阅读说明：本技术 一种耐磨耐高温材料的制备方法 (Preparation method of wear-resistant and high-temperature-resistant material ) 是由 王佩洁 于 2019-10-31 设计创作，主要内容包括：本发明公开了一种耐磨耐高温材料的制备方法,具体涉及新型材料制备领域,中所使用的主料包括以下重量份数的原料：丙烯酸酯橡胶80-120份、硬脂酸0.8-1.4份、炭黑17-25份、氧化锌4-6份、硫磺0.5-1.8份、蒙脱土10-20份,具体加工步骤如下：准备原料、粉碎原料、一轮炼制、二轮炼制和胚料硫化。本发明加入蒙脱土及对制备方法的优化,可得到使用寿命更持久的橡胶材料,以保证持续起到密封效果,且在保证复合材料耐磨和耐高温特性的前提下,可有效保留丙烯酸酯橡胶的拉伸强度,不会因为蒙脱土的加入造成丙烯酸酯橡胶的受力变形而不发生损坏的特性改变。(The invention discloses a preparation method of a wear-resistant and high-temperature-resistant material, and particularly relates to the field of novel material preparation, wherein the used main materials comprise the following raw materials in parts by weight: 80-120 parts of acrylate rubber, 0.8-1.4 parts of stearic acid, 17-25 parts of carbon black, 4-6 parts of zinc oxide, 0.5-1.8 parts of sulfur and 10-20 parts of montmorillonite, and the specific processing steps are as follows: preparing raw materials, crushing the raw materials, carrying out one-time refining, carrying out two-time refining and vulcanizing the blank. The invention adds the montmorillonite and optimizes the preparation method, so that the rubber material with longer service life can be obtained, the sealing effect can be ensured to be continuously achieved, the tensile strength of the acrylate rubber can be effectively kept on the premise of ensuring the wear-resisting and high-temperature-resisting properties of the composite material, and the property change that the acrylate rubber is not damaged due to the stress deformation caused by the addition of the montmorillonite can be avoided.)

1. A wear-resistant high-temperature-resistant material is characterized in that: the used main materials comprise the following raw materials in parts by weight: 80-120 parts of acrylate rubber, 0.8-1.4 parts of stearic acid, 17-25 parts of carbon black, 4-6 parts of zinc oxide, 0.5-1.8 parts of sulfur and 10-20 parts of montmorillonite.

2. A wear-resistant and high-temperature-resistant material according to claim 1, wherein: the used main materials comprise the following raw materials in parts by weight: 120 parts of acrylate rubber, 1 part of stearic acid, 21 parts of carbon black, 5 parts of zinc oxide, 1.2 parts of sulfur and 10 parts of montmorillonite.

3. A wear-resistant and high-temperature-resistant material according to claim 1, wherein: the used main materials comprise the following raw materials in parts by weight: 100 parts of acrylate rubber, 1 part of stearic acid, 21 parts of carbon black, 5 parts of zinc oxide, 1.2 parts of sulfur and 15 parts of montmorillonite.

4. A wear-resistant and high-temperature-resistant material according to claim 1, wherein: the used main materials comprise the following raw materials in parts by weight: 80 parts of acrylate rubber, 1 part of stearic acid, 21 parts of carbon black, 5 parts of zinc oxide, 1.2 parts of sulfur and 20 parts of montmorillonite.

5. A wear and temperature resistant material according to any one of claims 1-4, characterized in that: the preparation method of the wear-resistant and high-temperature-resistant material comprises the following specific processing steps:

s1, preparing raw materials: preparing acrylate rubber, stearic acid, carbon black, zinc oxide, sulfur and montmorillonite according to a proportion;

s2, crushing raw materials: putting the acrylate rubber into a crusher, crushing to obtain granular raw materials, and respectively grinding montmorillonite and sulfur to obtain powdery raw materials;

s3, one-round refining: putting the acrylic rubber granular raw material obtained in the step S2 and the stearic acid, the carbon black and the zinc oxide prepared in the step S1 into an internal mixer for mixing to obtain a round of blank, and cooling and standing after blanking;

s4, two rounds of refining: putting the blank of the first round obtained in the step S3 back into the internal mixer again, adding the powdery montmorillonite obtained in the step S2, mixing again to obtain blank of the second round, and cooling and placing after sheet discharging;

s5, vulcanizing the blank: and (4) adding the two rounds of blanks obtained in the step (S4) into an open mill, adding the prepared sulfur powder in the step (S2), vulcanizing the blanks to obtain vulcanized blanks, tabletting, cooling and standing to room temperature.

6. The method for preparing the wear-resistant and high-temperature-resistant material according to claim 5, wherein the method comprises the following steps: the mixing conditions in the one-round refining step are as follows: the temperature range is set to be 100-125 ℃, the rotating speed is set to be 50r/min, and the mixing duration is set to be 5-7 min.

7. The method for preparing the wear-resistant and high-temperature-resistant material according to claim 5, wherein the method comprises the following steps: the mixing conditions in the two-round refining steps are as follows: the temperature range is set to 145-165 ℃, the rotating speed is set to 60r/min, and the mixing duration is set to 30-35 min.

8. The method for preparing the wear-resistant and high-temperature-resistant material according to claim 5, wherein the method comprises the following steps: the vulcanization tabletting condition in the blank vulcanization step is as follows: vulcanization was carried out at 75 ℃ for 9 minutes, 5 times with degassing at the start of vulcanization, and the tablet cooling time was set to 4-8 hours.

Technical Field

The invention relates to the technical field of novel material preparation, in particular to a preparation method of a wear-resistant and high-temperature-resistant material.

Background

Acrylate rubber (hereinafter referred to as ACM) is an elastomer obtained by copolymerizing acrylate as a main monomer, wherein a main chain of the elastomer is a saturated carbon chain, and a side group of the elastomer is a polar ester group. Due to the special structure, the rubber has many excellent characteristics such as heat resistance, aging resistance, oil resistance, ozone resistance, ultraviolet resistance and the like, the mechanical property and the processing property are superior to those of fluororubber and silicone rubber, and the heat resistance, the aging resistance and the oil resistance are superior to those of nitrile rubber. The ACM is widely applied to various high-temperature and oil-resistant environments, and becomes a sealing material which is intensively developed and popularized in the automobile industry in recent years, in particular to a high-temperature-resistant oil seal, a crankshaft, a valve rod, a cylinder gasket, a hydraulic oil delivery pipe and the like for automobiles.

Montmorillonite (also known as montmorillonite or microcrystalline kaolinite) is a natural mineral of silicate, and is the main mineral component of bentonite ore. Containing Al₂O₃16.54%；MgO4.65%； SiO₂50.95 percent. Structural formula is (Al, Mg)₂〔SiO10〕(OH)₂·n H₂And O. Monoclinic system, multi-site microcrystals, aggregates in the form of soil, spheres, etc. White, slightly grayish, yellowish, greenish, bluish when containing impurities, earthy luster or dull luster, and slippery feel. After adding water, it can expand several times its volume and become a paste. The volume of the product shrinks after heated dehydration. Has strong adsorption capacity and cation exchange performance, and is mainly produced in the weathering crust of volcanic tuff. Montmorillonite (including calcium-based, sodium-calcium-based, magnesium-based montmorillonite) is peeled, dispersed, purified, modified, ultra-fine graded, and special organically compounded, with average wafer thickness less than 25nm, and can be used as bleaching agent and adsorbent filler, and is called "universal material".

The acrylate rubber is long used for preparing sealing gaskets for automobiles or factories due to the unique property of the acrylate rubber, and nitrogen often deforms at a high temperature or is excessively abraded due to the fact that the contact surface is hard, so that the sealing effect cannot be continuously achieved.

Disclosure of Invention

In order to overcome the above defects in the prior art, embodiments of the present invention provide a method for preparing a wear-resistant and high-temperature-resistant material, and a rubber material with a longer service life can be obtained by adding montmorillonite and optimizing the preparation method, so as to ensure that a sealing effect is continuously achieved.

In order to achieve the purpose, the invention provides the following technical scheme: the wear-resistant high-temperature-resistant material comprises the following main materials in parts by weight: 80-120 parts of acrylate rubber, 0.8-1.4 parts of stearic acid, 17-25 parts of carbon black, 4-6 parts of zinc oxide, 0.5-1.8 parts of sulfur and 10-20 parts of montmorillonite.

In a preferred embodiment, the used main materials comprise the following raw materials in parts by weight: 120 parts of acrylate rubber, 1 part of stearic acid, 21 parts of carbon black, 5 parts of zinc oxide, 1.2 parts of sulfur and 10 parts of montmorillonite.

In a preferred embodiment, the used main materials comprise the following raw materials in parts by weight: 100 parts of acrylate rubber, 1 part of stearic acid, 21 parts of carbon black, 5 parts of zinc oxide, 1.2 parts of sulfur and 15 parts of montmorillonite.

In a preferred embodiment, the used main materials comprise the following raw materials in parts by weight: 80 parts of acrylate rubber, 1 part of stearic acid, 21 parts of carbon black, 5 parts of zinc oxide, 1.2 parts of sulfur and 20 parts of montmorillonite.

The invention also discloses a preparation method of the wear-resistant high-temperature-resistant material, which comprises the following specific processing steps:

s1, preparing raw materials: preparing acrylate rubber, stearic acid, carbon black, zinc oxide, sulfur and montmorillonite according to a proportion;

s2, crushing raw materials: putting the acrylate rubber into a crusher, crushing to obtain granular raw materials, and respectively grinding montmorillonite and sulfur to obtain powdery raw materials;

s3, one-round refining: putting the acrylic rubber granular raw material obtained in the step S2 and the stearic acid, the carbon black and the zinc oxide prepared in the step S1 into an internal mixer for mixing to obtain a round of blank, and cooling and standing after blanking;

s4, two rounds of refining: putting the blank of the first round obtained in the step S3 back into the internal mixer again, adding the powdery montmorillonite obtained in the step S2, mixing again to obtain blank of the second round, and cooling and placing after sheet discharging;

s5, vulcanizing the blank: and (4) adding the two rounds of blanks obtained in the step (S4) into an open mill, adding the prepared sulfur powder in the step (S2), vulcanizing the blanks to obtain vulcanized blanks, tabletting, cooling and standing to room temperature.

In a preferred embodiment, the mixing conditions in the one round of refining step are: the temperature range is set to be 100-125 ℃, the rotating speed is set to be 50r/min, and the mixing duration is set to be 5-7 min.

In a preferred embodiment, the mixing conditions in the two-round refining step are: the temperature range is set to 145-165 ℃, the rotating speed is set to 60r/min, and the mixing duration is set to 30-35 min.

In a preferred embodiment, the green material vulcanization step is conducted under the vulcanization press conditions: vulcanization was carried out at 75 ℃ for 9 minutes, 5 times with degassing at the start of vulcanization, and the tablet cooling time was set to 4-8 hours.

The invention has the technical effects and advantages that:

1. the invention prepares novel rubber from acrylate rubber and montmorillonite, because the montmorillonite is a monoclinic system, each crystal layer is composed of 1 layer of aluminum (magnesium) oxygen (hydroxyl) octahedron sheet and 2 layers of silicon oxygen tetrahedron sheet through covalent bonds (2: 1 type), a plurality of crystal layers jointly form a clay particle, the clay is formed by overlapping the crystal layers in a unique mode, the specific gravity of oxygen contained on the surface of the crystal layer forming the clay particle is larger, the adjacent crystal layers contain negative charges, so that positive ions are easily combined, crystal layers are arranged into a very compact structure due to the common positive ions, thereby causing that the clay sheet layer is difficult to open by the mechanical shearing force generated in the ordinary polymer machining process, after the clay sheet layer is added into the acrylate rubber, the abrasion resistance and the high-temperature resistance of the rubber can be effectively enhanced, so that the service life of the composite rubber is effectively ensured;

2. the invention has the advantages that through the synthesis of the acrylate rubber and the montmorillonite, the montmorillonite plays a role in filling and reinforcing in the acrylate rubber matrix, and because the dispersion condition of the montmorillonite is better, the montmorillonite can generate a stronger effect with the macromolecular chain of the acrylate rubber, when a sample is subjected to an external force, the montmorillonite can be used as a stress bearing point to disperse the stress, so the addition of the montmorillonite can ensure the stronger tensile strength of the acrylate rubber, on the premise of ensuring the wear resistance and high temperature resistance of the composite material, the tensile strength of the acrylate rubber can be effectively maintained, and the characteristic change that the acrylate rubber is not damaged due to stress deformation caused by the addition of the montmorillonite can be avoided.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.