Concrete piston rubber formula for injection process

Abstract

The invention relates to the field of rubber formulas, in particular to a concrete piston rubber formula for an injection process. As an existing rubber formula is not suitable for an injection process, the invention provides a novel formula which can be used for preparing a high-temperature-resistant and corrosion-resistant rubber sealing ring. According to the technical scheme, the rubber comprises the following components in parts by weight: 90-110 parts of nitrile rubber, 3-8 parts of zinc oxide, 0.5-2 parts of stearic acid, 3-8 parts of an anti-aging agent, 60-80 parts of high-abrasion-resistance carbon black, 4-6 parts of liquid butyronitrile, 4-6 parts of dioctyl sebacate, 8-12 parts of special resin, 1-4 parts of a vulcanizing agent, 2-6 parts of an accelerant, 1-4 parts of a dispersing agent and 0.3-0.7 part of a scorch retarder. The formula provided by the invention can solve the problem of incapability of being used for an injection process in the prior art, and has the advantages of high production efficiency and stable product quality.

Description

Technical Field

[0001] The invention relates to the field of rubber formula, in particular to a concrete piston rubber formula used in an injection process. Background Art

[0002] Concrete pistons are common consumable parts for concrete pump trucks. Concrete pistons can be divided into three types according to the material: rubber, polyurethane, and cloth-reinforced rubber. Rubber concrete pistons are widely used in pump trucks due to their low cost and simple manufacturing process. The main function of concrete pistons is to seal and pump concrete. To pump concrete to a height of tens of meters, concrete pistons need to withstand a large pumping pressure, which is generally several megapascals to tens of megapascals. Therefore, the rubber needs to have a higher hardness, usually reaching Shore hardness 80A or higher. Due to the high hardness of rubber, it must also meet performance indicators such as elongation at break and compression permanent deformation. The existing concrete piston rubber formula can only use the molding process, which has low efficiency. At the same time, the product quality is greatly affected by manual discharge, and the scrap rate is high.

[0003] The rubber injection process has the advantages of short molding cycle, high production efficiency, low labor intensity, high product quality, etc. Since the concrete piston requires high rubber hardness and thick concrete piston, the existing rubber formula cannot meet the requirements of the injection process. In order to solve the problem that the existing formula cannot be used for the injection process, the present invention proposes a concrete piston rubber formula for the injection process. Summary of the invention

[0004] The purpose of the present invention is to provide a concrete piston rubber formula for injection technology, which can be used in injection technology while ensuring other properties, and has high production efficiency and stable product quality.

[0005] The purpose of the present invention is achieved through the following technical scheme: the concrete piston rubber injection formula has the following weight distribution ratio: 90-110 parts of nitrile rubber, 3-8 parts of zinc oxide, 0.5-2 parts of stearic acid, 3-8 parts of antioxidant, 60-80 parts of high wear-resistant carbon black, 4-6 parts of liquid nitrile, 4-6 parts of dioctyl sebacate, 8-12 parts of special resin, 1-4 parts of vulcanizing agent, 2-6 parts of accelerator, 1-4 parts of dispersant and 0.3-0.7 parts of scorch retarder.

[0006] Preferably, the weight distribution ratio of the formula is as follows: 100 parts of nitrile rubber, 5 parts of zinc oxide, 1 part of stearic acid, 5 parts of antioxidant, 70 parts of high wear-resistant carbon black, 5 parts of liquid nitrile, 5 parts of dioctyl sebacate, 10 parts of special resin, 2 parts of vulcanizing agent, 3.5 parts of accelerator, 2 parts of dispersant, and 0.5 parts of scorch retarder.

[0007] The beneficial effects of the present invention are:

[0008] The concrete piston rubber formula of the present invention can be used in injection technology under the premise of ensuring other properties, and has high production efficiency and stable product quality. DETAILED DESCRIPTION

[0009] The present invention will be described in detail below in conjunction with embodiments:

[0010] A concrete piston rubber formula for injection technology mainly comprises the following components in proportion by weight: 90-110 parts of nitrile rubber, 3-8 parts of zinc oxide, 0.5-2 parts of stearic acid, 3-8 parts of antioxidant, 60-80 parts of high wear-resistant carbon black, 4-6 parts of liquid nitrile, 4-6 parts of dioctyl sebacate, 8-12 parts of special resin, 1-4 parts of vulcanizer, 2-6 parts of accelerator, 1-4 parts of dispersant and 0.3-0.7 parts of scorch retarder.

[0011] Furthermore, a concrete piston rubber formula for injection technology mainly includes the following weight distribution ratio: 100 parts of nitrile rubber, 5 parts of zinc oxide, 1 part of stearic acid, 5 parts of antioxidant, 70 parts of high wear-resistant carbon black, 5 parts of liquid nitrile, 5 parts of dioctyl sebacate, 10 parts of special resin, 2 parts of vulcanizer, 3.5 parts of accelerator, 2 parts of dispersant, and 0.5 parts of scorch retarder.

[0012] Embodiment 1: A high temperature resistant and corrosion resistant rubber sealing ring, which is made of the following raw materials in parts by weight: 90 parts of nitrile rubber, 3 parts of zinc oxide, 0.5 parts of stearic acid, 3 parts of antioxidant, 60 parts of high wear-resistant carbon black, 4 parts of liquid nitrile, 4 parts of dioctyl sebacate, 8 parts of special resin, 1 part of vulcanizing agent, 2 parts of accelerator, 1 part of dispersant, and 0.3 parts of scorch retarder.

[0013] Example 2: A high temperature resistant and corrosion resistant rubber sealing ring, which is made of the following raw materials in parts by weight: 110 parts of nitrile rubber, 8 parts of zinc oxide, 2 parts of stearic acid, 8 parts of antioxidant, 80 parts of high wear-resistant carbon black, 6 parts of liquid nitrile, 6 parts of dioctyl sebacate, 12 parts of special resin, 4 parts of vulcanizing agent, 6 parts of accelerator, 4 parts of dispersant, and 0.7 parts of scorch retarder.

[0014] The rubber sealing ring manufactured in Example 1 was tested according to the testing standards, and its injection process performance is shown in Table 1.

[0015] Table 1:

[0016] The rubber sealing ring made in Example 1 was tested according to the testing standards, and its main physical and mechanical properties are shown in Table 2.

[0017] Table 2:

[0018] The rubber sealing ring made in Example 2 was tested according to the testing standards, and its injection process performance is shown in Table 3.

[0019] Table 3:

[0020] The rubber sealing rings made in Examples 1 and 2 were tested according to the testing standards, and their main physical and mechanical properties are shown in Table 4.

[0021] Table 4:

Claims

1. A concrete piston rubber formula for injection technology, characterized in that: The invention is composed of the following materials in parts by weight: 90-110 parts of nitrile rubber, 3-8 parts of zinc oxide, 0.5-2 parts of stearic acid, 3-8 parts of antioxidant, 60-80 parts of high wear-resistant carbon black, 4-6 parts of liquid nitrile, 4-6 parts of dioctyl sebacate, 8-12 parts of special resin, 1-4 parts of vulcanizing agent, 2-6 parts of accelerator, 1-4 parts of dispersant and 0.3-0.7 parts of scorch retarder.

2. A concrete piston rubber formula for injection technology according to claim 1, characterized in that: The invention is composed of the following materials in parts by weight: 100 parts of nitrile rubber, 5 parts of zinc oxide, 1 part of stearic acid, 5 parts of antioxidant, 70 parts of high wear-resistant carbon black, 5 parts of liquid nitrile, 5 parts of dioctyl sebacate, 10 parts of special resin, 2 parts of vulcanizing agent, 3.5 parts of accelerator, 2 parts of dispersant and 0.5 parts of scorch retarder.

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