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Shock-resistant protective material based on thermoplastic elastomer and preparation method of shock-resistant protective material

A thermoplastic elastomer and protective material technology, applied in the field of organic materials, can solve problems such as non-reusability, poor protective ability of foam pads, and uncomfortable hard shells.

Active Publication Date: 2021-10-22
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, protective materials are mainly protected by hard shells or filled foam pads, but hard shells cause discomfort to the wearer (such as knee pads); and foam pads have poor protection against impact and cannot be reused

Method used

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  • Shock-resistant protective material based on thermoplastic elastomer and preparation method of shock-resistant protective material
  • Shock-resistant protective material based on thermoplastic elastomer and preparation method of shock-resistant protective material
  • Shock-resistant protective material based on thermoplastic elastomer and preparation method of shock-resistant protective material

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preparation example Construction

[0063] The present invention also provides a preparation method of the thermoplastic elastomer-based impact-resistant protective material described in the above technical solution, comprising:

[0064] The styrene-based thermoplastic elastomer A, the styrene-based thermoplastic elastomer B and polyborosiloxane are mixed, and then pressed and molded to obtain an impact-resistant protective material.

[0065] In the present invention, the above-mentioned preparation process preferably specifically includes the following steps:

[0066] a) mixing the styrene-based thermoplastic elastomer A and the styrene-based thermoplastic elastomer B to obtain a blend;

[0067] b) extruding and mixing the blend and polyborosiloxane through a twin-screw extruder to obtain an extrusion mixed material;

[0068] c) Pressing the extruded mixed material with a flat vulcanizing agent to obtain an impact-resistant protective material.

[0069] Wherein, the types and dosages of the styrene-based ther...

Embodiment 1

[0078] 1. Preparation of polyborosiloxane:

[0079] Using dihydroxy-terminated polydimethylsiloxane (Sigma Aldrich, viscosity 1800-2200 centistokes dihydroxy-terminated polydimethylsiloxane) with a number average molecular weight of 53000 g / mol, boric acid and dihydroxy-terminated polydimethylsiloxane The polydimethylsiloxane at the end was mixed according to the molar ratio of 0.8:1. After stirring and reacting at 120°C for 48 hours, the obtained crude product was filtered in tetrahydrofuran to remove unreacted boric acid (the ratio of tetrahydrofuran to crude product was 10 mL: 1g), and then evaporate the solvent to obtain polyborosiloxane.

[0080] The reciprocal of the crossover frequency of the storage modulus G' and the loss modulus G" of the above-mentioned polyborosiloxane was measured by linear frequency sweep, and the results showed that the relaxation time of the prepared polyborosiloxane was 0.1s.

[0081] 2. Preparation of impact-resistant protective materials: ...

Embodiment 2

[0090] 1. Preparation of polyborosiloxane:

[0091] Using dihydroxyl-terminated polydimethylsiloxane with a number average molecular weight of 7700 g / mol (Sigma Aldrich, dihydroxyl-terminated polydimethylsiloxane with a viscosity of 65 centistokes), boric acid and dihydroxyl-terminated polydimethylsiloxane Dimethylsiloxane was mixed according to the feeding molar ratio of 1.2:1. After stirring and reacting at 120°C for 48 hours, the obtained crude product was filtered in tetrahydrofuran to remove unreacted boric acid (the ratio of tetrahydrofuran to crude product was 10mL:1g) , and then evaporate the solvent to obtain polyborosiloxane.

[0092] The reciprocal of the crossover frequency of the storage modulus G' and the loss modulus G" of the above-mentioned polyborosiloxane was measured by linear frequency sweep, and the results showed that the relaxation time of the prepared polyborosiloxane was 1.5s.

[0093] 2. Preparation of impact-resistant protective materials:

[0094...

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Abstract

The invention provides a shock-resistant protective material based on a thermoplastic elastomer and a preparation method of the shock-resistant protective material. The shock-resistant protective material based on the thermoplastic elastomer provided by the invention is prepared from the following raw materials in percentage by mass: 20-60% of a styrene thermoplastic elastomer A, 25%-70% of a styrene thermoplastic elastomer B, and 10%-30% of polyborosiloxane, wherein the styrene thermoplastic elastomer A is a polystyrene-ethylene branched polyisoprene-polystyrene block polymer, the styrene thermoplastic elastomer B is selected from one or more of a polystyrene-hydrogenated polyisoprene-polystyrene block copolymer, a polystyrene-hydrogenated poly(isoprene / butadiene)-polystyrene block copolymer and a polystyrene-ethylene / butylene copolymer-polystyrene block copolymer. The shock-resistant protective material provided by the invention can effectively improve the shock-resistant protective performance and softness of the material.

Description

technical field [0001] The invention relates to the field of organic materials, in particular to a thermoplastic elastomer-based impact-resistant protective material and a preparation method thereof. Background technique [0002] Impact protective materials are protective materials that can absorb and disperse impact energy when impacted, thereby protecting people and objects from injury. In today's social life, impact-resistant protective materials have important uses in aerospace equipment, military protective equipment, sports protective gear, and electronic equipment protective cases. [0003] At present, protective materials mainly use hard shells or filled foam pads to achieve protection, but hard shells cause discomfort to the wearer (such as knee pads); foam pads have poor protection against impact and cannot be reused. Therefore, in order to achieve better protective performance and wearing comfort, researchers put forward requirements for safer, more comfortable a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/02C08L83/08C08G77/398
CPCC08L53/02C08L53/025C08G77/398C08L2207/04C08L83/08
Inventor 许东华赵志刚栾世方杨雪刘芳张丹
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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