Biodegradable poly (butylene adipate terephthalate) micro-pore foaming particle with high foamability and preparation method thereof

A technology of terephthalic acid and polyadipic acid, applied in the direction of coating, etc., can solve the problems of not preparing high expansion ratio PBAT microcellular foaming materials, increasing production costs, overheating of foamed samples, etc., and achieves easy operation, The production cycle is short and the effect of promoting application

Active Publication Date: 2011-11-02
浙江博发新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to high production temperature and high energy consumption, it will lead to increased production costs
At the same time, it is also found that foaming at a high temperature close to the complete melting of the sample will easily lead to overheating of the foamed sample. If the foamed sample is not removed in time, problems such as cell structure collapse will occur.
It can be seen that the existing foaming process is not yet suitable for the basic requirements of industrial production development, and there is no technology for preparing high expansion ratio PBAT microcellular foaming materials.

Method used

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  • Biodegradable poly (butylene adipate terephthalate) micro-pore foaming particle with high foamability and preparation method thereof
  • Biodegradable poly (butylene adipate terephthalate) micro-pore foaming particle with high foamability and preparation method thereof
  • Biodegradable poly (butylene adipate terephthalate) micro-pore foaming particle with high foamability and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The particles of the unextended PBAT polymer and the particles of the extended PBAT polymer are placed in a high-pressure mold in a molding physical gas foaming device to ensure that the total volume of the particles does not exceed 1 / 30 of the mold volume, so that the particles have sufficient space for foaming. When the mold reaches the set temperature of 115°C, fill it with 16MPa CO 2 , kept at constant temperature and pressure for 15 minutes, and then released to normal pressure at a speed of 23MPa / s. The foamed particles were taken out and subjected to optical microscope analysis and density measurement, the results are shown in Table 1.

[0039] Table 1 Comparison of structure and properties of unextended and extended chain PBAT foamed particles

[0040]

Embodiment 2

[0042] The particles of the chain-extended PBAT polymer are placed in a high-pressure mold in a molding physical gas foaming device to ensure that the total volume of the particles does not exceed 1 / 30 of the mold volume, so that the particles have enough space for foaming. When the mold reaches the set temperature, fill it with 12MPa CO 2 , kept at constant temperature and pressure for 15 minutes, and then released to normal pressure at a speed of 17MPa / s. The foamed particles were taken out and subjected to optical microscope analysis and density measurement, the results are shown in Table 2.

[0043] Table 2 Comparison of structure and performance of PBAT expanded particles prepared by different foaming temperatures

[0044]

Embodiment 3

[0046] The particles of the chain-extended PBAT polymer are placed in a high-pressure mold in a molding physical gas foaming device to ensure that the total volume of the particles does not exceed 1 / 30 of the mold volume, so that the particles have enough space for foaming. When the mold reaches the set 115°C, fill in a certain pressure of CO 2 (The pressure is listed in Table 3 as the foaming pressure), held at a constant temperature for 15 minutes, and then released to normal pressure at a certain pressure relief speed (the pressure relief speed is listed in Table 3). The foamed particles were taken out and subjected to optical microscope analysis and density measurement, the results are shown in Table 3.

[0047] Table 3 Comparison of structure and performance of PBAT expanded particles prepared by different foaming pressures

[0048]

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PUM

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Abstract

The invention discloses a biodegradable poly (butylene adipate terephthalate) (PBAT) micro-pore foaming particle with high foamability and a preparation method thereof. The preparation method comprises the following steps: placing a chain extension PBAT particle with a melting point of Tm DEG C into a high-pressure mould of a mould-pressing physical gas foaming device; filling 8-20MPa CO2; keeping pressure for 5-20 minutes at a constant temperature within a range of Tm minus 30 DEG C to Tm plus 5 DEG C; releasing pressure at a speed of 5-30MPa / s; and sampling and cooling within 30 seconds, thereby acquiring the micro-pore foaming particle with high foamability. Compared with the raw material, the acquired micro-pore foaming particle with high foamability has the advantages that the volumeis increased by 10-30 times, the diameter of foaming pore is less than 100 microns, the foaming pore distribution is uniform, and the cortex structure does not exist. The preparation method provided by the invention has the advantages that the process flow is simple, the production period is short, the cost is low, the product property is excellent, and the preparation method is beneficial to industrial production, thereby being beneficial to the developing application of the biodegradable material in disposable catering and packaging industries.

Description

Technical field: [0001] The invention relates to biodegradable polyadipate-terephthalate-butylene glycol (PBAT) microporous foam particles with high expansion ratio and a preparation method thereof, belonging to the field of biodegradable polymer foam materials. Background technique: [0002] Polymer foam material is a kind of polymer / gas composite material with polymer as matrix. Since this material generally has the advantages of high specific strength, high impact strength, good heat insulation, and good electrical insulation, it is widely used in packaging, aircraft and auto parts, sports equipment, building materials, thermal insulation materials and in fields such as medicine. Existing types of foamed plastics mainly include polyurethane (EPU), polystyrene (EPS) and polyethylene (EPE), but they all have their limitations. EPU has monomer residues that are harmful to the human body and cannot be completely removed; EPS has already been banned by the United Nations in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12C08J9/14C08L67/02B29C41/52B29C47/92B29C44/60B29C48/92
CPCB29C48/04
Inventor 李文光王亚虞晨阳吴炳田
Owner 浙江博发新材料股份有限公司
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