Natural rubber chloroprene rubber composition for seawater-resistant rubber support as well as preparation method and application of natural rubber chloroprene rubber composition

A technology of rubber bearing and natural rubber, applied in the field of natural rubber neoprene composition, can solve the problems of poor low temperature performance, high cost of neoprene, poor processing performance, etc., to reduce swelling rate, improve aging resistance and Saltwater resistance, effects of improving aging resistance and low temperature resistance

Active Publication Date: 2022-05-31
SUZHOU HAIDER NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the natural rubber protective layer, the neoprene protective layer has better hot air aging performance and ozone aging resistance under the premise of maintaining the bond with the inner rubber, but the low temperature performance is poor, and the neoprene Rubber costs more and has poorer processability

Method used

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  • Natural rubber chloroprene rubber composition for seawater-resistant rubber support as well as preparation method and application of natural rubber chloroprene rubber composition
  • Natural rubber chloroprene rubber composition for seawater-resistant rubber support as well as preparation method and application of natural rubber chloroprene rubber composition
  • Natural rubber chloroprene rubber composition for seawater-resistant rubber support as well as preparation method and application of natural rubber chloroprene rubber composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This example provides a natural rubber neoprene composition for seawater-resistant rubber bearings, and its components are shown in Table 1.

[0035] Among them, the composition of 1# vulcanization system is: 1 part of sulfur, 5 parts of zinc oxide, 2 parts of magnesium oxide, 2 parts of accelerator DM; the composition of 2# vulcanization system is: 1 part of DCP, 5 parts of zinc oxide, 2 parts of magnesium oxide, accelerator Agent Na-22 2 parts.

[0036] The mixing process is as follows:

[0037] The rubber is mixed in an internal mixer in two stages. The initial temperature of the mixing chamber was 70°C, and the speed of the mixing rotor was 40r / min.

[0038] The one-stage mixing process is as follows: add chloroprene rubber and natural rubber raw rubber into the internal mixer at the same time, and after mixing for 2 minutes, add anti-aging agent, softener, acid absorber, and carbon black in sequence. Mixed for 5 minutes, the mixing temperature reached 110 degree...

Embodiment 2

[0041] This example provides a natural rubber neoprene composition for seawater-resistant rubber bearings, the preparation process of which is basically the same as in Example 1, the only difference being that the components of the composition are different, see Table 1 for details.

Embodiment 3

[0043] This example provides a natural rubber neoprene composition for seawater-resistant rubber bearings, the preparation process of which is basically the same as in Example 1, the only difference being that the components of the composition are different, see Table 1 for details.

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PUM

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Abstract

The invention relates to a natural rubber chloroprene rubber composition for a seawater-resistant rubber support as well as a preparation method and application of the natural rubber chloroprene rubber composition. The composition comprises the following components in parts by weight: 50-85 parts of natural rubber, 15-50 parts of chloroprene rubber, 5-15 parts of a vulcanization system and 2.5-7.5 parts of a compatilizer, the vulcanization system comprises a vulcanizing agent, an acid acceptor and a vulcanization accelerator, the vulcanizing agent is selected from one or a combination of sulfur and dicumyl peroxide, and the acid acceptor is selected from one or a combination of zinc oxide and magnesium oxide; the accelerant is selected from one or a combination of two of dibenzothiazyl disulfide and ethylene thiourea (2-thiol imidazoline); the compatilizer is chlorinated butyl rubber. The composition provided by the invention has excellent salt water resistance, thermal aging resistance and low temperature resistance.

Description

technical field [0001] The invention relates to a natural rubber neoprene composition for seawater-resistant rubber bearings, a preparation method and application thereof. Background technique [0002] In the field of traditional building isolation or the isolation rubber bearing in bridge engineering, natural rubber is mainly used. Usually, as long as the natural rubber material system is properly matched, it will have excellent mechanical properties and can meet the requirements of shock absorption design. However, with the development of marine resources in my country and the construction of a series of large-scale offshore projects, the isolation bearings of offshore facilities are faced with the combined effects of complex and harsh marine environments and earthquakes. As a result, the bearings located in the splash area and tidal area will not only be affected by ultraviolet rays, temperature, ozone, etc. in the air, causing rubber aging, but also may be slowly eroded ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L11/00C08L23/28C08K3/06C08K3/22C08K5/47C08K5/14
CPCC08L7/00C08K2003/2296C08K2003/222C08L2201/08C08L2205/08C08L11/00C08L23/283C08K3/06C08K3/22C08K5/47C08K5/14
Inventor 屈朋飞杨俊
Owner SUZHOU HAIDER NEW MATERIAL TECH CO LTD
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