Granular rubber particle separant as well as preparation method and application thereof

Abstract

The invention provides a granular rubber particle separant as well as a preparation method and application thereof. The rubber particle separant comprises the following raw materials in parts by weight: 6-12 parts of ammonium laurate, 1-5 parts of polyglycerol fatty acid ester, 1-5 parts of sodium lignin sulfonate and 120-150 parts of water. According to the invention, ammonium laurate, polyglycerol fatty acid ester and sodium lignin sulfonate are compounded to prepare the separant, and the separant can be uniformly dispersed on the surfaces of rubber particles to form a thin and uniform isolating membrane layer, so that a good isolating effect is achieved, and mutual adhesion among the rubber particles is effectively prevented. The separant replaces lime powder and talcum powder to be applied to the production process of rubber particles, the rubber particles are easy to dry and good in physical and chemical performance, the separant adding method is simple and easy to operate, and meanwhile the adverse effects of the lime powder, the talcum powder and other dust on the environment and the physical and psychological health of workers can be avoided. In addition, the purposes of improving the product performance and improving the benefits of the raw rubber processing industry can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of rubber release agents, and in particular to a granular rubber particle release agent and a preparation method and application thereof. Background Art

[0002] Rubber is a material with self-adhesiveness. This property makes it easy for rubber to adhere to other rubber materials during production, processing and transportation. This adhesion not only affects the processing efficiency of rubber, but also brings many inconveniences during transportation. For example, in the production process of rubber sheets, due to the existence of self-adhesiveness, rubber sheets may stick together, making sorting and packaging more difficult. Similarly, during transportation, rubber materials may be difficult to separate due to mutual adhesion, thus affecting the smooth progress of loading and unloading operations. How to effectively solve the adhesion problem of rubber during production, processing and transportation has become an important challenge that related industries need to face. Therefore, an isolation agent needs to be added during the rubber processing process to prevent mutual adhesion. In the current market, there are various types of rubber isolation agents, covering various forms such as powders, pastes, liquids and suspensions. These different forms of rubber isolation agents each have their own unique advantages and applicable scenarios to meet various industrial needs. Although there are various types of rubber isolation agents on the market, due to the unreasonable raw material composition ratio and unscientific preparation process, the isolation agent obtained has poor effect and is difficult to achieve a good isolation effect. At the same time, it also causes the impurities, ash content and other properties of the granular rubber particles to deteriorate, affecting the quality of the product.

[0003] Granulated rubber particles are obtained by putting rubber dry sheets into a granulator for granulation. At present, lime or talcum powder is generally used as an isolation agent for granulated rubber particles in China. Lime and talcum powder as granulated rubber particle isolation agents are prone to increase the product's impurity content and ash content indicators, and dust is harmful to the environment and the physical and mental health of workers, so they are not suitable as granulated rubber particle isolation agents. Summary of the invention

[0004] In view of this, the present invention proposes a granular rubber particle isolation agent and its preparation method and application. The isolation agent of the present invention can make the granular rubber particles evenly dispersed, has good isolation effect, is easy to operate, and is pollution-free, and can replace traditional lime and talcum powder as the raw material of the granular rubber particle isolation agent.

[0005] The technical solution of the present invention is achieved in this way:

[0006] A granular rubber particle isolation agent comprises the following raw materials in parts by weight: 6-12 parts of ammonium laurate, 1-5 parts of polyglycerol fatty acid ester, 1-5 parts of sodium lignin sulfonate and 110-150 parts of water.

[0007] Furthermore, the granular rubber particle isolation agent comprises the following raw materials in parts by weight: 6-8 parts of ammonium laurate, 3-4 parts of polyglycerol fatty acid ester, 3-4 parts of sodium lignin sulfonate, and 120-130 parts of water.

[0008] Furthermore, the granular rubber particle release agent comprises the following raw materials in parts by weight: 7 parts of ammonium laurate, 3 parts of polyglycerol fatty acid ester, 4 parts of sodium lignin sulfonate, and 120 parts of water.

[0009] The preparation method of the granular rubber particle release agent comprises the following steps:

[0010] S1, adding sodium lignin sulfonate to water and stirring at a speed of 300-500 r / min for 5-6 min, adding polyglycerol fatty acid ester and stirring at a speed of 300-500 r / min for 6-8 min, and finally adding ammonium laurate and stirring at a speed of 1000-1200 r / min for 10-12 min, filtering, and obtaining a mixed liquid;

[0011] S2. The mixed liquid is subjected to high-speed processing at a speed of 2000-3000 r / min for 5-8 minutes, and then homogenized to obtain a granular rubber particle isolation agent.

[0012] Furthermore, the homogenization is performed at a pressure of 20 to 30 MPa for 4 to 5 minutes, and the homogenization is repeated 3 to 4 times.

[0013] Furthermore, the homogenization is performed at a pressure of 30 MPa for 5 minutes, and the homogenization is repeated 4 times.

[0014] Application of the release agent of the present invention or the release agent prepared by the preparation method of the present invention in the preparation of granular rubber particles.

[0015] Furthermore, the release agent is added when the film is transported to a granulator for granulation.

[0016] Furthermore, the mass dosage of the release agent is 0.03-0.05% of the mass of the film.

[0017] Furthermore, the mass dosage of the release agent is 0.05% of the mass of the film.

[0018] Furthermore, the release agent is added by dropping.

[0019] Furthermore, the film has a thickness of 4 to 5 mm.

[0020] Furthermore, the film thickness is 5 mm.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention prepares an isolation agent by compounding ammonium laurate, polyglycerol fatty acid ester and sodium lignin sulfonate, which can be evenly dispersed on the surface of the granular rubber particles to form a thin and uniform isolation film layer, which plays a good isolation role and effectively prevents the granular rubber particles from sticking to each other. In the process of preparing the isolation agent, the present invention adds raw materials for multiple stirring and dispersion, so that the raw materials can be evenly dispersed in water, and then the mixed liquid is processed and homogenized at high speed to form a uniform and stable mixed solution, so that the isolation agent can be more evenly distributed on the surface of the granular rubber particles during use, thereby achieving a better isolation effect.

[0023] The release agent of the present invention is used in the production process of granular rubber particles instead of lime powder and talcum powder. The granular rubber particles are easy to dry and have good physical and chemical properties. The release agent addition method is simple and easy to operate. At the same time, the adverse effects of lime powder, talcum powder and other dust on the environment and the physical and mental health of workers can be avoided. In addition, the purpose of improving product performance and improving the efficiency of the raw rubber processing industry can be achieved.

[0024] The release agent of the present invention is used to prepare granular rubber particles. The granular rubber particle product has an impurity content of 0.030-0.32%, an ash content of 0.31-0.34%, a nitrogen content of 0.29-0.31%, a volatile matter content of 0.53-0.54%, an initial plasticity value (P0) of 38.18-38.96, a plasticity retention index (PRI) of 65.69-66.12, and a Mooney viscosity of 75.63-75.84. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention is a process flow chart for producing granulated rubber particles using a release agent. DETAILED DESCRIPTION

[0026] In order to better understand the technical content of the present invention, specific embodiments are provided below to further illustrate the present invention.

[0027] Unless otherwise specified, the experimental methods used in the embodiments of the present invention are all conventional methods.

[0028] Unless otherwise specified, the materials, reagents, etc. used in the embodiments of the present invention can be obtained from commercial sources.

[0029] The manufacturer of the ammonium laurate of the present invention is Pushan Industrial (Shaanxi) Co., Ltd., product name: ammonium laurate, CAS: 2437-23-2.

[0030] The polyglycerol fatty acid ester of the present invention is manufactured by Wuhan Chengtian Fine Chemical Co., Ltd., product name: polyglycerol fatty acid ester, CAS: 67784-82-1.

[0031] The sodium lignin sulfonate manufacturer of the present invention is: Shandong Zhongrun Haihua Chemical Technology Co., Ltd., product name: sodium lignin sulfonate, CAS: 8061-51-6.

[0032] Example 1

[0033] The granular rubber particle release agent of this embodiment includes the following raw materials in parts by weight: 7 parts of ammonium laurate, 3 parts of polyglycerol fatty acid ester, 4 parts of sodium lignin sulfonate, and 120 parts of water;

[0034] The preparation method of the granular rubber particle isolation agent comprises the following steps:

[0035] S1. After adjusting the temperature to 65° C., sodium lignin sulfonate was added to water and stirred at 400 r / min for 6 min, polyglycerol fatty acid ester was added and stirred at 400 r / min for 8 min, and finally ammonium laurate was added and stirred at 1200 r / min for 10 min, and filtered to obtain a mixed liquid;

[0036] S2. The mixed liquid is subjected to high-speed processing at a speed of 2500 r / min for 6 minutes, and then homogenized at a pressure of 30 MPa for 5 minutes. The homogenization is repeated 4 times to obtain a granular rubber particle isolation agent.

[0037] Example 2

[0038] The granular rubber particle release agent of this embodiment includes the following raw materials in parts by weight: 6 parts of ammonium laurate, 5 parts of polyglycerol fatty acid ester, 2 parts of sodium lignin sulfonate, and 130 parts of water;

[0039] The preparation method of the granular rubber particle isolation agent comprises the following steps:

[0040] S1, after adjusting the temperature to 65°C, adding sodium lignin sulfonate into water, stirring and mixing at a speed of 500r / min for 5min, adding polyglycerol fatty acid ester, stirring and mixing at a speed of 500r / min for 7min, and finally adding ammonium laurate, stirring and mixing at a speed of 1100r / min for 12min, filtering, and obtaining a mixed liquid;

[0041] S2. The mixed liquid is subjected to high-speed processing at a speed of 3000 r / min for 5 minutes, and then homogenized at a pressure of 20 MPa for 4 minutes. The homogenization is repeated 3 times to obtain a granular rubber particle isolation agent.

[0042] Example 3

[0043] The granular rubber particle release agent of this embodiment includes the following raw materials in parts by weight: 8 parts of ammonium laurate, 4 parts of polyglycerol fatty acid ester, 3 parts of sodium lignin sulfonate, and 150 parts of water;

[0044] The preparation method of the granular rubber particle isolation agent comprises the following steps:

[0045] S1, after adjusting the temperature to 65°C, adding sodium lignin sulfonate into water, stirring and mixing at a speed of 300r / min for 5min, adding polyglycerol fatty acid ester, stirring and mixing at a speed of 300r / min for 8min, and finally adding ammonium laurate, stirring and mixing at a speed of 1000r / min for 10min, filtering, and obtaining a mixed liquid;

[0046] S2. The mixed liquid is subjected to high-speed processing at a speed of 2000 r / min for 6 minutes, and then homogenized at a pressure of 25 MPa for 5 minutes. The homogenization is repeated 4 times to obtain a granular rubber particle isolation agent.

[0047] Comparative Example 1

[0048] The difference between this comparative example and Example 1 is that the raw material ratio of the release agent is different, and the rest is consistent with Example 1.

[0049] The granular rubber particle release agent of this comparative example comprises the following raw materials in parts by weight: 3 parts of ammonium laurate, 6 parts of polyglycerol fatty acid ester, 5 parts of sodium lignin sulfonate, and 120 parts of water.

[0050] Comparative Example 2

[0051] The difference between this comparative example and Example 1 is that the process conditions of step S1 are changed, and the rest are consistent with Example 1.

[0052] The preparation method of the granular rubber particle isolation agent of this comparative example comprises the following steps:

[0053] S1. After adjusting the temperature to 65° C., add ammonium laurate, polyglycerol fatty acid ester and sodium lignin sulfonate into water, and stir and mix at 300 r / min for 15 min to obtain a mixed liquid;

[0054] S2. The mixed liquid is subjected to high-speed processing at a speed of 2500 r / min for 6 minutes, and then homogenized at a pressure of 30 MPa for 5 minutes. The homogenization is repeated 4 times to obtain a granular rubber particle isolation agent.

[0055] Comparative Example 3

[0056] The difference between this comparative example and Example 1 is that the preparation process of S2 is changed, and the rest is consistent with Example 1.

[0057] The preparation method of the granular rubber particle isolation agent of this comparative example comprises the following steps:

[0058] S1. After adjusting the temperature to 65° C., sodium lignin sulfonate was added to water and stirred at 400 r / min for 6 min. Polyglycerol fatty acid ester was added and stirred at 400 r / min for 8 min. Finally, ammonium laurate was added and stirred at 1200 r / min for 10 min. The mixture was filtered to obtain a mixed liquid.

[0059] S2. The mixed liquid is subjected to high-speed treatment at a speed of 1500 r / min for 6 minutes to obtain a granular rubber particle isolation agent.

[0060] The release agent prepared in Examples 1-3 of the present invention and Comparative Examples 1-3 is used to prepare granular rubber particles. The specific process is as follows: a rubber film with a thickness of 5 mm from the same batch is transported to the feed port of a granulator, a container is placed above the granulator, and a delivery pipe is led from the outlet of the container to the feed port of the granulator. During granulation, the release agent is dripped at the film feed port to make the release agent solution evenly dispersed in the granular rubber particles. The mass amount of the release agent is 0.05% of the mass of the film. The prepared granular rubber particles are loaded and dripped with water to make the water content of the granular rubber particles ≤32%, and then dried for 10 hours under the conditions of a front-end temperature of 116°C and a rear-end temperature of 105°C, and then cooled to below 50°C, graded and packaged to obtain granular rubber particles.

[0061] The performance of the granular rubber particles prepared above was tested to determine their impurity content, ash content, nitrogen content, volatile matter content, initial plasticity value, plasticity retention index, and Mooney viscosity. The test reference standard date of each index is shown in Table 1 below, and the measurement results are shown in Table 2 below.

[0062] Table 1 Reference test methods for performance of granular rubber particles

[0063] Performance Indicators Test methods Impurity content, % GB / T 8086 Ash content, % GB / T 4498 Nitrogen content, % GB / T 8088 Volatile matter content, % GB / T 24131 Initial plasticity value, (P0) GB / T 3510 Plasticity Retention Index (PRI) GB / T 3517 Mooney viscosity, ML / (1'+4')100℃ GB / T 1232.1

[0064] Table 2 Test results of granular rubber particles

[0065]

[0066]

[0067] The above results show that the scientific and reasonable raw material ratios and preparation processes of Examples 1-3 of the present invention can reduce the impurities, ash and nitrogen content in the granular rubber particles, and at the same time, can maintain a good initial plasticity value, plasticity retention index and Mooney viscosity of the granular rubber particles. Compared with Example 1, Comparative Example 1 changes the raw material ratio of the release agent. Although it can reduce the content of impurities, ash, nitrogen and volatiles in the granular rubber particles, it has a slight effect on the initial plasticity value, plasticity retention index and Mooney viscosity of the granular rubber particles. Compared with Example 1, Comparative Example 2 changes the process conditions of step S1, and Comparative Example 3 changes the process conditions of step S2, which will affect the impurity content, ash content, nitrogen content, volatile content, initial plasticity value, plasticity retention index, and Mooney viscosity performance indicators of the granular rubber particles.

[0068] In addition, after the release agents prepared by the above-mentioned Examples 1-3 and Comparative Examples 1-3 were used in the preparation of granular rubber particles, the granular rubber particles were dried and it was found that the surface of the granular rubber particles of the groups of Examples 1-3 of the present invention was completely dry, not sticky, and not sticking together, with good dispersibility, and no coarse particles. Some of the granular rubber particles of the group of Comparative Example 1 would stick together. The granular rubber particles of Comparative Examples 2 and 3 both had more particles sticking together, and there were slightly coarse particles on the surface. It shows that a uniform and stable release agent can be prepared through the reasonable release agent raw material ratio and scientific preparation process of the present invention. After use, a thin and uniform release layer can be formed on the surface of the granular rubber particles, which can accelerate the drying of the granular rubber particles and effectively prevent them from sticking together, with a good effect.

[0069] Example 4

[0070] The granular rubber particle release agent of this embodiment includes the following raw materials in parts by weight: 6 parts of ammonium laurate, 3 parts of polyglycerol fatty acid ester, 3 parts of sodium lignin sulfonate, and 120 parts of water;

[0071] The preparation method of the granular rubber particle isolation agent comprises the following steps:

[0072] S1. After adjusting the temperature to 65°C, sodium lignin sulfonate was added to water and stirred at 300 r / min for 5 min, polyglycerol fatty acid ester was added and stirred at 300 r / min for 6 min, and finally ammonium laurate was added and stirred at 1000 r / min for 10 min, and filtered to obtain a mixed liquid;

[0073] S2. The mixed liquid is subjected to high-speed processing at a speed of 2000 r / min for 5 minutes, and then homogenized at a pressure of 20 MPa for 4 minutes. The homogenization is repeated 3 times to obtain a granular rubber particle isolation agent.

[0074] Example 5

[0075] The granular rubber particle release agent of this embodiment includes the following raw materials in parts by weight: 8 parts of ammonium laurate, 4 parts of polyglycerol fatty acid ester, 4 parts of sodium lignin sulfonate, and 130 parts of water;

[0076] The preparation method of the granular rubber particle isolation agent comprises the following steps:

[0077] S1, after adjusting the temperature to 65°C, adding sodium lignin sulfonate into water, stirring and mixing at a speed of 500r / min for 6min, adding polyglycerol fatty acid ester, stirring and mixing at a speed of 500r / min for 8min, and finally adding ammonium laurate, stirring and mixing at a speed of 1200r / min for 12min, filtering, and obtaining a mixed liquid;

[0078] S2. The mixed liquid is subjected to high-speed processing at a speed of 3000 r / min for 8 minutes, and then homogenized at a pressure of 30 MPa for 5 minutes. The homogenization is repeated 3 times to obtain a granular rubber particle isolation agent.

[0079] The release agent prepared in the above-mentioned Examples 4-5 of the present invention is used in the granular rubber particles, which can also achieve a good isolation and anti-adhesion effect, and at the same time can also ensure the quality of the granular rubber particles.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A granular rubber particle release agent, characterized in that: The invention comprises the following raw materials in parts by weight: 6-12 parts of ammonium laurate, 1-5 parts of polyglycerol fatty acid ester, 1-5 parts of sodium lignin sulfonate and 110-150 parts of water.

2. The granulated rubber particle release agent according to claim 1, characterized in that: The invention comprises the following raw materials in parts by weight: 6-8 parts of ammonium laurate, 3-4 parts of polyglycerol fatty acid ester, 3-4 parts of sodium lignin sulfonate and 120-130 parts of water.

3. The granulated rubber particle release agent according to claim 1, characterized in that: The invention comprises the following raw materials in parts by weight: 7 parts of ammonium laurate, 3 parts of polyglycerol fatty acid ester, 4 parts of sodium lignin sulfonate and 120 parts of water.

4. The method for preparing the granular rubber particle release agent according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1, adding sodium lignin sulfonate to water and stirring at a speed of 300-500 r / min for 5-6 min, adding polyglycerol fatty acid ester and stirring at a speed of 300-500 r / min for 6-8 min, and finally adding ammonium laurate and stirring at a speed of 1000-1200 r / min for 10-12 min, filtering, and obtaining a mixed liquid; S2. The mixed liquid is subjected to high-speed processing at a speed of 2000-3000 r / min for 5-8 minutes, and then homogenized to obtain a granular rubber particle isolation agent.

5. The method for preparing the granulated rubber particle release agent according to claim 4, characterized in that: The homogenization is carried out at a pressure of 20 to 30 MPa for 4 to 5 minutes, and the homogenization is repeated 3 to 4 times.

6. Use of the release agent according to any one of claims 1 to 3 or the release agent prepared by the preparation method according to any one of claims 4 to 5 in preparing granular rubber particles.

7. The use according to claim 6, characterized in that: The release agent is added when the film is conveyed to a granulator for granulation.

8. The use according to claim 7, characterized in that: The mass dosage of the release agent is 0.03-0.05% of the mass of the film.

9. The use according to claim 7, characterized in that: The release agent is added in a dropwise manner.

10. The use according to claim 7, characterized in that: The film thickness is 4-5 mm.

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