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Polyurethane damping material and preparation method thereof

A shock-absorbing material, polyurethane technology, applied in the field of shock-absorbing materials, can solve the problems of limited use temperature range, unsuitable for high-temperature use, limited shock-absorbing performance, etc. Effect

Inactive Publication Date: 2017-05-31
深圳市思创新材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, when this material is used in human body protection or precision instrument protection, the main disadvantage is that the shock absorption performance is limited. When subjected to severe impacts, ordinary protective materials cannot completely dissipate the impact energy effectively. There will be a strong impact on the human body or equipment, which will cause personal injury or equipment damage
[0003] On the other hand, the commonly used rubber foam materials and polyurethane foam materials have a limited service temperature range and are not suitable for long-term high-temperature use.

Method used

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  • Polyurethane damping material and preparation method thereof

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Effect test

preparation example Construction

[0024] Such as figure 1 Shown, the preparation method of the polyurethane shock-absorbing material of one embodiment, comprises the following steps:

[0025] S10, kneading the polyurethane elastomer to obtain a kneaded polyurethane elastomer.

[0026] Wherein, in the step of kneading the polyurethane elastomer, the kneading temperature may be 180° C. to 210° C., and the kneading time may be 3 min to 10 min.

[0027] S20, uniformly mixing the shear thickening gel and the compatibilizer to obtain a uniformly mixed shear thickening gel and the compatibilizer.

[0028] Among them, the compatibilizer can be polydimethylsiloxane-polyethylene glycol, polyglycidyl ester, divinyl tetramethyl disiloxane, vinyl triethoxy siloxane, vinyl trichloro Silane, vinyltris(β-methoxyethoxy)silane, γ-glycidylpropyl-trimethoxysilane, γ-methacryloxypropyl-trimethoxysilane, N-(β-ammonia Ethyl)-γ-aminopropyl-methyl-trimethoxysilane, γ-chloropropyl-trimethoxysilane, γ-mercaptopropyl-trimethoxysilane,...

Embodiment 1

[0043] The polyurethane elastomer was kneaded, the kneading temperature was 190° C., and the kneading time was 5 min, to obtain the kneaded polyurethane elastomer.

[0044]Next, 100 parts of the shear thickening gel and 0.1 part of polydimethylsiloxane-polyethylene glycol were mixed on an open mixer, the mixing temperature was 100° C., and the mixing time was 2 minutes.

[0045] Add 20 parts of shear thickening gel and compatibilizer that have been mixed evenly to 100 parts of polyurethane elastomer that has been kneaded, and continue kneading. The kneading temperature is 190° C., and the kneading time is 6 minutes. After mixing evenly, add the vulcanizing agent DCP, and then mix for a period of time to produce tablets. After 24 hours, place the rubber on a flat vulcanizing agent for vulcanization at a temperature of 190°C and a pressure of 10 MPa for 7 minutes. That is, the final sample is obtained.

Embodiment 2

[0047] The polyurethane elastomer was kneaded, the kneading temperature was 200° C., and the kneading time was 3 minutes to obtain the kneaded polyurethane elastomer.

[0048] Next, 100 parts of the shear thickening gel and 0.5 part of divinyltetramethyldisiloxane were mixed on an open mixer, the mixing temperature was 80° C., and the mixing time was 5 minutes.

[0049] Add 20 parts of shear thickening gel and compatibilizer that have been mixed evenly to 100 parts of polyurethane elastomer that has been kneaded, and continue kneading. The kneading temperature is 180° C., and the kneading time is 8 min. Next, the uniformly mixed product is extruded and granulated on an extruder. Then the pellets were injection-molded on an injection molding machine, the nozzle temperature was 190°C, the injection pressure was 50MPa, the holding time was 60s, and the mold temperature was 50°C to obtain the final product.

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Abstract

The invention relates to a polyurethane damping material and a preparation method thereof. The preparation method for the polyurethane damping material comprises the following steps: uniformly mixing a shear thickening gel with a compatilizer, and then adding into a mixed polyurethane elastomer and mixing till being uniform, thereby obtaining the polyurethane damping material. According to the preparation method for the polyurethane damping material, the traditional method for forming the polyurethane elastomer is adopted; the process is simple; the cost is low; the performance is stable; and the process is simple and convenient. When the shear thickening gel is impacted, the polyurethane damping material automatically changes from soft state to hard state and can absorb energy, so that the protection function can be achieved; when the polyurethane elastomer as a structure matrix is impacted, a polyurethane skeleton structure has a support function and has a damping buffering function together with the padding; the use temperature scope is widened and the damping energy-absorbing capacity is promoted; the shear thickening gel can excellently disperse in the polyurethane matrix on the basis of the method of adding the compatilizer.

Description

technical field [0001] The invention relates to the field of shock-absorbing materials, in particular to a polyurethane shock-absorbing material and a preparation method thereof. Background technique [0002] The shock-absorbing and cushioning materials currently on the market mainly rely on materials with elastic deformation and compressibility as energy-absorbing materials. On the one hand, when this material is used in human body protection or precision instrument protection, the main disadvantage is that the shock absorption performance is limited. When subjected to severe impacts, ordinary protective materials cannot completely dissipate the impact energy effectively. There will be a strong impact on the human body or equipment, which will cause personal injury or equipment damage. [0003] On the other hand, currently commonly used rubber foam materials and polyurethane foam materials have a limited service temperature range and are not suitable for long-term high-tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L83/12C08K5/5425C08K5/5419B29C47/78B29C45/77
CPCB29C45/77B29C45/78B29C2945/76498B29C2945/76531B29C2945/76688B29C2945/76732C08K5/5419C08K5/5425C08L75/04C08L2201/08C08L83/12
Inventor 刘键林德苗闫路瑶
Owner 深圳市思创新材科技有限公司
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