CN111040218A - Rubber release agent and preparation method thereof - Google Patents
Rubber release agent and preparation method thereof Download PDFInfo
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
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- C08J2321/00—Characterised by the use of unspecified rubbers
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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
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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Abstract
The invention provides a rubber release agent and a preparation method thereof, wherein the rubber release agent comprises the following raw materials in parts by mass: 35-45 parts of zinc stearate; 25-35 parts of talcum powder; 3-5 parts of zinc oxide; 5-8 parts of white silicone oil; 2-5 parts of glycerol; 5-10 parts of a surfactant; 2-5 parts of biological enzyme; 2-3 parts of a dispersing agent; 1-2 parts of an anti-settling agent; 200-500 parts of water. According to the rubber isolation agent, zinc oxide and biological enzyme are added on the basis of zinc stearate and talcum powder, and a proper surfactant and other auxiliaries are combined, so that the stability of emulsion formed after mixing zinc stearate dispersion liquid and zinc oxide dispersion liquid can be improved, the heat conduction performance of rubber is accelerated, rubber sheets are not sticky after being stacked, and the rubber isolation agent has an excellent rubber isolation effect.
Description
Technical Field
The invention belongs to the technical field of rubber processing, and particularly relates to a rubber separant and a preparation method thereof.
Background
In the production and processing of rubber products, the rubber generates heat and has self-adhesiveness, so that the processing and transportation and external transportation are difficult, and particularly, the transportation and reprocessing of the rubber compound and the plasticated rubber are very troublesome. Therefore, before the rubber material is finally made into a finished product, such as before the rubber compound is transported, stored and transported, a layer of isolating agent is soaked on the corresponding rubber sheet in the processes of extrusion and between hot rubber mixing, and the characteristic that the difference between the mutual solubility of the isolating agent and the rubber is large is utilized to prevent or slow down the mutual adhesion between the rubber sheets.
According to the physical state, the currently used sizing separants are classified into powder separants, solid separants and liquid separants. The main components of the powder separant and the solid separant are fatty acid soaps prepared by saponifying animal fat, so that the powder separant and the solid separant are high in price, poor in isolation effect and large in influence on the performance of rubber materials. In addition, the powder type release agent and the solid type release agent can be dispersed in water only by heating, the surface of the film after adsorbing the release agent is smooth, the film is easy to slide after hanging the film, the production stagnation is caused, and the production efficiency is obviously reduced. The liquid is mainly a separant made of high-grade silicone oil, and although the separant has good separation effect, the cost is high. The aqueous suspension dispersant has great pollution to the film production area, and has the disadvantages of difficult preparation process, inconvenient transportation and inaccurate metering.
The release agent currently available on the market mainly contains aqueous zinc stearate as a main component, and the aqueous zinc stearate is a typical water-insoluble metal soap fatty acid salt, and is dispersed in a system in a particle state under the action of an aqueous auxiliary agent to exert its effect. For example, the rubber film release agent is prepared by zinc stearate, talcum powder and paraffin oil in the Chinese patent application with the publication number of CN 105199596A; CN103709428A is a water-soluble rubber separant prepared from zinc stearate or sodium stearate as main ingredient, and proper thickener, antisticking agent, vegetable oil and other adjuvants. However, in practical application, the dispersibility of the water-based zinc stearate is greatly influenced by the particle size, the water-based zinc stearate is not easy to disperse under the condition of large particle size, and the water-based zinc stearate is easy to precipitate in a system, so that the use effect is directly influenced, and the inconvenience in process operation and the water environment pollution are caused. Therefore, it is necessary to prepare a novel release agent having low cost, high performance and little environmental impact.
Disclosure of Invention
The invention aims to solve the problem that the existing zinc stearate rubber release agent is not easy to disperse, and provides a rubber release agent and a preparation method thereof.
The rubber release agent comprises the following raw materials in parts by mass:
35-45 parts of zinc stearate;
25-35 parts of talcum powder;
3-5 parts of zinc oxide;
5-8 parts of white silicone oil;
2-5 parts of glycerol;
5-10 parts of a surfactant;
2-5 parts of biological enzyme;
2-3 parts of a dispersing agent;
1-2 parts of an anti-settling agent;
200-500 parts of water.
Further, the zinc stearate has an average particle size of 0.06-0.08 mm and a density of 0.5-1.5 g/cm3。
Furthermore, the specific gravity of the talcum powder is 2.7-2.8, the fineness is 560-1250 meshes, and the Mohs hardness is 1-1.5.
Further, the zinc oxide has an average particle diameter of 200 to 300nm and a density of 5 to 6g/cm3The hardness is 4 to 5.
Further, the surfactant is a combination of a nonionic surfactant and an anionic surfactant.
Further, the mass ratio of the nonionic surfactant to the anionic surfactant is 1: (0.5 to 1), preferably 1: 0.6.
further, the nonionic surfactant is selected from polyoxyethylene alcohol type surfactant or polyol type surfactant, and specifically may be selected from any one of polyvinylpyrrolidone (PVP), sucrose fatty acid ester (SE), alkyl glycoside (APG), fatty alcohol polyoxyethylene ether (peregal), alkylphenol polyoxyethylene ether (such as TX-n, OP-n, NP-n, etc.), fatty acid polyglycol ester, polyol ester, sorbitan ester (Span-n), glycerol monostearate, and polyol ester polyoxyethylene ether (Ninol). The nonionic surfactant has the characteristics of weak water solubility and strong organic property.
Further, the anionic surfactant is any one of calcium dodecyl benzene sulfonate, α sulfomonocarboxylic acid, alkylbenzene sulfonate, α -olefin sulfonate, alkyl sulfonate, α -sulfomonocarboxylic acid ester, fatty acid sulfoalkyl ester and succinate sulfonate.
Further, the dispersing agent is at least one selected from fatty acid dispersing agents, fatty amide dispersing agents and ester dispersing agents, and the dispersing agents have good wetting dispersing and compatibilization effects in the zinc stearate emulsion system.
Further, the anti-settling agent is selected from titanate coupling agents, and the substances can introduce-SO3H and other groups can increase the thixotropy of organic or inorganic matters and improve the anti-settling capacity.
The preparation method of the rubber release agent provided by the invention comprises the following steps:
(1) uniformly mixing zinc stearate, talcum powder, white silicone oil, a dispersing agent and water to obtain a zinc stearate dispersion liquid;
(2) dispersing zinc oxide in water, adding a dispersing agent, and uniformly mixing to obtain a zinc oxide dispersion liquid;
(3) adding the zinc stearate dispersion liquid into the zinc oxide dispersion liquid, and mixing for 1-2 h at the temperature of 80-130 ℃; and then cooling to 40 ℃ or below, adding the biological enzyme, the anti-settling agent and the surfactant, uniformly mixing, and standing to obtain the rubber separant.
Further, the standing time in the step (3) is 1-2 h.
Compared with the prior art, the rubber separant disclosed by the invention has the advantages that zinc oxide is added on the basis of zinc stearate and mixed at the temperature of 80-130 ℃, so that the stiffness of rubber can be enhanced, and the heat dissipation of rubber materials is facilitated; the biological enzyme is added for catalysis, so that the dispersion performance of the zinc stearate can be effectively improved, and meanwhile, when the rubber separant is coated on a rubber material, the heat conduction performance of the rubber can be accelerated. Meanwhile, in the invention, a single emulsifier or other surfactants can not meet the use requirements of the release agent, and white silicone oil is used as a main emulsifier, and proper nonionic surfactant, anionic surfactant, proper dispersant and anti-settling agent are added, so that the surface tension of two liquids, namely zinc stearate dispersion liquid and zinc oxide dispersion liquid, can be reduced, and the stability of an emulsion formed by mixing the zinc stearate dispersion liquid and the zinc oxide dispersion liquid is improved.
Based on the mechanism and combined with practical verification, the rubber separant prepared by the invention is emulsion, has the characteristics of strong organic property and strong water solubility, does not form a film when exposed in the air, has low viscosity, and has good mechanical and chemical stability; meanwhile, the product is non-toxic, free from peculiar smell, environment-friendly, and ideal in sensitivity enhancement and lubrication effects, and is expected to be applied to a release agent and a vulcanization activator besides being used as a rubber separant.
Drawings
FIG. 1 is a photograph of a rubber sheet treated with the rubber release agent of example 1;
FIG. 2 is a photograph of a rubber sheet treated with the rubber release agent of example 2;
FIG. 3 is a photograph of a rubber sheet treated with the rubber release agent of example 3.
Detailed Description
The invention prepares the rubber separant with good dispersion performance, strong organic property, strong water solubility and ideal separation and lubrication effects by adding zinc oxide, talcum powder and biological enzyme into zinc stearate and assisting proper white silicone oil, surfactant, anti-settling agent and the like.
The rubber release agent comprises the following raw materials in parts by mass:
35-45 parts of zinc stearate;
25-35 parts of talcum powder;
3-5 parts of zinc oxide;
5-8 parts of white silicone oil;
2-5 parts of glycerol;
5-10 parts of a surfactant;
2-5 parts of biological enzyme;
2-3 parts of a dispersing agent;
1-2 parts of an anti-settling agent.
The preparation method comprises the following steps:
(1) uniformly mixing zinc stearate, talcum powder, white silicone oil, a dispersing agent and water to obtain a zinc stearate dispersion liquid;
(2) dispersing zinc oxide in water, adding a dispersing agent, and uniformly mixing to obtain a zinc oxide dispersion liquid;
(3) adding the zinc stearate dispersion liquid into the zinc oxide dispersion liquid, and mixing for 1-2 h at the temperature of 80-130 ℃; and then cooling to 40 ℃ or below, adding the biological enzyme, the anti-settling agent and the surfactant, uniformly mixing, and standing to obtain the rubber separant.
The technical solution of the present invention will be described in detail with reference to specific examples.
Example 1
The rubber release agent of the embodiment comprises the following raw materials in parts by mass:
45 parts of zinc stearate;
35 parts of talcum powder;
5 parts of zinc oxide;
8 parts of white silicone oil;
5 parts of glycerol;
10 parts of a surfactant;
5 parts of biological enzyme;
3 parts of a dispersing agent;
2 parts of an anti-settling agent;
500 parts of water.
Wherein the zinc stearate has an average particle size of 0.06-0.08 mm and a density of 0.5-1.5 g/cm3In the practical experiment, the zinc stearate used in the invention has the particle size of 0.075mm and the density of 1.095g/cm3(ii) a The talcum powder has the specific gravity of 2.7-2.8, the fineness of 560-1250 meshes and the Mohs hardness of 1-1.5; the zinc oxide has an average particle size of 200 to 300nm and a density of 5.606g/cm3The hardness was 4.5.
The surfactant comprises a nonionic surfactant and an anionic surfactant in a mass ratio of 1: 0.6, wherein the nonionic surfactant is selected from any one of polyvinylpyrrolidone (PVP), sucrose fatty acid ester (SE), alkyl glycoside (APG), fatty alcohol polyoxyethylene ether (peregal), alkylphenol polyoxyethylene ether (such as TX-n, OP-n, NP-n and the like), fatty acid polyglycol ester, polyol ester, sorbitan ester (Span-n), glycerol monostearate and polyol ester polyoxyethylene ether (Ninol), and the anionic surfactant is selected from any one of calcium dodecylbenzene sulfonate, α sulfomonocarboxylic acid, alkylbenzene sulfonate, α -olefin sulfonate, alkyl sulfonate, α -sulfomonocarboxylic acid ester, fatty acid sulfoalkyl ester and succinate sulfonate.
The preparation method of the rubber release agent comprises the following steps:
(1) and uniformly mixing zinc stearate, talcum powder, white silicone oil, a dispersing agent and water to obtain the zinc stearate dispersion liquid.
Specifically, 45 parts of powdery zinc stearate, 35 parts of powdery talcum powder, 4 parts of white silicone oil and 150 parts of deionized water are mixed, and stirred for 1 hour at the temperature of 60-80 ℃ for pre-dispersion. Then, 150 parts of deionized water, the rest 4 parts of white silicone oil and 1.5 parts of dispersing agent are added, and stirring and dispersing are continued for 20-30 min to form uniform zinc stearate dispersion liquid.
(2) Dispersing zinc oxide in water, adding a dispersing agent, and uniformly mixing to obtain a zinc oxide dispersion liquid.
Specifically, 5 parts of zinc oxide, 200 parts of water and 1.5 parts of a dispersant were uniformly mixed to obtain a zinc oxide dispersion.
(3) Adding the zinc stearate dispersion liquid into the zinc oxide dispersion liquid, and mixing for 1-2 h at the temperature of 80-130 ℃; and then cooling to 40 ℃ or below, adding the biological enzyme, the anti-settling agent and the surfactant, uniformly mixing, and standing to obtain the rubber separant.
Specifically, adding the zinc stearate dispersion liquid obtained in the step (1) into the zinc oxide dispersion liquid obtained in the step (2), mixing for 2 hours at 80-130 ℃, adding 5 parts of biological enzyme, 2 parts of anti-settling agent and 10 parts of surfactant when the temperature is reduced to 40 ℃, uniformly stirring, and standing for 1 hour to obtain the rubber separant.
The physical and chemical properties of the rubber release agent of the embodiment are as follows:
(1) appearance of the product
The rubber release agent of this example was a white, aqueous solution type slurry suspension.
(2) Water solubility
10g of the rubber release agent of this example was added to 90g of distilled water, and the rubber release agent was immediately dispersed and dissolved in water after shaking to form a uniform system.
(3) Isolation Properties of rubber
The rubber release agent of the embodiment is dissolved in normal temperature water and stirred uniformly. And (3) taking 9 rubber sheets, soaking the rubber sheets in the aqueous solution of the rubber release agent for 10-15 s, and taking out. Then the hanger is dried by blowing, and is collected after standing and cooling, and finally 9 rubber sheets are stacked and flattened by a weight of 10Kg for carrying out the stickiness test.
An additional equivalent amount of a commercially available rubber release agent (e.g., powdered hydrotalcite, or fatty acid soap in bulk) was used for the tack test in the same manner and the results are shown in Table 1.
TABLE 1 tack test results for rubber release agent
| Time of day | 24h | 48h | 72h |
| Commercial rubber release agent | Is not sticky | Stickiness | Stickiness |
| This example rubber release agent | Is not sticky | Is not sticky | Is not sticky |
The result of the stickiness test shows that the rubber sheet is sticky after the commercially available rubber release agent is flattened by a weight for 48 hours, but the rubber release agent of the embodiment still does not have the sticky phenomenon after being flattened for 72 hours, which indicates that the rubber release agent of the embodiment has a good separation effect on the rubber sheet, mainly because the rubber release agent of the embodiment uses the biological enzyme, and after the rubber sheet is immersed into the rubber release agent aqueous solution, the biological enzyme enhances the stiffness of the rubber sheet and catalyzes the heat conduction performance in the rubber, so that the stacked rubber sheets can quickly dissipate heat under the condition of heavy pressure, and thus the stickiness is avoided.
Further, the rubber sheet after being soaked with the rubber release agent of this example and subjected to the tack test is shown in FIG. 1. The rubber sheet used in this example was pink in color and was somewhat whitish after treatment, probably because the rubber release agent promoted the vulcanization to some extent.
(4) Influence on the properties of the rubber sheet
The rubber sheets impregnated with the general rubber release agent and the rubber release agent of this example were tested for mechanical properties such as tear strength and tensile strength, and the results are shown in table 2 below.
TABLE 2 results of physical property test of rubber sheets soaked with rubber release agent
From the test results in Table 2, it is found that the rubber release agent of the present example has slightly improved mechanical properties such as tear strength, tensile strength and elongation of the rubber sheet pair and improved yellowing resistance as compared with the general rubber release agent.
Example 2
The rubber release agent of the embodiment comprises the following raw materials in parts by mass:
35 parts of zinc stearate;
25 parts of talcum powder;
3 parts of zinc oxide;
5 parts of white silicone oil;
2 parts of glycerol;
5 parts of a surfactant;
2 parts of biological enzyme;
2 parts of a dispersing agent;
1 part of anti-settling agent;
200 parts of water.
Wherein the zinc stearate has particle diameter of 0.075mm and density of 1.095g/cm3(ii) a The talcum powder has the specific gravity of 2.7-2.8, the fineness of 560-1250 meshes and the Mohs hardness of 1-1.5; the zinc oxide has an average particle size of 200 to 300nm and a density of 5.606g/cm3The hardness was 4.5.
The comprehensive surfactant comprises a nonionic surfactant and an anionic surfactant in a mass ratio of 1: 0.6, wherein the nonionic surfactant is selected from any one of polyvinylpyrrolidone (PVP), sucrose fatty acid ester (SE), alkyl glycoside (APG), fatty alcohol polyoxyethylene ether (peregal), alkylphenol polyoxyethylene ether (such as TX-n, OP-n, NP-n and the like), fatty acid polyglycol ester, polyol ester, sorbitan ester (Span-n), glycerol monostearate and polyol ester polyoxyethylene ether (Ninol), and the anionic surfactant is selected from any one of calcium dodecyl benzene sulfonate, α sulfomonocarboxylic acid, alkylbenzene sulfonate, α -olefin sulfonate, alkyl sulfonate, α -sulfomonocarboxylic acid ester, fatty acid alkyl sulfonate and succinate sulfonate.
The preparation method of the rubber release agent comprises the following steps:
(1) mixing 35 parts of powdery zinc stearate, 25 parts of powdery talcum powder, 2.5 parts of white silicone oil and 50 parts of deionized water, and stirring for 1 hour at the temperature of 60-80 ℃ for pre-dispersion. And then adding 50 parts of deionized water, the rest 2.5 parts of white silicone oil and 1 part of dispersing agent, and continuously stirring and dispersing for 20-30 min to form uniform zinc stearate dispersion liquid.
(2) Pouring 100 parts of water into a mixing barrel, adding 1 part of dispersing agent and 3 parts of zinc oxide, and uniformly mixing to obtain zinc oxide dispersion.
(3) And (3) adding the zinc stearate dispersion liquid obtained in the step (1) into the zinc oxide dispersion liquid obtained in the step (2), mixing for 2 hours at the temperature of 80-130 ℃, adding 2 parts of biological enzyme and 1 part of anti-settling agent when the temperature is reduced to 40 ℃, uniformly stirring, and standing for 1 hour to obtain the rubber separant.
The rubber release agent of this example was still a white, aqueous solution type slurry emulsion. 10g of the rubber release agent of this example was added to 90g of distilled water, and the rubber release agent was immediately dispersed and dissolved in water after shaking to form a uniform system.
The same tack test method as in example 1 was used, and the results show that the rubber release agent of this example still maintains good release effect after 72 hours of heavy pressing and is not tacky.
The rubber sheet impregnated with the rubber release agent of the present example was tested for mechanical properties such as tear strength and tensile strength, and the results are shown in table 3 below.
TABLE 3 physical Properties of rubber sheets soaked with rubber separant test results
From the test results in table 3, it can be seen that the rubber sheet soaked with the rubber release agent of the present embodiment still has good tear strength, tensile strength, elongation and yellowing resistance.
In addition, the rubber sheet soaked with the rubber release agent of the present example and subjected to the tack test showed that the rubber sheet was treated to be whitened in a large area and the pink color became remarkably lighter, which accelerated the vulcanization of the rubber compared to example 1, as shown in fig. 2.
Example 3
The rubber release agent of the embodiment comprises the following raw materials in parts by mass:
40 parts of zinc stearate;
30 parts of talcum powder;
4 parts of zinc oxide;
6 parts of white silicone oil;
4 parts of glycerol;
8 parts of a surfactant;
3 parts of biological enzyme;
2 parts of a dispersing agent;
1 part of anti-settling agent;
and 400 parts of water.
The preparation method comprises the following steps:
(1) mixing 40 parts of powdery zinc stearate, 30 parts of powdery talcum powder, 3 parts of white silicone oil and 100 parts of deionized water, and stirring for 1 hour at the temperature of 60-80 ℃ for pre-dispersion. And then adding 100 parts of deionized water, the rest 3 parts of white silicone oil and 1 part of dispersing agent, and continuously stirring and dispersing for 20-30 min to form uniform zinc stearate dispersion liquid.
(2) And pouring 200 parts of water into a mixing barrel, adding 1 part of dispersing agent and 4 parts of zinc oxide, and uniformly mixing to obtain a zinc oxide dispersion liquid.
(3) And (3) adding the zinc stearate dispersion liquid obtained in the step (1) into the zinc oxide dispersion liquid obtained in the step (2), mixing for 2 hours at the temperature of 80-130 ℃, adding 3 parts of biological enzyme and 1 part of anti-settling agent when the temperature is reduced to 40 ℃, uniformly stirring, and standing for 1 hour to obtain the rubber separant.
The rubber release agent of this example was still a white, aqueous solution type slurry emulsion. 10g of the rubber release agent of this example was added to 90g of distilled water, and the rubber release agent was immediately dispersed and dissolved in water after shaking to form a uniform system.
The same tack test method as in example 1 was used, and the results show that the rubber release agent of this example still maintains good release effect after 72 hours of heavy pressing and is not tacky.
The rubber sheet impregnated with the rubber release agent of the present example was tested for mechanical properties such as tear strength and tensile strength, and the results are shown in table 4 below.
TABLE 4 measurement of physical Properties of rubber sheets dipped in rubber separant
From the test results in table 4, it can be seen that the rubber sheet soaked with the rubber release agent of the present embodiment still has good tear strength, tensile strength, elongation and yellowing resistance.
In addition, as shown in fig. 3, the rubber sheet soaked with the rubber release agent of the embodiment and subjected to the tack test has lighter color and less whitening degree than that of the rubber sheet of the embodiment 2 after being treated, probably because the amount of each raw material is increased compared with that of the embodiment 2, thereby slowing down the vulcanization of the rubber sheet.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. A rubber release agent is characterized in that: the composite material comprises the following raw materials in parts by mass:
35-45 parts of zinc stearate;
25-35 parts of talcum powder;
3-5 parts of zinc oxide;
5-8 parts of white silicone oil;
2-5 parts of glycerol;
5-10 parts of a surfactant;
2-5 parts of biological enzyme;
2-3 parts of a dispersing agent;
1-2 parts of an anti-settling agent;
200-500 parts of water.
2. The rubber release agent according to claim 1, wherein: the zinc stearate has an average particle size of 0.06-0.08 mm and a density of 0.5-1.5 g/cm3。
3. The rubber release agent according to claim 1, wherein: the talcum powder has the specific gravity of 2.7-2.8 and the fineness of 560-1250 meshes.
4. The rubber release agent according to claim 1, wherein: the zinc oxide has an average particle diameter of 200 to 300nm and a density of5～6g/cm3。
5. The rubber release agent according to claim 1, wherein: the surfactant is a combination of a nonionic surfactant and an anionic surfactant.
6. The rubber release agent according to claim 5, wherein: the mass ratio of the nonionic surfactant to the anionic surfactant is 1: (0.5 to 1).
7. The rubber release agent according to claim 6, wherein: the nonionic surfactant is selected from polyoxyethylene alcohol type surfactant or polyhydric alcohol type surfactant.
8. The rubber release agent according to claim 7, wherein: the nonionic surfactant is selected from any one of polyvinylpyrrolidone, sucrose fatty acid ester, alkyl glycoside, fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, fatty acid polyglycol ester, polyol ester, sorbitan ester, glycerol monostearate and polyol ester polyoxyethylene ether.
9. The release agent according to claim 6, wherein the anionic surfactant is selected from the group consisting of calcium dodecylbenzenesulfonate, α sulfomonocarboxylic acid, alkylbenzenesulfonate, α -olefin sulfonate, alkylsulfonate, α -sulfomonocarboxylic acid ester, fatty acid sulfoalkyl ester, and succinate sulfonate.
10. A method for preparing the rubber release agent according to any one of claims 1 to 9, which is characterized in that: the method comprises the following steps:
(1) uniformly mixing zinc stearate, talcum powder, white silicone oil, a dispersing agent and water to obtain a zinc stearate dispersion liquid;
(2) dispersing zinc oxide in water, adding a dispersing agent, and uniformly mixing to obtain a zinc oxide dispersion liquid;
(3) adding the zinc stearate dispersion liquid into the zinc oxide dispersion liquid, and mixing for 1-2 h at the temperature of 80-130 ℃; and then cooling to 40 ℃ or below, adding the biological enzyme, the anti-settling agent and the surfactant, uniformly mixing, and standing to obtain the rubber separant.
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| CN201911404504.9A Pending CN111040218A (en) | 2019-12-31 | 2019-12-31 | Rubber release agent and preparation method thereof |
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Application publication date: 20200421 |