Rubber composition

A technology of rubber composition and styrene-butadiene rubber, which is applied to rubber insulators, organic insulators, conductors, etc., can solve the problems of unsatisfactory performance, low production efficiency, poor processing performance, etc. The effect of processability

Inactive Publication Date: 2009-06-24
JIANGSU HENGFENG CABLE
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  • Abstract
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AI Technical Summary

Problems solved by technology

The styrene-butadiene rubber-butadiene rubber mixed rubber composition has relatively good comprehensive properties, but its strength is low before vulcanization, and the shape is poor. Although the strength increases after vulcanization, the increase is limited, and the strength of the vulcanized rubber is only low. It is 12Mpa, and the elongation at break is 500%; secondly, its processing performance is poor, resulting in low production efficiency
Used for cable insulation and sheath, its performance is still not ideal, so there is still room for improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0014] Example: See Table 2, first mix styrene-butadiene rubber and butadiene rubber fully, then add SBS and mix evenly for example 3 minutes, add process oil white oil, anti-aging agent RD and mix evenly for example 2 minutes, add reinforcing agent After the white carbon black is kneaded uniformly, for example, for 5 minutes, an accelerator is added, mixed thoroughly and uniformly, and then discharged to obtain the rubber composition of the present invention. Vulcanized by common process, such as continuous vulcanization of steam pipeline at 150-160°C, and vulcanization in steam tank at 150-160°C.

[0015] Table 2 Example formula table and performance (unit: kg)

[0016] SBR 40 35 30 Oil-extended butadiene rubber 40 50 60 thermoplastic elastomer SBS 20 15 10 Vulcanization accelerator CZ 1 1 Vulcanization accelerator TMTD 2 2 Vulcanization accelerator DTDM 0.5 0.5 0.5 Reinforcing agent (white carbon black) 30 30 30...

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PUM

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Abstract

The invention relates to a modified styrene butadiene rubber-cis-polybutediene rubber composition. The composition is characterized by being made from 40-30 parts of styrene butadiene rubber, 40-60 parts of cis-polybutediene rubber, 20-10 parts of styrene-butadiene-styrene (SBS) block copolymer, 1-4 parts of a vulcanization accelerator and 20-30 parts of a strengthening agent. The rubber composition has good physical and mechanical properties, high tensile strength up to 18MPa and high elongation at break up to 560% which increase by 50% and 12% respectively compared with those of the rubber composition without the SBS. In addition, the obtained rubber has good processing technique and high production efficiency, which enhances processability of a system, improves stiffness of products and lowers cost. The rubber composition has the three most important features of high strength, high elongation rate and good processability.

Description

technical field [0001] The invention relates to a thermoplastic elastomer rubber composition, especially an improvement to the existing styrene-butadiene rubber-butadiene rubber composition, and is especially used for wire and cable insulation and sheathing. Background technique [0002] Styrene-butadiene pure rubber is an unsaturated hydrocarbon polymer with low strength, high heat generation, low elasticity, poor cold resistance, and poor processing performance; butadiene rubber is the most elastic rubber with low temperature performance. Good, excellent wear resistance, so people mix and modify it to improve and improve its performance. The styrene-butadiene rubber-butadiene rubber mixed rubber composition has relatively good comprehensive properties, but its strength is low before vulcanization, and the shape is poor. Although the strength increases after vulcanization, the increase is limited, and the strength of the vulcanized rubber is only low. It is 12Mpa, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/00C08L9/06C08L53/02H01B3/28H01B7/17
Inventor 邰锡峰姚建强张建康蒋周山蒋辉张竹军
Owner JIANGSU HENGFENG CABLE
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