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Preparation method of polyborosiloxane modified rubber

A polyborosiloxane and modified rubber technology, which is applied in the field of polymer composite material preparation, can solve the unsolved problems of rubber material impact resistance and vibration damping performance, and achieve improved impact resistance and vibration damping performance, The effect of increased zero displacement resistance and increased equivalent damping ratio

Pending Publication Date: 2020-02-21
XI AN PEAK XUANKAI NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Seen from the above, the existing disclosed rubbers do not solve the impact resistance and vibration damping performance problems of rubber materials.

Method used

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  • Preparation method of polyborosiloxane modified rubber

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preparation example Construction

[0032] A preparation method of polyborosiloxane modified rubber, by adding polyborosiloxane to rubber to improve the impact resistance and vibration damping performance of rubber, comprising the following steps:

[0033] Step 1: Put rubber (AxB1-x) and polyborosiloxane (PBDMS) into the internal mixer according to the proportion in turn, and then add a certain amount of carbon black, white carbon black, and metal oxides to it for dehydration and banburying. The temperature is 140°C-160°C, and the time is 10min-30min, so that various materials are mixed evenly. During the mixing process, the non-covalent bonds of polyborosiloxane (PBDMS) can be reversibly broken and regenerated, absorbing a large amount of external energy, and at the same time causing molecular chain movement to increase and internal friction to increase, thereby improving the damping performance. The ratio range of rubber (AxB1-x) to polyborosiloxane (PBDMS) is 100:20-88, and the rubber material obtained after ...

Embodiment 1

[0042] Step 1 Add butadiene rubber, EPDM rubber, polyborosiloxane, white carbon black and metal oxides into the internal mixer in the ratio of 60:20:10:15:5 in sequence, and banbury at 140°C for 10 minutes .

[0043] Step 2 Die-cut the material obtained in Step 1 into sheets of 1000mm×1000mm×6mm.

[0044] Step 3: vulcanize the sheet obtained in step 2 at a pressure of 10 MPa and a temperature of 150° C. for 10 minutes to obtain a vulcanized modified rubber material.

[0045] Step 4 Cut the vulcanized modified rubber material obtained in Step 3 into 25mm×25mm×6mm sheets to obtain sample a.

Embodiment 2

[0047] Step 1 Add styrene-butadiene rubber, EPDM rubber, polyborosiloxane, white carbon black and metal oxides to the internal mixer in the ratio of 60:40:40:15:8 in sequence, and banbury at 150°C for 15 minutes .

[0048] Step 2 Die-cut the material obtained in Step 1 into sheets of 1000mm×1000mm×6mm.

[0049] Step 3: vulcanize the sheet obtained in step 2 at a pressure of 13 MPa and a temperature of 140° C. for 10 minutes to obtain a vulcanized modified rubber material.

[0050] Step 4 Cut the vulcanized modified rubber material obtained in Step 3 into 25mm×25mm×6mm sheets to obtain sample b.

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Abstract

According to the preparation method of the polyborosiloxane modified rubber disclosed by the invention, polyborosiloxane is added into rubber to prepare the modified rubber material, so that the shearrigidity and the equivalent damping ratio of the modified rubber material are greatly improved, the zero displacement resistance is also increased, and the impact resistance and the vibration reduction performance of the prepared rubber material are obviously improved.

Description

technical field [0001] The invention relates to the technical field of preparation methods of polymer composite materials, in particular to a preparation method of polyborosiloxane modified rubber. Background technique [0002] Rubber is a kind of high molecular polymer material with high elasticity of reversible deformation, that is, it can produce large deformation under a small external force, and can return to its original shape after the external force is removed. Rubber is a completely amorphous polymer with a low glass transition temperature and often a large molecular weight, greater than hundreds of thousands. [0003] The molecular chains of the rubber can be cross-linked. When the cross-linked rubber is deformed by an external force, it has the ability to recover quickly, and has good physical and mechanical properties and chemical stability. Rubber is the basic raw material of the rubber industry, widely used in the manufacture of tires, hoses, tapes, cables and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/00C08L9/06C08L9/02C08L23/22C08L7/00C08L23/16C08L83/14C08K7/26C08K3/22
CPCC08L9/00C08L9/02C08L9/06C08L23/22C08L2205/03C08L23/16C08L83/14C08K7/26C08K3/22C08L7/00
Inventor 李峰于钟梅于海洋
Owner XI AN PEAK XUANKAI NEW MATERIAL CO LTD
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