Regenerated PET polyester, regenerated flame-retardant PET foam material and preparation method of regenerated flame-retardant PET foam material

A foaming material and polyester technology, which is applied in the field of engineering plastics to achieve the effects of improving flame retardancy, inhibiting thermal degradation and enhancing thermal stability.

Pending Publication Date: 2022-07-29
CHINA RESOURCES PACKAGING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are related patents on the recycling of PET polyester by physical methods to prepare foamed materials, and there are also related patents on the use of chemical methods to synthesize PET polyester to prepare foamed materials, but the use of chemical methods to recycle PET polyester and prepare it into foamed materials material is still vacant

Method used

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  • Regenerated PET polyester, regenerated flame-retardant PET foam material and preparation method of regenerated flame-retardant PET foam material
  • Regenerated PET polyester, regenerated flame-retardant PET foam material and preparation method of regenerated flame-retardant PET foam material
  • Regenerated PET polyester, regenerated flame-retardant PET foam material and preparation method of regenerated flame-retardant PET foam material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-10 and comparative example 1-4

[0033] The components and parts by weight of the embodiment of the present invention and the comparative example are selected as follows, taking the preparation of 10000g of recycled PET polyester as an example:

[0034] m 2 =166.1*(10000-m 1 ) / 192

[0035] m 3 =[62*(1000-m 1 ) / 192]*1.4

[0036] Taking the preparation of 10 kg of recycled PET polyester and adding 3500 g of recycled PET polyester as an example, the alkyd ratio is 1.4

[0037] m 2 =166.1*(10000-3500) / 192=5623.2g

[0038] m 3 =[62*(10000-3500) / 192]*1.4=2938.5g

[0039] Note: m 1 For recycled PET polyester quality; m 2 is the mass of terephthalic acid; m 3 is the mass of ethylene glycol; 166.1 is the unit molar mass of terephthalic acid; 62 is the unit molar mass of ethylene glycol; 192 is the molar mass of the PET monomer; k is the alkyd molar ratio (that is, ethylene glycol and terephthalic acid) Formic acid molar ratio)

Embodiment 1

[0041] (a) Selection of components and parts by weight

[0042] Recycled PET polyester: recycled PET polyester 3500g, terephthalic acid 5623.2g, ethylene glycol 2938.5g, catalyst 3.8g, stabilizer 3.6g, nucleating agent 210g, antioxidant 1.5g, branching agent is triphenyl Methane triisocyanate 2g and pyromellitic dianhydride 6g; wherein, the catalyst is ethylene glycol antimony, the stabilizer is trimethyl phosphite, the nucleating agent is titanium dioxide, and the antioxidant is antioxidant 1076;

[0043] Recycled flame retardant PET foam material: recycled PET polyester 9000g, flame retardants are triphenyl phosphate 500g and hexaphenoxy cyclotriphosphazene 600g;

[0044] (b) The preparation method of the regenerated flame retardant PET foam material is as follows: (1) The recycled PET polyester is added to the reaction kettle, terephthalic acid, ethylene glycol, catalyst, stabilizer, nucleating agent, antioxidant, support After mixing the agent evenly, it is prepared into ...

Embodiment 2

[0046] The only difference between Example 2 and Example 1 is that the proportioning selection of the branching agent is different. In Example 2, the branching agent is triphenylmethane triisocyanate 4g and pyromellitic dianhydride 4g, and the remaining components, The parts by weight and preparation method are exactly the same as in Example 1;

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PUM

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Abstract

The invention discloses regenerated PET polyester, a regenerated flame-retardant PET foam material and a preparation method thereof, and relates to the technical field of engineering plastics. The invention provides regenerated PET polyester. The regenerated PET polyester is prepared from the following components in parts by weight: 5 to 50 parts of recycled PET polyester, 40 to 85 parts of terephthalic acid, 30 to 45 parts of ethylene glycol, 0.01 to 0.1 part of a catalyst, 0.01 to 1 part of a stabilizer, 0.2 to 4 parts of a nucleating agent, 0.01 to 0.5 part of an antioxidant and 0.02 to 0.15 part of a branching agent, wherein the branching agent is selected from at least two of triphenylmethane triisocyanate, triphenyl isocyanate thiophosphate, tri (4-aminophenyl) amine, pyromellitic dianhydride, pentaerythritol, bisphenol A diglycidyl ether and triglycidyl isocyanurate. The invention also provides a regenerated flame-retardant PET foam material containing the regenerated PET polyester and a flame retardant, the prepared foam material not only has flame retardant property, but also can ensure the melt uniformity and various stable properties of the material, and the preparation process is safe, reliable, environment-friendly and pollution-free.

Description

technical field [0001] The invention relates to the technical field of engineering plastics, in particular to a recycled PET polyester, a recycled flame-retardant PET foam material and a preparation method thereof. Background technique [0002] There are chemical methods and physical methods for PET polyester recycling. The chemical method mainly uses methanol, ethylene glycol and other alcohols to undergo alcoholysis and then polymerize to prepare polyester chips, which are then processed into corresponding products; the physical method is to recover After PET polyester is cleaned, it is processed and reused by physical means. For example, recycled bottle flakes are spun into polyester and other materials. This process will reduce the intrinsic viscosity of the material, which limits its application. Some researchers use a twin-screw extruder to add a chain extender to the recycled polyester material to enhance its viscosity and expand the scope of application. The viscosi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/685C08G63/692C08L67/02C08K3/22C08K5/523C08K5/5399C08K3/26C08K3/32C08K3/34C08K5/3492C08J9/12C08J9/16
CPCC08G63/6856C08G63/6926C08J9/122C08J9/0095C08J9/0066C08J9/0038C08J9/0028C08J9/16C08J2367/02C08J2203/06
Inventor 刘坤坤许越超胡广君冯浪
Owner CHINA RESOURCES PACKAGING MATERIALS CO LTD
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