Composition for manufacturing low-hardness rubber material

A technology of rubber materials and compositions, which is applied in the field of manufacturing low-hardness and high-damping rubber materials, can solve the problems of lack of elasticity and shape stability, high price, loss of practicability, etc., and achieve the effect of eliminating small high-frequency vibrations

Inactive Publication Date: 2008-06-25
SHANGHAI HUAXIANG RUBBER PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing rubber materials used for vibration reduction have a hardness between 40 and 60 Shore A, which cannot meet the requirements of using low-hardness rubber materials for vibration reduction required by the above-mentioned precision instruments (see "Practical Formulas for Rubber Products", Xie Zhonglin , edited by Yang Minfang, Chemical Industry Press, second edition in February 2004, P181)
The method of adding a large amount of oil softener in order to pursue low hardness will cause oil to spray out to the surface, form pollution, and cause the physical and mechanical properties of the rubber material to decrease and lose its practicability
In the past, in order to make low-hardness rubber materials, silicone rubber or special polyurethane was generally used as raw materials, but first, they are expensive, and second, most of these low-hardness materials are gel-like, lacking sufficient elasticity and shape stability Not suitable for vibration damping products (supports, pads, etc.)

Method used

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  • Composition for manufacturing low-hardness rubber material
  • Composition for manufacturing low-hardness rubber material
  • Composition for manufacturing low-hardness rubber material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 and comparative example 1～3

[0030] According to the formula listed in Table 1, 330 parts of naphthenic oil and 1.5 parts of vulcanizing agent dimorpholine disulfide are respectively added to masterbatch A and masterbatch B, and the two kinds of masterbatches are used in different proportions. The third monomers of EPDM rubber are 5-ethylidene-2-norbornene (ENB) and dicyclopentadiene (DCPD), the dosage is listed in Table 2, and the test was made by vulcanization at 160°C×30min Using standard test pieces, the test results obtained are shown in Table 2.

[0031] Table 2

[0032]

[0033]

Embodiment 2

[0034] Embodiment 2 and Comparative Examples 4-6

[0035] Embodiment 2 is to change 330 parts of naphthenic oils and 1.5 parts of vulcanizing agent dimorpholine disulfide in embodiment 1 into 310 parts of naphthenic oils and 2 parts of vulcanizing agent dimorpholine disulfides. Comparative example 4 is to change the vulcanizing agent dimorpholine disulfide in embodiment 1 into 1.5 parts of sulfur. In Comparative Example 5, the EPDM rubber in Example 1 was changed to a variety with a propylene content of 45% by mass. 310 parts of naphthenic oil and 1.5 parts of vulcanizing agent dimorpholine disulfide were added to the masterbatch A to make comparative example 6. The test results are shown in Table 3.

[0036] table 3

[0037]

[0038]

[0039] From the test results shown in Table 2 and Table 3, it can be seen that the composition of the present invention can be used to prepare low-hardness rubber materials with Shore A hardness ≤ 10 and excellent comprehensive physica...

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Abstract

An assemblage used for manufacturing the low-hardness rubber materials is characterized in that the ethylene propylene diene monomer and the polynorbornene rubber are both used in a mass ratio ranging from 25 to 35 / 75 to 65, with the cycloalkane oil as the softner and the DTDM as the curing agent. The third monomer of the ethylene propylene diene monomer is the ethylidene norbornene (ENB) and the suitable content of the propylene ranges from 20 per cent to 30 per cent in mass percentage.

Description

technical field [0001] The present invention relates to the rubber processing industry in the field of chemical industry, in particular to a compounding technology of a rubber composition, that is, to provide a composition for manufacturing low-hardness and high-damping rubber materials. Background technique [0002] With the rapid development of science and technology today, many equipment and instruments are equipped with high-sensitivity and high-precision instruments and meters, which are of great significance for controlling the correct operation of equipment and maintaining normal production. However, as the equipment runs faster and faster, vibration will inevitably occur. For this type of precision instrument, even a slight high-frequency vibration will cause deviations in the accuracy of the instrument and even affect its normal use. This can have adverse consequences for scientific experimental data and production process control. The most effective way to elimina...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L45/00C08K5/378C08J3/24
Inventor 张丰戴旭旺何誉娣汪碧澄林宏光
Owner SHANGHAI HUAXIANG RUBBER PROD
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