Water mill rubber plastic polishing material and its preparation method

Abstract

This invention specifically relates to a water-polished rubber-plastic material and its preparation method. The water-polished rubber-plastic material comprises 15-25 parts EVA, 12-20 parts EPDM, 14-20 parts polyethylene, 10-18 parts natural rubber, 4-10 parts nitrile rubber, 30-45 parts abrasive, 2-4 parts antioxidant, 2-6 parts foaming agent, 2-6 parts silane coupling agent, and 0.2-0.5 parts vulcanizing agent. The water-polished rubber-plastic material possesses excellent mechanical properties, wear resistance, high-temperature resistance, and corrosion resistance, contributing to improved durability and polishing effect. The preparation method is stable, easy to operate and control, and has high production efficiency, facilitating industrial production.

Description

Technical Field

[0001] This invention relates to the field of polishing materials technology, specifically to a water-polished rubber and plastic polishing material and its preparation method. Background Technology

[0002] In industrial production, polishing components such as polishing wheels and polishing pads are frequently used to polish the surfaces of materials such as metals, ceramics, and glass. The material of these polishing components is crucial for achieving refined surface treatment of workpieces and significantly impacts the polishing effect. With increasing demands for high-end manufacturing, precision machining, and environmental protection, the market has placed higher demands on the wear resistance, high-temperature stability, and corrosion resistance of polishing components. However, existing polishing wheel materials have limitations in terms of wear resistance, high-temperature resistance, and corrosion resistance, resulting in a short service life. Frequent replacements in actual production not only increase production costs but also hinder production efficiency. Therefore, developing an environmentally friendly polishing wheel material with excellent wear resistance, high-temperature resistance, and corrosion resistance is of great significance. Summary of the Invention

[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this invention is to provide a water-polished rubber and plastic polishing material, which has good mechanical properties, wear resistance, high temperature resistance and corrosion resistance, and helps to improve durability and polishing effect.

[0004] Another objective of this invention is to provide a method for preparing water-polished rubber and plastic parts. The preparation method is stable, easy to operate and control, has high production efficiency, and is conducive to industrial production.

[0005] The objective of this invention is achieved through the following technical solution: a water-polished rubber-plastic material, comprising 15-25 parts EVA, 12-20 parts EPDM, 14-20 parts polyethylene, 10-18 parts natural rubber, 4-10 parts nitrile rubber, 30-45 parts abrasive, 3-6 parts compatibilizer, 2-4 parts antioxidant, 2-6 parts foaming agent, 2-6 parts silane coupling agent, and 0.2-0.5 parts vulcanizing agent.

[0006] This invention combines a rubber system consisting of EVA, polyethylene, EPDM, natural rubber, and nitrile rubber, along with additives such as antioxidants, foaming agents, and silane coupling agents, to form a polymer matrix that provides support and protection for the abrasive. The abrasive, possessing high hardness and wear resistance, is uniformly dispersed within the polymer matrix. During polishing, it can withstand significant pressure and friction, effectively performing grinding and polishing. The polymer matrix is ​​firmly bonded to itself, resulting in a water-polished rubber-plastic polishing material with excellent mechanical properties, wear resistance, high-temperature resistance, and corrosion resistance. Furthermore, the polishing material has a porous structure, allowing for the storage and release of polishing material, effectively improving polishing efficiency and quality.

[0007] Furthermore, the polyethylene is low-density polyethylene.

[0008] Furthermore, the antioxidant is at least one of hindered phenolic antioxidants and phosphite antioxidants.

[0009] Furthermore, the foaming agent is at least one selected from azodicarbonamide, 4,4'-oxobisbenzenesulfonyl hydrazine, p-toluenesulfonyl hydrazine, and sodium bicarbonate.

[0010] Furthermore, the foaming agent is composed of azodicarbonamide, p-toluenesulfonyl hydrazine, and sodium bicarbonate in a weight ratio of 2-4:0.5-1.5:0.5-1.5.

[0011] Furthermore, the vulcanizing agent is at least one selected from dicumyl peroxide, di-tert-butyl peroxide, bis-(tert-butylperoxyisopropyl)benzene, and triallyl isocyanurate.

[0012] Furthermore, the silane coupling agent is at least one selected from γ-aminopropyltriethoxysilane, γ-methacryloxypropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, and vinyltrimethoxysilane.

[0013] Furthermore, the compatibilizer is at least one of maleic anhydride-grafted polyethylene, maleic anhydride-grafted polypropylene, and styrene-ethylene-butene-styrene block copolymer.

[0014] Furthermore, the abrasive is at least one of diamond and silicon carbide, and the particle size of the abrasive is 20-40 μm.

[0015] Another objective of this invention is achieved through the following technical solution: a method for preparing the above-mentioned environmentally friendly polishing material made of rubber and plastic, comprising the following steps:

[0016] (1) Add EVA, EPDM, polyethylene and compatibilizer to a mixer for mixing, then add plasticized natural rubber and nitrile rubber mixture and vulcanizing agent for mixing to obtain compound one;

[0017] (2) Add abrasive that has been activated by silane coupling agent to rubber compound one, and add foaming agent and antioxidant, and then mix to obtain rubber compound two;

[0018] (3) Place the second rubber compound in the mold for molding, and then cool and demold to obtain the third rubber compound;

[0019] (4) Place the rubber material in an oven for heat treatment, and then perform surface finishing to make its size and surface quality meet the requirements, thus obtaining polished part material.

[0020] Furthermore, in step (1), EVA, EPDM, polyethylene and compatibilizer are added to a mixer for mixing at a mixing temperature of 115-125℃ and a mixing time of 2-6 minutes. Then, a plasticized mixture of natural rubber and nitrile rubber and a vulcanizing agent are added for mixing at a mixing temperature of 115-125℃ and a mixing time of 5-10 minutes to obtain compound one.

[0021] Furthermore, in step (1), the plasticizing method for the mixture of natural rubber and nitrile rubber includes the following steps: placing natural rubber and nitrile rubber in an open mill for plasticizing, controlling the roll gap to 0.5-1 mm, the roll temperature to 60-70℃, the rotation speed to 30-40 rpm, and the plasticizing time to 8-15 min. This invention, by plasticizing natural rubber and nitrile rubber, can reduce the elasticity of the rubber, increase its plasticity and fluidity, and allow it to be uniformly mixed with other raw materials, thereby improving the processing performance of the rubber.

[0022] Furthermore, in step (2), the temperature of the first rubber compound system is adjusted to 95-105℃, and abrasives that have been activated by silane coupling agent are added, along with foaming agent and antioxidant. Then, the mixture is kneaded for 5-10 minutes to obtain the second rubber compound.

[0023] Furthermore, in step (2), the abrasive is at least one of diamond and silicon carbide. The method for activating the abrasive using a silane coupling agent includes the following steps: mixing the abrasive and the silane coupling agent uniformly in a certain proportion, at a mixing temperature of 95-105℃, a rotation speed of 1000-1500 rpm, and a mixing time of 10-20 min. This invention, by activating the abrasive using the above method, can form active groups on the surface of the abrasive, thereby improving the compatibility and bonding force between the abrasive and the polymer matrix.

[0024] Furthermore, in step (3), the second rubber compound is placed in the mold, the mold temperature is controlled at 140-150℃, the pressure is controlled at 5-10MPa, and the first molding is performed for 3-10 minutes; then the mold temperature is controlled at 165-175℃, the pressure is controlled at 10-15MPa, and the second molding is performed for 10-20 minutes. The first molding uses a lower temperature and pressure to perform preliminary molding and degassing of the rubber compound, so that the rubber compound is initially formed, while avoiding premature decomposition of the foaming agent; the second molding increases the temperature and pressure, and the vulcanizing agent can promote the full cross-linking of rubber molecules to form a stable three-dimensional network structure, improving the strength and heat resistance of the material; the foaming agent is fully decomposed to form a uniform cell structure, so that the polished part material has good flexibility and cushioning performance.

[0025] Furthermore, in step (3), the molded rubber compound is cooled to 50-60°C and then demolded. Cooling the molded rubber compound before demolding helps improve the dimensional stability of the product.

[0026] Furthermore, in step (4), the rubber compound is placed in an oven for heat treatment at a temperature of 80-90°C for 20-28 hours.

[0027] The preparation method of the water-polished rubber and plastic environmentally friendly polishing material of the present invention, through the design of process steps and the control of process parameters of each step, achieves good combination and synergistic effect of each raw material, so that the prepared water-polished rubber and plastic polishing material has good wear resistance, high temperature resistance and corrosion resistance, as well as good mechanical properties and dimensional stability.

[0028] The beneficial effects of this invention are as follows: This invention combines a rubber system formed by EVA, polyethylene, EPDM, natural rubber, and nitrile rubber, and incorporates additives such as antioxidants, foaming agents, and silane coupling agents to form a polymer matrix, providing support and protection for the abrasive. The abrasive has high hardness and wear resistance, and is uniformly dispersed in the polymer matrix. During polishing, it can withstand significant pressure and friction, effectively performing grinding and polishing. The polymer matrix is ​​firmly bonded to itself, resulting in a water-polished rubber-plastic polishing material with excellent mechanical properties, wear resistance, high-temperature resistance, and corrosion resistance. Furthermore, the polishing material has a porous structure, allowing it to store and release polishing fluid, effectively improving polishing efficiency and quality. The preparation method of the polishing material is stable, easy to operate and control, and has high production efficiency, facilitating industrial production. Detailed Implementation

[0029] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments. The content mentioned in the embodiments is not intended to limit the present invention.

[0030] In some embodiments of the present invention, a water-polished rubber-plastic material comprises the following raw materials in parts by weight: 15-25 parts EVA, 12-20 parts EPDM, 14-20 parts polyethylene, 10-18 parts natural rubber, 4-10 parts nitrile rubber, 30-45 parts abrasive, 3-6 parts compatibilizer, 2-4 parts antioxidant, 2-6 parts foaming agent, 2-6 parts silane coupling agent, and 0.2-0.5 parts vulcanizing agent.

[0031] In some embodiments of the present invention, the polyethylene is low-density polyethylene, specifically BASF Yangzi PE 2426H low-density polyethylene (LDPE). The EVA is ExxonMobil EVA Ultra LD 727.22.

[0032] In some embodiments of the present invention, the antioxidant is at least one of hindered phenolic antioxidants and phosphite antioxidants.

[0033] In some embodiments of the present invention, the antioxidant is composed of antioxidant 1010 and antioxidant 168 in a weight ratio of 1-2:1.

[0034] In some embodiments of the present invention, the foaming agent is at least one selected from azodicarbonamide, 4,4'-oxobisbenzenesulfonyl hydrazine, p-toluenesulfonyl hydrazine, and sodium bicarbonate.

[0035] In some embodiments of the present invention, the foaming agent is composed of 4,4'-oxobisbenzenesulfonyl hydrazine and sodium bicarbonate in a weight ratio of 2-4:1-2.

[0036] In some embodiments of the present invention, the vulcanizing agent is at least one selected from dicumyl peroxide, di-tert-butyl peroxide, bis-(tert-butylperoxyisopropyl)benzene, and triallyl isocyanurate.

[0037] In some embodiments of the present invention, the silane coupling agent is at least one selected from γ-aminopropyltriethoxysilane, γ-methacryloxypropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, and vinyltrimethoxysilane.

[0038] In some embodiments of the present invention, the compatibilizer is at least one of maleic anhydride-grafted polyethylene, maleic anhydride-grafted polypropylene, and styrene-ethylene-butene-styrene block copolymer.

[0039] In some embodiments of the present invention, the abrasive is at least one of diamond and silicon carbide, and the particle size of the abrasive is 20-40 μm.

[0040] In some embodiments of the present invention, a method for preparing the above-mentioned environmentally friendly polishing material made of rubber and plastic includes the following steps:

[0041] (1) Add EVA, EPDM, polyethylene and compatibilizer to a mixer for mixing, then add plasticized natural rubber and nitrile rubber mixture and vulcanizing agent for mixing to obtain compound one;

[0042] (2) Add abrasive that has been activated by silane coupling agent to rubber compound one, and add foaming agent and antioxidant, and then mix to obtain rubber compound two;

[0043] (3) Place the second rubber compound in the mold for molding, and then cool and demold to obtain the third rubber compound;

[0044] (4) Place the rubber material in an oven for heat treatment, and then perform surface finishing to make its size and surface quality meet the requirements, thus obtaining polished part material.

[0045] In some embodiments of the present invention, in step (1), EVA, EPDM, polyethylene and compatibilizer are added to a mixer for mixing at a mixing temperature of 115-125°C, a speed of 40 rpm and a mixing time of 2-6 min. Then, a plasticized mixture of natural rubber and nitrile rubber and a vulcanizing agent are added for mixing at a mixing temperature of 115-125°C and a mixing time of 5-10 min to obtain compound one.

[0046] In some embodiments of the present invention, in step (1), the plasticizing method of the mixture of natural rubber and nitrile rubber includes the following steps: placing natural rubber and nitrile rubber in an open mill for plasticizing, controlling the roll gap to be 0.5-1mm, controlling the roll temperature to be 60-70℃, and plasticizing time to be 8-15min.

[0047] In some embodiments of the present invention, in step (2), the temperature of the first rubber compound system is adjusted to 95-105°C, abrasive material pre-activated by silane coupling agent is added, along with foaming agent and antioxidant, and then the mixture is kneaded for 5-10 minutes to obtain the second rubber compound.

[0048] In some embodiments of the present invention, in step (2), the abrasive is at least one of diamond and silicon carbide, and the method of activating the abrasive with a silane coupling agent includes the following steps: mixing the abrasive and the silane coupling agent in a certain proportion, the mixing temperature is 95-105℃, the rotation speed is 1000-1500rpm, and the mixing time is 10-20min.

[0049] In some embodiments of the present invention, in step (3), the second adhesive compound is placed in a mold, the mold temperature is controlled at 140-150℃, the pressure is controlled at 5-10MPa, and a first molding is performed for 3-10 minutes; then the mold temperature is controlled at 165-175℃, the pressure is controlled at 10-15MPa, and a second molding is performed for 10-20 minutes.

[0050] Furthermore, in step (3), the molded rubber compound is cooled to 50-60°C and then demolded.

[0051] Furthermore, in step (4), the rubber compound is placed in an oven for heat treatment at a temperature of 80-90°C for 20-28 hours.

[0052] Example 1

[0053] This embodiment provides a water-polished rubber and plastic polishing material, comprising the following raw materials in parts by weight: 20 parts EVA, 14 parts EPDM, 16 parts polyethylene, 12 parts natural rubber, 6 parts nitrile rubber, 35 parts abrasive, 4 parts compatibilizer, 3 parts antioxidant, 4 parts foaming agent, 4 parts silane coupling agent, and 0.45 parts vulcanizing agent.

[0054] In this embodiment, the EVA used is ExxonMobil EVA Ultra LD 727.22. The Jilin Petrochemical company uses Jilin Petrochemical EPDM 4045. The polyethylene used is BASF Yangzi PE 2426H low-density polyethylene. The natural rubber used is Vietnamese 3L rubber with an impurity content of <0.05%. The nitrile rubber used is Jilin Petrochemical nitrile rubber 3305. The compatibilizer used is Dow maleic anhydride grafted polyethylene TY 1355.

[0055] Furthermore, the antioxidant is composed of antioxidant 1010 and antioxidant 168 in a weight ratio of 1.5:1.

[0056] Furthermore, the foaming agent is composed of 4,4'-oxobisbenzenesulfonyl hydrazine and sodium bicarbonate in a weight ratio of 2:1.

[0057] Furthermore, the vulcanizing agent is composed of dicumyl peroxide and triallyl isocyanurate in a weight ratio of 4:1. The silane coupling agent is γ-aminopropyltriethoxysilane.

[0058] Furthermore, the abrasive is diamond, and the particle size of the abrasive is 20-40 μm.

[0059] This embodiment also provides a method for preparing the above-mentioned environmentally friendly polishing material made of rubber and plastic, including the following steps:

[0060] (1) Add EVA, EPDM, polyethylene and compatibilizer to a mixer for mixing, then add plasticized natural rubber and nitrile rubber mixture and vulcanizing agent for mixing to obtain compound one;

[0061] (2) Add abrasive that has been activated by silane coupling agent to rubber compound one, and add foaming agent and antioxidant, and then mix to obtain rubber compound two;

[0062] (3) Place the second rubber compound in the mold for molding, and then cool and demold to obtain the third rubber compound;

[0063] (4) Place the rubber material in an oven for heat treatment, and then perform surface finishing to make its size and surface quality meet the requirements, thus obtaining polished part material.

[0064] Furthermore, in step (1), EVA, EPDM, polyethylene and compatibilizer are added to a mixer for mixing at a mixing temperature of 120°C, a speed of 40 rpm and a mixing time of 4 min. Then, a plasticized mixture of natural rubber and nitrile rubber and a vulcanizing agent are added for mixing at a mixing temperature of 120°C and a mixing time of 5-10 min to obtain compound one.

[0065] Furthermore, in step (1), the plasticizing method of the natural rubber and nitrile rubber mixture includes the following steps: placing the natural rubber and nitrile rubber in an open mill for plasticizing, controlling the roll gap to 0.5 mm, controlling the roll temperature to 65 °C, and plasticizing time to 10 min.

[0066] Furthermore, in step (2), the temperature of the first rubber compound system is adjusted to 100°C, and abrasives that have been activated by silane coupling agent are added, along with foaming agent and antioxidant. Then, the mixture is kneaded for 8 minutes to obtain the second rubber compound.

[0067] Furthermore, in step (2), the abrasive is at least one of diamond and silicon carbide, and the method of activating the abrasive with silane coupling agent includes the following steps: mixing the abrasive and silane coupling agent in proportion, mixing at 100°C, rotating at 1200 rpm, and mixing for 12 min.

[0068] Furthermore, in step (3), the second rubber compound is placed in the mold, the mold temperature is controlled at 145°C, the pressure is controlled at 8MPa, and the first molding is performed for 5 minutes; then the mold temperature is controlled at 170°C, the pressure is controlled at 12MPa, and the second molding is performed for 10 minutes.

[0069] Furthermore, in step (3), the molded rubber compound is cooled to 55°C and then demolded.

[0070] Furthermore, in step (4), the rubber compound is placed in an oven for heat treatment at a temperature of 85°C for 24 hours.

[0071] Example 2

[0072] This embodiment provides a water-polished rubber and plastic polishing material, comprising the following raw materials in parts by weight: 20 parts EVA, 14 parts EPDM, 16 parts polyethylene, 10 parts natural rubber, 8 parts nitrile rubber, 35 parts abrasive, 4 parts compatibilizer, 3 parts antioxidant, 4 parts foaming agent, 4 parts silane coupling agent, and 0.45 parts vulcanizing agent.

[0073] Furthermore, the antioxidant is composed of antioxidant 1010 and antioxidant 168 in a weight ratio of 1:1.

[0074] Furthermore, the foaming agent is composed of 4,4'-oxobisbenzenesulfonyl hydrazine and sodium bicarbonate in a weight ratio of 2:1.

[0075] Furthermore, the vulcanizing agent is composed of dicumyl peroxide and triallyl isocyanurate in a weight ratio of 4:1. The silane coupling agent is γ-aminopropyltriethoxysilane.

[0076] Furthermore, the abrasive is diamond, and the particle size of the abrasive is 20-40 μm.

[0077] This embodiment also provides a method for preparing the above-mentioned environmentally friendly polishing material made of rubber and plastic, including the following steps:

[0078] (1) Add EVA, EPDM, polyethylene and compatibilizer to a mixer for mixing, then add plasticized natural rubber and nitrile rubber mixture and vulcanizing agent for mixing to obtain compound one;

[0079] (2) Add abrasive that has been activated by silane coupling agent to rubber compound one, and add foaming agent and antioxidant, and then mix to obtain rubber compound two;

[0080] (3) Place the second rubber compound in the mold for molding, and then cool and demold to obtain the third rubber compound;

[0081] (4) Place the rubber material in an oven for heat treatment, and then perform surface finishing to make its size and surface quality meet the requirements, thus obtaining polished part material.

[0082] Furthermore, in step (1), EVA, EPDM, polyethylene and compatibilizer are added to a mixer for mixing at a mixing temperature of 120°C, a speed of 40 rpm and a mixing time of 4 min. Then, a plasticized mixture of natural rubber and nitrile rubber and a vulcanizing agent are added for mixing at a mixing temperature of 120°C and a mixing time of 5-10 min to obtain compound one.

[0083] Furthermore, in step (1), the plasticizing method of the natural rubber and nitrile rubber mixture includes the following steps: placing the natural rubber and nitrile rubber in an open mill for plasticizing, controlling the roll gap to 0.5 mm, controlling the roll temperature to 65 °C, and plasticizing time to 10 min.

[0084] Furthermore, in step (2), the temperature of the first rubber compound system is adjusted to 100°C, and abrasives that have been activated by silane coupling agent are added, along with foaming agent and antioxidant. Then, the mixture is kneaded for 8 minutes to obtain the second rubber compound.

[0085] Furthermore, in step (2), the abrasive is at least one of diamond and silicon carbide, and the method of activating the abrasive with silane coupling agent includes the following steps: mixing the abrasive and silane coupling agent in proportion, mixing at 100°C, rotating at 1200 rpm, and mixing for 12 min.

[0086] Furthermore, in step (3), the second rubber compound is placed in the mold, the mold temperature is controlled at 145°C, the pressure is controlled at 8MPa, and the first molding is performed for 5 minutes; then the mold temperature is controlled at 170°C, the pressure is controlled at 12MPa, and the second molding is performed for 10 minutes.

[0087] Furthermore, in step (3), the molded rubber material is cooled to 55°C and then demolded.

[0088] Furthermore, in step (4), the rubber compound is placed in an oven for heat treatment at a temperature of 85°C for 24 hours.

[0089] The rest of the content of this embodiment is the same as that of Embodiment 1, and will not be repeated here.

[0090] Example 3

[0091] This embodiment provides a water-polished rubber and plastic polishing material, comprising the following raw materials in parts by weight: 18 parts EVA, 16 parts EPDM, 15 parts polyethylene, 12 parts natural rubber, 6 parts nitrile rubber, 35 parts abrasive, 5 parts compatibilizer, 3 parts antioxidant, 4 parts foaming agent, 4 parts silane coupling agent, and 0.45 parts vulcanizing agent.

[0092] Furthermore, the antioxidant is composed of antioxidant 1010 and antioxidant 168 in a weight ratio of 1:1.

[0093] Furthermore, the foaming agent is composed of 4,4'-oxobisbenzenesulfonyl hydrazine and sodium bicarbonate in a weight ratio of 2:1.

[0094] Furthermore, the vulcanizing agent is composed of dicumyl peroxide and triallyl isocyanurate in a weight ratio of 4:1. The silane coupling agent is composed of γ-methacryloyloxypropyltrimethoxysilane and vinyltrimethoxysilane in a weight ratio of 1:1.

[0095] Furthermore, the abrasive is diamond, and the particle size of the abrasive is 20-40 μm.

[0096] This embodiment also provides a method for preparing the above-mentioned environmentally friendly polishing material made of rubber and plastic, including the following steps:

[0097] (1) Add EVA, EPDM, polyethylene and compatibilizer to a mixer for mixing, then add plasticized natural rubber and nitrile rubber mixture and vulcanizing agent for mixing to obtain compound one;

[0098] (2) Add abrasive that has been activated by silane coupling agent to rubber compound one, and add foaming agent and antioxidant, and then mix to obtain rubber compound two;

[0099] (3) Place the second rubber compound in the mold for molding, and then cool and demold to obtain the third rubber compound;

[0100] (4) Place the rubber material in an oven for heat treatment, and then perform surface finishing to make its size and surface quality meet the requirements, thus obtaining polished part material.

[0101] Furthermore, in step (1), EVA, EPDM, polyethylene and compatibilizer are added to a mixer for mixing at a mixing temperature of 120°C, a speed of 40 rpm and a mixing time of 4 min. Then, a plasticized mixture of natural rubber and nitrile rubber and a vulcanizing agent are added for mixing at a mixing temperature of 120°C and a mixing time of 5-10 min to obtain compound one.

[0102] Furthermore, in step (1), the plasticizing method of the natural rubber and nitrile rubber mixture includes the following steps: placing the natural rubber and nitrile rubber in an open mill for plasticizing, controlling the roll gap to 0.5 mm, controlling the roll temperature to 65 °C, and plasticizing time to 10 min.

[0103] Furthermore, in step (2), the temperature of the first rubber compound system is adjusted to 100°C, and abrasives that have been activated by silane coupling agent are added, along with foaming agent and antioxidant. Then, the mixture is kneaded for 8 minutes to obtain the second rubber compound.

[0104] Furthermore, in step (2), the abrasive is at least one of diamond and silicon carbide, and the method of activating the abrasive with silane coupling agent includes the following steps: mixing the abrasive and silane coupling agent in proportion, mixing at 100°C, rotating at 1200 rpm, and mixing for 12 min.

[0105] Furthermore, in step (3), the second rubber compound is placed in the mold, the mold temperature is controlled at 140°C, the pressure is controlled at 8MPa, and the first molding is performed for 6 minutes; then the mold temperature is controlled at 170°C, the pressure is controlled at 12MPa, and the second molding is performed for 10 minutes.

[0106] Furthermore, in step (3), the molded rubber compound is cooled to 55°C and then demolded.

[0107] Furthermore, in step (4), the rubber compound is placed in an oven for heat treatment at a temperature of 85°C for 24 hours.

[0108] The rest of the content of this embodiment is the same as that of Embodiment 1, and will not be repeated here.

[0109] Comparative Example 1

[0110] The difference between this comparative example and Example 1 is that natural rubber was not added to the water-polished rubber and plastic parts material in this comparative example; instead, an equal amount of EPDM was used as a substitute.

[0111] Comparative Example 2

[0112] The difference between this comparative example and Example 1 is that: no nitrile rubber was added to the water-polished rubber and plastic parts material of this comparative example, and an equal amount of EPDM was used instead.

[0113] Comparative Example 3

[0114] The difference between this comparative example and Example 1 is that polyethylene was not added to the water-polished rubber and plastic parts material in this comparative example; instead, an equal amount of EVA was used as a substitute.

[0115] The water-polished rubber and plastic polishing materials obtained in Examples 1-3 and Comparative Examples 1-3 were trimmed into circular polishing pads with a thickness of 3 mm and a diameter of 150 mm. Performance tests were conducted, and the results are shown in Table 1 below.

[0116]

[0117] Tensile strength is tested according to GB / T 528-2009. Abrasion resistance is tested according to GB / T 9867-2008 to determine the amount of wear. Heat distortion temperature is tested according to GB / T 1634.1-2019. High temperature resistance is tested according to GB / T 3512-2014: the sample is aged in a 150℃ oven for 72 hours, and then conditioned in an environment of 23℃ and 55% RH for 24 hours to test the retention rate of tensile strength. Corrosion resistance is tested according to GB / T 1690-2010: the sample is immersed in 10wt% H2SO4 for 24 hours to determine its corrosion resistance. Compression set is tested according to GB / T7759.1-2015: the test temperature is 23℃ and the humidity is 55% RH. The polishing pads in Examples 1-3 have a porosity of 50-60% and an average pore size of 40-70 μm. The pore structure can be used to store polishing fluid and release it through pressure changes, reducing direct dry friction between the abrasive and the workpiece and helping to improve polishing efficiency.

[0118] In summary, this invention combines a rubber system consisting of EVA, polyethylene, EPDM, natural rubber, and nitrile rubber, and incorporates additives such as antioxidants, foaming agents, and silane coupling agents to form a polymer matrix. The polymer matrix and the abrasive achieve a good bond, resulting in a water-polished rubber-plastic material with excellent mechanical properties, wear resistance, high temperature resistance, and corrosion resistance, as well as low compression set.

[0119] The above embodiments are preferred implementations of the present invention. In addition, the present invention can be implemented in other ways. Any obvious substitutions without departing from the concept of the present invention are within the protection scope of the present invention.

Claims

1. A water-polished rubber-plastic material, characterized in that: The raw materials include the following parts by weight: 15-25 parts EVA, 12-20 parts EPDM, 14-20 parts polyethylene, 10-18 parts natural rubber, 4-10 parts nitrile rubber, 30-45 parts abrasive, 3-6 parts compatibilizer, 2-4 parts antioxidant, 2-6 parts foaming agent, 2-6 parts silane coupling agent, and 0.2-0.5 parts vulcanizing agent; wherein the silane coupling agent is at least one selected from γ-aminopropyltriethoxysilane, γ-methacryloyloxypropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, and vinyltrimethoxysilane.

2. The water-polished rubber and plastic polishing material according to claim 1, characterized in that: The antioxidant is at least one of hindered phenolic antioxidants and phosphite antioxidants.

3. The water-polished rubber and plastic polishing material according to claim 1, characterized in that: The foaming agent is at least one of azodicarbonamide, 4,4'-oxobis(benzenesulfonyl)hydrazine, p-toluenesulfonyl hydrazine, and sodium bicarbonate.

4. The water-polished rubber and plastic polishing material according to claim 1, characterized in that: The vulcanizing agent is at least one of dicumyl peroxide, di-tert-butyl peroxide, bis-(tert-butylperoxyisopropyl)benzene, and triallyl isocyanurate.

5. The water-polished rubber and plastic polishing material according to claim 1, characterized in that: The abrasive is at least one of diamond and silicon carbide, and the particle size of the abrasive is 20-40 μm.

6. A method for preparing a water-polished rubber-plastic part material as described in any one of claims 1-5, characterized in that: Includes the following steps: (1) Add EVA, EPDM, polyethylene and compatibilizer to a mixer for mixing, then add plasticized natural rubber and nitrile rubber mixture and vulcanizing agent for mixing to obtain compound one; (2) Add abrasive that has been activated by silane coupling agent to rubber compound one, and add foaming agent and antioxidant, and then mix to obtain rubber compound two; (3) Place the second rubber compound in the mold for molding, and then cool and demold to obtain the third rubber compound; (4) Place the rubber material in an oven for heat treatment, and then perform surface finishing to obtain polished material.

7. The method for preparing water-polished rubber and plastic parts according to claim 6, characterized in that: In step (1), EVA, LDPE and EPDM are added to a mixer for mixing at a temperature of 115-125℃ for 2-6 minutes. Then, a plasticized mixture of natural rubber and nitrile rubber and a vulcanizing agent are added for mixing at a temperature of 115-125℃ for 5-10 minutes to obtain compound one.

8. The method for preparing water-polished rubber and plastic parts according to claim 6, characterized in that: In step (2), the temperature of the first rubber compound system is adjusted to 95-105℃, and abrasives that have been activated by silane coupling agent are added, along with foaming agent and antioxidant. Then, the mixture is kneaded for 5-10 minutes to obtain the second rubber compound.

9. The method for preparing water-polished rubber and plastic parts according to claim 6, characterized in that: In step (3), the second rubber compound is placed in the mold, the mold temperature is controlled at 140-150℃, the pressure is controlled at 5-10MPa, and the first molding is performed for 3-10 minutes. Then, the mold temperature is controlled at 165-175℃ and the pressure is controlled at 10-15MPa for a second molding, with a holding time of 10-20 minutes.

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