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A kind of thermoplastic polyurethane expanded particle and preparation method thereof

A technology of thermoplastic polyurethane and expanded particles, applied in the field of foamed materials

Active Publication Date: 2021-01-29
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] One of the purposes of the present invention is to overcome the shortcomings of the existing TPU expanded particles and provide a TPU expanded particle with environmental protection, low shrinkage, good dimensional stability, plump appearance and excellent mechanical properties.

Method used

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  • A kind of thermoplastic polyurethane expanded particle and preparation method thereof
  • A kind of thermoplastic polyurethane expanded particle and preparation method thereof
  • A kind of thermoplastic polyurethane expanded particle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] (1) According to mass percentage, 90% of thermoplastic polyether polyurethane (8190RV) and 10% of polybutylene terephthalate (1200-211L) were mixed evenly. the mixed composition in the Melt blending is carried out in a co-rotating twin-screw extruder, and the blending temperature is 175-235°C. After underwater granulation and drying, TPU blended gold particles are obtained;

[0094] (2) Add the TPU blended gold particles into the autoclave, feed carbon dioxide to impregnate the TPU blended gold particles, the temperature of the autoclave is 40°C, the pressure is 15MPa, and the impregnation time is 2 hours;

[0095] (3) After impregnation, the temperature of the autoclave is lowered to 35° C., and the pressure of the autoclave is released to normal pressure to obtain non-foaming polyurethane blended alloy particles dissolved in carbon dioxide;

[0096] (4) The obtained non-foaming polyurethane blend alloy particles were rapidly placed in hot air at 130° C. to be heate...

Embodiment 2

[0098] (1) Mix 85% of thermoplastic polyether polyurethane (8190RV) and 15% of polybutylene terephthalate (1100-211MD) evenly according to mass percentage. the mixed composition in the Melt blending is carried out in a co-rotating twin-screw extruder, and the blending temperature is 175-235°C. After underwater granulation and drying, TPU blended gold particles are obtained;

[0099] (2) Add the TPU blended gold particles into the autoclave, feed carbon dioxide to impregnate the TPU blended gold particles, the temperature of the autoclave is 160 ° C, the pressure is 10 MPa, and the impregnation time is 1 hour;

[0100] (3) After being impregnated, the materials in the autoclave are discharged into the atmosphere at a pressure release rate of 5 MPa / s to obtain expanded particles.

Embodiment 3

[0102] (1) According to mass percentage, 88% thermoplastic polyether polyurethane (8190RV), 2% thermoplastic polyester elastomer ( 7246) and 10% compatibilizer HDPE-G-MAH mixed evenly. the mixed composition in the The melt blending is carried out in a co-rotating twin-screw extruder, and the blending temperature is 175-230°C. After underwater granulation and drying, TPU blended gold particles are obtained;

[0103] (2) Add the TPU blended gold particles into the autoclave, feed carbon dioxide to impregnate the TPU blended gold particles, the temperature of the autoclave is 30°C, the pressure is 10MPa, and the impregnation time is 1.5 hours;

[0104] (3) After being impregnated, release the autoclave pressure to normal pressure at 30° C. to obtain non-foaming polyurethane blended alloy particles dissolved in carbon dioxide;

[0105] (4) The obtained non-foaming polyurethane blended alloy particles were rapidly placed in hot air at 150° C. to be heated and foamed to obtain ...

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Abstract

The invention relates to a thermoplastic polyurethane foam particle and a preparation method thereof. The thermoplastic polyurethane foamed particles comprise the following components in mass percentage: (A) 65-90% thermoplastic polyurethane elastomer, (B) 2-30% thermoplastic resin polymer, (C) 0-15% phase Toner. Preparation method: Add thermoplastic polyurethane elastomer, thermoplastic resin polymer and compatibilizer blended gold particles into the autoclave, add carbon dioxide into the autoclave, make the carbon dioxide in the autoclave in a supercritical state, release the pressure of the autoclave to obtain dissolution Non-expandable particles with carbon dioxide; the non-expandable particles with carbon dioxide dissolved in hot air are heated and expanded to obtain expanded particles. The prepared thermoplastic polyurethane foamed particles have stable size, basically no shrinkage, bright and full surface, uniform cell diameter, controllable cell size of 10-100um, and good resilience performance.

Description

technical field [0001] The invention relates to thermoplastic polyurethane foam particles and a preparation method thereof, belonging to the field of foam materials. Background technique [0002] 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. [0003] 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 the excellent performance of the material, it also has excellent resilience and low densit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/08C08L75/06C08L67/02C08L67/00C08L51/06C08L77/02C08L77/06C08L23/06C08L23/14C08L25/06C08J9/12
CPCC08J9/122C08J2375/06C08J2375/08C08J2423/06C08J2423/14C08J2425/06C08J2451/04C08J2451/06C08J2467/00C08J2467/02C08J2477/02C08J2477/06C08L75/06C08L75/08C08L2203/14C08L2205/03C08L2207/062C08L67/02C08L67/00C08L51/06C08L77/02C08L77/06C08L51/04C08L23/06C08L23/14C08L25/06
Inventor 杨永柱付小亮黄岐善陈玉兵翟志斌李肇坚
Owner WANHUA CHEM GRP CO LTD
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