Waterproof polyborosiloxane impact-resistant damping material and preparation method thereof

The technology of polyborosiloxane and damping material is applied in the field of waterproof polyborosiloxane anti-shock damping material and its preparation, which can solve the problem that the anti-shock damping effect cannot be achieved, the damping performance is reduced, and the polyborosiloxane can be changed. alkane viscoelastic properties and other issues, to avoid hydrolysis problems, high anti-damping properties

Active Publication Date: 2019-12-13
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the results of the above literature, the hydrolytic stability of polyborosiloxane is not good. After being hydrolyzed with water, the viscoelastic properties of polyborosiloxane will be changed, and its damping performance will eventually be reduced.
However, unfortunately, the hydrolysis problem of polyborosiloxane has not received widespread attention, especially in the application of anti-impact damping materials.
The current published patent contains polyborosiloxane anti-shock damping material. If it encounters rain or washing, its damping performance will be significantly reduced, and it will not have the proper impact resistance damping effect, which may cause personal injury.

Method used

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  • Waterproof polyborosiloxane impact-resistant damping material and preparation method thereof
  • Waterproof polyborosiloxane impact-resistant damping material and preparation method thereof
  • Waterproof polyborosiloxane impact-resistant damping material and preparation method thereof

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preparation example Construction

[0052] The present invention also provides a preparation method of the waterproof polyborosiloxane impact damping material described in the above technical solution, comprising:

[0053] The polyborosiloxane-based material is mixed with the water-absorbing material to obtain a waterproof polyborosiloxane anti-shock damping material.

[0054] In the present invention, it is preferable to grind the water-absorbing material first, and then physically blend it with the polyborosiloxane-based material. In the present invention, there is no special limitation on the physical blending method, and the mixing can be carried out according to the mixing means well known to those skilled in the art, such as using an internal mixer for mixing. In the present invention, the mixing temperature is not particularly limited, room temperature is enough, specifically 20-40°C. After mixing, the water-absorbing material particles are uniformly dispersed on the surface and inside of the polyborosil...

Embodiment 1

[0058] Get 26.6mg boric acid and add three-neck bottle, according to stoichiometric ratio r=1 (the molar ratio of boric acid and the terminal hydroxyl group of hydroxyl-terminated polydimethylsiloxane), the hydroxyl-terminated polydimethylsiloxane (kinematic viscosity 100cst ) into a three-necked flask, stirred electromagnetically at room temperature for 2 h, and then heated in an oil bath at 120° C. for 48 h. Wherein, the reaction by-product water is removed by a vacuum distillation device. After the reaction, the polyborosiloxane polymer is obtained by cooling.

Embodiment 2

[0060] Get 3.8mg boric acid and add three-neck bottle, according to stoichiometric ratio r=1 (the molar ratio of boric acid and the terminal hydroxyl group of hydroxyl-terminated polydimethylsiloxane), the hydroxyl-terminated polydimethylsiloxane (kinematic viscosity 750cst , 3500cst, the molar ratio of the two viscosity substances is 1:1) into a three-neck flask, electromagnetically stirred at room temperature for 2h, and then heated in an oil bath at 120°C for 48h. Wherein, the reaction by-product water is removed by a vacuum distillation device. After the reaction, the polyborosiloxane polymer is obtained by cooling.

[0061] Get 90 parts of gained polyborosiloxane polymer and 10 parts of water-absorbing resin SAP1 of sodium polyacrylate class of German Evonik (Evonik) company, use internal mixer to mix uniformly, obtain waterproof polyborosiloxane anti-impact damping material .

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Abstract

The invention provides a waterproof polyborosiloxane impact-resistant damping material and a preparation method thereof. The waterproof polyborosiloxane impact-resistant damping material provided by the invention comprises the following components in parts by mass: 75-97 parts of a polyborosiloxane-based material and 3-25 parts of a water-absorbing material, wherein polyborosiloxane in the polyborosiloxane-based material is prepared from boric acid and polydimethylsiloxane through a condensation reaction; the polydimethylsiloxane is terminated by a hydroxyl group; the water-absorbing materialis one or more selected from the group consisting of organic polymer water-absorbent resin and an inorganic water-absorbing agent; and the inorganic water-absorbing agent is one or more selected fromthe group consisting of a molecular sieve and mineral soil. According to the invention, the specific polyborosiloxane-based material and the specific water-absorbing material are matched according toa certain ratio, so that the defect that the polyborosiloxane is easy to hydrolyze can be overcome, and the hydrolysis stability of the polyborosiloxane impact-resistant damping material is improved.

Description

technical field [0001] The invention relates to the field of polymer composite materials, in particular to a waterproof polyborosiloxane anti-shock damping material and a preparation method thereof. Background technique [0002] Impact damping material is a material that can absorb and dissipate impact energy when it is impacted, so as to play a protective role. Impact-resistant damping materials can protect people and objects when they are impacted. It has been widely used in military and police protective equipment, sports equipment, safety production protective equipment, and electronic product protection. [0003] A new generation of impact-damping materials uses impact-hardening polymers that respond to impact rates. Impact-hardening polymers are also often called shear-hardening polymers, shear-thickening gels, etc. Impact-hardening polymers are soft and elastic under normal conditions. Once they are subjected to rapid impact from the outside, they harden to form a p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/08C08L33/02C08L29/04C08L33/26C08K7/26C08G77/398
CPCC08G77/398C08K7/26C08L83/08C08L33/02C08L29/04C08L33/26
Inventor 许东华潘鸽刘芳石彤非李双双付志磊赵志刚杨雪
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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