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Ternary rubber composite with wide temperature range and high damping property and preparation method thereof

A rubber composition and high damping technology, which is applied in the wide temperature range high damping ternary rubber composition and its preparation field, can solve the problems of large amount of resin addition, difficult processing, poor mechanical properties, etc., and achieve improved processing and damping Performance, simple processing and molding methods, good physical and mechanical properties

Inactive Publication Date: 2011-11-02
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The prior art discloses some methods of widening the effective damping functional area of ​​butyl rubber, such as Huang Guangsu, etc. disclose a series of acrylate copolymers or homopolymers Wide temperature range damping material prepared with butyl rubber (patent number: 200510020174.5, 200510020175.X, 200610020403.8), the obtained material has excellent damping performance, but the acrylate copolymer or homopolymer used needs to be synthesized by itself, and the process is relatively complicated , solvents and monomers are difficult to completely remove and the cost is high; Zhang Dezhi et al. added synthetic resin as tackifier to chlorinated butyl rubber (Journal of Suzhou University (Engineering Science Edition), 2009, Volume 29, Issue 2, 57- 61), rubber materials with wide temperature range and high damping can be obtained, but the mechanical properties of the materials are not good, the tensile strength is basically below 10MPa, and the amount of resin added is large, the viscosity of the system is high, and the processing is extremely difficult, which is not conducive to industrial production
Generally speaking, butyl-based rubber is used in combination with other single rubbers. Since the Tg is not much different, this method cannot improve the high-temperature damping performance of butyl-based rubber or the low damping value of the trough area between the two peaks.
Our research group has studied the damping properties of chlorinated butyl rubber and nitrile rubber blends (as shown in Figure 1). The results show that the damping temperature range of chlorinated butyl rubber and nitrile rubber blends is very wide (- 75°C~65°C), but the effective damping value tanδ in the temperature range of -20°C~5°C is lower than 0.3

Method used

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  • Ternary rubber composite with wide temperature range and high damping property and preparation method thereof

Examples

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Embodiment 1

[0033] At 40°C, 100 g of butyl rubber, 10 g of nitrile rubber, and 10 g of neoprene rubber were put into an open mill, masticated for 20 minutes, and then blended; then 5 g of stearic acid, 7 g of zinc oxide, and 2 g of sulfur were added. , 4 g of dibenzothiazole disulfide (DM), and 5 g of carbon black with a model of N330, prepared into a mixed rubber, the mixed rubber was parked for 10 hours, and then vulcanized on a flat vulcanizer at a temperature of 100 ° C and a pressure of 18 MPa In 60 minutes, the desired ternary rubber composition can be prepared.

[0034] The properties of the prepared butyl rubber / nitrile rubber / chloroprene rubber composition are shown in Table 1.

Embodiment 2

[0036] At 80°C, 100 g of butyl rubber, 10 g of nitrile rubber, and 40 g of neoprene rubber were put into an open mill, masticated for 10 minutes, and then blended; then 2 g of stearic acid, 8 g of zinc oxide, and 3 g of sulfur were added. , 4 g of dibenzothiazole disulfide (DM), and 15 g of carbon blacks of N330 and N550 models, respectively, to prepare a mixed rubber. The mixed rubber was parked for 10 hours, and then at a temperature of 150 ° C and a pressure of 18 MPa, on a flat plate Vulcanize on a vulcanizer for 30 minutes.

[0037] The properties of the prepared butyl rubber / nitrile rubber / chloroprene rubber composition are shown in Table 1.

Embodiment 3

[0039] At 100°C, put 100 g of butyl rubber, 10 g of nitrile rubber, and 60 g of neoprene rubber into an open mill, masticate for 1 minute, and then blend; then add 2 g of stearic acid, 10 g of zinc oxide, and 5 g of sulfur , 0.5 g of phenolic resin (1055 resin), 5 g of dibenzothiazole disulfide (DM), and 40 g of carbon black with a model of N330 to prepare a mixed rubber. Under the pressure of 18MPa, vulcanize on a flat vulcanizer for 1 minute.

[0040] The properties of the prepared butyl rubber / nitrile rubber / chloroprene rubber composition are shown in Table 1.

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Abstract

The invention discloses a ternary rubber composite with a wide temperature range and high damping property and a preparation method thereof. The preparation method of the ternary rubber composite comprises the following steps of: firstly plasticating 100 parts by weight of butyl rubber, 10-40 parts of butyronitrile rubber and 160 parts of chloroprene rubber separately at 40-100 DEG C for 1-20 minutes and blending to obtain a blend; then, adding 2-32 parts by weight of vulcanizer, 7-17 parts by weight of vulcanization accelerating agent and 5-100 parts of filler the blend of the butyl rubber, the butyronitrile rubber and the chloroprene rubber to obtain a gross rubber; and finally standing the gross rubber for 8-24 hours, and vulcanizing at 100-200 DEG C and 5-20 MPa for 1-60 minutes to finally obtain the required ternary rubber composite. According to the invention, the preparation method is simple, the prepared vulcanized rubber has excellent damping property in a wider temperature range larger than 110 DEG C as well as excellent physical and mechanical properties; as a damping material, the ternary rubber composite can be widely used in damping and noise reduction aspects.

Description

technical field [0001] The invention relates to the field of ternary rubber compositions for rubber products, in particular to a ternary rubber composition with wide temperature range and high damping and a preparation method thereof. Background technique [0002] Various mechanical equipment will produce different degrees of vibration and noise during operation and work, which greatly affects people's normal production and living standards. Controlling vibration and reducing noise has become one of the problems that need to be solved urgently in today's society. As a kind of functional environmental protection material, damping material can absorb vibration mechanical energy and convert it into heat energy to dissipate it, thereby reducing the resonance amplitude of the system and achieving the purpose of shock and noise reduction. Polymer damping materials, especially rubber damping materials, have become the most researched and most widely used damping materials due to th...

Claims

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Application Information

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IPC IPC(8): C08L23/22C08L23/28C08L9/02C08L11/00C08L61/06C08K13/02C08K3/04C08K3/36C08K3/06C08K3/22C08K5/47
Inventor 卢珣田敏罗权焜
Owner SOUTH CHINA UNIV OF TECH
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