A production process for butadiene-styrene-pyridine latex

Abstract

The present invention relates to the technical field of butadiene styrene latex processing, and in particular, to a process for producing butadiene styrene latex. The process comprises the following steps: S1, adding butadiene styrene latex material into a reactor, followed by heating and stirring the material; S2, arranging a spray assembly and a scraper inside the reactor, the spray assembly and the scraper rotating synchronously with a stirring shaft in the reactor; and the spray assembly spraying the material inside the reactor toward the inner wall of the reactor; S3, when the spray assembly stops spraying the material toward the inner wall of the reactor, driving the scraper to contact the inner wall of the reactor; in the process for producing butadiene styrene latex, the scraper only contacts the inner wall of the reciprocating drive mechanism for half a circle, and the other half circle drives the spray assembly through the reciprocating motion of the piston to impact the attached material, which not only reduces the wear rate of the scraper, but also solves the problem that the piston cannot impact the attached material when resetting.

Description

Technical Field

[0001] The invention relates to the technical field of styrene-butadiene pyridine latex processing, in particular to a production process for styrene-butadiene pyridine latex. Background Art

[0002] The manufacturing process for styrene-butadiene latex is similar to that of styrene-butadiene latex, except that vinyl pyridine replaces part of the styrene. The polymerization methods are divided into two categories: hot polymerization and cold polymerization. Currently, hot polymerization is generally used at a temperature of 50°C. The ratio of butadiene:styrene:2-vinyl pyridine is 70:15:15. The introduction of pyridine groups into the latex increases its polarity, significantly improving the direct adhesion between fibers (especially rayon, polyamide, polyester, etc.) and rubber.

[0003] At present, the thermal polymerization of styrene-butadiene latex is carried out in a polymerization reactor. In order to prevent the material from adhering to the inner wall of the reactor, the following two methods are usually used:

[0004] The first method involves scraping the material off with a scraper. For example, Chinese Patent Publication No. CN118874387B discloses a reactor for styrene-butadiene latex. This patent uses a scraper to scrape the material off the inner wall of the reactor. However, this method accelerates the wear of the scraper due to the constant contact and friction between the scraper and the inner wall of the reactor.

[0005] The second method is to impact the inner wall of the reactor. Most of the time, this is done by using a piston. The extrusion force during the piston movement sprays liquid onto the inner wall of the reactor, thereby flushing the material attached to the inner wall of the reactor. However, since the piston moves back and forth, it cannot continue to spray liquid onto the inner wall of the reactor during the reset process, which affects the efficiency of cleaning the attached material. Summary of the Invention

[0006] The object of the present invention is to provide a process for producing butadiene-styrene latex, which realizes the alternating operation of the scraper and the liquid spray through the combination of a piston and a scraper, thereby solving the problems raised in the above-mentioned background technology, namely, the scraper is always in contact and friction with the inner wall of the kettle body and the piston cannot continue to flush down the material attached to the inner wall of the kettle body during the resetting process.

[0007] To achieve the above object, the invention provides a process for producing butadiene-styrene-pyridine latex, comprising the following steps:

[0008] S1, adding the material of styrene-butadiene pyridine latex into a reactor, then heating and stirring the material;

[0009] S2. A spray assembly and a scraper are arranged inside the reactor, and the spray assembly and the scraper rotate synchronously with the stirring shaft inside the reactor; and the spray assembly sprays the material inside the reactor toward the inner wall of the reactor;

[0010] S3, when the spraying assembly stops spraying material toward the inner wall of the reactor, the scraper is driven to contact the inner wall of the reactor;

[0011] Among them, the reactor includes a kettle body and a stirring shaft rotatably arranged in the kettle body and connected to a stirring blade; a reciprocating drive mechanism is arranged inside the kettle body, and the injection assembly and the scraper are connected to the reciprocating drive mechanism; the reciprocating drive mechanism is connected to the stirring shaft to drive the injection assembly and the scraper to rotate around the inner wall of the kettle body through the stirring shaft; the reciprocating drive mechanism is used to drive the injection assembly and the scraper in an alternating drive manner; the injection assembly sprays the material in the kettle body onto the inner wall of the kettle body under the drive of the reciprocating drive mechanism; the scraper contacts the inner wall of the kettle body under the drive of the reciprocating drive mechanism.

[0012] In the above technical solution, the scraper only contacts the inner wall of the kettle when the reciprocating drive mechanism is reset. When the scraper is not in contact with the inner wall of the kettle, the reciprocating drive mechanism drives the spray assembly to spray the material onto the inner wall of the kettle. In this way, the scraper and the spray assembly can work alternately.

[0013] On this basis, the reciprocating drive mechanism includes a driving member and a passive member. The passive member includes a piston tube fixedly connected to the agitator shaft, and a piston plate slidably disposed within the piston tube. The piston plate is fixedly connected to a driven rod that slides through the top of the piston tube. The driving member drives the piston plate to reciprocate via the driven rod. Here, the structure of the passive member is specifically illustrated. As can be seen from the above, the passive member is a piston structure. In this way, the upward movement of the piston plate drives the scraper, and the downward movement of the piston plate drives the spray assembly.

[0014] The driving member includes a driving ring located within the kettle body, the outer ring of which is provided with a wave-shaped driving groove. The top end of the driven rod extends into the driving groove. When the driven rod rotates around the driving ring, it drives the piston plate up and down under the guidance of the driving groove.

[0015] The spray assembly is a nozzle with one end connected to the bottom of the piston plate and the other end facing the side wall of the kettle body. The nozzle faces the side wall of the kettle body. When the material is sprayed through the nozzle, the material will immediately impact the material attached to the side wall of the kettle body.

[0016] One side of the piston tube is connected to a connecting tube, one end of which is connected to the piston plate, and the other end of which is slidably provided with a piston rod, one end of which is fixedly connected to the scraper. With this design, when the piston plate moves up and down, the pressure in the piston tube also changes accordingly. This pressure change causes the piston rod to drive the scraper to move, thereby contacting or separating from the side wall of the kettle body.

[0017] In another technical solution, one side of the piston tube is connected to a feed pipe, the feed pipe is connected above the piston plate, and a one-way valve is provided inside the feed pipe, one end of which extends into the interior of the kettle body; the nozzle is inclined toward the scraper, and one end of the scraper is inclined toward the nozzle.

[0018] In this technical solution, after the material is ejected through the nozzle, it will be guided by the scraper around the feed pipe and then sucked into the feed pipe to be mixed again, preventing the material from staying on the side wall of the kettle.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The invention is used in the production process of styrene-butadiene latex, and utilizes the reciprocating motion of the piston to drive the scraper and the injection assembly to operate alternately. Thus, during a single rotation, the scraper will only contact half of the inner wall of the reciprocating drive mechanism, and the other half of the piston drives the injection assembly to impact the attached material through the reciprocating motion of the piston. This not only reduces the wear rate of the scraper, but also solves the problem that the piston cannot impact the attached material when it is reset.

[0021] 2. When used in the production process of styrene-butadiene latex, the scraper can not only scrape off the material attached to the inner wall of the kettle, but also guide the attached material to the feed pipe, and then cooperate with the reciprocating motion of the piston plate to perform secondary mixing on the attached material, thereby improving the mixing efficiency of the material attached to the inner wall of the kettle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the scraper of the present invention;

[0024] Figure 3 It is a schematic diagram of the internal structure of the kettle body of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the reciprocating drive mechanism of the present invention;

[0026] Figure 5 For the present invention Figure 4 A magnified schematic diagram of the structure at A;

[0027] Figure 6 The structure of the connecting pipe of the present invention is shown in FIG. Figure 1 ;

[0028] Figure 7 Schematic diagram of the structure of the connecting pipe of the present invention Figure 2 ;

[0029] Figure 8 This is a schematic diagram of the cleaning state of the inner wall of the kettle body of the present invention;

[0030] Figure 9 It is a structural schematic diagram of the nozzle of the present invention.

[0031] The meaning of each number in the figure is:

[0032] 100. Kettle body; 101. Kettle cover; 102. Discharge port; 103. Stirring shaft; 104. Stirring blade; 105. Drive motor; 106. Casing; 110. Reciprocating drive mechanism; 111. Piston tube; 112. Partition; 113. Piston chamber; 114. Piston plate; 115. Lower piston chamber; 116. Upper piston chamber; 117. Through port; 118. Diversion port; 120. Nozzle; 130. Scraper; 131. Connecting pipe; 132. Piston rod; 140. Driven rod; 141. Drive ring; 142. Drive groove; 143. Sleeve; 150. Connecting rod; 160. Feed pipe; 161. Valve ball. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0036] In order to solve the problem that the scraper 130 is always in contact and friction with the inner wall of the kettle body 100 and the piston cannot continue to flush the material attached to the inner wall of the kettle body 100 during the reset process, the present invention provides a process for producing styrene-butadiene latex, comprising the following method steps:

[0037] S1, the material of styrene-butadiene pyridine latex is added into a reactor, then the reactor is heated and the material is stirred simultaneously;

[0038] S2. A spray assembly and a scraper 130 are arranged inside the reactor. The spray assembly and the scraper 130 rotate synchronously with the stirring shaft 103 inside the reactor. The spray assembly sprays the material inside the reactor toward the inner wall of the reactor.

[0039] S3. When the spraying assembly stops spraying the material toward the inner wall of the reactor, the scraper 130 is driven to contact the inner wall of the reactor.

[0040] Among them, Figure 1 As shown, the reactor includes a reactor body 100 and a reactor cover 101. A feeding port for feeding materials is provided on the top of the reactor cover 101, and correspondingly, a discharge port 102 is provided on the bottom of the reactor body 100 to control the discharge of materials; at the same time, a stirring device is provided inside the reactor body 100. The stirring device includes a stirring shaft 103 that passes through the reactor cover 101 longitudinally, the top end of the stirring shaft 103 is connected to the drive motor 105 provided on the top of the reactor cover 101, and the bottom end is connected to the stirring blade 104. In order to improve the stirring efficiency, multiple groups of stirring blades 104 can be provided, and the shape of the stirring blade 104 can be flexibly selected according to the use environment. This embodiment does not limit the stirring device.

[0041] Since the kettle 100 needs to be heated during the production of butadiene styrene latex, the heating method of this embodiment is preferably a heat conduction type. Figure 1 As shown, the outer shell 106 is sleeved around the outer ring of the kettle body 100, forming a heat exchange chamber between the outer ring of the kettle body 100. The top of the heat exchange chamber is connected to the oil inlet, and the bottom is connected to the oil outlet. In this way, hot oil enters the heat exchange chamber through the oil inlet to heat the kettle body 100, and is then discharged through the oil outlet, thus completing the circulation.

[0042] like Figure 2 As shown, a reciprocating drive mechanism 110 is provided inside the kettle body 100; the injection assembly and the scraper 130 are connected to the reciprocating drive mechanism 110; the reciprocating drive mechanism 110 is connected to the stirring shaft 103, so as to drive the injection assembly and the scraper 130 to rotate around the inner wall of the kettle body 100 through the stirring shaft 103; the reciprocating drive mechanism 110 is used to drive the injection assembly and the scraper 130 in an alternating driving manner; wherein, the injection assembly is driven by the reciprocating drive mechanism 110 to inject the material in the kettle body 100 onto the inner wall of the kettle body 100; the scraper 130 is driven by the reciprocating drive mechanism 110 to contact the inner wall of the kettle body 100.

[0043] Specifically, the reciprocating drive mechanism 110 includes a driving member and a passive member, wherein Figure 5As shown, the passive part includes a piston tube 111 located in the kettle body 100, and a piston plate 114 slidably arranged inside the piston tube 111. The upper and lower ends of the piston tube 111 are connected to connecting rods 150, and one end of the connecting rod 150 is fixedly connected to the stirring shaft 103. In this way, the piston tube 111 can rotate synchronously with the stirring shaft 103 through the connecting rod 150;

[0044] The piston tube 111 is vertically arranged as a whole, and the upper and lower ends are sealed. Figure 4 As shown, given the overall length of piston tube 111, it's difficult to drive a single piston plate 114 to the top or bottom of piston tube 111 within the limited space (the space inside kettle body 100). To this end, this embodiment divides piston tube 111 into sections. Specifically, multiple transverse partitions 112 are provided within piston tube 111, dividing the interior of piston tube 111 into multiple piston chambers 113. A piston plate 114 is then positioned within each piston chamber 113. This allows piston plate 114 to reciprocate only within the piston chamber 113.

[0045] Next, in order to drive the multiple piston plates 114 to move up and down, the multiple piston plates 114 are commonly connected to a vertically arranged follower rod 140, and the top end of the follower rod 140 slides through the top of the piston tube 111. In this way, the driving member can drive the piston plate 114 to reciprocate in the piston chamber 113 through the follower rod 140.

[0046] It should be understood that the piston plate 114 divides the piston cavity 113 into a lower piston chamber 115 and an upper piston chamber 116, wherein the lower piston chamber 115 is located below the piston plate 114 and the upper piston chamber 116 is located above the piston plate 114; it contacts the inner wall of the kettle body 100; the lower piston chamber 115 is connected to the injection assembly, which is used to spray the material in the kettle body 100 to the inner wall of the kettle body 100 through the injection assembly when the lower piston chamber 115 moves downward; the upper piston chamber 116 is connected to the scraper 130 by a piston member, and the piston member is used to drive the scraper 130 to contact the inner wall of the kettle body 100 when the piston plate 114 moves upward.

[0047] In some embodiments, the driving element is a spiral groove provided on the outer ring of the driven rod 140. There are two spiral grooves, each with the same pitch and opposite rotation directions, connected at both ends by a transition curve (for details, see reciprocating screw). Simultaneously, the piston plate 114 is threadedly connected to the driven rod 140. Then, by installing a motor at the top of the reciprocating drive mechanism 110, the motor drives the driven rod 140 to rotate. The rotation of the driven rod 140 drives the piston plate 114 to reciprocate up and down through the spiral groove.

[0048] It should be understood that one spiral groove may also be provided, in which case the up and down reciprocating motion of the piston plate 114 is achieved by controlling the forward and reverse rotation of the motor.

[0049] In other embodiments, Figure 3 As shown, the driving member includes a driving ring 141 located in the kettle body 100, and the outer ring of the driving ring 141 is provided with a driving groove 142, and the driving groove 142 is specifically a wave-shaped structure. In this way, by extending the top end of the driven rod 140 into the driving groove 142, when the driven rod 140 starts to rotate, the driven rod 140 starts to reciprocate up and down under the guidance of the driving groove 142, and then drives the piston plate 114 to reciprocate up and down. At the same time, the inner ring of the driving ring 141 is fixedly connected to a sleeve 143 sleeved on the outer ring of the stirring shaft 103, and the sleeve 143 is rotatably connected to the stirring shaft 103, and the top end of the sleeve 143 penetrates Figure 1 The kettle cover 101 is connected to the motor. For the principle, please refer to the working principle section below.

[0050] Figure 5 The specific structure of the injection assembly is shown in FIG. Figure 5 As shown, the injection assembly is a nozzle 120 with one end connected to the lower piston chamber 115 and the other end facing the side wall of the kettle body 100. In addition, the end of the nozzle 120 facing the side wall of the kettle body 100 is a flat end, and the discharge flow rate of the flat end corresponds to the discharge flow rate of the other end. In this way, after the material in the lower piston chamber 115 enters the nozzle 120, the material is discharged through the flat end.

[0051] Figure 6 The specific structure of the piston is shown in FIG. Figure 6 As shown, the piston member includes a connecting pipe 131, one end of which is connected to the upper piston chamber 116 (specifically, via Figure 5 and Figure 6 The other end of the piston rod 132 is provided with a sliding motion inside, and one end of the piston rod 132 is fixedly connected to the scraper 130. Specifically,

[0052] During implementation, a diversion port 118 connected to the upper piston chamber 116 is provided on the side wall of the piston tube 111, and one end of the connecting tube 131 is connected to the diversion port 118, and the other end is bent toward the scraper 130. Then, protrusions are provided on both sides of the piston rod 132 inside the connecting tube 131, and the protrusions are used to limit the displacement distance of the piston rod 132 to prevent the piston rod 132 from separating from the connecting tube 131. The piston rod 132 is in a "T"-shaped structure as a whole, with the thicker end fitting the inner wall of the connecting tube 131, and the thinner end passing through the end of the connecting tube 131 and fixedly connected to the scraper 130. In addition, there is no need to set a large number of piston parts, and the number can be as follows: Figure 7 Just as shown.

[0053] And, as Figure 5As shown, the upper piston chamber 116 needs to be connected to the outside world so as not to affect the reciprocating motion of the piston plate 114. Therefore, the side wall of the piston tube 111 is further provided with a through port 117 that communicates with the upper piston chamber 116. The aperture of the through port 117 is smaller than the aperture of the diverter port 118, so that positive or negative pressure can be generated in the connecting tube 131 during the reciprocating motion of the piston plate 114.

[0054] That is to say, the reciprocating motion of the piston is used to drive the scraper 130 and the injection assembly to operate alternately, so that during a single rotation, the scraper 130 will only contact half of the inner wall of the reciprocating drive mechanism 110, and the other half of the reciprocating motion of the piston drives the injection assembly to impact the attached material, which not only reduces the wear rate of the scraper 130, but also solves the problem of being unable to impact the attached material when the piston is reset.

[0055] Working principle:

[0056] refer to Figure 5 and Figure 6 The stirring shaft 103 drives the piston tube 111 to rotate through the connecting rod 150, and the driven rod 140 located on the piston tube 111 also rotates accordingly. During the rotation process, the driven rod 140 is driven by the driving groove 142 to move up and down. At this time, the driven rod 140 drives the piston plate 114 to move up and down. When the piston plate 114 moves upward, negative pressure is generated inside the lower piston chamber 115, thereby sucking the material in the kettle body 100 into the lower piston chamber 115 through the flat end of the nozzle 120 (refer to Figure 5 At the same time, the upward movement of the piston plate 114 will cause positive pressure to be generated in the upper piston chamber 116, thereby squeezing the material in the upper piston chamber 116 through the through-port 117 and the diverter port 118. Since the aperture of the through-port 117 is smaller than the diverter port 118, most of the material will enter the diverter port 118 and then flow into the connecting pipe 131 to drive the piston rod 132 to move. The displacement of the piston rod 132 drives one end of the scraper 130 to contact the side wall of the kettle body 100. At this time, the scraper 130 scrapes off the material attached to the side wall of the kettle body 100.

[0057] When the piston plate 114 moves downward, negative pressure is generated in the upper piston chamber 116. At this time, the piston rod 132 is sucked and drives the scraper 130 to move, so that the scraper 130 is separated from the inner wall of the kettle body 100. At the same time, positive pressure is generated in the lower piston chamber 115, forcing the liquid in the lower piston chamber 115 to be squeezed out through the nozzle 120 (refer to Figure 5 The squeezed liquid, as indicated by the black arrow in the nozzle 120, flushes the material originally attached to the inner wall of the kettle body 100 through its own impact force. This cycle is then repeated.

[0058] Combined with the above content, refer to Figure 6 and Figure 8 As shown, the location where the liquid is ejected through the nozzle 120 is area a (the shaded area), and the location where the scraper 130 scrapes the material is area b (the dotted area). It can be understood that during one rotation, the scraper 130 only contacts half of the inner wall of the kettle body 100.

[0059] Then, the motor drives the sleeve 143 to rotate, and the sleeve 143 drives the driving ring 141 to rotate. After the driving ring 141 rotates, the position of the driven rod 140 moving up and down will change, so as to realize the cleaning of the material attached to the inner wall of the kettle body 100. For easy understanding, refer to Figure 8 As shown, when the drive ring 141 does not rotate, the positions of area a and area b are Figure 8 As shown, when the driving ring 141 rotates, the position of the reciprocating motion of the driven rod 140 changes, and the positions of the area a and the area b also change accordingly. In this way, the material at the junction of the area a and the area b can be cleaned.

[0060] In addition, when the materials attached to the inner wall of the kettle body 100 are scraped off, they are usually still around the inner wall of the kettle body 100, making it difficult to fully mix them. Figure 5 As shown, a feed pipe 160 communicating with the lower piston chamber 115 is provided on one side of the piston tube 111. A one-way valve is provided inside the feed pipe 160, and one end of the feed pipe 160 extends into the interior of the kettle body 100. Figure 9 As shown, the nozzle 120 is inclined toward the scraper 130, and at the same time, one end of the scraper 130 is also inclined toward the nozzle 120, forming a "V"-shaped structure with an opening therebetween.

[0061] Specifically, one end of the feed pipe 160 is bent toward the bottom, and the one-way valve is a valve ball 161 arranged inside the bottom end of the feed pipe 160 . The aperture of the bottom end of the feed pipe 160 is smaller than the outer diameter of the valve ball 161 so that the material can only enter the feed pipe 160 .

[0062] In this way, the material is ejected through the nozzle 120 and washes down the material attached to the inner wall of the kettle body 100. At the same time, due to the inclination of the nozzle 120, the material will be rushed to the scraper 130. Then, as the scraper 130 moves, the scraper 130 collides with the material being rushed down during the movement and guides the material being rushed down to the end of the feed pipe 160 through its own inclined surface (the trajectory of the material being rushed down is referenced). Figure 9 ). Then refer to Figure 5As shown, when the piston plate 114 moves upward, negative pressure is generated in the lower piston chamber 115. At this time, the material being flushed down will be sucked into the piston plate 114 through the feed pipe 160 and the nozzle 120 (refer to the white arrow in the feed pipe 160 and the white arrow in the nozzle 120). In this process, since the flushed material is guided to the feed pipe 160 by the scraper 130, the feed pipe 160 will suck the flushed material into the lower piston chamber 115, and the other part of the material will enter the lower piston chamber 115 through the nozzle 120. When the piston plate 114 moves downward, the two parts of the material are extruded through the nozzle 120 and mixed during the extrusion process.

[0063] In this way, two areas are formed inside the kettle body 100, such as Figure 9 As shown, the inner circle of the dashed line represents region c, while the outer circle represents region d. Region c is near the center of the kettle 100 and is stirred and mixed by the stirring blades 104. Region d is near the outer rim of the kettle 100, making it difficult for the stirring blades 104 to fully mix this area (particularly the area near the inner wall of the kettle 100). Guided by the scraper 130, material adhering to the inner rim of the kettle 100, when being flushed or scraped off, flows to the feed pipe 160 and is then drawn through the feed pipe 160 into the lower piston chamber 115, where it mixes with the material drawn in by the nozzle 120. This results in region c forming the primary mixing region and region d forming the secondary mixing region.

[0064] In summary, the scraper 130 can not only scrape off the material attached to the inner wall of the kettle body 100, but also guide the attached material to the feed pipe 160, and then cooperate with the reciprocating motion of the piston plate 114 to perform secondary mixing on the attached material, thereby improving the mixing efficiency of the material attached to the inner wall of the kettle body 100.

[0065] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A production process for butadiene-styrene-pyridine latex, characterized in that: The method comprises the following steps: S1, adding the raw materials of styrene-butadiene rubber latex into a reactor, and then heating and stirring the raw materials; S2. A spray assembly and a scraper (130) are provided inside the reactor, wherein the spray assembly and the scraper (130) rotate synchronously with the stirring shaft (103) inside the reactor; and the spray assembly sprays the material inside the reactor toward the inner wall of the reactor; S3, when the spraying assembly stops spraying the material toward the inner wall of the reactor, the scraper (130) is driven to contact the inner wall of the reactor; The reactor comprises a reactor body (100) and a stirring shaft (103) rotatably arranged in the reactor body (100) and connected to a stirring blade (104); a reciprocating drive mechanism (110) is arranged inside the reactor body (100), and the spray assembly and the scraper (130) are connected to the reciprocating drive mechanism (110); The reciprocating drive mechanism (110) is connected to the stirring shaft (103) to drive the spray assembly and the scraper (130) to rotate around the inner wall of the kettle body (100) through the stirring shaft (103); the reciprocating drive mechanism (110) is used to drive the spray assembly and the scraper (130) in an alternating driving manner; The spray assembly sprays the material in the kettle (100) onto the inner wall of the kettle (100) under the drive of the reciprocating drive mechanism (110); The scraper (130) contacts the inner wall of the kettle body (100) under the drive of the reciprocating drive mechanism (110); The reciprocating drive mechanism (110) includes a driving member and a passive member, the passive member including a piston tube (111) fixedly connected to the stirring shaft (103), and a piston plate (114) slidably arranged inside the piston tube (111), the piston plate (114) being fixedly connected to a driven rod (140) that slides through the top of the piston tube (111); The driving member drives the piston plate (114) to reciprocate via the driven rod (140); The injection assembly is a nozzle (120) with one end connected to the bottom of the piston plate (114) and the other end facing the side wall of the kettle body (100); The driving member comprises a driving ring (141) located in the kettle body (100), and the outer ring of the driving ring (141) is provided with a driving groove (142) with a wave-shaped structure; The top end of the driven rod (140) extends into the driving slot (142); The piston plate (114) is threadedly connected to the driven rod (140), and during the rotation of the driven rod (140), the piston plate (114) is driven to reciprocate up and down through the driving groove (142); One side of the piston tube (111) is connected to a connecting tube (131), one end of the connecting tube (131) is connected to the top of the piston plate (114), and a piston rod (132) is slidably provided inside the other end, and one end of the piston rod (132) is fixedly connected to the scraper (130).

2. The production process for butadiene-styrene-pyridine latex according to claim 1, wherein: The piston tube (111) is divided into a plurality of piston chambers (113) by arranging a plurality of partition plates (112) in the piston tube (111). A piston plate (114) is arranged in each piston chamber (113), and the plurality of piston plates (114) are commonly connected to a driven rod (140). The piston plate (114) divides the piston chamber (113) into a lower piston chamber (115) and an upper piston chamber (116).

3. The production process for butadiene-styrene-pyridine latex according to claim 1, wherein: One end of the nozzle (120) facing the side wall of the kettle body (100) is a flat end, and the discharge flow rate of the flat end corresponds to the discharge flow rate of the other end.

4. The production process for butadiene-styrene-pyridine latex according to claim 1, wherein: The side wall of the piston tube (111) is further provided with a through opening (117) located above the piston plate (114), and the aperture of the through opening (117) is smaller than the aperture of the connection point between the connecting tube (131) and the piston tube (111).

5. The production process for butadiene-styrene-pyridine latex according to claim 1, wherein: One side of the piston tube (111) is connected to a feed pipe (160), the feed pipe (160) is connected to the top of the piston plate (114), a one-way valve is provided inside the feed pipe (160), and one end of the feed pipe (160) extends into the interior of the kettle body (100); The nozzle (120) is inclined toward the scraper (130), and one end of the scraper (130) is inclined toward the nozzle (120).

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