High-strength insulating rubber formula and preparation process thereof

Abstract

According to the high-strength insulating rubber formula and the preparation method thereof disclosed by the invention, the rubber prepared by the rubber formula and the preparation method is insulating and high in strength, and can meet the requirements of a low-temperature electrophoresis process. White carbon black and diatomite are taken as main materials, so that an insulation effect is achieved. According to a conventional rubber formula with white carbon black as a main body, due to the fact that the PH value of the white carbon black is slightly acidic, the vulcanization speed and the vulcanization degree of the rubber are affected, the dosage of the white carbon black needs to be considered, and the fluidity of the rubber and the strength of vulcanized rubber are difficult to consider at the same time. And by using the KH-2 white carbon black, the problems are avoided, and the rubber strength is greatly improved.

Description

Technical Field

[0001] The invention relates to automobile shock absorption, and in particular to a high-strength insulating rubber formula and a preparation process thereof. Background Art

[0002] In the automotive industry, the automotive top rubber shock absorber adopts low-temperature electrophoretic coating production process, which has high requirements for rubber materials: it must have insulation requirements and sufficient physical and mechanical properties. Traditional rubber materials cannot meet the requirements. Summary of the invention

[0003] The invention proposes a high-strength insulating rubber formula and a preparation process thereof, aiming to solve the above problems.

[0004] The technical solution of the present invention: A high-strength insulating rubber formula, the formula comprising the following raw materials: 80 parts of smoked sheet rubber, 20 parts of cis-butyl BR9000, 10 parts of N330 carbon black, 25 parts of KH-2 white carbon black, 35 parts of precipitated white carbon black, 3.5 parts of silane coupling agent, 15 parts of N85 diatomaceous earth, 6 parts of naphthenic oil, 5.5 parts of indirect zinc oxide, 2.5 parts of stearic acid, 3 parts of antioxidant, 2 parts of microcrystalline wax, 1.5 parts of sulfur, 2.5 parts of accelerator; The above raw materials are all measured by weight.

[0005] A method for preparing high-strength insulating rubber, the above formula is equipped with various raw materials; the method comprises the following steps: 1) Add tobacco sheet rubber and BR9000 to the internal mixer and pressurize for 1 min; add zinc oxide, stearic acid, antioxidant, microcrystalline wax and N330 carbon black and pressurize for 2 min; add KH-2 white carbon black, precipitated white carbon black and silane coupling agent and pressurize for 2 min; add cyclohexane oil and pressurize for 1 min; mix to 120°C and then raise the plug to vent once; mix to 140°C and then discharge rubber A; 2) Rubber A is put into the open mill and thinned twice, then the sheet is taken out and heat is dissipated to obtain a semi-finished product; 3) After the semi-finished product is parked for 12 hours, it is added to the internal mixer, sulfur and accelerator are added, and the internal mixer is pressurized for 30 seconds twice, and then the rubber B is discharged; 4) Rubber B is put into the open mill and thinned twice, then the sheet is taken out and heat is dissipated to obtain the finished product; The finished product is high-strength insulating rubber.

[0006] The rubber prepared by the above-mentioned rubber formula and preparation method has high insulation and strength and can meet the requirements of low-temperature electrophoresis process.

[0007] The insulation effect is achieved by using white carbon black and diatomaceous earth as the main materials.

[0008] Conventional rubber formulas with silica as the main component have an acidic pH value, which affects the vulcanization speed and degree of the rubber. Therefore, the amount of silica needs to be considered at this time, making it difficult to balance the fluidity of the rubber and the strength of the vulcanized rubber as a whole.

[0009] By using KH-2 white carbon black, the above problems are avoided and the rubber strength is greatly improved. DETAILED DESCRIPTION

[0010] Ingredients: 28kg smoked rubber, 7kg butadiene BR9000, 3.5kg N330 carbon black, 8.75kg KH-2 white carbon black, 12.25kg precipitated white carbon black, 1.225kg silane coupling agent, 5.25kg N85 diatomaceous earth, 2.1kg cyclohexane oil, 1.925kg indirect zinc oxide, 0.875kg stearic acid, 1.05kg antioxidant, 0.7kg microcrystalline wax, 0.525kg sulfur, 0.875kg accelerator.

[0011] X(S)N-75 internal mixer and XKJ-560 open mixer are used.

[0012] 1) Add tobacco sheet rubber and BR9000 to the internal mixer and pressurize for 1 min; add zinc oxide, stearic acid, antioxidant, microcrystalline wax and N330 carbon black and pressurize for 2 min; add KH-2 white carbon black, precipitated white carbon black and silane coupling agent and pressurize for 2 min; add cyclohexane oil and pressurize for 1 min; mix to 120°C and then raise the plug to vent once; mix to 140°C and then discharge rubber A; 2) Rubber A is put into the open mill and thinned twice, then the sheet is taken out and heat is dissipated to obtain a semi-finished product; 3) After the semi-finished product is parked for 12 hours, it is added to the internal mixer, sulfur and accelerator are added, and the internal mixer is pressurized for 30 seconds twice, and then the rubber B is discharged; 4) Rubber B is put into the open mill and thinned twice, then the sheet is taken out and heat is dissipated to obtain the finished product; When pressurizing in the above 1) and 3), the control pressure is 10Mpa; The finished product is high-strength insulating rubber.

[0013] Compare the performance of high-strength insulating rubber and ordinary top rubber:

[0014] Compared with ordinary top rubber, the strength of high-strength insulating rubber is improved to a certain extent and has excellent insulation performance.

[0015] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A high-strength insulating rubber formula, characterized in that: The formula includes the following raw materials: 80 parts of smoked sheet rubber, 20 parts of cis-butyl BR9000, 10 parts of N330 carbon black, 25 parts of KH-2 white carbon black, 35 parts of precipitated white carbon black, 3.5 parts of silane coupling agent, 15 parts of N85 diatomaceous earth, 6 parts of naphthenic oil, 5.5 parts of indirect zinc oxide, 2.5 parts of stearic acid, 3 parts of antioxidant, 2 parts of microcrystalline wax, 1.5 parts of sulfur, 2.5 parts of accelerator; The above raw materials are all measured by weight.

2. A method for preparing high-strength insulating rubber, characterized in that: According to claim 1, the formula is equipped with various raw materials; the method comprises the following steps: 1) Add tobacco sheet rubber and BR9000 to the internal mixer and pressurize for 1 min; add zinc oxide, stearic acid, antioxidant, microcrystalline wax and N330 carbon black and pressurize for 2 min; add KH-2 white carbon black, precipitated white carbon black and silane coupling agent and pressurize for 2 min; add cyclohexane oil and pressurize for 1 min; mix to 120°C and then raise the plug to vent once; mix to 140°C and then discharge rubber A; 2) Rubber A is put into the open mill and thinned twice, then the sheet is taken out and heat is dissipated to obtain a semi-finished product; 3) After the semi-finished product is parked for 12 hours, it is added to the internal mixer, sulfur and accelerator are added, and the internal mixer is pressurized for 30 seconds twice, and then the rubber B is discharged; 4) Rubber B is put into the open mill and thinned twice, then the sheet is taken out and heat is dissipated to obtain the finished product; The finished product is high-strength insulating rubber.

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