Comprehensive scene high-resilience super-wear-resistant rubber and preparation method thereof

Abstract

The invention relates to the technical field of rubber materials, and particularly discloses comprehensive scene high-resilience super-wear-resistant rubber and a preparation method thereof. The comprehensive scene high-resilience super-wear-resistant rubber is prepared from the following components: 20 to 80 parts of natural rubber, 20 to 80 parts of butadiene rubber, 3 to 9 parts of an activating agent, 1 to 3 parts of an anti-aging agent, 20 to 50 parts of a reinforcing agent, 1.5 parts of paraffin, 2 to 5 parts of naphthenic oil, 0.8 to 1.5 parts of an accelerant, 0.8 to 1.5 parts of a vulcanizing agent, 1 to 8 parts of polyethylene glycol, 3 to 5 parts of hydrogenated castor oil and 3 to 6 parts of coumarone resin. The comprehensive scene high-resilience super-wear-resistant rubber has the effects of high elasticity, impact resistance, high Akron wear resistance, periodic friction resistance and easiness in processing.

Description

Technical Field

[0001] The present application relates to the technical field of rubber materials, and in particular to a comprehensive scenario high-resilience and super-wear-resistant rubber and a preparation method thereof. Background Art

[0002] Rubber has gradually transformed from focusing on output and price to developing high-quality and high-standard requirements for product performance. In particular, high-wear-resistant rubber has greatly expanded the application scenarios and service life of rubber products in tires, sole products, conveyor belts, and pipelines. Its wear resistance directly determines the quality and service life of livelihood projects in various fields such as energy, water treatment, and various pipelines.

[0003] The design of traditional super wear-resistant rubber focuses on reducing Akron wear and fatigue wear, so a large amount of carbon black or white carbon black and silane coupling agent and other reinforcing agents are usually added. Although the addition of a large amount of reinforcing agents increases Akron wear and hardness, the impact resistance and abrasion resistance of rubber are significantly reduced, and the resilience is significantly reduced, which will cause the rubber to easily break when facing sharp objects and impact wear scenes, and the service life is greatly reduced. And from an industrial perspective, the higher hardness of rubber makes it more difficult to process patches, limiting the application of super wear-resistant rubber in various fields.

[0004] Therefore, there is an urgent need for a new method to prepare rubber that has high elasticity and impact resistance, high Akron wear resistance, cyclic friction resistance, and is easy to process, so as to cope with comprehensive wear-resistant scenarios in complex industrial environments. Summary of the invention

[0005] In order to obtain a rubber that has high elasticity and impact resistance, high Akron wear resistance, periodic friction resistance, and is easy to process, the present application provides a comprehensive scenario high-rebound super-wear-resistant rubber and a preparation method thereof.

[0006] In the first aspect, the present application provides a comprehensive scenario high-resilience super-wear-resistant rubber, which adopts the following technical solution:

[0007] A comprehensive scenario high-resilience super-wear-resistant rubber comprises the following components: natural rubber: 20-80 parts, butadiene rubber: 20-80 parts, activator: 3-9 parts, antioxidant: 1-3 parts, reinforcing agent: 20-50 parts, paraffin: 1.5 parts, cyclohexane oil: 2-5 parts, accelerator: 0.8-1.5 parts, vulcanizer: 0.8-1.5 parts, polyethylene glycol: 1-8 parts, hydrogenated castor oil: 3-5 parts and coumarone resin: 3-6 parts.

[0008] By adopting the above technical scheme, natural rubber has the characteristics of high molecular weight and good mechanical properties that cannot be replaced by synthetic rubber, and has good flexural fatigue resistance, air tightness and electrical insulation, and is easy to mix and process; the molecular chain of butadiene rubber has no side groups and excellent molecular flexibility, so it has the characteristics of high resilience and high wear resistance; the super wear-resistant rubber of the present application combines the advantages of high tensile strength of natural rubber and high resilience and high wear resistance of butadiene rubber, and the use of a reinforcing agent achieves a balance between resilience and fatigue wear, and a small amount of polyethylene glycol PEG4000 is used as a dispersant and adhesive to improve the compatibility of the mixed rubber and the poor dispersion of the reinforcing agent due to excessively fine particles, and improves the compatibility and chemical bonding ability of the reinforcing agent and other matching systems with the rubber matrix, so that the mechanical properties of this super wear-resistant rubber-based composite material reach the best level, expanding the application scenarios of super wear-resistant rubber in various industrial fields. After comprehensive consideration of performance and process, adding hydrogenated castor oil has a significant effect of enhancing fluidity and solubilization, dissolving incompatible components during mixing, transitional fusion of polar compounding agents and non-polar rubber materials between heterogeneous phases, and enhancing the bonding of the reinforcing network of the reinforcing agent between rubbers. In addition, coumarone resin has the effect of viscosity enhancement and reinforcement, which can improve the dispersion and processing performance of the reinforcing agent in the rubber material, and is conducive to the formation of the overall reinforcement network of the rubber.

[0009] Optionally, the mixing ratio of the natural rubber to the butadiene rubber is 0.5-1.5.

[0010] By adopting the above technical scheme, the setting of the mixing ratio of natural rubber and butadiene rubber can maximize the strength of natural rubber and the wear-resistant and rebound characteristics of butadiene rubber, so that the rubber can be better matched with the compounding agent system, and the super wear-resistant rubber has the effects of high elasticity and impact resistance, high Akron wear and resistance to periodic friction.

[0011] Optionally, the activator is one or more of zinc oxide or stearic acid.

[0012] By adopting the above technical solution, zinc oxide or stearic acid are both common activators in the field, with low cost and easy to obtain raw materials, thus reducing enterprise costs.

[0013] Optionally, the reinforcing agent is one or a mixture of carbon black N220 or carbon black N330.

[0014] Optionally, the antioxidant is N-isopropyl-N'-phenyl-p-phenylenediamine.

[0015] Optionally, the accelerator is N-cyclohexyl-2-benzothiazole sulfenamide.

[0016] Optionally, the vulcanizing agent is sulfur.

[0017] Optionally, the molecular weight of the polyethylene glycol is 4000.

[0018] By adopting the above technical solution, polyethylene glycol with a molecular weight of 4000 is used as a dispersant and adhesive to improve the compatibility of the mixed rubber and the poor dispersion of the reinforcing agent due to excessively fine particles, and to improve the compatibility and chemical bonding ability of the reinforcing agent and other matching systems with the rubber matrix, so that the mechanical properties of this ultra-wear-resistant rubber-based composite material reach the optimal level.

[0019] In the second aspect, the present application provides a method for preparing a comprehensive scenario high-resilience super-wear-resistant rubber, which adopts the following technical solution:

[0020] A method for preparing a comprehensive scenario high-resilience super-wear-resistant rubber comprises the following steps:

[0021] Step S1, raw material preparation stage, natural rubber and butadiene rubber are plasticized and mixed on an open mill, and compounding agents such as activator, antioxidant and reinforcing agent are weighed in proportion and set aside;

[0022] Step S2, mixing preparation stage, adding the rubber material mixed in step S1 to the compounding agent and mixing in a mixer, the mixing temperature is 50-120°C, the mixing time is 10min-25min, and after cooling to 60°C, the vulcanizing agent and accelerator are added;

[0023] Step S3, vulcanization stage, vulcanize the mixed rubber prepared in step S2 on a vulcanizer, the vulcanization temperature is 130-160° C., the vulcanization time is 10-15 min, and the vulcanization pressure is 14 MPa.

[0024] By adopting the above technical scheme, natural rubber and butadiene rubber are used as the rubber matrix of the super wear-resistant rubber of the present application, which maximizes the strength of natural rubber and the wear-resistant and rebound characteristics of butadiene rubber. The super wear-resistant rubber of the present application has excellent physical properties, low cost, and a simple preparation method. The service life of the super wear-resistant rubber of the present application can be improved and the enterprise cost can be reduced. After the rubber material mixed in step S1 of the present application is added to the compounding agent, it is mixed at a lower temperature of 50-120°C, which is more conducive to the dispersion of carbon black in the rubber, thereby making the rubber material obtained in step S2 stronger and improving the Akron wear of the super wear-resistant rubber of the present application.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The present application adopts natural rubber and butadiene rubber as the rubber matrix, which maximizes the strength of natural rubber and the wear resistance and resilience of butadiene rubber. It has excellent physical properties, low cost, simple preparation method, can improve the service life of rubber and reduce enterprise costs; the addition of reinforcing agent makes the rubber resilience and fatigue wear reach a balance, and polyethylene glycol as a dispersant and adhesive improves the compatibility of mixed rubber and the poor dispersion of reinforcing agent due to too fine particles, improves the compatibility and chemical bonding ability of reinforcing agent and other matching systems with rubber matrix, so that As a result, the mechanical properties of the super-wear-resistant rubber-based composite material have reached the optimal level, expanding the application scenarios of super-wear-resistant rubber in various industrial fields; hydrogenated castor oil has a significant effect of enhancing fluidity and solubilization, which dissolves incompatible components during the mixing process, and the polar compounding agent and the non-polar rubber compound transition and fuse between heterogeneous phases, and can also enhance the bonding of the reinforcing network of the reinforcing agent between rubbers; in addition, coumarone resin has the effect of viscosity enhancement and reinforcement, which can improve the dispersion and processing performance of the reinforcing agent in the rubber compound, and is conducive to the formation of the overall reinforcement network of the rubber.

[0027] 2. The setting of the mixing ratio of natural rubber and butadiene rubber can maximize the combination of the advantages of high tensile strength of natural rubber and high resilience and high wear resistance of butadiene rubber, so that the mechanical properties of this super wear-resistant rubber-based composite material reach a better level;

[0028] 3. In step S2 of the preparation method of the super wear-resistant rubber of the present application, after the mixed rubber is added with the compounding agent, it is kneaded at a relatively low temperature of 50-120°C, which is more conducive to the dispersion of carbon black in the rubber, thereby making the obtained rubber stronger and more stable in performance, thereby improving the Akron wear of the super wear-resistant rubber of the present application. DETAILED DESCRIPTION

[0029] The present application is further described in detail below with reference to the embodiments.

[0030] Embodiment 1:

[0031] A comprehensive scenario high-rebound super-wear-resistant rubber, comprising the following components:

[0032] 60 parts of natural rubber, 40 parts of butadiene rubber, 5 parts of zinc oxide, 2 parts of stearic acid, 2 parts of antioxidant, 40 parts of carbon black N220, 1.5 parts of paraffin, 3 parts of naphthenic oil, 1.5 parts of accelerator, 1.5 parts of sulfur, 1 part of polyethylene glycol, 3 parts of hydrogenated castor oil and 3 parts of coumarone resin. Among them, natural rubber was purchased from Hainan Natural Rubber Industry Group Co., Ltd., model SCR5; butadiene rubber was purchased from Qilu Petrochemical, model BR9000; zinc oxide was purchased from Dalian Zinc Oxide Plant, and the product grade was industrial grade; stearic acid was purchased from Shenyang Xinhua Reagent Factory, and the product grade was industrial grade; antioxidant N-isopropyl-N'-phenyl-p-phenylenediamine was purchased from Shandong Yousuo Chemical Technology Co., Ltd., model 4010NA, and the product grade was industrial grade; carbon black N220 was purchased from Zhangqiu Yongzhen Carbon Black Equipment Factory, and the product grade was industrial grade; accelerator N-cyclohexyl-2-benzothiazole sulfonamide was purchased from Zhejiang Huangyan Zhedong Rubber Additive Co., Ltd., and the product grade was industrial grade; sulfur was purchased from Renxian Industrial and Agricultural Chemical Plant, and the product grade was industrial grade.

[0033] Preparation method of high-resilience and super-wear-resistant rubber for comprehensive scenarios:

[0034] Step S1, 60 parts of natural rubber and 40 parts of butadiene rubber are plasticized and mixed on an open mill at a plasticizing temperature of 50° C. for 15 minutes;

[0035] Step S2, mixing the mixed rubber obtained in step S1, 2 parts of stearic acid, 5 parts of zinc oxide, 2 parts of antioxidant, 40 parts of carbon black N220 and 1.5 parts of paraffin in a mixer at a mixing temperature of 80° C. for 5 minutes;

[0036] Then add 1 part of polyethylene glycol, 3 parts of hydrogenated castor oil, 3 parts of coumarone resin and 3 parts of cycloparaffin oil, continue mixing for 5 minutes and then cool to 60°C;

[0037] Then add 1.5 parts of sulfur and 1.5 parts of accelerator, continue mixing for 3 minutes, and debond at 100°C;

[0038] Step S3, after the mixed rubber obtained in step S2 is calendered on an open mixing mill, it is vulcanized on a flat vulcanizer at 145° C. for 20 minutes to obtain the high-resilience and super-wear-resistant rubber for comprehensive scenarios of the present application.

[0039] Embodiment 2:

[0040] A comprehensive scenario high-rebound super-wear-resistant rubber, comprising the following components:

[0041] 70 parts of natural rubber, 30 parts of butadiene rubber, 5 parts of zinc oxide, 2 parts of stearic acid, 2 parts of antioxidant, 40 parts of carbon black N220, 1.5 parts of paraffin, 3 parts of naphthenic oil, 1.5 parts of accelerator, 1.5 parts of sulfur, 1 part of polyethylene glycol, 3 parts of hydrogenated castor oil and 3 parts of coumarone resin.

[0042] The preparation method of the high-resilience and super-wear-resistant rubber for comprehensive scenarios is the same as that in Example 1.

[0043] Example 3

[0044] A comprehensive scenario high-rebound super-wear-resistant rubber, comprising the following components:

[0045] 60 parts of natural rubber, 40 parts of butadiene rubber, 5 parts of zinc oxide, 2 parts of stearic acid, 2 parts of antioxidant, 55 parts of carbon black N220, 1.5 parts of paraffin, 3 parts of naphthenic oil, 1.5 parts of accelerator, 1.5 parts of sulfur, 1 part of polyethylene glycol, 3 parts of hydrogenated castor oil and 3 parts of coumarone resin.

[0046] The preparation method of the high-resilience and super-wear-resistant rubber for comprehensive scenarios is the same as that in Example 1.

[0047] Comparative Example 1

[0048] A comprehensive scenario high-rebound super-wear-resistant rubber, comprising the following components:

[0049] 100 parts of natural rubber, 5 parts of zinc oxide, 2 parts of stearic acid, 2 parts of antioxidant, 40 parts of carbon black N220, 1.5 parts of paraffin, 3 parts of naphthenic oil, 1.5 parts of accelerator, 1.5 parts of sulfur, 1 part of polyethylene glycol, 3 parts of hydrogenated castor oil and 3 parts of coumarone resin.

[0050] Preparation method of high-resilience and super-wear-resistant rubber for comprehensive scenarios:

[0051] Step S1, 100 parts of natural rubber are plasticized and mixed on an open mill, the plasticizing temperature is 50° C., and the plasticizing time is 15 minutes;

[0052] Step S2, mixing the mixed rubber obtained in step S1, 2 parts of stearic acid, 5 parts of zinc oxide, 2 parts of antioxidant, 40 parts of carbon black N220 and 1.5 parts of paraffin in a mixer at a mixing temperature of 80° C. for 5 minutes;

[0053] Then, 1 part of polyethylene glycol, 3 parts of hydrogenated castor oil, 3 parts of coumarone resin, 3 parts of cycloparaffin oil, 1.5 parts of sulfur and 1.5 parts of accelerator were added and continued to mix at a mixing temperature of 115°C for 3 minutes, and the mixture was discharged at 100°C.

[0054] Step S3, after the mixed rubber obtained in step S2 is calendered on an open mixing mill, it is vulcanized on a flat vulcanizer at 145° C. for 20 minutes to obtain the high-resilience and super-wear-resistant rubber for comprehensive scenarios of the present application.

[0055] Comparative Example 2

[0056] A comprehensive scenario high-rebound super-wear-resistant rubber, comprising the following components:

[0057] 100 parts of natural rubber, 5 parts of zinc oxide, 2 parts of stearic acid, 2 parts of antioxidant, 40 parts of carbon black N220, 1.5 parts of paraffin, 3 parts of naphthenic oil, 1.5 parts of accelerator, 1.5 parts of sulfur, 1 part of polyethylene glycol, 3 parts of hydrogenated castor oil and 3 parts of coumarone resin.

[0058] Preparation method of high-resilience and super-wear-resistant rubber for comprehensive scenarios:

[0059] Step S1, 100 parts of natural rubber are plasticized and mixed on an open mill, the plasticizing temperature is 50° C., and the plasticizing time is 15 minutes;

[0060] Step S2, mixing the mixed rubber obtained in step S1, 2 parts of stearic acid, 5 parts of zinc oxide, 2 parts of antioxidant, 40 parts of carbon black N220 and 1.5 parts of paraffin in a mixer at a mixing temperature of 80° C. for 5 minutes;

[0061] Then add 1 part of polyethylene glycol, 3 parts of hydrogenated castor oil, 3 parts of coumarone resin and 3 parts of cycloparaffin oil, continue mixing for 5 minutes and then cool to 60°C;

[0062] Then add 1.5 parts of sulfur and 1.5 parts of accelerator, continue mixing for 3 minutes, and debond at 100°C;

[0063] Step S3, after the mixed rubber obtained in step S2 is calendered on an open mixing mill, it is vulcanized on a flat vulcanizer at 145° C. for 20 minutes to obtain the high-resilience and super-wear-resistant rubber for comprehensive scenarios of the present application.

[0064] Compared with Example 1, Example 2 is different in that the ratio of natural rubber to butadiene rubber is changed from 6:4 to 7:3.

[0065] Compared with Example 1, the difference in Example 3 is that the amount of carbon black is increased from 40 parts to 55 parts.

[0066] Compared with Example 1, the difference of Comparative Example 1 is that the rubber matrix is ​​entirely made of natural rubber.

[0067] Compared with Example 1, the difference of Comparative Example 2 is that the rubber matrix is ​​entirely made of Tianshun butadiene rubber.

[0068] The tensile strength and elongation at break of the comprehensive scenario high-resilience super-wear-resistant rubber obtained in each embodiment and comparative example were measured according to the measurement method in GB / T528-2009 "Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber". The wear of the comprehensive scenario high-resilience super-wear-resistant rubber obtained in each embodiment and comparative example was measured according to the measurement method in GB / T1689-2014 "Determination of wear resistance of vulcanized rubber (using Akron abrasion tester)". The rebound resilience of the comprehensive scenario high-resilience super-wear-resistant rubber obtained in each embodiment and comparative example was measured according to the measurement method in GB / T1681-1991 "GB / T 1681-1991 Determination of rebound resilience of vulcanized rubber". The measurement results are shown in Table 1.

[0069] Table 1: Comprehensive scenario high-resilience and super-wear-resistant rubber performance test results prepared in Examples 1-3 and Comparative Examples 1-2.

[0070]

[0071] Compared with Example 1, Examples 2 and 3 changed the ratio of butadiene rubber to carbon black N220. As a result, their Akron abrasion, elongation at break and resilience were not as good as those of Example 1, indicating that the rubber compound of Example 1 cooperated better with the system.

[0072] Compared with Example 1, Comparative Example 1-2 changed the rubber system, and the wear properties such as elongation at break, Akron abrasion, and rebound resilience were not as good as those of Example 1, indicating that the high-rebound super-wear-resistant rubber of the comprehensive scenario formula of Example 1 has exerted the advantages of natural rubber and butadiene rubber and maintained excellent wear resistance.

[0073] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A high-resilience and super-wear-resistant rubber for comprehensive scenarios, characterized in that: The invention comprises the following components: natural rubber: 20-80 parts, butadiene rubber: 20-80 parts, activator: 3-9 parts, antioxidant: 1-3 parts, reinforcing agent: 20-50 parts, paraffin: 1.5 parts, cyclohexane oil: 2-5 parts, accelerator: 0.8-1.5 parts, vulcanizing agent: 0.8-1.5 parts, polyethylene glycol: 1-8 parts, hydrogenated castor oil: 3-5 parts and coumarone resin: 3-6 parts.

2. The high-resilience and super-wear-resistant rubber for comprehensive scenarios according to claim 1, characterized in that: The mixing ratio of the natural rubber to the butadiene rubber is 0.5-1.

5.

3. The comprehensive scenario high-resilience super-wear-resistant rubber according to claim 1, characterized in that: The activator is one or more of zinc oxide and stearic acid.

4. The comprehensive scenario high-resilience super-wear-resistant rubber according to claim 1, characterized in that: The reinforcing agent is one or a mixture of carbon black N220 or carbon black N330.

5. The comprehensive scenario high-resilience super-wear-resistant rubber according to claim 1, characterized in that: The antioxidant is N-isopropyl-N'-phenyl-p-phenylenediamine.

6. The comprehensive scenario high-resilience super-wear-resistant rubber according to claim 1, characterized in that: The accelerator is N-cyclohexyl-2-benzothiazole sulfenamide.

7. The comprehensive scenario high-resilience super-wear-resistant rubber according to claim 1, characterized in that: The vulcanizing agent is sulfur.

8. The comprehensive scenario high-resilience super-wear-resistant rubber according to claim 1, characterized in that: The molecular weight of the polyethylene glycol is 4000.

9. The method for preparing the comprehensive scenario high-resilience super-wear-resistant rubber according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step S1, raw material preparation stage, natural rubber and butadiene rubber are plasticized and mixed on an open mill, and compounding agents such as activator, antioxidant and reinforcing agent are weighed in proportion for standby use. Step S2, mixing preparation stage, adding the rubber material mixed in step S1 to the compounding agent and mixing in a mixer, the mixing temperature is 50-120°C, the mixing time is 10min-25min, and the vulcanizing agent is added after the temperature is lowered to 60°C. Step S3, vulcanization stage, vulcanize the mixed rubber prepared in step S2 on a vulcanizer, the vulcanization temperature is 130-160° C., the vulcanization time is 10-15 min, and the vulcanization pressure is 14 MPa.

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