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Force-responding polymer foam composite

A composite material and polymer technology, applied in the field of force-responsive polymer foam composite materials, can solve the problems of single structure and performance, and achieve the effect of excellent comprehensive performance and low density

Pending Publication Date: 2020-05-19
厦门天策材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the advancement of material science and technology, these traditional thermosetting and thermoplastic foam materials have a single structure and performance, which can no longer meet the needs of the rapidly developing high-tech field, and they also need to develop in the direction of multi-function and intelligence.

Method used

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  • Force-responding polymer foam composite
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Examples

Experimental program
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Effect test

preparation example Construction

[2278] In the preparation process of polymer foam particles, other optional additives are preferably antioxidants, light stabilizers, heat stabilizers, crosslinking agents, chain extenders, compatibilizers, tougheners, plasticizers, Fuel.

[2279] In the present invention, the optional fillers in the polymer mainly play the following roles: ①Reduce the shrinkage rate of the molded product, improve the dimensional stability, surface finish, smoothness and flatness or dullness of the product ②Adjust the viscosity of the polymer; ③Meet different performance requirements, such as improving the impact strength and compressive strength, hardness, stiffness and modulus of polymer materials, improving wear resistance, increasing heat distortion temperature, improving electrical conductivity and thermal conductivity Etc.; ④ Improve the coloring effect of the pigment; ⑤ Give light stability and chemical corrosion resistance;

[2280] The optional fillers include, but are not limited to...

Embodiment 1

[2328]

[2329] The thermoplastic polyurethane particle (685A, Germany BASF) of 100 weight parts, the water of 400 weight parts, the tricalcium phosphate of 7 weight parts join in the autoclave, inject the supercritical carbon dioxide of 40 weight parts under the state of stirring, then Raise the temperature of the autoclave to 116°C, keep the pressure in the autoclave at 20 bar, then maintain the temperature and pressure for 2 hours, and finally open the discharge valve at the bottom of the autoclave, take out the foam particles, wash and air dry.

[2330] Take 8g of hexamethylene diisocyanate and add it to a three-necked flask, vacuum dehydrate it at 120°C for 2 hours, add 12ml of DMF to dissolve and dilute after cooling down to 45°C, protect it with argon, then mix 3.5g of the force-sensitive compound (a) and A small amount of butyl tin ethyl dilaurate solution was dissolved in 40 mL DMF and added dropwise to the reaction flask at a constant speed. After heating to 70 ° C...

Embodiment 2

[2333]

[2334] Using equimolar amounts of 2-aminoethylaminoboronic acid and dopamine as raw materials and tetrahydrofuran as a solvent, carry out condensation reaction at 50°C and pH=8 to obtain amino compound (b). An isocyanate compound containing tetrathiafulvalene is prepared by reacting equimolar amounts of triphenylmethane triisocyanate with 4-hydroxymethyl-tetrathiafulvalene.

[2335] Weigh 30g of polyetheramine 2,000 and 2.5g of amino compound (b) in a dry and clean flask, heat to 100°C to remove water and oxygen with nitrogen gas for 1h, then add 17g of tetrathiafulvalene-containing isocyanate compound, at 80 ℃ under the condition of nitrogen protection for 2 hours to prepare the modified polyurea, which was cut into uniform granules. Then take the polyurea particle of 100 weight parts, the water of 400 weight parts, the tricalcium phosphate of 7 weight parts join in the autoclave, inject the supercritical carbon dioxide of 40 weight parts under the state of stirri...

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Abstract

The invention discloses a force-responding polymer foam composite material, which is characterized by comprising polymer foam particles with skins and a force-responding polymer, wherein a polymer chain of the force-responding polymer contains at least one force-sensitive group, and / or at least one force-responding component is blended in the polymer; under the action of mechanical force, a force-sensitive group and / or a force response component in the force response polymer are / is subjected to chemical and / or physical change to realize force response, wherein the polymer foam particle with the skin is prepared from an expandable polymer (composition) or an expandable polymer precursor (composition) through direct foaming and / or 3D printing, and has a skin structure; the coated polymer foam particles are compounded with the force-responding polymer and other optional components to form the composite material. The composite material has the characteristics of low density, lightness, heat insulation, sound insulation, buffering, shock absorption and force response, and can be widely applied to manufacturing of packaging materials, building materials, impact-resistant protective materials, shock absorption materials, buffering materials, sound attenuation materials, heat preservation materials, shape memory materials, electronic and electrical appliance materials, medical suppliesand the like.

Description

technical field [0001] The invention relates to the field of intelligent materials, in particular to a force-responsive polymer foam composite material. Background technique [0002] With the development of society, the demand for lightweight, insulating, shock-resistant and sound-absorbing materials in the consumer market has gradually increased, and the output and types of foam materials have increased sharply, making it a very important type of polymer products. Compared with the unfoamed material, the inside of the foam material is composed of a large number of cells with stable size and structure, which makes it have the advantages of light weight, heat insulation, sound insulation, high specific strength, cushioning and shock absorption, and wear resistance. Therefore, in packaging Industry, industry, agriculture, transportation, military industry, aerospace industry and daily necessities are widely used. [0003] Traditional foam varieties include polyurethane foam, ...

Claims

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Application Information

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IPC IPC(8): C08J9/12C08J9/32C08J9/10C08G83/00C08J3/24C08L75/04
CPCC08J9/122C08J9/32C08J9/103C08G83/008C08J3/246C08J2375/04C08J2203/06C08J2203/08C08J2203/22C08J2203/04
Inventor 不公告发明人
Owner 厦门天策材料科技有限公司
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