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Low-creep damping rubber and extrusion moulding method thereof

A vibration-damping rubber and low-creep technology, applied in the field of railway vibration-damping rubber

Active Publication Date: 2013-11-13
JIANGYIN HAIDA RUBBER & PLASTIC GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the above vibration-damping rubber materials have high mechanical and physical properties, they all have good flame retardancy and long-term creep resistance.

Method used

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  • Low-creep damping rubber and extrusion moulding method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The components and mass parts are: 90 parts of CR (Bayer 214), 10 parts of DPNR, 5 parts of zinc oxide, 4 parts of magnesium oxide, 1 part of stearic acid, 30 parts of carbon black N774, 5 parts of DOP, decabromobi 15 parts of phenyl ether (halogen-containing flame retardant), 5 parts of zinc borate (flame retardant synergist), 1.5 / 1.5 / 1 parts of antioxidant 4010NA / BLE / MB, 2 parts of microcrystalline paraffin, accelerator M / TMTD parts were 0.5 / 0.5, sulfur 0.5 parts.

[0031] The preparation process of Example 1 is as follows: first pass the neoprene rubber and the deproteinized natural rubber on the open rubber mixer with the minimum roll distance 10 times and 40 times respectively, then mix evenly, then add a 75L internal mixer, and then Add carbon black, anti-aging agent, vulcanization accelerator, vulcanization agent and cross-linking agent to the 75L internal mixer in sequence, control the roller temperature below 100°C, and control the rubber mixing time at about ...

Embodiment 2

[0034] The components and parts by mass are: 95 parts of CR (Bayer 214), 5 parts of DPNR, 4 parts of magnesium oxide, 1 part of stearic acid, 45 parts of carbon black N990, decabromodiphenylethane (halogenated flame retardant ) 10 parts, magnesium hydroxide (flame retardant synergist) 10 parts, DOS 5 parts, antioxidant RD / H / MB parts 1.5 / 1.5 / 1, microcrystalline paraffin 2 parts, accelerator M / TMTD parts The numbers are 0.5 / 0.5 respectively.

[0035] The preparation process of Example 2 is: first pass the chloroprene rubber 10 times with the minimum roll distance, then add a 75L internal mixer, and then add carbon black, plasticizer, anti-aging agent, crosslinking agent, etc. to the In the 75L internal mixer, the roller temperature is controlled below 100°C, and the rubber mixing time is controlled at about 30 minutes for discharging. After the rubber is parked for 24 hours, add it to the cold-feed extruder, control the temperature so that the head is 70°C, the body is 70°C, th...

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Abstract

The invention relates to a low-creep damping rubber and an extrusion moulding method thereof. The formula composition comprises following components: raw rubber matrix, carbon black, plasticizer, compound fire-retardant, vulcanizing agent and vulcanization accelerator. The extrusion moulding method comprises following steps: plasticating the raw rubber matrix with an open mill, cooling to the room temperature, adding carbon black, plasticizer, compound fire-retardant, cross-linking agent in sequence according to the ratio, evenly mixing, then putting the compound rubber in a single screw extruder, controlling the temperatures of machine head, machine body, mouthpiece and material feeding opening in the range of 50 and 80 DEG C, keeping the rotate speed of the screw in the range of 20 and 30 r / min, extruding the rubber material continuously, putting the rubber material in a vulcanizing tank, subjecting the rubber material to sulfide forming treatment at the temperature of 140 to 150 DEG C, and finally obtaining the product. The low-creep damping rubber not only has excellent physical mechanic performances, but also has a high creep resistance performance, is suitable for being used in the field of railway vibration reduction, and the comprehensive damping effect is over 30 dB.

Description

technical field [0001] The invention relates to a low-creep vibration-damping rubber and a preparation method thereof by extrusion molding, which is mainly used as a composite material for railway track ballast elastic cushions and belongs to the field of railway vibration-damping rubber. Background technique [0002] For some equipment or components that are externally connected or installed with rubber shock absorbers, such as vehicle engines, train bodies, ship main engines, bridges, subway tracks, etc., the creep characteristics of rubber shock absorbers are an important performance parameter. The magnitude of creep directly affects the dimensional stability and durability of rubber shock absorbers, and excessive creep will directly affect the operation safety of vehicles and ships. [0003] For the elastic shock-absorbing rubber products used in the subway, due to their long-term outdoor use, in addition to the high strength and excellent shock-absorbing performance of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L11/00C08L7/00C08K13/02C08K3/04C08K5/12C08K3/22C08K3/38B29C47/92B29C48/92
CPCB29C48/022
Inventor 李波吴传营贡健高蒙蒙尤连兴
Owner JIANGYIN HAIDA RUBBER & PLASTIC GROUP
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