 33, and the other end of the telescopic piece is rotatably connected with the second sliding block 35. Scrape the one end of strip 37 and the second slider 35 fixed connection of a telescopic subassembly, the second slider 35 of remaining telescopic subassembly all with scrape strip 37 sliding connection, scrape strip 37 by having elastic steel sheet and the rubber of parcel in the outside and constitute, a plurality of magnetic blocks of equidistant distribution on the steel sheet, the both ends of scraping strip 37 are the inclined plane, and two inclined planes can laminate each other.

Specifically, as shown in fig. 5 and 6, a plurality of stirring mechanisms distributed at equal intervals along the axial direction are arranged on the outer side of the driven shaft 16, each stirring mechanism is composed of at least two rotating assemblies which are uniformly distributed around the driven shaft 16 in an annular shape, each rotating assembly comprises a fixed shaft 17, each fixed shaft 17 is fixedly connected with the driven shaft 16, a first ring 18 is arranged on the outer side of one end close to the driven shaft 16, a movable sleeve 19 is sleeved on the outer side of each fixed shaft 17, stirring blades 21 are arranged at one end, far away from the driven shaft 16, of each movable sleeve 19, a second ring 20 is arranged on the outer side of the other end, magnetic rings 22 are arranged on the end faces, close to each other, of the first ring 18 and the second ring 20, a first spiral guide groove 23 is formed in the surface of the fixed shaft 17, and a protrusion 24 matched with the first guide groove 23 is formed in the inner side of the movable sleeve 19. The fixed shaft 17 is disposed in a radial direction of the driven shaft 16, an outer wall of the fixed shaft 17 is in sliding contact with an inner wall of the movable sleeve 19, and at least two first guide grooves 23 are provided and uniformly distributed around the fixed shaft 17.

When the driven shaft 16 rotates at a slower speed, the two magnetic rings 22 attract each other, the movable sleeve 19 is positioned at one side close to the fixed shaft 17, after the rotating speed of the driven shaft 16 is increased, the centrifugal force applied to the movable sleeve 19 is greater than the attraction force of the magnetic rings 22, the movable sleeve 19 moves to one side far away from the fixed shaft 17 by the centrifugal force, and meanwhile, the protrusion 24 slides along the first guide groove 23, so that the angle of the stirring blade 21 is changed, and the flowing direction of the solution is changed along with the rotation of the driven shaft 16. The opposite angles of the stirring blades 21 of two adjacent rotating assemblies along the axial direction of the driven shaft 16 are arranged, so that the disorder of the solution flowing is further increased, and the efficient mixing of the solution is promoted.

Specifically, as shown in fig. 3 and 4, a driving mechanism for driving the driven shaft 16 to rotate is arranged on the rack 1, the driving mechanism includes a first driving part 8 and a rotating disk 13, an output end of the first driving part 8 is provided with a driving shaft 9, a driving gear 10 is arranged outside the driving shaft 9, a pushing component for driving the driving gear 10 to reciprocate along an axial direction of the driving shaft 9 is arranged between the driving shaft 9 and the driving gear 10, the top of the rotating disk 13 is provided with a plurality of first teeth 14 and a plurality of second teeth 15, and the plurality of first teeth 14 and the plurality of second teeth 15 are uniformly distributed around the driven shaft 16 and are all meshed with the driving gear 10. The driving gear 10 is a helical gear, the first teeth 14 and the second teeth 15 have the same included angle with the radial direction of the rotating disk 13, and the annular teeth formed by the first teeth 14 are positioned outside the annular teeth formed by the second teeth 15. The pushing assembly comprises a spiral piece 25 arranged on the outer side of the driving shaft 9 and a speed reducing gear 26 rotatably connected with the rack 1, one side, far away from the center, of the end face of the speed reducing gear 26 is rotatably connected with a spring 27, the other end of the spring 27 is rotatably connected with a guide rod 28, a through groove penetrating through the guide rod 28 is formed in the guide rod 28, a first sliding block 29 is slidably connected in the through groove, the first sliding block 29 is fixedly connected with a connecting seat 30, and the connecting seat 30 is rotatably connected with the driving gear 10. The drive gear 10 is internally provided with a ball sliding sleeve 11, and the surface of the drive shaft 9 is provided with a plurality of sliding grooves 12 extending in the axial direction and engaged with the balls of the ball sliding sleeve 11.

The first driving part 8 drives the driving shaft 9 to rotate, the driving gear 10 drives the rotating disc 13 to rotate through meshing with the first teeth 14 or the second teeth 15, and further drives the driven shaft 16 to rotate, and the first teeth 14 are positioned on the outer side of the second teeth 15, so that the inner diameter of annular teeth formed by the first teeth 14 is larger than that of the second teeth 15, when the driving gear 10 is meshed with the first teeth 14, the rotating speed of the rotating disc 13 is slower, and the rotating speed when the driving gear is meshed with the second teeth 15 is faster. The spiral piece 25 pushes the reduction gear 26 to rotate while the driving shaft 9 rotates, the guide rod 28 is pushed to move along the axial direction of the driving shaft 9 through the spring 27, the spring 27 is compressed when the guide rod 28 is pushed, the guide rod 28 can be pushed to move only after the compression is limited, the sliding time of the first sliding block 29 in the through groove and the staying time at one end of the through groove are the time when the stirring blade 21 keeps rotating stably at the same angle, and the guide rod 28 can move back and forth in a clearance mode through the continuous rotation of the reduction gear 26.

Specifically, as shown in fig. 8, 9 and 10, a scraping portion is provided at an upper end inside the emulsifying kettle 4, and the scraping portion includes a scraping bar 37 and a lifting mechanism for pushing the scraping bar 37 to move up and down. Elevating system includes push rod 31 and the second driving piece 32 that is used for driving push rod 31 and reciprocates, and second driving piece 32 sets up at the top of emulsification kettle 4, and the lower extreme of push rod 31 runs through the top of emulsification kettle 4 and extends to inside to the bottom fixedly connected with third ring body 33 of push rod 31, the top of third ring body 33 is provided with three at least annular evenly distributed's telescopic component. The telescopic assembly comprises a second guide groove 34 and a telescopic piece 36, the second guide groove 34 and the telescopic piece 36 extend along the radial direction of the third ring body 33, a second sliding block 35 is connected to the inner portion of the second guide groove 34 in a sliding mode, one end of the telescopic piece 36 is rotatably connected with the top of the third ring body 33, and the other end of the telescopic piece is rotatably connected with the second sliding block 35. Scrape the one end of strip 37 and the second slider 35 fixed connection of a telescopic subassembly, the second slider 35 of remaining telescopic subassembly all with scrape strip 37 sliding connection, scrape strip 37 by having elastic steel sheet and the rubber of parcel in the outside and constitute, a plurality of magnetic blocks of equidistant distribution on the steel sheet, the both ends of scraping strip 37 are the inclined plane, and two inclined planes can laminate each other.

Scrape strip 37 when being located the inside upper end of emulsion cauldron 4, the elastic force that receives the steel sheet is the loop configuration, and laminate with the inside lateral wall of emulsion cauldron 4, second driving piece 32 can drive push rod 31 down and remove, make scrape strip 37 will attach to the down push down of remaining on the 4 inner walls of emulsion cauldron, when push rod 31 will scrape strip 37 and push away to the bottom of emulsion cauldron 4, extensible member 36 starts the shrink, it removes along second guide way 34 to drive second slider 35, make the loop configuration shrink of scraping strip 37 formation, along with the continuation decline of push rod 31, make the bottom of scraping strip 37 and pasting emulsion cauldron 4 push away, thereby realize pushing out emulsion cauldron 4 with the defective material fast.

In summary, in the preparation method of the water-based acrylic resin provided in this embodiment, in the first step, a sample is weighed, and the sample comprises the following components in parts by weight: 30-50 parts of acrylic resin prepolymer, 20-30 parts of polyisocyanate compound, 10-15 parts of photoinitiator, 5-8 parts of ultraviolet absorbent, 2-6 parts of defoaming agent, 1-3 parts of emulsifier, 1-2 parts of dispersant, 5-10 parts of tackifying resin, 3-5 parts of high molecular adhesive and 80 parts of water, wherein the acrylic resin prepolymer is formed by polymerizing methyl methacrylate monomer, styrene and 2-ethyl methacrylate monomer, the polyisocyanate compound is one or a mixture of more of toluene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate and lysine diisocyanate, the photoinitiator is diaryl iodonium salt, the ultraviolet absorbent is phenyl o-hydroxybenzoate, phenyl ester, methyl methacrylate, styrene, methyl methacrylate, styrene, ethylene glycol, styrene, hexamethylene diisocyanate, styrene, one of dihydroxy benzophenone, 2-hydroxy-4-methoxy benzophenone and 2-hydroxy-4-n-octoxy benzophenone; secondly, preparing a priming phase, namely adding the acrylic resin prepolymer, the defoaming agent, the emulsifier, the tackifying resin and the high-molecular adhesive into 50-60 parts of water, and stirring and mixing at the speed of 500-600rpm by using a preparation device; thirdly, preparing a dropping phase, namely adding the polyisocyanate compound, the photoinitiator and the ultraviolet absorbent into the rest water, and stirring and mixing at the speed of 500-600rpm by using a preparation device; and the fourth step of polymerization, heating the priming phase to keep the temperature at 80-90 ℃, stirring the priming phase at the speed of 100-.

The previous description of the embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The preparation method of the water-based acrylic resin is characterized by comprising the following steps:

the preparation device adopted by the preparation method comprises a rack (1), wherein a cross beam (2) and a PLC (programmable logic controller) are arranged on the rack (1), an emulsifying kettle (4) is arranged at the bottom of the cross beam (2), a feeding hole (5) is formed in the upper end of the side face of the emulsifying kettle (4), a discharging hole (6) and a discharging valve (7) are formed in the bottom of the emulsifying kettle, a driven shaft (16) is arranged at the center of the inside of the emulsifying kettle (4), a plurality of stirring mechanisms which are distributed at equal intervals along the axial direction are arranged on the outer side of the driven shaft (16), a driving mechanism for driving the driven shaft (16) to rotate is arranged on the rack (1), each stirring mechanism comprises at least two rotating assemblies which are uniformly distributed around the driven shaft (16) in an annular mode, and a material scraping part is arranged at the upper end of the inside of the emulsifying kettle (4);

the rotating assembly comprises a fixed shaft (17), the fixed shaft (17) is fixedly connected with the driven shaft (16), a first ring body (18) is arranged on the outer side of one end, close to the driven shaft (16), of the fixed shaft (17), a movable sleeve (19) is sleeved on the outer side of the fixed shaft (17), a stirring blade (21) is arranged at one end, far away from the driven shaft (16), of the movable sleeve (19), a second ring body (20) is arranged on the outer side of the other end of the movable sleeve (19), magnetic rings (22) are arranged on the end faces, close to each other, of the first ring body (18) and the second ring body (20), a spiral first guide groove (23) is formed in the surface of the fixed shaft (17), and a protrusion (24) matched with the first guide groove (23) is formed in the inner side of the movable sleeve (19);

the driving mechanism comprises a first driving part (8) and a rotary table (13), a driving shaft (9) is arranged at the output end of the first driving part (8), a driving gear (10) is arranged on the outer side of the driving shaft (9), a pushing component for driving the driving gear (10) to move in a reciprocating mode along the axial direction of the driving shaft (9) is arranged between the driving shaft (9) and the driving gear (10), a plurality of first teeth (14) and a plurality of second teeth (15) are arranged at the top of the rotary table (13), and the first teeth (14) and the second teeth (15) are uniformly distributed around a driven shaft (16) and can be meshed with the driving gear (10);

the scraping part comprises a scraping strip (37) and a lifting mechanism for pushing the scraping strip (37) to move up and down.

2. The method for preparing a water-based acrylic resin as claimed in claim 1, wherein said fixed shaft (17) is disposed along a radial direction of the driven shaft (16), an outer wall of said fixed shaft (17) is in sliding contact with an inner wall of the movable sleeve (19), and said first guide grooves (23) are disposed in at least two and uniformly distributed around the fixed shaft (17).

3. The method for preparing the water-based acrylic resin as claimed in claim 1, wherein the driving gear (10) is a helical gear, the first teeth (14) and the second teeth (15) have the same included angle with the radial direction of the rotating disc (13), and the annular teeth formed by the plurality of first teeth (14) are positioned outside the annular teeth formed by the plurality of second teeth (15).

4. The preparation method of the water-based acrylic resin as claimed in claim 1, wherein the pushing assembly comprises a spiral plate (25) arranged outside the driving shaft (9) and a reduction gear (26) rotatably connected with the frame (1), one side of the end surface of the reduction gear (26) far away from the center is rotatably connected with a spring (27), the other end of the spring (27) is rotatably connected with a guide rod (28), a through groove penetrates through the guide rod (28), a first sliding block (29) is slidably connected in the through groove, the first sliding block (29) is fixedly connected with a connecting seat (30), and the connecting seat (30) is rotatably connected with the driving gear (10).

5. The method for preparing the water-based acrylic resin as claimed in claim 1, wherein a ball sliding sleeve (11) is disposed inside the driving gear (10), and the surface of the driving shaft (9) has a plurality of sliding grooves (12) extending along the axial direction and engaged with the balls of the ball sliding sleeve (11).

6. The preparation method of the water-based acrylic resin as claimed in claim 1, wherein the lifting mechanism comprises a push rod (31) and a second driving member (32) for driving the push rod (31) to move up and down, the second driving member (32) is disposed at the top of the emulsification kettle (4), the lower end of the push rod (31) extends to the inside through the top of the emulsification kettle (4), a third ring body (33) is fixedly connected to the bottom of the push rod (31), and at least three ring-shaped telescopic assemblies are disposed at the top of the third ring body (33).

7. The method for preparing the water-based acrylic resin as claimed in claim 6, wherein the telescopic assembly comprises a second guide groove (34) extending along the radial direction of the third ring body (33) and a telescopic member (36), the second guide groove (34) is internally connected with a second slide block (35) in a sliding manner, one end of the telescopic member (36) is rotatably connected with the top of the third ring body (33), and the other end of the telescopic member is rotatably connected with the second slide block (35).

8. The preparation method of the water-based acrylic resin as claimed in claim 7, wherein one end of the scraping strip (37) is fixedly connected with the second sliding block (35) of one of the telescopic assemblies, the remaining second sliding blocks (35) of the telescopic assemblies are slidably connected with the scraping strip (37), the scraping strip (37) is composed of an elastic steel sheet and rubber wrapped on the outer side, a plurality of magnetic blocks are distributed on the steel sheet at equal intervals, both ends of the scraping strip (37) are inclined surfaces, and the two inclined surfaces can be attached to each other.