Temperature-resistant natural rubber composition for damping member

Abstract

The invention relates to a temperature-resistant natural rubber composition for a damping member. The composition is composed of the following raw materials, by weight, 100 parts of natural rubber, 0.8-2 parts of a dihydroquinoline anti-aging agent, 0.8-2 parts of an imidazole anti-aging agent, 15-25 parts of white carbon black, 15-25 parts of carbon black, 1.5-1.9 parts of a vulcanizing agent, 30-45 parts of naphthenic paraffin machine oil, 5-6 parts of zinc oxide and / or magnesium oxide, 2.8-3.5 parts of eleaostearic acid or zine stearate, 3-4 parts of a promoter, 2-2.8 parts of a dispersant and 50-65 parts of a filler. The sum of weight parts of the dihydroquinoline anti-aging agent and the imidazole anti-aging agent is less than or equal to 3.5 parts. A formula system with the combination of the anti-aging agents RD / MB is selected. With cooperation of the two types of anti-aging agents, experiments show that the optimum effect can be achieved. According to the temperature-resistant natural rubber composition for a damping member, elasticity of natural rubber can fully be maintained, and the defect that natural rubber cannot operate for a long time at 120 DEG C is overcome. The temperature-resistant natural rubber composition provided by the invention is temperature resistant, has high elasticity and has 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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