CN110746647B - Vulcanizing agent emulsion and preparation method and application thereof - Google Patents
Vulcanizing agent emulsion and preparation method and application thereof Download PDFInfo
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/548—Silicon-containing compounds containing sulfur
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08K13/02—Organic and inorganic ingredients
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08J2307/02—Latex
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Abstract
The invention discloses a vulcanizing agent emulsion which comprises the following raw materials in parts by mass: 50-100 parts of silane coupling agent, 5-10 parts of oily emulsifier, 5-10 parts of water-based emulsifier, 1-2 parts of pH regulator, 0.5-1.0 part of mechanical stabilizer, 0.01-0.1 part of defoamer and 50-1000 parts of soft water. The vulcanizing agent emulsion has small particle size and uniform distribution, can be effectively and uniformly dispersed in latex, can improve the tensile strength, the tearing strength and the elongation of a latex product and the uniformity of the product, and can improve the performances of chemical resistance, thermal oxygen resistance, ultraviolet aging resistance, cold resistance and the like, thereby having wide application prospect. The invention also discloses a preparation method and application of the vulcanizing agent emulsion, and the preparation and application engineering is simple to operate, easy to control, low in cost and environment-friendly.
Description
Technical Field
The invention belongs to the technical field of vulcanizing agent emulsification processing, and particularly relates to a vulcanizing agent emulsion and a preparation method and application thereof.
Background
The coupling agent is divided into four categories of silane, organic chromium complex, titanate and aluminate compounds according to chemical structure and composition. Among them, silanes, which have the general formula RSiX, are most used in rubber3Wherein R represents amino, sulfydryl, vinyl, epoxy, cyano, methacryloxy and other groups, the groups have strong reactivity with different matrix resins, and X represents an alkoxy group capable of being hydrolyzed (such as methoxy, ethoxy and the like). Is easy to hydrolyze and condense to form polysiloxane. When the silane coupling agent is directly added into latex, the polysiloxane is easy to condense to form polysiloxane with large brittleness, no elasticity and low strength, and no reinforcing effect exists, so that the silane coupling agent is rarely applied to the latex. The silane coupling agent has several models such as KH550, KH560, KH570, KH580, KH590, Si69, Si75, Si74 and the like at home.
The silane coupling agent is a substance with two functional groups with different properties, and the molecular structure of the silane coupling agent is mainly characterized in that molecules contain two groups with different chemical properties, one group is an inorganophilic group and is easy to chemically react with the surface of an inorganic substance; the other is an organophilic group which is capable of chemically reacting with or forming hydrogen bonds soluble in synthetic resins or other polymers. Therefore, the coupling agent is called as a molecular bridge and is used for improving the interface action between inorganic matters and organic matters, so that the properties of the composite material, such as physical properties, electrical properties, thermal properties, optical properties, dispersibility and the like, are greatly improved.
Because the silane coupling agent has two groups with reactivity, when the nano material is used as the rubber reinforcing agent, because the nano particles are prepared under non-equilibrium and harsh conditions, surface atoms of the nano material are in a highly activated state, the surface energy is very large, the nano particles are easy to agglomerate, and the surface characteristics and the lower dispersion energy of the nano particles cause poor compatibility with rubber. After the nano white carbon black is treated by the coupling agent, the surface energy of the nano white carbon black is reduced, the nano white carbon black is easily infiltrated by rubber macromolecules, the dispersion degree in rubber is improved, meanwhile, the coupling agent plays a bridge role between the rubber and the filler, the interface bonding of nano white carbon black particles and a rubber matrix is enhanced, and the reinforcing capacity of the rubber matrix is improved.
The silane coupling agent plays a role in coupling and filling in a system, and the addition of the coupling agent in the rubber vulcanization process can improve the vulcanization characteristic of rubber materials, so that the processing performance and the mechanical property of rubber products are obviously improved. When the amount of the coupling agent is less, the rubber macromolecules are less bound, the sliding orientation is easy, the stress distribution is uniform, and therefore the tensile strength is higher; along with the increase of the using amount of the coupling agent, the number of the coupling agent molecules is increased, the rubber macromolecules are greatly bound and are not easy to slide, and the stress distribution is not uniform, so that the tensile strength is reduced; the dosage of the coupling agent is continuously increased, and the excessive coupling agent is filled in the system, so that the macromolecular chains are easy to slide and orient, the stress distribution is uniform, and the tensile strength is increased. The silane coupling agent can also improve the physical processing performance of the filled rubber, and because the silane coupling agent improves the compatibility and easy dispersibility between the filler and the base rubber, the viscosity of the rubber material is reduced, the mixing time is shortened, the extrusion processing performance is improved, and the product quality is improved. Therefore, the silane coupling agent is widely applied to dry glue.
Since the silane coupling agent can decompose active group sulfur and the like at high temperature to perform a crosslinking reaction with the rubber, the silane coupling agent can partially or completely replace other vulcanizing agents such as sulfur or accelerators. Reinforcement is an extremely important way to improve the properties of rubber articles, and reinforcement of latex has been attracting attention but has not achieved significant effects so far. Carbon black with good reinforcing effect on dry rubber has no reinforcing effect on latex, and the strength of a latex adhesive film is often reduced. This is because when the dry rubber and carbon black are kneaded by a rubber mixer, a large number of radicals are generated in rubber molecules due to the action of a strong shearing force and the presence of air, and these radicals are strongly physically adsorbed and chemically bonded to compounding agents such as carbon black to form a special spatial network structure, thereby exerting a reinforcing effect. The latex is not strongly mechanically treated, and the carbon black particles cannot directly contact with the colloidal particles to form a direct reinforcing structure of the dry rubber due to the isolation effect of the colloidal particle protective layer, but are dispersed around the colloidal particles, so that the bonding effect among the colloidal particles is reduced, and the performance of the film is reduced. Three conditions must be met for direct latex reinforcement: (1) the reinforcing agent is highly dispersed in the latex, so that rubber particles and reinforcing agent particles generate good contact surfaces; (2) the reinforcing agent and the particles of the dispersed phase are co-precipitated to form a film during film forming; (3) the rubber particles are brought into direct contact with the reinforcing agent particles.
The reinforcing method for natural latex is characterized by adding resorcinol-formaldehyde resin and lignin, etc., in which the lignin reinforcing effect is not large, and the resorcinol-formaldehyde resin has strong reinforcing action, but its condensation polymer and polycondensation degree are not well controlled, and its operation is complex, and other methods, such as lignin, etc., have small improvement range for physical and mechanical properties of latex product, and are limited in application, in particular in the field of sounding balloon. It is known that the levitation height of sounding balloon is related to the physical and mechanical properties of balloon, such as the improvement of tensile strength, tear strength and elongation of balloon, besides the release conditions of balloon, the appearance performance of balloon, appearance and other factors, which is beneficial to increase of the blasting volume and the levitation height of meteorological balloon. However, in the prior art, when resin is added into latex, the tensile strength and the tearing strength of the product are improved, but the elongation and the cold resistance are reduced, and the rising height of the balloon is seriously influenced.
The coupling agent is a cross-linking agent and a softening agent, and can improve the tensile property and the elongation of a latex product and also improve the elongation when added into the latex, but the coupling agent is insoluble in water and easy to hydrolyze in water, and the application of the coupling agent in the latex is limited. We find that the technical problem can be effectively solved by adding the coupling agent into the latex after the coupling agent is emulsified, the application field of the coupling agent can be expanded, the comprehensive physical and mechanical properties of a latex product can be greatly improved, and the progress of the latex technology is promoted, so that the vulcanizing agent emulsion prepared by the coupling agent is used for vulcanization, and the application prospect is wide.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects and shortcomings in the background art, and provide a vulcanizing agent emulsion, and a preparation method and application thereof.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a vulcanizing agent emulsion comprises the following raw materials in parts by weight:
in the vulcanizing agent emulsion, the silane coupling agent is preferably one or more of gamma-aminopropyltriethoxysilane (coupling agent KH-560), gamma-glycidoxypropyltrimethoxysilane (coupling agent 570), gamma-methacryloxypropyltrimethoxysilane (KH-590), gamma-mercaptopropyltrimethoxysilane (silane coupling agent KH-590), gamma-mercaptopropylethoxybis (propyl-hexaethoxy-siloxane) (Si 747), bis- [ gamma- (triethoxysilyl) propyl ] -disulfide (Si 75), and bis- (gamma-triethoxysilylpropyl) tetrasulfide (silane coupling agent Si-69).
Preferably, the mass content of the silane coupling agent contained in the vulcanizing agent emulsion is 20-40%.
Preferably, the oily emulsifier is any one or more of sorbitan monolaurate (trade name span 20), sorbitan monopalmitate (trade name span 40), sorbitan monostearate (trade name span 60), sorbitan monooleate (trade name span 80), oleic acid and the like.
Preferably, the aqueous emulsifier is any one or more of triethanol ammonium, ammonium oleate, potassium oleate, triethanol oleate, aromatic polyethylene glycol-ether, polyether polysulfides, sodium alkylsulfates, sodium dibutylnaphthalenesulfonate, sodium isobutylnaphthalenesulfonate, sodium dioctylsulfosuccinate, sodium dodecylbenzenesulfonate, adducts of ethylene oxide with fatty alcohols, polyoxyethylene sorbitan monolaurate (trade name tween 20), polyoxyethylene sorbitan monopalmitate (trade name tween 40), polyoxyethylene sorbitan monostearate (trade name tween 60), and polyoxyethylene sorbitan monooleate (trade name tween 80).
Preferably, the pH regulator is one or more of potassium hydroxide, sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate and the like.
Preferably, the mechanical stabilizer is one or more of potassium hydroxide, sodium hydroxide, potassium laurate, ammonium laurate, sodium vinylsulfonate, sodium N-methyl-N-oleoyl taurate, a condensate of ethylene oxide and fatty alcohol (peregal O), octyl phenyl polyoxyethylene ether (trade name 65-03, also called emulsifier OP-10), and the like.
Preferably, the defoaming agent is any one or more of an organic siloxane emulsion defoaming agent, a polysiloxane polyether copolymer defoaming agent, a sec-octanol isomeric methylcyclohexanol mixture 201-100 methylsilicone, a defoaming agent 691, a defoaming agent WBA, a defoaming agent 8034A and the like.
Based on a general inventive concept, the present invention provides a method for preparing the vulcanizing agent emulsion, comprising the following steps:
(1) adding an oily emulsifier into the coupling agent, heating and uniformly stirring to obtain a vulcanizing agent crude emulsion;
(2) mixing an aqueous emulsifier, a pH regulator, a mechanical stabilizer, a defoaming agent and soft water, heating, adding the vulcanizing agent coarse emulsion obtained in the step (1), and shearing and emulsifying;
(3) standing the emulsified liquid obtained after the emulsification in the step (2) for a period of time, and filtering to obtain the vulcanizing agent emulsion.
In the preparation method, preferably, in the step (1), the stirring speed is 300-500 r/min, the stirring temperature is 50-70 ℃, and the stirring time is 20-30 min.
Preferably, in the step (2), the heating temperature is 50-70 ℃, and the emulsifying shear speed is 5000-9000 r/min; in the step (3), the parking time is at least 24 h.
Based on a general inventive concept, the invention also provides an application of the vulcanizing agent emulsion, and the vulcanizing agent emulsion is used for preparing rubber products.
The vulcanizing agent emulsion is obtained by emulsifying the silane coupling agent, the vulcanizing agent emulsion can be uniformly dispersed after being added into the latex, when the latex is solidified, the active group of the silane coupling agent or the decomposed active group and the rubber are subjected to a crosslinking reaction at a certain temperature, so that the latex is reinforced, the tensile strength and the tear strength are improved, for example, the silane coupling agent Si-69 and sulfur can form a balanced vulcanization system, the bond breaking rate of polysulfide crosslinking bonds after being vulcanized is balanced with the rate of regenerating the crosslinking bonds through Si-69, the constant crosslinking density is kept, and the generation of reversion effect is well avoided or reduced, so that the aging performance is improved.
The emulsion preparation method has four emulsion modes:
(1) agent in water method: the emulsifier is added directly to water and oil is added under vigorous stirring to obtain oil-in-water (O/W) emulsion, which has coarse particles, uneven size and poor stability.
(2) Agent in oil method: the emulsifier is added directly to the oil, then the water and aqueous emulsifier are added together and then emulsified by mechanical high speed shearing. The emulsion obtained by the method is uniform, the particle size is consistent, and the particle diameter is about 0.5 mu m, which is the most stable method. However, the required amount of the emulsifier is large, and after the emulsifier is added into the latex, the forming process of the latex and the physical and mechanical properties of the latex are influenced.
(3) The alternate flow liquid adding method comprises the following steps: the two liquids are added in small amounts by turns. The method is complex to operate, low in efficiency and poor in stability.
(4) The primary soap method comprises the following steps: dissolving fatty acid in oil, dissolving alkali solution in water, and contacting at interface of two phases to obtain soap, or obtain stable emulsion. When emulsifying by the nascent soap method, the fatty acid and the alkali are heated to 70-85 ℃ before emulsification, and when the fatty acid and the alkali are mixed at high speed, the soap emulsifier can be quickly reacted and generated in situ, the coarse emulsion of the silane coupling agent is emulsified into fine emulsion, the stability and the emulsification effect of the emulsion are improved, and the using amount of the emulsifier is reduced. Such as oleic acid/triethanolamine to form triethanolamine oleate; oleic acid/potassium hydroxide produced potassium oleate.
The invention adopts a nascent soap method, the method has high emulsification speed, and can effectively reduce the hydrolysis of the silane coupling agent; the emulsion has high stability and good emulsifying effect, and after being added into latex, the emulsion has good film forming property and good forming process; the dosage of the emulsifier is small, and the amount of the emulsifier carried into the latex is also small, so that the method has small influence on the physical and mechanical properties of the latex product and is a better method for emulsifying the silane coupling agent.
The stability of the emulsion is related to the strength of the interfacial film, the interfacial film generated by a single surfactant is not compact, the mechanical strength is not high, the emulsion is easy to crack and unstable, and after the emulsifier with a large HLB value difference is compounded, hydrophilic groups of the water-soluble surfactant, such as polyoxyethylene groups, have strong interaction with a water phase, and the groups are deeper into the water phase, so that hydrophobic groups of two surface active compounds are more closely arranged in the interfacial film, thereby generating a synergistic effect, improving the mechanical strength of the interfacial film and stabilizing the emulsion. For example, the silane coupling agent can be well emulsified by the combination of oleic acid with the HLB value of 1.0, span 80 with the HLB value of 4.3 and potassium oleate with the HLB value of 20.0 (the oleic acid is generated by the reaction of potassium hydroxide), and the combination of span 80 with the HLB value of 4.3, sodium dodecyl sulfate with the HLB value of 10.638 and Tween 40 with the HLB value of 15.6.
In addition, because emulsification requires continuous stirring, mechanical power can destroy the stability of the emulsion, and a proper mechanical stabilizer needs to be added into the emulsification formula; the emulsion has high viscosity, which is not beneficial to emulsification and storage, and the pH value regulator such as potassium hydroxide can improve the pH value of the emulsion, reduce the viscosity and reduce the hydrolysis possibility of the silane coupling agent, thereby improving the stability of the emulsion.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the silane coupling agent and the oily emulsifier are heated and mixed uniformly, and then added into the water phase containing the aqueous emulsifier, and are emulsified into a homogeneous vulcanizing agent emulsion at a certain speed, temperature and time, and the homogeneous vulcanizing agent emulsion can be directly added into the water-based latex, and can be effectively and uniformly dispersed in the latex due to small particle size and uniform distribution, so that the tensile strength, the tearing strength, the elongation and the uniformity of the product of the latex product can be improved, the contradiction that the tensile strength and the elongation are difficult to increase simultaneously is effectively solved, the chemical resistance, the thermal oxygen resistance, the ultraviolet aging resistance, the cold resistance and the like of the latex product can be improved, and the application prospect is wide.
2. The invention can uniformly disperse the silane coupling agent into latex after preparing the vulcanizing agent emulsion, does not generate sedimentation or coagulation and coarsening of dispersion particles like other solid vulcanizing agents such as sulfur or accelerators, and brings fatal defects to latex products, thereby improving the uniformity of products, the service performance and the service life of the products.
3. The preparation method disclosed by the invention is simple to operate, easy to control, low in cost and green and environment-friendly in preparation process.
Detailed Description
In order to facilitate an understanding of the invention, the invention will be described more fully and in detail with reference to the preferred embodiments, but the scope of the invention is not limited to the specific embodiments described below.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
Example 1:
the vulcanizing agent emulsion for the latex product comprises the following raw materials in parts by mass:
the preparation method comprises the following steps:
(1) adding a silane coupling agent Si-69, oleic acid and span 80 into a glass reaction kettle, heating to 60 ℃ at the rotation speed of 350r/min, stirring for 30min, and dispersing uniformly to obtain a silicon rubber coarse emulsion;
(2) adding sodium dodecyl sulfate, potassium hydroxide, a defoaming agent WBA and soft water into a reaction kettle, heating to 70 ℃, adding the crude silicone rubber emulsion, and emulsifying at a shearing speed of 6500 r/min;
(3) standing the emulsified liquid obtained after the emulsification in the step (2) for 24 hours, and filtering to obtain the vulcanizing agent emulsion for the latex product, wherein the content of a vulcanizing agent (a silane coupling agent) is 20%.
Example 2:
the vulcanizing agent emulsion for the latex product comprises the following raw materials in parts by mass:
the preparation method comprises the following steps:
(1) adding a silane coupling agent Si-75 and span 80 into a glass reaction kettle, heating to 70 ℃ at the rotation speed of 400r/min, stirring for 30min, and dispersing uniformly to obtain a silicon rubber coarse emulsion;
(2) adding sodium dodecyl sulfate, tween 40, potassium hydroxide, a defoaming agent WBA and soft water into a reaction kettle, heating to 70 ℃, adding the crude silicone rubber emulsion, and emulsifying at a shearing speed of 7000 r/min;
(3) standing the emulsified liquid obtained after the emulsification in the step (2) for 24 hours, and filtering to obtain the vulcanizing agent emulsion for the latex product, wherein the content of a vulcanizing agent (a silane coupling agent) is 40%.
Comparative example 1:
before the production, the sulfur is added into a latex product to be prepared into a vulcanizing agent dispersion with a certain solid content in advance, and after the vulcanizing agent dispersion is added into the latex, the latex is generally kept for a certain time to defoam and mature the composite latex, so that the production can be carried out. In the process of parking, sulfur in the composite rubber can be aggregated and generate certain settlement, so that some properties of the rubber are affected. The emulsified Si-69 (the vulcanizing agent emulsion obtained in example 1 of the present invention) can be uniformly dispersed in the latex without causing the problem of sedimentation, and can be used as liquid sulfur.
The latex product prepared by the vulcanizing agent emulsion obtained in the embodiment 1 of the invention and the latex product prepared by the traditional vulcanizing agent dispersion are subjected to performance comparison experiments, and the experimental processes are as follows:
the preparation method of the traditional vulcanizing agent dispersion comprises the following steps:
(1) adding sulfur into a sand mill, adding a dispersing agent NF, a stabilizing agent casein, a pH regulator KO and soft water, adding phi 2mm glass beads, and soaking for 8 hours;
(2) grinding the dispersion for 8 hours at the rotating speed of 400r/min and the temperature of less than 45 ℃;
(3) and (3) filtering the dispersion obtained after grinding in the step (2) by using 100 nylon cloth with double-layer mesh number to obtain the vulcanizing agent dispersion.
Latex products are prepared by respectively adopting the vulcanizing agent emulsion obtained in the embodiment 1 of the invention and the traditional vulcanizing agent dispersion, and the basic formula is as follows: 100g of natural latex, 0.3g of zinc oxide, 0.0 g of anti-aging agent D1.0g, 0.2g of casein, 0.15g of dispersing agent NF, 0.13g of potassium hydroxide and 1.4g of accelerator PX, wherein the variables are vulcanizing agent dispersoid in the traditional method or vulcanizing agent emulsion in the invention. The test results are specifically shown in table 1 below.
Table 1: comparison of different addition amounts of the vulcanizing agent emulsion obtained in example 1 of the invention on the performance of the latex product
| Recipe number | 1 | 2 | 3 | 4 | Detection standard |
| Vulcanizing agent dispersion, g | 1 | 0.5 | 1 | 0 | / |
| Vulcanizing agent emulsion g | 0 | 2 | 4 | 6 | / |
| Elongation percentage of% | 940 | 1070 | 1050 | 1060 | GB/T528-2009 |
| Tensile strength, Mpa | 19.5 | 22.5 | 21.9 | 22.2 | GB/T528-2009 |
As can be seen from table 1: on the basis of the original formula, after the emulsified Si-69 (the vulcanizing agent emulsion of the invention) is added to completely or partially replace the traditional vulcanizing agent dispersoid, the tensile strength and the elongation of the latex product are greatly improved, the tensile strength is higher than nearly 5Mpa, which shows that the Si-69 participates in the vulcanization reaction and can completely replace the traditional vulcanizing agent dispersoid.
To better illustrate the advantages of the present invention, the latex articles prepared from the vulcanizer emulsion obtained in example 1 of the present invention and the latex articles prepared from the conventional vulcanizer dispersion were subjected to performance comparison tests on their tear strength, thermo-oxidative aging resistance, UV aging resistance, cold resistance, chemical resistance and uniformity of the product, the performances are shown in Table 2, wherein the basic formulation of the two and the preparation method of the conventional vulcanizer dispersion are the same as above.
Table 2: the performance of the vulcanizing agent emulsion obtained in the example 1 of the invention is compared with that of the product prepared by the traditional vulcanizing agent dispersion
As can be seen from Table 2, after the vulcanizing agent emulsion partially replaces the traditional vulcanizing agent dispersion, the tear strength, hot air aging, ultraviolet aging and sulfuric acid resistance of the latex product are greatly improved, and meanwhile, the low-temperature brittleness of the product and the uniformity of the product are improved, and the advantages are beneficial to improving the quality of the latex product, such as the lifting height of a meteorological balloon, so that the invention has great advantages.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the technical principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The vulcanizing agent emulsion is characterized by comprising the following raw materials in parts by mass:
the vulcanizing agent emulsion is mainly prepared by the following steps:
(1) adding an oily emulsifier into a silane coupling agent, heating and uniformly stirring to obtain a vulcanizing agent crude emulsion; the stirring speed is 300-500 r/min, the stirring temperature is 50-70 ℃, and the stirring time is 20-30 min;
(2) mixing an aqueous emulsifier, a pH regulator, a mechanical stabilizer, a defoaming agent and soft water, heating, adding the vulcanizing agent coarse emulsion obtained in the step (1), and shearing and emulsifying;
(3) standing the emulsified liquid obtained after the emulsification in the step (2) for a period of time, and filtering to obtain the vulcanizing agent emulsion.
2. The vulcanizing agent emulsion according to claim 1, wherein the silane coupling agent is any one or more of gamma-aminopropyltriethoxysilane, gamma-glycidoxypropyltrimethoxysilane, gamma-methacryloxypropyltrimethoxysilane, gamma-mercaptopropyltrimethoxysilane, gamma-mercaptopropylethoxybis (propylalkyl-hexaethoxy-siloxane), bis- [ gamma- (triethoxysilyl) propyl ] -disulfide, and bis (gamma-triethoxysilylpropyl) tetrasulfide; in the vulcanizing agent emulsion, the mass content of the silane coupling agent is 20-40%.
3. The vulcanizing agent emulsion according to claim 1, wherein the oily emulsifier is any one or more of sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan monooleate and oleic acid.
4. A vulcanizer emulsion as set forth in claim 1, wherein said aqueous emulsifier is any one or more selected from the group consisting of triethanolammonium, ammonium oleate, potassium oleate, triethanol oleate, aromatic polyethylene glycol ether, polyether polysulfide, sodium alkylsulfate, sodium dibutylnaphthalene sulfonate, sodium isobutylnaphthalene sulfonate, sodium dioctylsulfosuccinate, sodium dodecylsulfonate, an adduct of ethylene oxide and a fatty alcohol, polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monopalmitate, polyoxyethylene sorbitan monostearate and polyoxyethylene sorbitan monooleate.
5. The vulcanizing agent emulsion according to any one of claims 1 to 4, wherein the pH regulator is any one or more of potassium hydroxide, sodium carbonate, potassium carbonate, sodium bicarbonate and potassium bicarbonate; the mechanical stabilizer is one or more of potassium hydroxide, sodium hydroxide, potassium laurate, ammonium laurate, sodium vinylsulfonate, N-methyl-N-oleoyl taurate, a condensate of ethylene oxide and fatty alcohol, and octyl phenyl polyoxyethylene ether.
6. The vulcanizing agent emulsion according to any one of claims 1 to 4, wherein the defoaming agent is any one or more of an organic siloxane emulsion defoaming agent, a polysiloxane polyether copolymerization type defoaming agent, a sec-octanol isomeric methylcyclohexanol mixture 201-100 methylsilane, a defoaming agent 691, a defoaming agent WBA and a defoaming agent 8034A.
7. A vulcanizing agent emulsion according to any one of claims 1 to 4, wherein in the step (2), the heating temperature is 50 to 70 ℃, and the emulsifying shear rate is 5000 to 9000 r/min; in the step (3), the parking time is at least 24 h.
8. Use of a vulcanising agent emulsion as claimed in any one of claims 1 to 7 for the preparation of rubber articles with the vulcanising agent emulsion.
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| CN115449417B (en) * | 2022-09-23 | 2023-07-14 | 神华准能资源综合开发有限公司 | Naphthalene compound dispersing agent, activated nano-primary pulp containing naphthalene compound dispersing agent and preparation method of naphthalene compound dispersing agent |
| CN115612173B (en) * | 2022-11-09 | 2023-12-01 | 广东金发科技有限公司 | Sulfur dispersion liquid and preparation method and application thereof |
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| CN101143929B (en) * | 2007-09-06 | 2010-12-15 | 湖北德邦化工新材料有限公司 | High stable water chain alkyl silane emulsion and preparation method thereof |
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