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A polyester gas barrier resin and a process thereof

A technology of resin and resin composition, which is applied in the field of preparation of the resin composition, can solve the problems of reducing the effectiveness of the gas barrier performance of nanoparticles and affecting the transparency of the final container, and achieve the effect of improving the gas barrier performance

Inactive Publication Date: 2009-02-11
FUTURA POLYESTERS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This reduces the effectiveness of the nanoparticles in providing gas barrier properties and also affects the clarity of the final container

Method used

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  • A polyester gas barrier resin and a process thereof
  • A polyester gas barrier resin and a process thereof
  • A polyester gas barrier resin and a process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] 10.38 kg of pure terephthalic acid and 4.46 kg of monoethylene glycol were added to the esterification reactor in a molar ratio of 1:1.4. Thereto was added a nucleating agent, sodium benzoate, 50 ppm (0.6 g). Next to the above mixture were further added a polymerization catalyst antimony trioxide, 240 ppm (3.44 g) as Sb, cobalt acetate as a colorant, 20 ppm (1.01 g) as cobalt, a red toner 1.5 ppm (0.018 g) and a blue toner agent 1.2ppm (0.014g). The esterification reaction was carried out at a temperature of 240-265°C for 190 minutes. The esterified prepolymer is transferred to the polycondensation reactor.

[0057] Before starting the polymerization, triethyl phosphoryl acetate, 50 ppm as P (TEPA, 4.34 g) and the CFRH additive, transition metal oxide, 10 ppm (0.12 g) were added. The polymerization was carried out at a temperature of 265-290° C. and 5-15 mbar for 180 minutes. The polymer melt was continuously stirred for 20 minutes and then the amorphous alloy polye...

Embodiment 2

[0059] In this example, the resin composition and process conditions were the same as in Example 1. Nanoclay was additionally introduced into the resin at 50 ppm as a nanoadditive during the preparation of the preforms in the DMF suspension. The suspension was prepared by suspending 1.5 g of nanoclay with a particle size of 20-100 nm in 100 ml of DMF with a viscosity of 0.92 cP at 20°C. The suspension was sonicated in a sonicator at a frequency of 33 KHz for 60 minutes until the nanoclay particles were completely dispersed into the suspension. This suspension was then introduced into the dosing unit of the injection molding machine, and the dosing amount was set so that the ratio of nanoclay to PET resin was 50 ppm.

Embodiment 3

[0061] The resin composition of Example 3 is similar to that of Example 2, but the dosage of nano-additives is increased, that is, 500 ppm.

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Abstract

A preform resin composition is disclosed, comprising PET resin and a suspension of nano clay particles in an amount of 50 to 5000 ppm with respect to the resin, wherein the nano clay particles have a particle size ranging between 20 and 100 nm and are ultrasonically dispersed in a suspension medium, such as DMF. A method of making the perform resin is also disclosed.

Description

technical field [0001] The invention belongs to the field of polymer-based gas barrier resins. [0002] More particularly, the present invention relates to the preparation method of the resin composition. Background technique [0003] The barrier properties of a polymer container relate to the ability of the polymer to slow or prevent the passage of gas through its wall thickness. Barrier properties are most commonly characterized quantitatively by measuring the permeability of a polymer, which is the rate at which a given gas passes through the polymer under set conditions. Permeability is quantitatively characterized by a material property called the diffusion coefficient or diffusion constant, D. This constant is how easily the gas can pass through the material. A low permeability indicates that the gas is difficult to pass through the material, usually over a longer period of time, and sometimes at high pressure and / or high temperature. In the packaging industry, pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K3/34C08J3/205
CPCC08J5/005C08J2367/02C08J3/2056B82Y30/00C08K3/00C08K7/18C08L67/03
Inventor K·S·塔马吉S·G·K·帕兰尼安达瓦尔T·P·莫汉M·拉马莫尔蒂B·迪利拉尔M·S·拉贾
Owner FUTURA POLYESTERS LTD