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Thermoplastic polyurethane foaming particles, preparation method and application of thermoplastic polyurethane foaming particles in low-temperature-bending-resistant sole material

A technology of thermoplastic polyurethane and expanded particles, which is applied in the field of polyurethane elastomers, can solve the problems of easy wrinkles, easy bottom breakage, hardening, etc., and achieve the effect of excellent mechanical properties and excellent low-temperature bending resistance

Active Publication Date: 2022-01-28
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] CN109867946A uses the composition of two polymers to foam, and uses the environment-friendly supercritical carbon dioxide foaming method to foam to obtain well-formed polyurethane foam particles, but the foam will harden and easily wrinkled, cracked
[0006] CN 112109268 A discloses a foaming method, but the sole made of foamed beads obtained by the foaming process has a low service life in the north and is easy to break

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Preparation of hyperbranched polyimide:

[0063] 1) Add 100mol propylenediamine, 100mol3,3',4,4'-diphenyl ether tetracarboxylic dianhydride, and 2mol1,3,5-tris(4-aminophenoxy)benzene to 380kg of cresol and mix, Under the protection of nitrogen, pre-react at 30° C. for 8 hours to obtain a polyamic acid precursor solution;

[0064] 2) Add catalyst 2mol triethylamine to the polyamic acid precursor solution, stir the solution at 100° C. for 5 hours, and use an extruder to extrude and granulate after removing the solvent by distillation under reduced pressure to obtain a hyperbranched polyimide. The test molecular weight is about 15000 (D).

[0065] Preparation of thermoplastic polyurethane foam particles:

[0066] 1) Mix 1000g of thermoplastic polyether polyurethane WHT-8185RV, 20g of hyperbranched polyimide, and 10g of γ-cyclodextrin evenly, and granulate with an extruder at 200°C to obtain thermoplastic polyurethane blended gold particles;

[0067] 2) Add the thermopla...

Embodiment 2

[0071] Preparation of hyperbranched polyimide:

[0072] 1) Add 100mol of hexamethylenediamine, 100mol of bisphenol A diether dianhydride, and 0.5mol of 1,3,5-tris(4-aminophenoxy)benzene to 128kg of N-methylpyrrolidone and mix them under the protection of nitrogen. Pre-react at 5°C for 12 hours to obtain a polyamic acid precursor solution;

[0073] 2) Add catalyst 3mol acetic anhydride to the polyamic acid precursor solution, stir the solution at 150°C for 1 hour, and use an extruder to extrude and granulate after vacuum distillation to remove the solvent to obtain hyperbranched polyimide, molecular weight About 20000 (D).

[0074] Preparation of thermoplastic polyurethane foam particles:

[0075] 1) Mix 1000g of thermoplastic polyether polyurethane WHT-8185RV, 30g of hyperbranched polyimide, and 5g of 15-crown-5, and granulate them with an extruder at 205°C to obtain thermoplastic polyurethane blended gold particles;

[0076] 2) Add the thermoplastic polyurethane blended go...

Embodiment 3

[0080] Preparation of hyperbranched polyimide:

[0081] 1) Add 100mol decanediamine, 100mol 1,2,4,5-pyromellitic dianhydride, 0.4mol 5,10,15,20-tetrakis(4-aminophenyl) to 156kg dimethyl sulfoxide Porphyrins were mixed, and pre-reacted at 35°C for 2 hours under the protection of nitrogen to obtain a polyamic acid precursor solution;

[0082] 2) Add catalyst 0.3mol triethylamine to the polyamic acid precursor solution, stir the solution at 90°C for 4 hours, remove the solvent by distillation under reduced pressure, and extrude and granulate with an extruder to obtain hyperbranched polyimide , the molecular weight is about 28000 (D).

[0083] Preparation of thermoplastic polyurethane foam particles:

[0084] 1) Mix 1000g of thermoplastic polyether polyurethane WHT-8185RV, 50g of hyperbranched polyimide, and 5g of 15-crown-5, and granulate them with an extruder at 210°C to obtain thermoplastic polyurethane blended gold particles;

[0085] 2) Add the thermoplastic polyurethane b...

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Abstract

The invention belongs to the technical field of foaming materials, and provides thermoplastic polyurethane foaming particles, a preparation method and application of the thermoplastic polyurethane foaming particles in a low-temperature-bending-resistant sole material. The thermoplastic polyurethane foaming particles are prepared from the raw materials in parts by weight: 100 parts of a thermoplastic polyurethane elastomer, 0.2 to 5 parts of hyperbranched polyimide and 0.01 to 1 part of a supramolecular foaming improver containing a ring structure. The polyurethane foaming particles are subjected to supercritical carbon dioxide foaming molding, and the sole material prepared from the polyurethane foaming particles has excellent low-temperature bending resistance and has the characteristics of low density, high resilience and excellent mechanical properties.

Description

technical field [0001] The invention belongs to the field of polyurethane elastomers, and relates to a thermoplastic polyurethane foaming particle, a preparation method and its application in low-temperature bending-resistant shoe sole materials. [0002] technical background [0003] Foamed materials have low density, high specific strength, heat and sound insulation and cushioning properties, and are widely used in packaging, industry, agriculture, transportation, military, aerospace, and daily and civilian products. Commonly used foaming materials include polystyrene (PS) foam, polyethylene (PE) foam, polypropylene (PP) foam, and polyurethane (PU) soft and rigid foams. Or chemically fill a large number of air bubbles inside the plastic. [0004] Thermoplastic polyurethane (TPU) has the advantages of good physical and mechanical properties, low temperature flexibility, hydrolysis resistance, aging resistance, environmental friendliness, and recyclability. In addition to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/18C08J9/12C08J9/228C08L75/04C08L79/08C08K5/159C08G73/10A43B13/04A43B13/18
CPCC08J9/18C08J9/122C08J9/228C08J9/0023C08J9/0061C08G73/1007C08G73/1046A43B13/04A43B13/187C08J2375/04C08J2479/08C08J2405/16C08J2203/06C08J2203/08
Inventor 张金龙孙鹏举黄岐善
Owner WANHUA CHEM GRP CO LTD
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