High-gas-barrier high-temperature-cooking-resistant transparent resin as well as preparation method and application thereof

A technology of transparent resin and high temperature resistance, which is applied in the field of food plastic packaging. It can solve the problems of inability to apply food packaging, poor heat resistance and gas barrier performance of PETG materials, and achieve improved miscibility, lower melt viscosity, and lower molecular weight. The effect of interaction force

Active Publication Date: 2022-04-22
FOSHAN HUIHONG PLASTIC MOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects that PETG materials in the prior art cannot be used in food packaging due to poor heat resistance and gas barrier performance, and provide a high-temperature resistant cooking transparent resin with high gas barrier

Method used

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  • High-gas-barrier high-temperature-cooking-resistant transparent resin as well as preparation method and application thereof
  • High-gas-barrier high-temperature-cooking-resistant transparent resin as well as preparation method and application thereof
  • High-gas-barrier high-temperature-cooking-resistant transparent resin as well as preparation method and application thereof

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Experimental program
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preparation example Construction

[0055] (1) Preparation of polyimide

[0056] S1. Introduce nitrogen into the reaction kettle, then according to the formula shown in Table 1, add solvent N,N-dimethylacetamide (700~1000mL), diamine compound and alicyclic carboxylic acid dianhydride successively at room temperature (20-30°C) to react for 8-10 hours; then add end-capping agent monocarboxylic acid anhydride to continue reaction for 3-6 hours;

[0057] S2. Continue to add the dehydration cyclization catalyst to carry out the dehydration cyclization reaction (also known as imidization reaction) for 16-24 hours, and then obtain polyimide (PEI) after filtering, washing and drying.

[0058] Table 1 Different polyimide formulations and dosage (g)

[0059]

[0060]

[0061] (2) Preparation of high-temperature cooking-resistant transparent resin with high gas barrier

Embodiment 1～9

[0063] The embodiments of the present application provide a series of high-temperature-resistant retort transparent resins with high gas barrier properties, which are prepared according to the following steps:

[0064] According to the formula in Table 2, put PETG, polyimide and end-capped polyurethane prepolymer into a high-speed mixer and mix until uniform, and then pass through a twin-screw extruder at a temperature of 200-260 ° C and a speed of 100 It is obtained by melt extrusion and granulation under the condition of ~150rpm.

[0065] Table 2 High temperature resistant cooking transparent resin formulation and dosage (parts by weight) of high gas barrier

[0066]

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Abstract

The invention provides high-gas-barrier high-temperature-cooking-resistant transparent resin as well as a preparation method and application thereof. The high-gas-barrier high-temperature-cooking-resistant transparent resin disclosed by the invention is prepared from the following components in parts by weight: 62-78 parts of PETG (Polyethylene Terephthalate Glycol); 19 to 32 parts of polyimide; 3 to 6 parts of an end-capped polyurethane prepolymer; wherein the polyimide is obtained by reacting alicyclic carboxylic acid dianhydride with a diamine compound, and the diamine compound comprises triphenylmethane diamine and hydroxyl-containing diamine. According to the invention, under the synergistic effect of the polyimide with the specific molecular chain structure and the terminated polyurethane prepolymer, the prepared resin can still have better gas barrier performance (oxygen permeation amount lt; 80 cm < 3 > / m < 2 > * 24h * 0.1 MPa), is free of deformation and can be widely applied to the field of food packaging.

Description

technical field [0001] The invention belongs to the technical field of food plastic packaging, and in particular relates to a high-temperature-resistant retort-resistant transparent resin with high gas barrier and its preparation method and application. Background technique [0002] Polyethylene terephthalate-1,4-cyclohexanedimethanol (PETG) is a copolyester polymerized from terephthalic acid, ethylene glycol and 1,4-cyclohexanedimethanol. It has the advantages of high transparency, high impact strength, good processing fluidity, low molding temperature, good ductility and excellent chemical resistance; but PETG has poor heat resistance and low heat distortion temperature, and generally can only be used normally below 80 °C , PETG is suitable for forming thick-walled transparent products, and is currently mostly used for packaging such as cosmetics and perfume bottles. [0003] With the increasing emphasis on food safety, food packaging needs to undergo strict high-temperat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L79/08C08L75/04C08G73/10
CPCC08L67/02C08G73/1042C08G73/1078C08L2201/08C08L2201/10C08L2201/14C08L2205/05C08L79/08C08L75/04
Inventor 梁志文刘洋梁庭聪谭力洪周运生周漓
Owner FOSHAN HUIHONG PLASTIC MOLD
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