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A kind of anti-impact protective material based on thermoplastic elastomer and preparation method thereof

A thermoplastic elastomer and protective material technology, applied in the field of organic materials, can solve the problems of poor protective ability of foam pads, inability to reuse, discomfort of hard shells, etc.

Active Publication Date: 2022-06-07
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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  • A kind of anti-impact protective material based on thermoplastic elastomer and preparation method thereof
  • A kind of anti-impact protective material based on thermoplastic elastomer and preparation method thereof
  • A kind of anti-impact protective material based on thermoplastic elastomer and preparation method thereof

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preparation example Construction

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

[0064] After mixing the styrene-based thermoplastic elastomer A, the styrene-based thermoplastic elastomer B and the polyborosiloxane, compression molding is performed 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 styrenic thermoplastic elastomer A and the styrenic thermoplastic elastomer B to obtain a blend;

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

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

[0069] The types and amounts of the styrene-based thermoplastic el...

Embodiment 1

[0078] 1. Preparation of polyborosiloxane:

[0079] Boronic acid and bishydroxyl-capped polydimethylsiloxane (Sigma Aldrich, bishydroxyl-terminated polydimethylsiloxane with a viscosity of 1800-2200 cSt) with a number average molecular weight of 53,000 g / mol were used to The terminal polydimethylsiloxane was mixed at a molar ratio of 0.8:1, and after stirring and reacting at 120 ° C for 48 h, the obtained crude product was filtered in tetrahydrofuran to remove unreacted boric acid (the consumption ratio of tetrahydrofuran and the crude product was 10 mL: 1 g), then evaporate the solvent to dryness to obtain polyborosiloxane.

[0080] Linear frequency sweep was used to test the reciprocal of the crossover frequency of the storage modulus G' and the loss modulus G" of the above-mentioned polyborosiloxane. The results showed that the relaxation time of the prepared polyborosiloxane was 0.1s.

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

[0082] raw material...

Embodiment 2

[0090] 1. Preparation of polyborosiloxane:

[0091] The boronic acid and dihydroxy terminated polydimethylsiloxane were combined with dihydroxy terminated polydimethylsiloxane with a number average molecular weight of 7700 g / mol (Sigma Aldrich, dihydroxy terminated polydimethylsiloxane with a viscosity of 65 cSt) The dimethylsiloxane was mixed according to the molar ratio of 1.2:1, and after stirring and reacting at 120 ° C for 48 h, the obtained crude product was filtered in tetrahydrofuran to remove unreacted boric acid (the consumption ratio of tetrahydrofuran and crude product was 10 mL: 1 g) , and then evaporate the solvent to obtain polyborosiloxane.

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

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

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Abstract

The invention provides a thermoplastic elastomer-based anti-impact protective material and a preparation method thereof. The impact-resistant protective material based on thermoplastic elastomer provided by the present invention is prepared from raw materials comprising the following components by mass ratio: styrene-based thermoplastic elastomer A, 20% to 60%; styrene-based thermoplastic elastomer B, 25% ~70%; polyborosiloxane, 10%~30%; wherein: the styrene-based thermoplastic elastomer A is polystyrene-ethylene branched polyisoprene-polystyrene block polymer; The styrenic thermoplastic elastomer B is selected from polystyrene-hydrogenated polyisoprene-polystyrene block polymer, polystyrene-hydrogenated poly(isoprene / butadiene)-polystyrene block polymer One or more of block copolymers, polystyrene-ethylene / butylene copolymers-polystyrene block copolymers. The anti-shock protection material provided by the invention can effectively improve the anti-shock protection performance and soft feeling of the material.

Description

technical field [0001] The invention relates to the field of organic materials, in particular to a thermoplastic elastomer-based impact protection material and a preparation method thereof. Background technique [0002] Impact protection materials are protective materials that absorb and disperse impact energy to protect people and objects from injury when they are impacted. 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 shells. [0003] At present, protective materials are mainly achieved by hard shells or filled foam pads, but the hard shells bring discomfort to the wearer (such as knee pads); while the foam pads have poor protection under impact and cannot be reused. Therefore, in order to achieve better protective performance and wearing comfort, researchers have put forward requirements for safer, more comfortable and lig...

Claims

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Application Information

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Patent Type & Authority Patents(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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