Temperature-resistant natural rubber composition for shock absorbers

Abstract

The invention relates to a temperature-resistant natural rubber composition used for shock absorbers, which is composed of the following raw materials in parts by weight: 100 parts of natural rubber; 0.8 to 2 parts of dihydroquinoline antioxidants; 0.8 parts of imidazole antioxidants ~2 parts; white carbon black 15~25 parts; carbon black 15~25 parts; vulcanizing agent 1.5~1.9 parts; naphthenic paraffin oil 30~45 parts; zinc oxide and / or magnesium oxide 5~6 parts; 2.8 to 3.5 parts of acid or zinc stearate; 3 to 4 parts of accelerator; 2 to 2.8 parts of dispersant; 50 to 65 parts of filler; The sum of the numbers is less than or equal to 3.5 parts. The present invention selects a formula system in which anti-aging agent RD / MB is used together, and the two types of anti-aging agents interact with each other, and experiments show that the best effect can be achieved. The temperature-resistant natural rubber composition used for the shock absorbing part of the invention can fully maintain the elasticity of the natural rubber, overcome the defect that the natural rubber cannot withstand long-term operation at 120°C, and has high temperature resistance, high elasticity and long service life.

Description

technical field [0001] The invention relates to a temperature-resistant natural rubber composition used for a shock absorber, and belongs to the technical field of rubber compositions. Background technique [0002] An outboard motor means that the engine is outside the hull, or directly immersed in water, or above the water surface. At present, outboard motors are mostly used in small-sized hulls such as yachts, such as fishing boats and rubber boats on rivers, and are often found in rivers and lakes where fisheries are intensive. [0003] The outboard engine has the characteristics of high-frequency vibration and high heat generation, so the shock absorber rubber sleeve on the outboard engine needs to have the characteristics of high elasticity and high temperature resistance. However, the shock absorber rubber sleeve on the outboard engine currently uses The rubber used is mostly ordinary shock-absorbing rubber products, and its elasticity and high temperature resistance ...

AI Technical Summary

Problems solved by technology

[0003] The outboard engine has the characteristics of high frequency vibration and high heat generation, so the shock absorber rubber sleeve on the outboard engine needs to have the characteristics of high elasticity and high temperature resistance. However, the shock absorber rubber sleeve on the outboard engine currently uses Most of the rubber used is ordinary shock-absorbing rubber products, and its elasticity and high temperature resistance cannot meet the requirements, resulting in the aging of rubber ring sleeves, short service life, and poor quality and reliability.

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