Foamable PET resin, preparation method and uses thereof

A resin and monomer technology, applied in the field of polyester foam materials, can solve the problems of low molecular weight, unsuitable for foaming, and poor melt strength of PET polyester, and achieve wide molecular weight distribution, short polycondensation time, and low equipment requirements. Effect

Active Publication Date: 2016-01-27
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the low molecular weight and poor melt strength of the existing physical recovery PET polyester, which is difficult to normally foam in the reaction extrusion and the simple toughening agent chemically modified PET molecular structure is not suitable for foaming Defects, provide a kind of foamable PET resin and its preparation method and use

Method used

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  • Foamable PET resin, preparation method and uses thereof
  • Foamable PET resin, preparation method and uses thereof
  • Foamable PET resin, preparation method and uses thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of preparation method of foamable PET resin, it comprises the steps:

[0039] 1. Dry the discarded PET bottle flakes in a blast oven at 100°C for 13 hours, and then transfer them to a vacuum oven at 135°C for 14 hours in vacuum to obtain physically recycled PET bottle flakes;

[0040] 2. Weigh 4kg physically recycled PET bottle flakes, 12gTGIC, 4gPMDA, 4g antioxidant 1010, 4gTPP, mix them evenly and put them into the twin-screw extruder to extrude and granulate; control the temperature of each section of the twin-screw extruder in: Zone 1 260°C, 260°C in the second zone, 265°C in the third zone, 265°C in the fourth zone, 260°C in the fifth zone, and 260°C in the sixth zone; the rotation frequency of the feeder of the twin-screw extruder is 15hz, and the rotation frequency of the host is 13.5hz;

[0041] 3. After drying the extruded pellets in a blast oven and a vacuum oven at 120°C for 12h, take them out for solid-state polycondensation, wherein the reaction temp...

Embodiment 2

[0043] A kind of preparation method of foamable PET resin, it comprises the steps:

[0044] 1. Dry the discarded PET bottle flakes in a blast oven at 110°C for 12 hours, and then transfer them to a vacuum oven for 12 hours at 140°C to obtain physically recycled PET bottle flakes;

[0045] 2. Weigh 2kg physically recycled PET bottle flakes, 8gTGIC, 2gPMDA, 2g antioxidant 1010, 2gTPP, mix them evenly and put them into the twin-screw extruder to extrude and granulate; control the temperature of each section of the twin-screw extruder in: Zone 1 255°C, 255°C in the second zone, 255°C in the third zone, 265°C in the fourth zone, 265°C in the fifth zone, and 265°C in the sixth zone; the rotation frequency of the feeder of the twin-screw extruder is 15hz, and the rotation frequency of the host is 13.5hz;

[0046] 3. After drying the extruded pellets in a blast oven and a vacuum oven at 100°C for 15 hours, take them out for solid-state polycondensation, wherein the reaction temperatur...

Embodiment 3

[0048] A kind of preparation method of foamable PET resin, it comprises the steps:

[0049] 1. Dry the discarded PET bottle flakes in a blast oven at 110°C for 12 hours, and then transfer them to a vacuum oven for 12 hours at 140°C to obtain physically recycled PET bottle flakes;

[0050] 2. Weigh 2kg physically recovered PET bottle flakes, 6gTGIC, 1gADR4730, 2g antioxidant 168, 3gTEPA, mix them evenly and put them into the twin-screw extruder for extrusion and granulation; control the temperature of each section of the twin-screw extruder in: Zone 1 260°C, 265°C in the second zone, 270°C in the third zone, 265°C in the fourth zone, 260°C in the fifth zone, and 260°C in the sixth zone; the rotation frequency of the feeder of the twin-screw extruder is 15hz, and the rotation frequency of the host is 13.5hz;

[0051] 3. After drying the extruded pellets in a blast oven and a vacuum oven at 110°C for 12 hours, take them out for solid-state polycondensation. The reaction temperatu...

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Abstract

The present invention discloses a foamable PET resin, a preparation method and uses thereof. The preparation method comprises: (1) uniformly mixing raw material components, wherein the raw material components comprise 985-995 parts of physically recycled PET bottle flakes, 1-9 parts of a chain extender, 1-3 parts of an antioxidant, and 1-3 parts of a thermal stabilizer, and a three-functional-group chain extension monomer and a multi-functional-group chain extension monomer having a functional group number of 4-6 are compounded according to a mass ratio of 1:3-5:1 to prepare the chain extender; (2) carrying out melt extrusion granulation; and (3) carrying out solid phase condensation polymerization on the obtained material for 1-5 h at a temperature of 210-230 DEG C under a vacuum degree of 5-100 Pa so as to obtain the foamable PET resin. According to the present invention, the foamed PET resin has characteristics of high molecular weight, wide molecular weight distribution, high melt strength, physically recycled PET degrading use changing, low raw material cost, and simple preparation process; and with the combination of the chain extender, the reaction extrusion and the solid phase condensation polymerization are combined, such that the reaction period is shortened, and the industrial production is easily achieved.

Description

technical field [0001] The invention relates to a polyester foam material, in particular to a foamable PET resin and its preparation method and application. Background technique [0002] Polyethylene terephthalate (PET) is the thermoplastic polyester with the largest output and the cheapest price. It has excellent physical, chemical and mechanical properties and is widely used in synthetic fibers, biaxially stretched films and polyesters. In recent years, it has also shown broad application prospects in the field of foam materials. PET polyester foam has the advantages of light weight, high specific strength, high rigidity, good electrical insulation and heat and sound insulation. It can be used in food packaging, building materials, wire insulation, microwave containers, refrigerator inner panels, sports equipment, Automotive, aerospace and other fields. At present, the total output of PET polyester in my country is about 10-30 million tons per year. Since PET polyester ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K5/1539C08K5/3492C08K5/526C08K5/134C08K5/5399B29C47/92C08G81/00B29C48/92
Inventor 刘涛袁海涛赵玲
Owner EAST CHINA UNIV OF SCI & TECH
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