Preparation method of polyurethane elastomer for steel rail energy consumption piece, polyurethane elastomer and energy consumption part

A technology of polyurethane elastomer and polyurethane prepolymer is used in energy-consuming parts, the preparation of polyurethane elastomers, and the fields of polyurethane elastomers to achieve the advantages of improving vibration and noise reduction performance, good energy storage and energy consumption performance, and improving production efficiency. Effect

Pending Publication Date: 2021-12-24
BEIJING JIUZHOUYIGUI SHOCK & VIBRATION ISOLATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Elastomer Elastomer

Method used

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  • Preparation method of polyurethane elastomer for steel rail energy consumption piece, polyurethane elastomer and energy consumption part
  • Preparation method of polyurethane elastomer for steel rail energy consumption piece, polyurethane elastomer and energy consumption part
  • Preparation method of polyurethane elastomer for steel rail energy consumption piece, polyurethane elastomer and energy consumption part

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Experimental program
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Effect test

Embodiment 1

[0032] The preparation of embodiment 1-polyurethane elastomer

[0033] 82 parts by weight of polyoxyethylene ether polyol (functionality 2-3, average molecular weight 1000-2000) are vacuum dehydrated at 100°C until the water content is less than 0.05%. Then lower the temperature to 35°C, stir and add 28 parts by weight of MDI-50. Raise the temperature to 80° C., react for 2 hours, take a sample to detect NCO%, and the NCO% is 12.0%. Post defoaming cooling afterward, obtains polyurethane prepolymer (component A);

[0034] 140 parts by weight of polyether polyol (functionality 2-3, average molecular weight is 1500), 0.3 parts by weight of catalyst dibutyltin dilaurate, 0.7 parts by weight of chain extender MOCA, 100 parts by weight of talcum powder (filler), 0.4 parts by weight Stir parts by weight of antioxidant 1010, 0.4 parts by weight of UV absorber 328 and 0.5 parts by weight of carbon black in a reactor, vacuum dehydrate at 100°C until the water content is <0.05%, and co...

Embodiment 2

[0036] The preparation of embodiment 2-polyurethane elastomer

[0037] 87 parts by weight of polyoxyethylene ether polyol (functionality 2-3, average molecular weight 1000-2000) were vacuum dehydrated at 110°C until the water content was less than 0.05%. Then lower the temperature to 40°C, stir and add 24 parts by weight of MDI-50. The temperature was raised to 80° C., and the reaction was carried out for 2.5 hours. The NCO% was detected by sampling, and the NCO% was 16.0%. Post defoaming cooling afterward, obtains polyurethane prepolymer (component A);

[0038] 150 parts by weight of polyether polyol (functionality 2-3, average molecular weight is 4000), 0.7 parts by weight of catalyst dibutyltin dilaurate, 0.9 parts by weight of chain extender MOCA, 110 parts by weight of talcum powder (filler), 0.7 parts by weight Stir parts by weight of antioxidant 1010, 0.8 parts by weight of UV absorber 328 and 0.7 parts by weight of carbon black in a reactor, vacuum dehydrate at 100°C...

Embodiment 3

[0040] The performance test of embodiment 3-polyurethane elastomer

[0041] According to the corresponding test standards, the test specimens were prepared by using a standard cutting knife (see attached figure 2 ), the hardness, density, tensile properties and loss factor (DMA thermal analysis method) of the material were tested according to the test standard. The test results are shown in Table 1.

[0042]

[0043] Experimental results show that the product of the present invention fully complies with the requirements of relevant standards; and shows significantly better performance than the prior art (generally 0.2-0.4) in terms of loss factor, so it has good energy storage and energy consumption performance, and then The vibration and noise reduction performance of the rail energy dissipation device can be improved.

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Abstract

The invention provides a preparation method of a polyurethane elastomer for a steel rail energy dissipation piece, the polyurethane elastomer and the energy dissipation piece. The method comprises the following steps: preparing a component A, namely, reacting 20-30 parts by weight of MDI-50 with 80-90 parts by weight of polyether polyol to form a polyurethane prepolymer; preparing a component B, namely, uniformly mixing 130-160 parts by weight of polyether polyol, 90-120 parts by weight of a first filler, 0.5-1.2 parts by weight of a chain extender and a proper amount of an additive, and then performing vacuum dehydration at 100-120 DEG C until the moisture is less than 0.05% to obtain the component B; and adding the component B into the component A which is heated to 40-50 DEG C, uniformly conducting stirring, and conducting vulcanizing at 20-60 DEG C for multiple days to obtain the polyurethane elastomer.

Description

technical field [0001] The invention relates to the technical field of vibration control, in particular to a method for preparing polyurethane elastomer used for rail energy-consuming parts, the polyurethane elastomer prepared by the method, and energy-consuming parts prepared from the polyurethane elastomer. Background technique [0002] With the vigorous development of my country's rail transit, people's work and travel are more convenient and faster, but the vibration and noise of rail transit not only affect the normal life of residents along the line, but may also cause fatigue damage to related rail equipment, directly shortening its service life. At present, there are many kinds of vibration and noise reduction measures for rail transit in China. Among them, rail dampers are more and more widely used because they can be installed on new or running lines conveniently and quickly, and have good vibration and noise reduction effects. . [0003] At present, there are man...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/10C08G18/66C08G18/48C08G18/32C08K3/34C08K3/04C08K5/134C08K5/3475E01B19/00
CPCC08G18/10C08G18/6685C08G18/4833C08G18/4804C08K3/34C08K3/04C08K5/1345C08K5/3475E01B19/00E01B19/003C08G18/48C08G18/3814
Inventor 丁德云李超孙方遵闫宇智郝晨星
Owner BEIJING JIUZHOUYIGUI SHOCK & VIBRATION ISOLATION
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