Chloroprene rubber composition having improved cold tolerance

A chloroprene rubber and composition technology, applied in the field of chloroprene rubber composition, can solve the problems of poor cold resistance, low temperature crystallization, etc., and achieve the effects of improving cold resistance and overcoming low temperature crystallization

Active Publication Date: 2009-01-28
CHINA ACADEMY OF RAILWAY SCI CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The object of the present invention is to aim at the defects of the above-mentioned prior art, to provide a neoprene compound suitable for the operating environment of railway locomotives and vehicles i...

Method used

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  • Chloroprene rubber composition having improved cold tolerance
  • Chloroprene rubber composition having improved cold tolerance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The cold-resistant chloroprene rubber of the present invention is prepared according to the formula described in Table 1 by the conventional method of producing rubber sealing products in the field. The production process steps are as follows:

[0032] Raw rubber mastication

[0033] ↓

[0034] Ingredients→mixing→parking→inspection→distribution (→fabric or metal skeleton coating)→vulcanization→trimming→finished product inspection→in storage.

[0035] Table 1 List of ingredients of the neoprene composition (unit: kg)

[0036]

[0037]

[0038] Table 2 List of manufacturers of raw materials used in the present invention

[0039] raw material name

[0040] DOS

Embodiment 2

[0042] According to the formula shown in Table 1, the cold-resistant neoprene rubber was prepared by the same method as described in Example 1.

Embodiment 3

[0044] According to the formula shown in Table 1, the cold-resistant neoprene rubber was prepared by the same method as described in Example 1.

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Abstract

The invention provides a neoprene composite which can improve the cold tolerance performance of a brake of railway locomotive and rolling stock, using neoprene with slow crystalline growth velocity as the main material matched with other added rubbers and accessory ingredients that can disturb the crystallization of neoprene, reduce the brittleness temperature and improve the cold tolerance performance thereof. Calculated by weight, the components comprise 100 to 50 portions of neoprene, 4 to 15 portions of vulcanizator, 0.5 to 4 portions of processing material, 10 to 90 portions of reinforcing filler, 15 to 50 portions of compound plasticizer, 0.5 to 6 portions of curing catalyst and 3 to 9 portions of aging inhibitor. The neoprene composite with improved cold tolerance performance overcomes the disadvantages of low temperature crystallization and poor cold tolerance of the common neoprene, is suitable for operation environment of railway locomotive and rolling stock in our country, and can meet use requirements within the temperature scope of minus 50 DEG C to 70 DEG C.

Description

Technical field [0001] The present invention relates to a rubber composition with improved cold resistance, in particular to a chloroprene rubber composition with improved cold resistance and used for railway locomotive brakes. Background technique [0002] With the development of my country's railway transportation, the performance of railway locomotive brakes has been continuously improved and improved, and the maintenance cycle of each component of the brake system needs to be gradually extended. [0003] Various brake valves in railway systems basically include the following types of rubber accessories: seals, gaskets, sandwich valves, diaphragms, among which diaphragms are the most technically difficult rubber accessories, and in various types of diaphragms Diaphragm of Zhongying 120 valve has the highest technical difficulty. The shape of the rubber diaphragm of various brakes is similar to a plate, the inner and outer edge sections are O-shaped, and they are installed on m...

Claims

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Application Information

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IPC IPC(8): C08L11/00C08K5/521C08L91/06C08L9/00C08L7/00C08L23/16C08K3/22C08K5/10C08K5/40C08K5/47
Inventor 郑华潘安徽陶强
Owner CHINA ACADEMY OF RAILWAY SCI CORP LTD
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