CN115672075B - Preparation process of water-based resin - Google Patents
Preparation process of water-based resin Download PDFInfo
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- CN115672075B CN115672075B CN202211695445.7A CN202211695445A CN115672075B CN 115672075 B CN115672075 B CN 115672075B CN 202211695445 A CN202211695445 A CN 202211695445A CN 115672075 B CN115672075 B CN 115672075B
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Abstract
The invention discloses a preparation process of water-based resin, which adopts a device comprising an emulsifying tank, wherein the top end of the emulsifying tank is provided with a cover body, the cover body is provided with a feed inlet, the bottom of the emulsifying tank is provided with a discharge outlet, the center of the cover body is rotatably provided with an upper through pipe, the bottom of the emulsifying tank is rotatably provided with a lower through pipe which is coaxial with the upper through pipe, a circulating cooling assembly is arranged between the top end of the upper through pipe and the bottom end of the lower through pipe, the bottom end of the upper through pipe and the top end of the lower through pipe are both connected with water-homogenizing discs, a stirring assembly is arranged between the upper water-homogenizing disc and the lower water-homogenizing disc, and the stirring assembly comprises a plurality of uniformly distributed stirring rods. According to the invention, the emulsification tank and the stirring assembly are utilized, and the circulating cooling assembly is utilized to enable the raw materials to be always controlled to be mixed, emulsified and dispersed in a low-temperature environment, so that the emulsification temperature can be more effectively controlled to be not higher than the critical point temperature of the reaction between water and-NCO groups, the mixing, emulsifying and dispersing efficiency is improved, and adverse effects on the preparation of polyurethane caused by the side reaction between the-NCO groups and water are avoided.
Description
Technical Field
The invention relates to the technical field of aqueous resin emulsification preparation, in particular to a preparation process of aqueous resin.
Background
The aqueous resin is a novel resin system using water as a dispersion medium instead of an organic solvent. And fusing with water to form a solution, and forming a resin film material after the water is volatilized. Aqueous polyurethanes are typical representatives of aqueous resins and are widely used in paints, adhesives, textile coatings and finishes, leather finishes, paper surface treatment agents, and fiber surface treatment agents, etc.
The preparation method of the aqueous polyurethane can be generally divided into an external emulsification method and an internal emulsification method. The internal emulsification method is also called self-emulsification method, which refers to a method of introducing hydrophilic groups in the molecular structure of polyurethane and dispersing the hydrophilic groups into emulsion without using an emulsifier, so that the method becomes a main method adopted in the production and research of the existing waterborne polyurethane. The internal emulsification method can be classified into acetone method, prepolymer mixing method, melt dispersion method, ketimine/ketone nitrogen-linking method, and protective end group emulsification method. At present, in a preparation process for preparing waterborne polyurethane by a prepolymer mixing method, a homogenizing shaft is usually rotated at a high speed to emulsify and disperse raw materials, the emulsifying temperature is high due to heat generated by high-speed friction between the homogenizing shaft and the raw materials, once the emulsifying temperature exceeds the critical point temperature of reaction between water and a-NCO group, a side reaction can be caused between the-NCO group and the water to influence the preparation of the waterborne polyurethane, and the temperature control process of the existing emulsifying equipment in the stirring and emulsifying process cannot meet the preparation requirement of the high-quality waterborne polyurethane.
Disclosure of Invention
The invention aims to provide a preparation process of a water-based resin, and aims to solve the technical problems.
The purpose of the invention can be realized by the following technical scheme:
a preparation process of water-based resin is characterized in that a device adopted by the preparation process comprises an emulsifying tank, a cover body is arranged at the top end of the emulsifying tank, a feed inlet is formed in the cover body, a discharge outlet is formed in the bottom of the emulsifying tank, an upper through pipe is arranged in the center of the cover body in a rotating mode, a lower through pipe which is coaxial with the upper through pipe is arranged at the bottom of the emulsifying tank in a rotating mode, a circulating cooling assembly is arranged between the top end of the upper through pipe and the bottom end of the lower through pipe, water homogenizing discs are connected to the bottom end of the upper through pipe and the top end of the lower through pipe respectively, a stirring assembly is arranged between the upper water homogenizing disc and the lower water homogenizing disc and comprises a plurality of stirring rods which are uniformly distributed, the water homogenizing discs and the stirring rods are of hollow structures, the two ends of the stirring rods are communicated with the upper through pipe and the lower through pipe respectively through the water homogenizing discs, a cleaning assembly for cleaning the inner wall of the emulsifying tank is arranged on the outer side of the stirring rods, and a driving assembly for driving the upper through pipe and the stirring assembly to rotate is arranged on the cover body;
the circulating cooling assembly comprises a spiral pipe, a circulating water pump, a water tank, an upper connecting pipe and a lower connecting pipe, the spiral pipe is wrapped and arranged on the outer side of the emulsifying tank, the water tank is arranged at the upper end of the cover body, the water inlet end of the circulating water pump is communicated with the water tank through a water inlet pipe, the water outlet end of the circulating water pump is communicated with one end of the spiral pipe, the other end of the spiral pipe is communicated with the lower connecting pipe, the lower through pipe is rotatably communicated and arranged on the lower connecting pipe, the upper connecting pipe is connected with the water tank, and the upper through pipe is rotatably communicated and arranged on the upper connecting pipe;
the preparation process comprises the following steps:
the method comprises the following steps: adding raw materials, filling a water source into an emulsification tank, reacting a proper amount of compound containing active hydrogen with excessive diisocyanate to synthesize a prepolymer with medium molecular weight, and adding the prepolymer into the emulsification tank;
step two: stirring and emulsifying, namely driving the upper through pipe and the stirring component to rotate at a high speed through the driving component to emulsify and disperse the raw materials;
step three: adding an emulsifier, and adding a diamine hydrophilic monomer serving as an internal emulsifier into an emulsifying tank to generate the aqueous polyurethane-urea with high relative molecular weight;
step four: and (3) controlling the temperature, namely introducing cooling liquid into the spiral pipe and the stirring rod by using the circulating cooling assembly, and controlling the emulsifying temperature to be not higher than the critical point temperature of the reaction of water and the-NCO group, so as to finally obtain the waterborne polyurethane dispersion liquid.
As a further scheme of the invention: the puddler is for buckling the wavy knee that sets up in succession, and is a plurality of be provided with the backup pad between the inboard department of buckling of puddler, fixedly connected with bracing piece in the backup pad, the bracing piece both ends are connected with two upper and lower even water discs respectively.
As a further scheme of the invention: the clearance subassembly includes scraper blade, solid fixed cylinder, activity post and gasbag, gu fixed cylinder is connected with the puddler, activity post slidable mounting is in gu fixed cylinder, one side and the activity post fixed connection of scraper blade orientation puddler, the scraper blade outside is provided with the brush, the gasbag sets up in gu fixed cylinder and is connected with the activity post.
As a further scheme of the invention: the fixed cylinder is characterized in that a limiting groove is formed in the inner wall of the fixed cylinder, a limiting block matched with the limiting groove is connected to the outer wall of the movable column, and the limiting block is clamped and installed in the limiting groove.
As a further scheme of the invention: the drive assembly includes driving motor, sprocket and chain belt, driving motor is fixed to be set up on the lid, the equal fixed cup of outside of driving motor output shaft and last siphunculus has connect the sprocket, two be connected through the chain belt between the sprocket.
As a further scheme of the invention: go up all to be provided with on connecting pipe and the lower connecting pipe and rotate the hole seat, go up siphunculus and down siphunculus adaptation rotation respectively and install in the rotation hole seat that corresponds, it has the water service groove that equidistant set up all to run through on siphunculus and the siphunculus down to go up, go up siphunculus and down siphunculus and be linked together with last connecting pipe and lower connecting pipe respectively through the water service groove.
As a further scheme of the invention: and the outer side of the spiral pipe is wrapped with a heat insulation layer.
As a further scheme of the invention: the emulsion tank bottom fixedly connected with a plurality of supporting legs that the equidistance set up, the supporting legs outwards expands the setting.
The invention has the beneficial effects that:
(1) According to the invention, the spiral pipe in the circulating cooling assembly is coated on the periphery of the emulsifying tank, so that the whole inside of the emulsifying tank can be in a low-temperature environment, the stirring rod can be always kept in a low-temperature state by the cooling liquid circulating in the stirring rod in the high-speed rotating process, the raw materials can be always controlled to be mixed, emulsified and dispersed in the low-temperature environment by the emulsifying tank and the stirring assembly through the circulating cooling assembly, the emulsifying temperature can be more effectively controlled to be not higher than the critical point temperature of the reaction between water and-NCO groups, the mixing, emulsifying and dispersing efficiency is improved, and adverse effects on the preparation of polyurethane caused by the side reaction between the-NCO groups and water are avoided;
(2) According to the invention, the water source in the water tank is heated and then is introduced into the stirring rod and the spiral pipe in a circulating manner, the air bag is expanded outwards by means of expansion with heat and contraction with cold, the movable column and the scraper are pushed to extend outwards until the movable column and the scraper are abutted against the inner wall of the emulsifying tank, so that the scraper can effectively clean residual media on the inner wall of the emulsifying tank through the hairbrush in the rotating process, and the residual media can be favorably dropped by combining the heating effect of the spiral pipe on the emulsifying tank, and the cleaning effect is further enhanced.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view showing the internal structure of an emulsification tank according to the present invention;
FIG. 3 is a schematic view of the structure of the circulation cooling module of the present invention;
FIG. 4 is a schematic view of the construction of the stirring rod of the present invention;
FIG. 5 is a schematic view of the cleaning assembly of the present invention;
FIG. 6 is a schematic view of the drive assembly of the present invention;
FIG. 7 is a schematic connection diagram of the upper tube of the present invention;
FIG. 8 is a schematic view of the connection of the down tube in the present invention.
In the figure: 1. an emulsification tank; 101. a discharge port; 102. supporting legs; 2. a cover body; 201. a feed inlet; 3. an upper pipe; 4. downward pipe passing; 5. a circulating cooling assembly; 501. a spiral tube; 502. a water circulating pump; 503. a water tank; 504. an upper connecting pipe; 505. a lower connecting pipe; 506. a water inlet pipe; 507. rotating the hole seat; 508. a water trough; 509. a thermal insulation layer; 6. a water homogenizing disc; 7. a stirring rod; 701. a support plate; 702. a support bar; 8. cleaning the assembly; 801. a squeegee; 802. a fixed cylinder; 803. a movable post; 804. an air bag; 805. a brush; 806. a limiting groove; 807. a limiting block; 9. a drive assembly; 901. a drive motor; 902. a sprocket; 903. a chain belt.
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. 1-3, the invention is a preparation process of water-based resin, the preparation process adopts a device comprising an emulsification tank 1, a cover body 2 is arranged at the top end of the emulsification tank 1, a feed inlet 201 is arranged on the cover body 2, a discharge outlet 101 is arranged at the bottom of the emulsification tank 1, an upper through pipe 3 is rotatably arranged at the center of the cover body 2, a lower through pipe 4 coaxially arranged with the upper through pipe 3 is rotatably arranged at the bottom of the emulsification tank 1, a circulating cooling assembly 5 is arranged between the top end of the upper through pipe 3 and the bottom end of the lower through pipe 4, a water homogenizing disc 6 is connected to the bottom end of the upper through pipe 3 and the top end of the lower through pipe 4, a stirring assembly is arranged between the upper and lower water homogenizing discs 6, the stirring assembly comprises a plurality of uniformly distributed stirring rods 7, the water homogenizing disc 6 and the stirring rods 7 are both hollow structures, both ends of the stirring rods 7 are respectively communicated with the upper through pipe 3 and the lower through pipe 4 through the water homogenizing disc 6, a cleaning assembly 8 for cleaning the inner wall of the emulsification tank 1 is arranged outside the stirring rods 7, and a driving assembly 9 for driving the upper through pipe 3 and the stirring assembly to rotate is arranged on the cover body 2;
the circulating cooling assembly 5 comprises a spiral pipe 501, a circulating water pump 502, a water tank 503, an upper connecting pipe 504 and a lower connecting pipe 505, the spiral pipe 501 is wrapped outside the emulsifying tank 1, the water tank 503 is arranged at the upper end of the cover body 2, the water inlet end of the circulating water pump 502 is communicated with the water tank 503 through a water inlet pipe 506, the water outlet end of the circulating water pump 502 is communicated with one end of the spiral pipe 501, the other end of the spiral pipe 501 is communicated with the lower connecting pipe 505, a lower through pipe 4 is rotatably communicated with the lower connecting pipe 505, the upper connecting pipe 504 is connected with the water tank 503, and an upper through pipe 3 is rotatably communicated with the upper connecting pipe 504;
specifically, the circulating water pump 502 pumps cooling liquid into the spiral pipe 501 from the water tank 503, the cooling liquid flows through the lower connecting pipe 505 into the water homogenizing disc 6 after flowing through the spiral pipe 501, then flows into the plurality of hollow stirring rods 7 uniformly, and finally flows back into the water tank 503 through the upper pipe 3 and the upper connecting pipe 504 in sequence, in the process, the spiral pipe 501 is coated on the periphery of the emulsifying tank 1, so that the whole inside of the emulsifying tank 1 can be in a low-temperature environment, and in the high-speed rotation process of the stirring rods 7, the stirring rods 7 can be kept in a low-temperature state all the time by the cooling liquid circulating and flowing through the inside of the stirring rods 7, so that the raw materials can be controlled to be mixed, emulsified and dispersed in the low-temperature environment all the time by the emulsifying tank and the stirring assembly and the circulating cooling assembly, the emulsifying temperature can be controlled to be not higher than the critical point temperature of the reaction of water and the-NCO groups more effectively, the mixed emulsifying and dispersed efficiency is improved, and the adverse effect of the production of side reaction of polyurethane due to the production of the-NCO groups is avoided.
The preparation process comprises the following steps:
the method comprises the following steps: adding raw materials, filling a water source into an emulsification tank 1, reacting a proper amount of compound containing active hydrogen with excessive diisocyanate to synthesize a prepolymer with medium molecular weight, and adding the prepolymer into the emulsification tank 1;
step two: stirring and emulsifying, namely driving the upper through pipe 3 and the stirring component to rotate at a high speed through the driving component 9 to emulsify and disperse the raw materials;
step three: adding an emulsifier, and adding a diamine hydrophilic monomer serving as an internal emulsifier into the emulsifying tank 1 to generate the aqueous polyurethane-urea with high relative molecular weight;
step four: and (3) controlling the temperature, namely introducing cooling liquid into the spiral pipe 501 and the stirring rod 7 by using the circulating cooling assembly 5, and controlling the emulsifying temperature to be not higher than the critical point temperature of the reaction between water and the-NCO group, so as to finally obtain the waterborne polyurethane dispersion liquid.
As shown in fig. 4, the stirring rods 7 are wave-shaped bent rods arranged in a continuous bending manner, a supporting plate 701 is arranged between the inner bending portions of the stirring rods 7, a supporting rod 702 is fixedly connected to the supporting plate 701, and two ends of the supporting rod 702 are respectively connected to the upper and lower water-homogenizing disks 6.
Specifically, the contact area between the stirring rod 7 and the raw materials in the emulsification tank 1 can be effectively increased through the continuous bending structural design of the stirring rod 7, so that on one hand, the stirring effect can be enhanced, the raw materials can be uniformly stirred and emulsified, on the other hand, the contact area between the stirring rod 7 and the raw materials is increased, the temperature of the emulsification process can be better controlled by using the cooling liquid circulating in the stirring rod 7, and the improvement of the product quality is facilitated; backup pad 701 makes a plurality of puddlers 7 form wholly, can carry out synchronous rotation, combines bracing piece 702 can effectively increase structural support intensity, guarantees the stability of puddler 7 rotatory in-process.
As shown in fig. 5, the cleaning assembly 8 includes a scraper 801, a fixed cylinder 802, a movable column 803 and an air bag 804, the fixed cylinder 802 is connected with the stirring rod 7, the movable column 803 is slidably mounted in the fixed cylinder 802, one side of the scraper 801 facing the stirring rod 7 is fixedly connected with the movable column 803, a brush 805 is arranged outside the scraper 801, and the air bag 804 is disposed in the fixed cylinder 802 and connected with the movable column 803.
Specifically, in the preparation process, as the cooling liquid flows through the inside of the stirring rod 7, the temperature of the gas in the gas bag 804 is relatively low, the gas bag 804 contracts inwards at this time, the movable column 803 drives the scraper 801 to retreat, the scraper 801 and the brush 805 do not contact with the inner wall of the emulsification tank 1 at this time, the scraper 801 plays a role in assisting stirring at this time, after the preparation is completed, in order to clean the residual medium on the inner wall of the emulsification tank 1, a water source in the water tank 503 can be heated through a heating device (not shown in the figure), and then the water is circulated and led into the stirring rod 7 and the spiral tube 501, the temperature of the gas in the gas bag 804 gradually rises, the gas bag 804 also expands outwards, the movable column 803 and the scraper 801 are pushed to extend outwards until the movable column 803 and the scraper 801 abut against the inner wall of the emulsification tank 1, at this time, when the driving component 9 drives the stirring rod 7 and the scraper 801 to rotate, the brush 805 on the scraper 801 can effectively clean the residual medium on the inner wall of the emulsification tank 1, the spiral tube 501 is combined with the heating effect of heating of the emulsification tank 1, which is beneficial to the residual medium, and further enhances the cleaning effect.
Further, a limiting groove 806 is formed in the inner wall of the fixed cylinder 802, a limiting block 807 matched with the limiting groove 806 is connected to the outer wall of the movable column 803, and the limiting block 807 is clamped and installed in the limiting groove 806.
Specifically, stirring subassembly and clearance subassembly 8 are at the synchronous revolution in-process, and stopper 807 blocks all the time in spacing groove 806, utilizes spacing groove 806 to retrain the restriction to activity post 803 for activity post 803 can only do linear displacement and can not take place relative rotation for a fixed cylinder 802, has guaranteed the stability of scraper blade 801 when the clearance is scraped in the rotation.
As shown in fig. 6, the driving assembly 9 includes a driving motor 901, a sprocket 902 and a chain belt 903, the driving motor 901 is fixedly disposed on the cover 2, the sprocket 902 is fixedly connected to an output shaft of the driving motor 901 and an outer side of the upper through pipe 3, and the two sprockets 902 are connected to each other by the chain belt 903.
Specifically, the driving motor 901 drives the upper through pipe 3 to rotate through the chain belt 903, and the rotation of the upper through pipe 3 can drive the stirring assembly and the lower through pipe 4 to synchronously rotate, so that stirring emulsification or rotary cleaning is performed. It should be noted that the sprocket 902 and the chain 903 are only one preferred structure of the driving assembly 9, and those skilled in the art can also replace other structures according to the functions to be achieved, for example, the upper tube 3 is driven to rotate by using a gear engagement transmission, and the transmission structure can achieve the same functions as the sprocket 902 and the chain 903, so that the structural form of the driving assembly 9 is considered to be various and is not limited to the two structures described above.
As shown in fig. 7 and 8, each of the upper connection pipe 504 and the lower connection pipe 505 is provided with a rotation hole seat 507, the upper pipe 3 and the lower pipe 4 are rotatably fitted into the corresponding rotation hole seats 507, water passing grooves 508 are provided at equal intervals on the upper pipe 3 and the lower pipe 4, and the upper pipe 3 and the lower pipe 4 are respectively communicated with the upper connection pipe 504 and the lower connection pipe 505 through the water passing grooves 508.
Specifically, the rotating hole seat 507 ensures the stability of the upper pipe 3 and the lower pipe 4 in the rotating process, and meanwhile, a plurality of water passing grooves 508 are always communicated in the rotating process of the upper pipe 3 and the lower pipe 4, and smooth circulation of the cooling liquid is ensured by the water passing grooves 508. The joints between the upper through pipe 3 and the upper connecting pipe 504 and between the lower through pipe 4 and the lower connecting pipe 505 are all sealed, so that the sealing performance is improved, and liquid in the pipes is prevented from leaking.
As shown in fig. 2, the outside of the spiral pipe 501 is wrapped with a thermal insulation layer 509. The heat insulation layer 509 can prevent the temperature of the circulating medium in the spiral pipe 501 from being interfered by the external environment to influence the temperature control process of the emulsification tank 1.
As shown in fig. 1 and fig. 2, a plurality of support feet 102 are fixedly connected to the bottom of the emulsification tank 1, and the support feet 102 are arranged to extend outwards.
Specifically, supporting legs 102 can support emulsification tank 1 by a certain height, so that discharging is facilitated, and supporting legs 102 expand outwards to effectively increase the supporting area of supporting legs 102, which is beneficial to improving the stability of the tank body.
The working principle of the invention is as follows: during the preparation of the waterborne polyurethane, firstly, a water source is filled in an emulsification tank 1, a proper amount of compound containing active hydrogen reacts with excessive diisocyanate, a prepolymer with medium molecular weight is synthesized and added into the emulsification tank 1, then an upper pipe 3 and a stirring component are driven by a driving component 9 to rotate at high speed to emulsify and disperse the raw materials, hydrophilic monomer-diamine is added into the emulsification tank 1 as an internal emulsifier to generate waterborne polyurethane-urea with high relative molecular weight, in the process, a circulating water pump 502 pumps cooling liquid into a spiral pipe 501 from a water tank 503, the cooling liquid flows through the spiral pipe 501 and then enters a water homogenizing disc 6 through a lower connecting pipe 505, then flows into a plurality of hollow stirring rods 7, and finally flows back into the water tank 503 through the upper pipe 3 and the upper connecting pipe 504 in sequence, so that the raw materials can be controlled to be mixed and emulsified in a low-temperature environment all the time by utilizing the emulsification tank and the stirring component and the circulating cooling component, the raw materials can be controlled to be mixed and emulsified and dispersed in a low-temperature environment, the emulsification temperature can be controlled more effectively, the emulsification temperature can not influence the NCO-high water-dispersing reaction on the production of the polyurethane, and the NCO-side reaction can be avoided.
Although one embodiment of the present invention has been described in detail, the description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (5)
1. The preparation process of the water-based resin is characterized in that a device adopted by the preparation process comprises an emulsification tank (1), the top end of the emulsifying tank (1) is provided with a cover body (2), the cover body (2) is provided with a feeding hole (201), a discharge hole (101) is arranged at the bottom of the emulsification tank (1), an upper through pipe (3) is rotatably arranged at the center of the cover body (2), a lower through pipe (4) which is coaxial with the upper through pipe (3) is rotatably arranged at the bottom of the emulsification tank (1), a circulating cooling component (5) is arranged between the top end of the upper through pipe (3) and the bottom end of the lower through pipe (4), the bottom end of the upper through pipe (3) and the top end of the lower through pipe (4) are both connected with water homogenizing discs (6), a stirring component is arranged between the upper water homogenizing disc (6) and the lower water homogenizing disc (6), the stirring component comprises a plurality of stirring rods (7) which are uniformly distributed, the water homogenizing disc (6) and the stirring rods (7) are both of hollow structures, and the two ends of the stirring rod (7) are respectively communicated with the upper through pipe (3) and the lower through pipe (4) through a water homogenizing disc (6), a cleaning component (8) for cleaning the inner wall of the emulsifying tank (1) is arranged on the outer side of the stirring rod (7), the cover body (2) is provided with a driving component (9) for driving the upper through pipe (3) and the stirring component to rotate;
the circulating cooling assembly (5) comprises a spiral pipe (501), a circulating water pump (502), a water tank (503), an upper connecting pipe (504) and a lower connecting pipe (505), the spiral pipe (501) is wrapped and arranged on the outer side of the emulsifying tank (1), the water tank (503) is arranged at the upper end of the cover body (2), the water inlet end of the circulating water pump (502) is communicated with the water tank (503) through a water inlet pipe (506), the water outlet end of the circulating water pump (502) is communicated with one end of the spiral pipe (501), the other end of the spiral pipe (501) is communicated with the lower connecting pipe (505), the lower through pipe (4) is rotatably communicated with the lower connecting pipe (505), the upper connecting pipe (504) is connected with the water tank (503), and the upper through pipe (3) is rotatably communicated with the upper connecting pipe (504);
the stirring rods (7) are wave-shaped bent rods which are continuously bent, a supporting plate (701) is arranged between the bent parts at the inner sides of the stirring rods (7), a supporting rod (702) is fixedly connected onto the supporting plate (701), and two ends of the supporting rod (702) are respectively connected with an upper water homogenizing disc (6) and a lower water homogenizing disc (6);
the cleaning assembly (8) comprises a scraper (801), a fixed cylinder (802), a movable column (803) and an air bag (804), the fixed cylinder (802) is connected with the stirring rod (7), the movable column (803) is slidably mounted in the fixed cylinder (802), one side of the scraper (801), which faces the stirring rod (7), is fixedly connected with the movable column (803), a brush (805) is arranged on the outer side of the scraper (801), and the air bag (804) is arranged in the fixed cylinder (802) and is connected with the movable column (803);
a limiting groove (806) is formed in the inner wall of the fixed cylinder (802), a limiting block (807) matched with the limiting groove (806) is connected to the outer wall of the movable column (803), and the limiting block (807) is clamped and installed in the limiting groove (806);
the preparation process comprises the following steps:
the method comprises the following steps: adding raw materials, filling a water source into an emulsification tank (1), reacting a proper amount of compound containing active hydrogen with excessive diisocyanate to synthesize a prepolymer with medium molecular weight, and adding the prepolymer into the emulsification tank (1);
step two: stirring and emulsifying, namely driving the upper through pipe (3) and the stirring component to rotate at a high speed through the driving component (9) to emulsify and disperse the raw materials;
step three: adding an emulsifier, and adding diamine hydrophilic monomer serving as an internal emulsifier into an emulsifying tank (1) to generate aqueous polyurethane-urea with high relative molecular weight;
step four: and (3) controlling the temperature, namely introducing cooling liquid into the spiral pipe (501) and the stirring rod (7) by using the circulating cooling assembly (5), and controlling the emulsifying temperature to be not higher than the critical point temperature of the reaction between water and the-NCO group, thereby finally obtaining the waterborne polyurethane dispersion liquid.
2. The preparation process of the water-based resin as claimed in claim 1, wherein the driving assembly (9) comprises a driving motor (901), a chain wheel (902) and a chain belt (903), the driving motor (901) is fixedly arranged on the cover body (2), the chain wheel (902) is fixedly sleeved on the outer sides of the output shaft of the driving motor (901) and the upper through pipe (3), and the two chain wheels (902) are connected through the chain belt (903).
3. The preparation process of the water-based resin according to claim 1, wherein the upper connecting pipe (504) and the lower connecting pipe (505) are provided with rotating hole seats (507), the upper through pipe (3) and the lower through pipe (4) are respectively matched and rotatably mounted in the corresponding rotating hole seats (507), the upper through pipe (3) and the lower through pipe (4) are respectively penetrated with water passing grooves (508) arranged at equal intervals, and the upper through pipe (3) and the lower through pipe (4) are respectively communicated with the upper connecting pipe (504) and the lower connecting pipe (505) through the water passing grooves (508).
4. The process for preparing the water-based resin as claimed in claim 1, wherein the outside of the spiral pipe (501) is wrapped with a thermal insulation layer (509).
5. The preparation process of the water-based resin according to claim 1, wherein a plurality of support legs (102) are fixedly connected to the bottom of the emulsification tank (1) and are arranged at equal intervals, and the support legs (102) are arranged to extend outwards.
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| CN116282679B (en) * | 2023-02-23 | 2023-08-29 | 安徽瑞柏新材料有限公司 | Multistage filtration's methyl acetate waste water treatment device for production |
| CN117901330A (en) * | 2024-03-19 | 2024-04-19 | 优佰特(山东)新材料技术有限公司 | Production device and method of polyurethane material product |
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|---|---|---|---|---|
| CN101885830B (en) * | 2010-06-24 | 2012-01-25 | 同济大学 | Synthesis method of waterborne polyurethane emulsion |
| DE102013006816B4 (en) * | 2013-04-19 | 2017-04-13 | Gerd Lukoschus | Change in the arrangement of stirring bars in agitators and mixers |
| CN207614667U (en) * | 2017-10-12 | 2018-07-17 | 天津市新丽华色材有限责任公司 | A kind of emulsifier unit for electrophoretic coating |
| CN209362425U (en) * | 2018-11-26 | 2019-09-10 | 福建赛雀新材料科技有限公司 | A kind of mixing drum cooling water circulating device |
| CN110368825A (en) * | 2019-07-30 | 2019-10-25 | 陈宁 | A kind of sealing glue production method |
| CN213254294U (en) * | 2020-09-10 | 2021-05-25 | 济宁正东化工有限公司 | Graphite cooler convenient to back flush blowdown |
| CN215742867U (en) * | 2021-08-17 | 2022-02-08 | 山东首丰智能环保装备有限公司 | Mixing device for SCR flue gas denitration system |
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