Environment-friendly separant as well as preparation method and application thereof
By covalently grafting pyridine-modified polyvinyl alcohol with a modifier, benzotriazole groups are introduced to form strong coordination and hydrogen bonding with the surface of nano-calcium carbonate, solving the problems of poor adhesion and dispersibility of existing release agents in rubber processing, and achieving a dense, tough release coating with easy peeling effect.
Patent Information
- Application Number
- CN202511893832.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-16
- Publication Date
- 2026-02-27
AI Technical Summary
Existing release agents have problems such as poor adhesion, easy detachment, environmental pollution, and impact on coating and self-adhesion in rubber processing. They also have problems such as high film brittleness and poor filler dispersibility.
An environmentally friendly isolating agent is prepared by covalently grafting pyridinized polyvinyl alcohol with a modifier to introduce benzotriazole groups that form strong coordination and hydrogen bonding with the surface of nano-calcium carbonate, combined with flexible molecular chain segments.
Uniform dispersion of nano-calcium carbonate is achieved, enhancing interfacial bonding and forming a dense and tough protective coating that is easy to peel off without leaving residue, thus improving storage stability and ease of use.
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Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of release agents, and particularly relates to an environment-friendly release agent and a preparation method and application thereof. BACKGROUND
[0002] Release agents play a key role in the processing of high polymer materials such as rubber, and are mainly used to prevent the adhesion of the material surface, facilitate storage, transportation and subsequent process treatment. For example, in the production process of rubber products such as tires, the unvulcanized rubber or rubber sheet often needs to be stacked, stored and transported in multiple layers, and the anti-adhesion treatment of the surface is particularly important.
[0003] Traditional release agents mostly use inorganic powders such as talc powder and mica powder, or organic silicon and fatty acid salts. These materials have certain release effect, but still have obvious limitations: the adhesion of inorganic powders on the rubber surface is poor, and they are easy to fall off and produce dust, which not only pollutes the environment and affects the cleanliness of the workshop, but also may introduce impurity defects in the production of precise parts such as tires; the organic release agent of silicone oil is easy to migrate, which often interferes with the subsequent self-adhesion of rubber, the adhesion with skeleton materials such as cords, or affects the surface coating, and some systems containing solvents also have the problem of volatile organic compound (VOC) emission, which does not meet the trend of green production. In recent years, environment-friendly release agents based on water-soluble polyvinyl alcohol have attracted attention, but the film formed by them is brittle, firmly adheres to the rubber surface but is difficult to peel off, and often needs to rely on a large amount of external additives to improve it, which may lead to the decrease of the cohesive force of the coating, the easy damage or the uneven performance. In addition, the inorganic fillers introduced to enhance the performance of the coating have poor dispersibility in the polyvinyl alcohol matrix and are easy to agglomerate to form defect points, which affects the overall performance and reliability of the coating.
[0004] Therefore, it is still an important and urgent technical task in the field of rubber processing to develop a water-based environment-friendly release agent that has good film-forming property, firm adhesion to rubber, easy peeling, and can realize uniform and stable dispersion of fillers. SUMMARY
[0005] The present application aims to overcome the defects of the prior art, and provides an environment-friendly release agent and a preparation method and application thereof.
[0006] The object of the present application can be achieved by the following technical solutions: On the one hand, the present application provides a preparation method of an environment-friendly release agent, comprising the following processes: Step 1: mixing polyvinyl alcohol, 4-formaldehyde pyridine and deionized water, increasing the temperature to 80-90℃, reacting for 1-2h, adjusting the pH to 8 after the reaction is completed, and post-treating to obtain pyridylated polyvinyl alcohol; Step 2: mix the pyridylated polyvinyl alcohol, N,N-dimethylformamide, modifier, and raise the temperature to 90-100°C, react for 3-4h, after the reaction is completed, cool to room temperature, filter, wash, and dry to obtain the modified polyvinyl alcohol powder; Step 3: add the modified polyvinyl alcohol powder, nano calcium carbonate, and polyethylene glycol into a high-speed mixer, dry mix at room temperature for 5-10min, then slowly add glycerol and deionized water, continue to mix, and then send into a twin-screw extruder, extrude and granulate, and vacuum dry to obtain the environmentally friendly release agent.
[0007] More preferably, the raw materials for preparing the pyridylated polyvinyl alcohol include the following components: 10-12 parts of polyvinyl alcohol, 2-3 parts of 4-formaldehyde pyridine, and 100-120 parts of deionized water.
[0008] More preferably, the raw materials for preparing the modified polyvinyl alcohol powder include the following components: 10-12 parts of pyridylated polyvinyl alcohol, 80-100 parts of N,N-dimethylformamide, and 3-5 parts of a modifier.
[0009] More preferably, the raw materials for preparing the environmentally friendly release agent include the following components: 60-80 parts of modified polyvinyl alcohol powder, 30-50 parts of nano calcium carbonate, 8-12 parts of polyethylene glycol, 3-5 parts of glycerol, and 20-40 parts of deionized water.
[0010] More preferably, the preparation process of the modifier is as follows: S1: add 2-nitroaniline into deionized water, add dilute hydrochloric acid, stir for 10-15min under ice bath conditions, then slowly drop sodium nitrite aqueous solution, continue to stir for 30-40min, add urea to remove excess sodium nitrite, filter, and then slowly drop the obtained liquid into a resorcinol solution, keep at 0-5°C, react for 3-4h, recrystallize, and obtain intermediate 1; S2: mix intermediate 1 with anhydrous ethanol, add sodium hydroxide solution, raise the temperature to 80-90°C, reflux for 1-2h, then add thiourea dioxide, continue to react for 40-50min, filter, wash, and dry to obtain intermediate 2; S3: mix intermediate 2, 1-bromo-6-chloropentane, potassium carbonate, and chloroform, stir uniformly, raise the temperature to 80-90°C, reflux for 6-8h, after the reaction is completed, cool to room temperature, and post-treat to obtain the modifier.
[0011] In the scheme, first, the hydroxyl group on the polyvinyl alcohol molecular chain is reacted with 4-formaldehyde pyridine by step 1 to introduce a reactive pyridine group on the polyvinyl alcohol skeleton to obtain pyridine-modified polyvinyl alcohol; simultaneously, by S1 and S2, 2-nitroaniline is used as a starting material, and an intermediate 1 is generated through diazotization and coupling reaction, and then under alkaline conditions, an intermediate 2 is formed by reaction and formation of a benzotriazole ring with hydrosulfite as a reducing agent; then, in S3, the hydroxyl group of the intermediate 2 is reacted with 1-bromo-6-chloropentane to generate a long-chain modifier with one end being halogen and the other end being a benzotriazole ring; finally, in step 2, the pyridine group contained in the pyridine-modified polyvinyl alcohol prepared in the foregoing is subjected to nucleophilic substitution reaction with the halogen at the end of the modifier, and the aniline derivative structure is grafted onto the polyvinyl alcohol molecular chain by a covalent bond through a flexible long chain, so that a modified polyvinyl alcohol powder with good film-forming property and surface activity is obtained.
[0012] The structure of the modifier is as follows:
[0013] More preferably, the preparation raw material of the intermediate 1 comprises the following components: 10-12 parts of 2-nitroaniline, 80-120 parts of deionized water, 15-25 parts of dilute hydrochloric acid, 8-9 parts of sodium nitrite aqueous solution, 30-40 parts of m-dihydroxybenzene solution, by weight fraction; wherein the concentration of the sodium nitrite aqueous solution is 25wt%, the concentration of the m-dihydroxybenzene solution is 15wt%, and the concentration of the dilute hydrochloric acid is 10wt%.
[0014] More preferably, the preparation raw material of the intermediate 2 comprises the following components: 10-12 parts of the intermediate 1, 80-100 parts of anhydrous ethanol, 20-30 parts of sodium hydroxide solution, and 8-10 parts of sulfur dioxide; wherein the concentration of the sodium hydroxide solution is 25wt%.
[0015] More preferably, the preparation raw material of the modifier comprises the following components: 10-12 parts of the intermediate 2, 10-12 parts of 1-bromo-6-chloropentane, 12-15 parts of potassium carbonate, and 80-100 parts of chloroform.
[0016] On the other hand, the application provides an application of the environment-friendly release agent in a rubber release agent.
[0017] The beneficial effects of the application are as follows: The environmental protection release agent provided by the application is suitable for solving the problem of adhesion of rubber products during the stacking and storage of green rubber sheets in the production process. The benzotriazole groups introduced by covalent grafting can produce strong coordination and hydrogen bonding with the surface of nano calcium carbonate fillers, enhancing the interfacial interaction. This effect not only realizes the uniform dispersion of nano calcium carbonate, but also significantly enhances the interfacial bonding force between the filler and the matrix, making the finally formed release coating more dense and strong. It ensures that the coating does not break when stacked and pressed, so that it can be completely peeled off and has no residue when separated. At the same time, the flexible molecular chain segments enriched on the surface of the coating form a weak interfacial layer, so that the interaction force between the coating layers of the stacked rubber sheets is extremely low, and the peeling resistance is extremely small, so that they can be easily separated and completely adhesion-free.
[0018] In addition, the release agent is in the form of granules after granulation, has good storage stability and use convenience, and is more suitable for the needs of industrial production. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.
[0020] Embodiment one: a preparation method of an environmental protection release agent, comprising the following processes: Step 1: mix 10 parts of polyvinyl alcohol, 2 parts of 4-formaldehyde pyridine and 100 parts of deionized water, raise the temperature to 80 DEG C, and react for 1 hour. After the reaction is completed, adjust the pH to 8, and post-treat to obtain pyridylated polyvinyl alcohol; Step 2: mix 10 parts of pyridylated polyvinyl alcohol, 80 parts of N,N-dimethylformamide and 3 parts of a modifier, raise the temperature to 90 DEG C, and react for 3 hours. After the reaction is completed, cool to room temperature, filter, wash and dry to obtain modified polyvinyl alcohol powder; Step 3: add 60 parts of modified polyvinyl alcohol powder, 30 parts of nano calcium carbonate and 8 parts of polyethylene glycol into a high-speed mixer, dry mix for 5-10 minutes at room temperature, then slowly add 3 parts of glycerol and 20 parts of deionized water, continue to mix, and then send into a twin-screw extruder, extrude and granulate, and vacuum dry to obtain the environmental protection release agent; The preparation process of the modifier is as follows: S1: 10 parts of 2-nitroaniline were added to 80 parts of deionized water, 15 parts of dilute hydrochloric acid (concentration of 10 wt%) were added, stirred under ice bath conditions for 10 min, then 8 parts of sodium nitrite aqueous solution (concentration of 25 wt%) were slowly added dropwise, and stirring was continued for 30 min. Urea was added to remove excess sodium nitrite, and after filtration, the obtained liquid was slowly added dropwise into 30 parts of a resorcinol solution (15 wt%), and the reaction was maintained at 0°C for 3 h. After recrystallization, intermediate 1 was obtained; S2: 10 parts of intermediate 1 were mixed with 80 parts of anhydrous ethanol, 20 parts of sodium hydroxide solution (concentration of 25 wt%) were added, the temperature was raised to 80°C, and the reaction was refluxed for 1 h. Then 8 parts of sulfourea dioxide were added, and the reaction was continued for 40 min. After filtration, washing, and drying, intermediate 2 was obtained. S3: 10 parts of intermediate 2, 10 parts of 1-bromo-6-chloropentane, and 12 parts of potassium carbonate were mixed with 80 parts of chloroform. The temperature was raised to 80°C, and the reaction was refluxed for 6 h. After the reaction was completed, the temperature was cooled to room temperature, and the product was obtained after post-processing.
[0021] Example Two: A preparation method of an environmentally friendly release agent, comprising the following processes: Step 1: 12 parts of polyvinyl alcohol, 3 parts of 4-formaldehyde pyridine, and 120 parts of deionized water were mixed, and the temperature was raised to 90°C. The reaction was carried out for 2 h. After the reaction was completed, the pH was adjusted to 8, and the product was obtained after post-processing. Step 2: 12 parts of pyridylated polyvinyl alcohol, 100 parts of N,N-dimethylformamide, and 5 parts of the modifier were mixed, and the temperature was raised to 100°C. The reaction was carried out for 4 h. After the reaction was completed, the temperature was cooled to room temperature, and the product was obtained after filtration, washing, and drying. Step 3: 80 parts of modified polyvinyl alcohol powder, 50 parts of nano calcium carbonate, and 12 parts of polyethylene glycol were added to a high-speed mixer, and dry mixing was carried out at room temperature for 5-10 min. Then 5 parts of glycerol and 40 parts of deionized water were slowly added, and mixing was continued. The product was obtained after being sent into a twin-screw extruder, extrusion granulation, and vacuum drying. The preparation process of the modifier is as follows: S1: 12 parts of 2-nitroaniline were added to 120 parts of deionized water, 25 parts of dilute hydrochloric acid (concentration of 10 wt%) were added, and stirring was carried out under ice bath conditions for 15 min. Then 9 parts of sodium nitrite aqueous solution (concentration of 25 wt%) were slowly added dropwise, and stirring was continued for 40 min. Urea was added to remove excess sodium nitrite, and after filtration, the obtained liquid was slowly added dropwise into 40 parts of a resorcinol solution (15 wt%), and the reaction was maintained at 5°C for 4 h. After recrystallization, intermediate 1 was obtained. S2: 12 parts of intermediate 1 were mixed with 100 parts of absolute ethanol, 30 parts of sodium hydroxide solution (25 wt% concentration) were added, the temperature was raised to 90°C, and the reaction was refluxed for 2 h, then 10 parts of sulfourea dioxide were added, and the reaction was continued for 50 min, filtered, washed, and dried to obtain intermediate 2; S3: 12 parts of intermediate 2, 12 parts of 1-bromo-6-chloropentane, 15 parts of potassium carbonate, and 100 parts of chloroform were mixed, the temperature was raised to 90°C, and the reaction was refluxed for 8 h, after the reaction was completed, the temperature was cooled to room temperature, and the product was obtained after post-processing.
[0022] Example Three: A preparation method of an environmentally friendly release agent, comprising the following processes: Step 1: 11 parts of polyvinyl alcohol, 2.5 parts of 4-formaldehyde pyridine, and 110 parts of deionized water were mixed, the temperature was raised to 85°C, and the reaction was carried out for 1.5 h, after the reaction was completed, the pH was adjusted to 8, and the product was obtained after post-processing; Step 2: 11 parts of pyridylated polyvinyl alcohol, 90 parts of N,N-dimethylformamide, and 4 parts of the modifier were mixed, the temperature was raised to 95°C, and the reaction was carried out for 3.5 h, after the reaction was completed, the temperature was cooled to room temperature, and the product was obtained after filtration, washing, and drying; Step 3: 70 parts of modified polyvinyl alcohol powder, 40 parts of nano calcium carbonate, and 10 parts of polyethylene glycol were added to a high-speed mixer, dry mixed at room temperature for 5-10 min, then 4 parts of glycerol and 30 parts of deionized water were slowly added, and the mixture was continuously mixed, then the mixture was sent into a twin-screw extruder, extruded and granulated, and vacuum dried to obtain the environmentally friendly release agent; The preparation process of the modifier is as follows: S1: 11 parts of 2-nitroaniline were added to 100 parts of deionized water, 20 parts of dilute hydrochloric acid (10 wt% concentration) were added, and the mixture was stirred in an ice bath for 12.5 min, then 8.5 parts of sodium nitrite aqueous solution (25 wt% concentration) were slowly added dropwise, the stirring was continued for 35 min, urea was added to remove excess sodium nitrite, the mixture was filtered, and the obtained liquid was slowly added dropwise into 35 parts of resorcinol solution (15 wt%), the temperature was maintained at 2.5°C, the reaction was carried out for 3.5 h, and the product was obtained after recrystallization; S2: 11 parts of intermediate 1 were mixed with 90 parts of absolute ethanol, 25 parts of sodium hydroxide solution (25 wt% concentration) were added, the temperature was raised to 85°C, and the reaction was refluxed for 1.5 h, then 9 parts of sulfourea dioxide were added, and the reaction was continued for 45 min, the product was obtained after filtration, washing, and drying; S3: 11 parts of intermediate 2, 11 parts of 1-bromo-6-chloropentane, 13.5 parts of potassium carbonate, and 90 parts of chloroform were mixed, the temperature was raised to 85°C, and the reaction was refluxed for 7 h, after the reaction was completed, the temperature was cooled to room temperature, and the product was obtained after post-processing.
[0023] Comparative Example 1: The polyvinyl alcohol is not modified, and the details are as follows: 70 parts of polyvinyl alcohol powder, 40 parts of nano calcium carbonate, and 10 parts of polyethylene glycol are added to a high-speed mixer, dry mixed at room temperature for 5-10 min, then 4 parts of glycerol and 30 parts of deionized water are slowly added, continue to mix, and then send into a double screw extruder, extrude and granulate, vacuum drying, to obtain the environment-friendly release agent.
[0024] Detection experiment: (1) The release agents obtained in the examples and comparative examples are dissolved in deionized water at a concentration of 10wt%, stirred uniformly to prepare a release agent aqueous solution; the release agent aqueous solution is uniformly coated on the surface of a natural rubber sheet by spraying (coating amount: 20g / m 2 ), dried in a 60℃ oven for 30min to obtain a rubber test piece coated with a release film (film thickness 15-20μm); (2) Take two coated test pieces of the same formula, stack them face to face, and place them on a flat vulcanizing machine, apply a pressure of 0.5MPa, and keep them in a constant temperature environment at 70℃ for 24h; (3) Cool the stacked test pieces to room temperature (25℃), fix them on the upper and lower clamps of a tensile testing machine, and perform a peeling test at a stretching rate of 50mm / min, record the average peeling force (N / 25mm) during the peeling process, and observe whether there is any adhesion residue on the surface of the test piece; Among them, the blank control group is a natural rubber sheet without any release agent coating; The obtained data are shown in the following table:
[0025] Conclusion: The environment-friendly release agent described in the application significantly improves its release performance on the surface of rubber through molecular structure design and process optimization. The release agents prepared in Examples 1-3 all exhibit excellent low peeling force (≤0.5N / 25mm) and no surface adhesion residue in the peeling force test, indicating that they can effectively form a continuous, stable and easily peeled release film on the surface of rubber.
[0026] In contrast, the average peeling force of Comparative Example 1 (polyvinyl alcohol is not modified) increases to 3.5 N / 25 mm, and obvious adhesion occurs, and the release performance is significantly reduced. The main reason for the performance decline is that the unmodified polyvinyl alcohol lacks active structures such as benzotriazole groups and cannot form strong coordination and hydrogen bonding with the surface of nano calcium carbonate, resulting in uneven dispersion of fillers in the matrix, weak interfacial bonding, and insufficient density and adhesion of the coating. At the same time, the ordinary polyvinyl alcohol molecular chain lacks flexible grafting segments and surface active groups, affecting its film continuity and cohesive strength, and is prone to film damage or adhesion to the rubber surface under pressure and heat conditions. In addition, nano calcium carbonate is prone to agglomeration in the unmodified matrix, causing internal defects in the coating, further reducing the consistency of the overall mechanical properties and release effect.
[0027] In summary, by pyridylization and subsequent graft modification of polyvinyl alcohol, the benzotriazole structure with anchoring effect and flexible segments are introduced, which not only enhances the dispersion of fillers and interfacial bonding, but also improves the film forming property, flexibility and stability of the coating, thereby achieving excellent release effect and use performance. The environmentally friendly release agent has obvious application advantages in rubber product processing and is suitable for industrialization.
[0028] In the description of the specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0029] The above is only an example and description of the present application, and those skilled in the art can make various modifications or supplements to the described specific embodiments or use similar ways to replace, as long as it does not deviate from the invention or exceed the scope defined by the present claims, and should belong to the protection scope of the present application.
Claims
1. A method for preparing an environmentally friendly isolating agent, characterized in that, Including the following processes: Step 1: Mix polyvinyl alcohol, 4-formaldehyde pyridine, and deionized water, raise the temperature to 80-90℃, react for 1-2 hours, adjust the pH to 8 after the reaction, and then perform post-treatment to obtain pyridine-modified polyvinyl alcohol. Step 2: Mix pyridine-modified polyvinyl alcohol, N,N-dimethylformamide, and modifier, raise the temperature to 90-100℃, react for 3-4 hours, after the reaction is complete, cool to room temperature, filter, wash, and dry to obtain modified polyvinyl alcohol powder; Step 3: Add modified polyvinyl alcohol powder, nano calcium carbonate, and polyethylene glycol to a high-speed mixer and dry mix at room temperature for 5-10 minutes. Then slowly add glycerol and deionized water and continue mixing. After that, feed the mixture into a twin-screw extruder, extrude and granulate, and vacuum dry to obtain the environmentally friendly release agent.
2. The method for preparing an environmentally friendly isolating agent according to claim 1, characterized in that, The raw materials for preparing the pyridine-modified polyvinyl alcohol include the following components: by weight, 10-12 parts polyvinyl alcohol, 2-3 parts 4-formaldehyde pyridine, and 100-120 parts deionized water.
3. The method for preparing an environmentally friendly isolating agent according to claim 1, characterized in that, The raw materials for preparing the modified polyvinyl alcohol powder include the following components: by weight, 10-12 parts of pyridine-modified polyvinyl alcohol, 80-100 parts of N,N-dimethylformamide, and 3-5 parts of modifier.
4. The method for preparing an environmentally friendly isolating agent according to claim 1, characterized in that, The raw materials for preparing the environmentally friendly isolation agent include the following components: by weight, 69-80 parts modified polyvinyl alcohol powder, 30-50 parts nano calcium carbonate, 8-12 parts polyethylene glycol, 3-5 parts glycerol, and 20-40 parts deionized water.
5. The method for preparing an environmentally friendly isolating agent according to claim 1, characterized in that, The preparation process of the modifier is as follows: S1: Add 2-nitroaniline to deionized water, add dilute hydrochloric acid, stir for 10-15 min under ice bath conditions, then slowly add sodium nitrite aqueous solution, continue stirring for 30-40 min, add urea to remove excess sodium nitrite, filter, and slowly add the obtained liquid to resorcinol solution, keep at 0-5℃, react for 3-4 h, recrystallize to obtain intermediate 1; S2: Mix intermediate 1 with anhydrous ethanol, add sodium hydroxide solution, raise the temperature to 80-90℃, reflux for 1-2 hours, then add thiourea dioxide, continue the reaction for 40-50 minutes, filter, wash, and dry to obtain intermediate 2. S3: Mix intermediate 2, 1-bromo-6-chloropentane, potassium carbonate, and chloroform. Stir until homogeneous, raise the temperature to 80-90℃, and reflux for 6-8 hours. After the reaction is complete, cool to room temperature and perform post-treatment to obtain the modifier.
6. The method for preparing an environmentally friendly isolating agent according to claim 5, characterized in that, The raw materials for preparing intermediate 1 include the following components: by weight, 10-12 parts of 2-nitroaniline, 80-120 parts of deionized water, 15-25 parts of dilute hydrochloric acid, 8-9 parts of sodium nitrite aqueous solution, and 30-40 parts of resorcinol solution; wherein the concentration of sodium nitrite aqueous solution is 25wt%, the concentration of resorcinol solution is 15wt%, and the concentration of dilute hydrochloric acid is 10wt%.
7. The method for preparing an environmentally friendly isolating agent according to claim 5, characterized in that, The raw materials for preparing intermediate 2 include the following components: by weight, 10-12 parts of intermediate 1, 80-100 parts of anhydrous ethanol, 20-30 parts of sodium hydroxide solution, and 8-10 parts of thiourea dioxide; wherein the concentration of sodium hydroxide solution is 25 wt%.
8. The method for preparing an environmentally friendly isolating agent according to claim 5, characterized in that, The raw materials for preparing the modifier include the following components: by weight, 10-12 parts intermediate 2, 10-12 parts 1-bromo-6-chloropentane, 12-15 parts potassium carbonate, and 80-100 parts chloroform.
9. The environmentally friendly isolating agent obtained by the preparation method of the environmentally friendly isolating agent according to any one of claims 1-8.
10. The application of the environmentally friendly release agent according to claim 9 in rubber release agents.