Paste resin for producing PVC gloves and preparation method thereof

Abstract

The invention discloses paste resin for producing PVC (polyvinyl chloride) gloves, which is prepared from the following materials in parts by mass: 100 to 120 parts of vinyl chloride, 3 to 5 parts of sodium dodecyl benzene sulfonate, 2 to 7 parts of octylphenol polyoxyethylene ether, 0.5 to 0.7 part of benzoyl peroxide, 0.3 to 0.5 part of ammonium persulfate, 0.3 to 0.5 part of dicumyl peroxide and 20 to 25 parts of antibacterial agent modified compound, and relates to the technical field of paste resin. According to the paste resin for producing the PVC gloves and the preparation method of the paste resin, the antibacterial agent modified compound is added, so that phosphorus-containing groups can form a stable phosphorus-oxygen structure in a high-temperature environment, the gloves can bear higher temperature without obvious deformation, softening and the like, and the high-temperature resistance of the gloves is remarkably enhanced. In addition, the cationic characteristic of the quaternary ammonium salt antibacterial agent enables the quaternary ammonium salt antibacterial agent to destroy the cell membrane structure of bacteria. In the use process of the PVC glove, the antibacterial property can effectively inhibit the breeding and reproduction of bacteria, the risk of bacterial propagation can be reduced, and the use safety and sanitation are improved.

Description

Technical Field

[0001] The invention relates to the technical field of paste resins, in particular to a paste resin for producing PVC gloves and a preparation method thereof. Background Art

[0002] Paste resin is a special type of polyvinyl chloride (PVC) resin. It is a white fine powder, the main component of which is polyvinyl chloride polymer. Compared with ordinary PVC resin, paste resin has finer particles and usually has a higher degree of polymerization. In addition to vinyl chloride monomer, its composition also contains emulsifiers, initiators, cross-linking agents and other additives that remain after the polymerization reaction. These additives play a key role in the formation process of the resin, such as emulsifiers are used to stabilize the polymerization system, initiators initiate polymerization reactions, and cross-linking agents enhance the physical properties of the resin.

[0003] Paste resin for PVC gloves is the key raw material for the production of PVC gloves. It is a special polyvinyl chloride (PVC) resin named for its ability to form a uniform paste. This paste resin is prepared through a specific polymerization process, and its formula and performance are optimized for the production and use requirements of PVC gloves.

[0004] During high-temperature disinfection processes or in specific industrial high-temperature operation scenarios, ordinary PVC gloves may deform and age, and they cannot effectively resist bacteria in environments where bacteria are easily grown. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a paste resin for producing PVC gloves and a preparation method thereof, which solves the above-mentioned problems.

[0006] To achieve the above object, the present invention is implemented by the following technical scheme: a paste resin for producing PVC gloves, composed of the following materials by weight: 100-120 parts of vinyl chloride, 3-5 parts of sodium dodecylbenzene sulfonate, 2-7 parts of octylphenol polyoxyethylene ether, 0.5-0.7 parts of benzoyl peroxide, 0.3-0.5 parts of ammonium persulfate, 0.3-0.5 parts of dicumyl peroxide and 20-25 parts of antibacterial agent modified compound; The antibacterial agent modified compound is composed of the following raw materials in parts by weight: 20-30 parts of nano titanium dioxide, 3-5 parts of gamma-aminopropyltriethoxysilane, 15-20 parts of potassium dihydrogen phosphate, 4-6 parts of toluene and 10-12 parts of hexadecyltrimethylammonium bromide.

[0007] The antimicrobial agent modified composite is prepared by the following steps: A1. Add nano-titanium dioxide and anhydrous ethanol solution to a three-necked flask equipped with a stirrer, a thermometer and a reflux condenser, start stirring to evenly disperse the nano-titanium dioxide in the anhydrous ethanol, and then slowly drop γ-aminopropyltriethoxysilane; after the reaction is completed, transfer the reaction mixture to a centrifuge tube, centrifuge at a speed of 8000-10000 rpm for 15-20 minutes, and collect the precipitate; A2, washing the precipitate with anhydrous ethanol for 3-5 times to remove the unreacted silane coupling agent, and then placing the precipitate in a vacuum drying oven and drying it at 60-80° C. for 12-24 hours to obtain grafted nano-titanium dioxide; A3. Prepare a specific buffer solution with a pH of 5, add all the grafted nano-titanium dioxide obtained by the first modification into the buffer solution, start stirring to evenly disperse the grafted nano-titanium dioxide; then add potassium dihydrogen phosphate, raise the temperature to 80°C, and react for 4 hours under stirring; A4. After the reaction is completed, centrifuge the mixture to collect the precipitate. Wash the precipitate with deionized water for 4-6 times to remove the residual potassium dihydrogen phosphate. Then, place the precipitate in a vacuum drying oven and dry it at 70-90° C. for 18-30 hours to obtain phosphorus-modified nano titanium dioxide. A5. Add the phosphorus-modified nano-titanium dioxide after the second modification into the toluene solution, and react in a three-necked flask with a stirrer, a thermometer and a reflux condenser; start stirring to evenly disperse the phosphorus-modified nano-titanium dioxide in toluene, and then add hexadecyltrimethylammonium bromide; A6. After the reaction is completed, first perform hot filtration to remove impurities in the solution, then cool the filtrate to room temperature, centrifuge again, and collect the precipitate; wash the precipitate with toluene 2-3 times, and finally place the precipitate in a vacuum drying oven and dry it at 80-100°C for 24-48 hours to obtain the final antibacterial agent modified composite.

[0008] Preferably, the dripping speed in A1 is controlled to be 1-2 ml / min. After the dripping is completed, the temperature is raised to 60° C. and the reaction is continuously stirred for 6 hours under constant temperature conditions.

[0009] Preferably, the centrifugation operation in A4 is performed at a speed of 9000-11000 rpm for 20-30 minutes.

[0010] Preferably, the three-necked flask in A5 is heated to the reflux temperature of toluene, 110-115° C., and stirred for reaction under reflux conditions for 8 hours.

[0011] Preferably, the A6 centrifuge is performed at a speed of 10,000-12,000 rpm for 30-40 minutes.

[0012] A method for preparing a paste resin for producing PVC gloves comprises the following steps: B1. Mix the raw materials, add vinyl chloride monomer, sodium dodecylbenzene sulfonate, octylphenol polyoxyethylene ether, benzoyl peroxide, ammonium persulfate, dicumyl peroxide and antibacterial agent modified compound into deionized water to form a uniform emulsion system. Control the temperature in the reactor at 30-50℃; the temperature can be controlled by circulating water in the jacket to ensure that the raw materials are fully dissolved and dispersed, and prevent premature initiation of polymerization.

[0013] B2. Polymerization reaction: under stirring and constant temperature conditions, introduce inert gas nitrogen into the reactor to remove oxygen from the reaction system; then slowly raise the temperature to the polymerization reaction temperature of 50-70°C, and control the heating rate at 0.5-1°C / minute; the polymerization reaction is carried out at a pressure of 0.4-0.6MPa, and the reaction time is 4-8 hours; during the polymerization process, the amount and speed of initiator addition are accurately adjusted by a peristaltic pump, and the initiator is replenished every 30-60 minutes, and each replenishment is 5%-10% of the total amount of initiator; accurately control the polymerization reaction rate to ensure smooth progress of the reaction and avoid abnormal conditions such as violent polymerization.

[0014] B3, drying, after the polymerization reaction is completed, the polymer emulsion is dried by spray drying; the polymer emulsion is transported to the nozzle of the spray drying tower at a speed of 10-20 ml / min by a peristaltic pump, and the nozzle adopts a pressure nozzle with a pressure of 0.2-0.4 MPa, so that the emulsion is atomized into tiny droplets, and the water is quickly evaporated under the action of hot air to obtain PVC paste resin particles; B4. Crushing and packaging: The dried PVC paste resin particles are crushed by a jet mill; the working pressure of the mill is adjusted to 0.6-0.8MPa to make the particle size reach 0.1-10 microns; then the crushed paste resin is packaged in a moisture-proof and well-sealed aluminum foil composite packaging bag.

[0015] Preferably, the polymerization reaction kettle in B1 is stirred at a speed of 300-500 rpm for 30-60 minutes to fully mix the raw materials.

[0016] Preferably, the nitrogen flow rate in B2 is controlled at 20-30 ml / min, and the ventilation time is 15-30 minutes.

[0017] Preferably, the air inlet temperature of the B3 spray drying equipment is set at 150-200°C, and the air outlet temperature is controlled at 70-90°C.

[0018] The present invention provides a paste resin for producing PVC gloves and a preparation method thereof. The paste resin has the following beneficial effects: After PVC paste resin is mixed with additives such as plasticizers, the gloves made can have good flexibility, be more comfortable to wear, fit the curve of the hand, do not hinder the normal movement of the hand, and allow users to be more flexible during operation. It can make PVC gloves have sufficient strength and not easy to break during normal use, extending the service life of the gloves.

[0019] PVC paste resin has strong chemical corrosion resistance, and the gloves produced can resist the erosion of a variety of chemical substances; it has good chemical stability and is not easy to react chemically with other substances. It can maintain stable performance under different environmental conditions, ensuring that the gloves can consistently play a protective role during long-term use.

[0020] The gloves do not contain allergens, are powder-free and have no skin irritation or allergic reactions. They are friendly to the user's skin, reduce the risk of skin allergies and other problems caused by wearing gloves, and improve safety and comfort of use.

[0021] The addition of antimicrobial modified compounds enables phosphorus-containing groups to form a stable phosphorus-oxygen structure in a high temperature environment, so that the gloves can withstand high temperatures without significant deformation or softening, which significantly enhances the gloves' high temperature resistance. In addition, the cationic properties of quaternary ammonium antimicrobial agents enable them to destroy the bacterial cell membrane structure. During the use of PVC gloves, this antimicrobial property can effectively inhibit the growth and reproduction of bacteria, reduce the risk of bacterial transmission, and improve the safety and hygiene of use. DETAILED DESCRIPTION

[0022] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention. Example

[0023] The present invention provides a technical solution: a paste resin for producing PVC gloves, which is composed of the following materials in parts by mass: 100 parts of vinyl chloride, 3 parts of sodium dodecylbenzene sulfonate, 2 parts of octylphenol polyoxyethylene ether, 0.5 parts of benzoyl peroxide, 0.3 parts of ammonium persulfate, 0.3 parts of dicumyl peroxide and 20 parts of an antibacterial agent modified compound; The antibacterial agent modified compound is composed of the following raw materials in parts by weight: 20 parts of nano titanium dioxide, 3 parts of γ-aminopropyltriethoxysilane, 15 parts of potassium dihydrogen phosphate, 4 parts of toluene and 10 parts of hexadecyltrimethylammonium bromide.

[0024] The antimicrobial agent modified composite is prepared by the following steps: A1. Add nano-titanium dioxide and anhydrous ethanol solution to a three-necked flask equipped with a stirrer, a thermometer and a reflux condenser, start stirring to evenly disperse the nano-titanium dioxide in the anhydrous ethanol, then slowly drop γ-aminopropyltriethoxysilane at a rate of 1 ml / min. After the dropwise addition is complete, heat to 60°C and continue stirring at a constant temperature for 6 hours. After the reaction is complete, transfer the reaction mixture to a centrifuge tube, centrifuge at 8000 rpm for 15 minutes, and collect the precipitate. A2, washing the precipitate with anhydrous ethanol for 3-5 times to remove the unreacted silane coupling agent, and then placing the precipitate in a vacuum drying oven and drying it at 60° C. for 12 hours to obtain grafted nano-titanium dioxide; A3. Prepare a specific buffer solution with a pH of 5, add all the grafted nano-titanium dioxide obtained by the first modification into the buffer solution, start stirring to evenly disperse the grafted nano-titanium dioxide; then add potassium dihydrogen phosphate, raise the temperature to 80°C, and react for 4 hours under stirring; A4. After the reaction is completed, centrifugation is also performed to collect the precipitate; the precipitate is washed with deionized water for 4 times to remove the residual potassium dihydrogen phosphate, and then the precipitate is placed in a vacuum drying oven and dried at 70° C. for 18 hours to obtain phosphorus-modified nano titanium dioxide; A5. Add the phosphorus-modified nano-titanium dioxide after the second modification to the toluene solution, and react in a three-necked flask with a stirrer, a thermometer and a reflux condenser; start stirring, raise the temperature to the reflux temperature of toluene 110° C., stir and react under reflux conditions for 8 hours to uniformly disperse the phosphorus-modified nano-titanium dioxide in toluene, and then add hexadecyltrimethylammonium bromide; A6. After the reaction is completed, hot filtration is first performed to remove impurities in the solution, and then the filtrate is cooled to room temperature and centrifuged again at a speed of 10,000 rpm for 30 minutes to collect the precipitate; the precipitate is washed twice with toluene, and finally the precipitate is placed in a vacuum drying oven and dried at 80°C for 24 hours to obtain the final antibacterial agent modified composite.

[0025] A method for preparing a paste resin for producing PVC gloves comprises the following steps: B1. Mix the raw materials. Add vinyl chloride monomer, sodium dodecylbenzene sulfonate, octylphenol polyoxyethylene ether, benzoyl peroxide, ammonium persulfate, diisopropylbenzene peroxide and antibacterial agent modified compound into deionized water to form a uniform emulsion system. Control the temperature in the reactor at 30°C; the temperature can be controlled by circulating water in the jacket to ensure that the raw materials are fully dissolved and dispersed, and to prevent the polymerization reaction from being initiated prematurely. Stir the polymerization reactor at a speed of 300 rpm for 30 minutes to fully mix the raw materials.

[0026] B2. Polymerization reaction: under stirring and constant temperature conditions, inert gas nitrogen is introduced into the reactor to remove oxygen from the reaction system; then the temperature is slowly raised to 50°C, the polymerization reaction temperature, and the heating rate is controlled at 0.5°C / minute; the polymerization reaction is carried out at a pressure of 0.4MPa, and the reaction time is 4 hours; during the polymerization process, the amount and speed of the initiator are accurately adjusted by the peristaltic pump, and the initiator is replenished every 30 minutes, and each replenishment is 5% of the total amount of the initiator; the polymerization reaction rate is accurately controlled to ensure the smooth progress of the reaction and avoid abnormal conditions such as violent polymerization. The nitrogen flow rate is controlled at 20 ml / minute, and the ventilation time is 15 minutes.

[0027] B3. Drying. After the polymerization reaction is completed, the polymer emulsion is dried by spray drying. The polymer emulsion is transported to the nozzle of the spray drying tower at a speed of 10 ml / min through a peristaltic pump. The nozzle adopts a pressure nozzle with a pressure of 0.2 MPa, which makes the emulsion atomized into tiny droplets. The water is quickly evaporated under the action of hot air to obtain PVC paste resin particles. The inlet temperature of the B3 spray drying equipment is set at 150°C, and the outlet temperature is controlled at 70°C.

[0028] B4. Crushing and packaging: The dried PVC paste resin particles are crushed by a jet mill; the working pressure of the mill is adjusted to 0.6 MPa to make the particle size reach 0.1 micron; the crushed paste resin is then packaged in a moisture-proof and well-sealed aluminum foil composite packaging bag. Example

[0029] The present invention provides a technical solution: a paste resin for producing PVC gloves, which is composed of the following materials in parts by mass: 110 parts of vinyl chloride, 4 parts of sodium dodecylbenzene sulfonate, 5 parts of octylphenol polyoxyethylene ether, 0.6 parts of benzoyl peroxide, 0.4 parts of ammonium persulfate, 0.4 parts of dicumyl peroxide and 23 parts of an antibacterial agent modified compound; The antibacterial agent modified compound is composed of the following raw materials in parts by weight: 20-30 parts of nano titanium dioxide, 4 parts of gamma-aminopropyltriethoxysilane, 18 parts of potassium dihydrogen phosphate, 5 parts of toluene and 11 parts of hexadecyltrimethylammonium bromide.

[0030] The antimicrobial agent modified composite is prepared by the following steps: A1. Add nano-titanium dioxide and anhydrous ethanol solution to a three-necked flask equipped with a stirrer, a thermometer and a reflux condenser, start stirring to evenly disperse the nano-titanium dioxide in the anhydrous ethanol, then slowly drop γ-aminopropyltriethoxysilane at a rate of 2 ml / min. After the dropwise addition is complete, heat to 60°C and continue stirring at a constant temperature for 6 hours. After the reaction is complete, transfer the reaction mixture to a centrifuge tube, centrifuge at 10,000 rpm for 20 minutes, and collect the precipitate. A2, washing the precipitate with anhydrous ethanol for 5 times to remove the unreacted silane coupling agent, and then placing the precipitate in a vacuum drying oven and drying it at 80° C. for 24 hours to obtain grafted nano-titanium dioxide; A3. Prepare a specific buffer solution with a pH of 5, add all the grafted nano-titanium dioxide obtained by the first modification into the buffer solution, start stirring to evenly disperse the grafted nano-titanium dioxide; then add potassium dihydrogen phosphate, raise the temperature to 80°C, and react for 4 hours under stirring; A4. After the reaction is completed, centrifugation is also performed to collect the precipitate; the precipitate is washed with deionized water for 6 times to remove the residual potassium dihydrogen phosphate, and then the precipitate is placed in a vacuum drying oven and dried at 90° C. for 30 hours to obtain phosphorus-modified nano titanium dioxide; A5. Add the phosphorus-modified nano-titanium dioxide after the second modification to the toluene solution, and react in a three-necked flask with a stirrer, a thermometer and a reflux condenser; start stirring, raise the temperature to the reflux temperature of toluene 115° C., stir and react under reflux conditions for 8 hours to uniformly disperse the phosphorus-modified nano-titanium dioxide in toluene, and then add hexadecyltrimethylammonium bromide; A6. After the reaction is completed, hot filtration is first performed to remove impurities in the solution, and then the filtrate is cooled to room temperature and centrifuged again at a speed of 112,000 rpm for 40 minutes to collect the precipitate; the precipitate is washed 3 times with toluene, and finally the precipitate is placed in a vacuum drying oven and dried at 100°C for 48 hours to obtain the final antibacterial agent modified composite.

[0031] A method for preparing a paste resin for producing PVC gloves comprises the following steps: B1. Mix the raw materials. Add vinyl chloride monomer, sodium dodecylbenzene sulfonate, octylphenol polyoxyethylene ether, benzoyl peroxide, ammonium persulfate, diisopropylbenzene peroxide and antibacterial agent modified compound into deionized water to form a uniform emulsion system. Control the temperature in the reactor at 50°C; the temperature can be controlled by jacket circulating water to ensure that the raw materials are fully dissolved and dispersed, and prevent the polymerization reaction from being initiated prematurely. Stir the polymerization reactor at a speed of 500 rpm for 60 minutes to fully mix the raw materials.

[0032] B2. Polymerization reaction: under stirring and constant temperature conditions, inert gas nitrogen is introduced into the reactor to remove oxygen from the reaction system; then the temperature is slowly raised to 70°C, and the heating rate is controlled at 1°C / minute; the polymerization reaction is carried out at a pressure of 0.6MPa and the reaction time is 8 hours; during the polymerization process, the amount and speed of initiator addition are accurately adjusted by a peristaltic pump, and the initiator is replenished every 60 minutes, and each replenishment is 10% of the total amount of initiator; the polymerization reaction rate is accurately controlled to ensure smooth progress of the reaction and avoid abnormal conditions such as violent polymerization. The nitrogen flow rate is controlled at 30 ml / minute, and the ventilation time is 30 minutes.

[0033] B3. Drying. After the polymerization reaction is completed, the polymer emulsion is dried by spray drying. The polymer emulsion is transported to the nozzle of the spray drying tower at a speed of 20 ml / min through a peristaltic pump. The nozzle adopts a pressure nozzle with a pressure of 0.4 MPa, which makes the emulsion atomized into tiny droplets. The water is quickly evaporated under the action of hot air to obtain PVC paste resin particles. The inlet temperature of the spray drying equipment is set at 150-200°C, and the outlet temperature is controlled at 90°C.

[0034] B4. Crushing and packaging: the dried PVC paste resin particles are crushed by a jet mill; the working pressure of the mill is adjusted to 0.8 MPa so that the particle size reaches 10 microns; the crushed paste resin is then packaged in a moisture-proof aluminum foil composite packaging bag with good sealing performance. Example

[0035] The present invention provides a technical solution: a paste resin for producing PVC gloves, which is composed of the following materials in parts by mass: 120 parts of vinyl chloride, 5 parts of sodium dodecylbenzene sulfonate, 7 parts of octylphenol polyoxyethylene ether, 0.7 parts of benzoyl peroxide, 0.5 parts of ammonium persulfate, 0.5 parts of dicumyl peroxide and 25 parts of an antibacterial agent modified compound; The antibacterial agent modified compound is composed of the following raw materials in parts by weight: 30 parts of nano titanium dioxide, 5 parts of γ-aminopropyltriethoxysilane, 20 parts of potassium dihydrogen phosphate, 6 parts of toluene and 12 parts of hexadecyltrimethylammonium bromide.

[0036] The antimicrobial agent modified composite is prepared by the following steps: A1. Add nano-titanium dioxide and anhydrous ethanol solution to a three-necked flask equipped with a stirrer, a thermometer and a reflux condenser, start stirring to evenly disperse the nano-titanium dioxide in the anhydrous ethanol, then slowly drop γ-aminopropyltriethoxysilane at a rate of 2 ml / min. After the dropwise addition is complete, heat to 60°C and continue stirring at a constant temperature for 6 hours. After the reaction is complete, transfer the reaction mixture to a centrifuge tube, centrifuge at 10,000 rpm for 20 minutes, and collect the precipitate. A2, washing the precipitate with anhydrous ethanol for 5 times to remove the unreacted silane coupling agent, and then placing the precipitate in a vacuum drying oven and drying it at 80° C. for 24 hours to obtain grafted nano-titanium dioxide; A3. Prepare a specific buffer solution with a pH of 5, add all the grafted nano-titanium dioxide obtained by the first modification into the buffer solution, start stirring to evenly disperse the grafted nano-titanium dioxide; then add potassium dihydrogen phosphate, raise the temperature to 80°C, and react for 4 hours under stirring; A4. After the reaction is completed, centrifugation is also performed to collect the precipitate; the precipitate is washed with deionized water for 6 times to remove the residual potassium dihydrogen phosphate, and then the precipitate is placed in a vacuum drying oven and dried at 90° C. for 30 hours to obtain phosphorus-modified nano titanium dioxide; A5. Add the phosphorus-modified nano-titanium dioxide after the second modification to the toluene solution, and react in a three-necked flask with a stirrer, a thermometer and a reflux condenser; start stirring, raise the temperature to the reflux temperature of toluene 115° C., stir and react under reflux conditions for 8 hours to uniformly disperse the phosphorus-modified nano-titanium dioxide in toluene, and then add hexadecyltrimethylammonium bromide; A6. After the reaction is completed, hot filtration is first performed to remove impurities in the solution, and then the filtrate is cooled to room temperature and centrifuged again at a speed of 112,000 rpm for 40 minutes to collect the precipitate; the precipitate is washed 3 times with toluene, and finally the precipitate is placed in a vacuum drying oven and dried at 100°C for 48 hours to obtain the final antibacterial agent modified composite.

[0037] A method for preparing a paste resin for producing PVC gloves comprises the following steps: B1. Mix the raw materials. Add vinyl chloride monomer, sodium dodecylbenzene sulfonate, octylphenol polyoxyethylene ether, benzoyl peroxide, ammonium persulfate, diisopropylbenzene peroxide and antibacterial agent modified compound into deionized water to form a uniform emulsion system. Control the temperature in the reactor at 50°C; the temperature can be controlled by jacket circulating water to ensure that the raw materials are fully dissolved and dispersed, and prevent the polymerization reaction from being initiated prematurely. Stir the polymerization reactor at a speed of 500 rpm for 60 minutes to fully mix the raw materials.

[0038] B2. Polymerization reaction: under stirring and constant temperature conditions, inert gas nitrogen is introduced into the reactor to remove oxygen from the reaction system; then the temperature is slowly raised to 70°C, and the heating rate is controlled at 1°C / minute; the polymerization reaction is carried out at a pressure of 0.6MPa and the reaction time is 8 hours; during the polymerization process, the amount and speed of initiator addition are accurately adjusted by a peristaltic pump, and the initiator is replenished every 60 minutes, and each replenishment is 10% of the total amount of initiator; the polymerization reaction rate is accurately controlled to ensure smooth progress of the reaction and avoid abnormal conditions such as violent polymerization. The nitrogen flow rate is controlled at 30 ml / minute, and the ventilation time is 30 minutes.

[0039] B3. Drying. After the polymerization reaction is completed, the polymer emulsion is dried by spray drying. The polymer emulsion is transported to the nozzle of the spray drying tower at a speed of 20 ml / min through a peristaltic pump. The nozzle adopts a pressure nozzle with a pressure of 0.4 MPa, which makes the emulsion atomized into tiny droplets. The water is quickly evaporated under the action of hot air to obtain PVC paste resin particles. The inlet temperature of the spray drying equipment is set at 150-200°C, and the outlet temperature is controlled at 90°C.

[0040] B4. Crushing and packaging: the dried PVC paste resin particles are crushed by a jet mill; the working pressure of the mill is adjusted to 0.8 MPa so that the particle size reaches 10 microns; the crushed paste resin is then packaged in a moisture-proof aluminum foil composite packaging bag with good sealing performance.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A paste resin for producing PVC gloves, characterized in that: The invention is composed of the following materials in parts by weight: 100-120 parts of vinyl chloride, 3-5 parts of sodium dodecylbenzene sulfonate, 2-7 parts of octylphenol polyoxyethylene ether, 0.5-0.7 parts of benzoyl peroxide, 0.3-0.5 parts of ammonium persulfate, 0.3-0.5 parts of dicumyl peroxide and 20-25 parts of antibacterial agent modified compound; The antibacterial agent modified compound is composed of the following raw materials in parts by weight: 20-30 parts of nano titanium dioxide, 3-5 parts of gamma-aminopropyltriethoxysilane, 15-20 parts of potassium dihydrogen phosphate, 4-6 parts of toluene and 10-12 parts of hexadecyltrimethylammonium bromide.

2. The paste resin for producing PVC gloves according to claim 1, characterized in that: The antimicrobial agent modified composite is prepared by the following steps: A1. Add nano-titanium dioxide and anhydrous ethanol solution to a three-necked flask equipped with a stirrer, a thermometer and a reflux condenser, start stirring to evenly disperse the nano-titanium dioxide in the anhydrous ethanol, and then slowly drop γ-aminopropyltriethoxysilane; after the reaction is completed, transfer the reaction mixture to a centrifuge tube, centrifuge at a speed of 8000-10000 rpm for 15-20 minutes, and collect the precipitate; A2, washing the precipitate with anhydrous ethanol for 3-5 times to remove the unreacted silane coupling agent, and then placing the precipitate in a vacuum drying oven and drying it at 60-80° C. for 12-24 hours to obtain grafted nano-titanium dioxide; A3. Prepare a specific buffer solution with a pH value of 5, add all the grafted nano-titanium dioxide obtained by the first modification into the buffer solution, and start stirring to make the grafted nano-titanium dioxide evenly dispersed; Then potassium dihydrogen phosphate was added, the temperature was raised to 80°C, and the reaction was carried out for 4 hours under stirring; A4. After the reaction is completed, centrifuge the mixture to collect the precipitate. Wash the precipitate with deionized water for 4-6 times to remove the residual potassium dihydrogen phosphate. Then, place the precipitate in a vacuum drying oven and dry it at 70-90° C. for 18-30 hours to obtain phosphorus-modified nano titanium dioxide. A5. Add the phosphorus-modified nano-titanium dioxide after the second modification into the toluene solution, and react in a three-necked flask with a stirrer, a thermometer and a reflux condenser; start stirring to evenly disperse the phosphorus-modified nano-titanium dioxide in toluene, and then add hexadecyltrimethylammonium bromide; A6. After the reaction is completed, first perform hot filtration to remove impurities in the solution, then cool the filtrate to room temperature, centrifuge again, and collect the precipitate; wash the precipitate with toluene 2-3 times, and finally place the precipitate in a vacuum drying oven and dry it at 80-100°C for 24-48 hours to obtain the final antibacterial agent modified composite.

3. The paste resin for producing PVC gloves according to claim 2, characterized in that: In the A1, the dropping speed is controlled to be 1-2 ml / min. After the dropping is completed, the temperature is raised to 60° C. and the reaction is continuously stirred for 6 hours under constant temperature conditions.

4. The paste resin for producing PVC gloves according to claim 2, characterized in that: The centrifugation operation in A4 is performed at a speed of 9000-11000 rpm for 20-30 minutes.

5. The paste resin for producing PVC gloves according to claim 2, characterized in that: The three-necked flask in A5 was heated to the reflux temperature of toluene, 110-115° C., and stirred for reaction under reflux conditions for 8 hours.

6. The paste resin for producing PVC gloves according to claim 2, characterized in that: The A6 medium was centrifuged at 10,000-12,000 rpm for 30-40 minutes.

7. A method for preparing a paste resin for producing PVC gloves, characterized in that: It consists of the following steps: B1. Mix the raw materials, add vinyl chloride monomer, sodium dodecylbenzene sulfonate, octylphenol polyoxyethylene ether, benzoyl peroxide, ammonium persulfate, dicumyl peroxide and antibacterial agent modified complex into deionized water to form a uniform emulsion system, and control the temperature in the reactor to be 30-50°C; B2, polymerization reaction, under stirring and constant temperature conditions, inert gas nitrogen is introduced into the reactor to remove oxygen in the reaction system; then the temperature is slowly raised to the polymerization reaction temperature of 50-70°C, and the heating rate is controlled at 0.5-1°C / minute; the polymerization reaction is carried out at a pressure of 0.4-0.6MPa, and the reaction time is 4-8 hours; during the polymerization process, the amount and speed of the initiator are accurately adjusted by a peristaltic pump, and the initiator is replenished every 30-60 minutes, and the amount of each replenishment is 5%-10% of the total amount of the initiator; B3, drying, after the polymerization reaction is completed, the polymer emulsion is dried by spray drying; the polymer emulsion is transported to the nozzle of the spray drying tower at a speed of 10-20 ml / min by a peristaltic pump, and the nozzle adopts a pressure nozzle with a pressure of 0.2-0.4 MPa, so that the emulsion is atomized into tiny droplets, and the water is quickly evaporated under the action of hot air to obtain PVC paste resin particles; B4. Crushing and packaging: The dried PVC paste resin particles are crushed by a jet mill; the working pressure of the mill is adjusted to 0.6-0.8MPa to make the particle size reach 0.1-10 microns; then the crushed paste resin is packaged in a moisture-proof and well-sealed aluminum foil composite packaging bag.

8. The paste resin for producing PVC gloves and the preparation method thereof according to claim 7, characterized in that: The polymerization reaction kettle in B1 is stirred at a speed of 300-500 rpm for 30-60 minutes to fully mix the raw materials.

9. The paste resin for producing PVC gloves and the preparation method thereof according to claim 7, characterized in that: The nitrogen flow rate in B2 is controlled at 20-30 ml / min, and the ventilation time is 15-30 minutes.

10. The paste resin for producing PVC gloves and the preparation method thereof according to claim 7, characterized in that: The inlet air temperature of the B3 spray drying equipment is set at 150-200°C, and the outlet air temperature is controlled at 70-90°C.