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Low pressure resistant polyethylene terephthalate resin and producing method thereof

A technology of ethylene phthalate and production method, applied in the field of polyethylene terephthalate resin, can solve the problems of high post-processing cost, high price, unsuitability for soda water packaging, etc. cost effect

Active Publication Date: 2008-01-09
新疆维格瑞生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, carbonic acid grade resin has high intrinsic viscosity, high price, and high post-processing cost. From the perspective of economic benefits, it is not suitable for the packaging of soda water.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1, this low pressure resistant polyethylene terephthalate resin contains: terephthalic acid, 1.7% isophthalic acid, 31.5% ethylene glycol, 0.3% diethylene glycol, Catalyst 230ppm, stabilizer 20ppm and the balance of terephthalic acid.

Embodiment 2

[0038] Embodiment 2, this low pressure resistant polyethylene terephthalate resin contains by raw material weight percentage: 2.0% isophthalic acid, 32% ethylene glycol, 0.5% diethylene glycol, catalyst 350ppm, stabilizer 40ppm and the balance of terephthalic acid.

Embodiment 3

[0039] Embodiment 3, this low pressure resistant polyethylene terephthalate resin contains by raw material weight percentage: 1.8% isophthalic acid, 32% ethylene glycol, 0.4% diethylene glycol, catalyst 290ppm, stabilizer 30ppm and the balance of terephthalic acid.

[0040] In the above embodiment: the catalyst can be antimony trioxide or antimony acetate or antimony glycol or germanium dioxide, and the stabilizer can be phosphoric acid or polyphosphoric acid or phosphorous acid or trimethyl phosphate or triphenyl phosphate.

[0041] The foregoing examples can be obtained by one of the following production methods:

[0042] The first step of beating: Put the required amount of terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol, catalyst and stabilizer into the slurry mixing tank and fully mix;

[0043] The second step of esterification reaction: when the esterification reaction pressure is 0.07MPa or 0.17MPa or 0.27Mpa, the esterification reaction tempera...

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PUM

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Abstract

A low-pressure-resisting polypara-formate ethylene glycol ester resin contains isophthalic acid, ethylene glycol, diglycol, catalyst, stabilizer and p-phthalic acid; catalyst is antimony or cellulose antimony or Germanic oxide, stabilizer is phosphoric acid or poly-phosphoric acid or phosphorous acid or tri-methyl phosphate or tri-phenyl phosphate. The process is carried out by beating, esterification reacting, polymerization reacting, dicing, pre-crystallizing, crystallizing, solid-phase polymerizing, and fluidized cooling to obtain final product. It costs low and can be used to produce soda beverage bottle.

Description

technical field [0001] The invention relates to the technical field of polyethylene terephthalate resin, and relates to a low-pressure resistant polyethylene terephthalate resin, a production method thereof and a low-pressure resistant bottle. Background technique [0002] Polyethylene terephthalate resin (PET) is widely used in spinning and packaging, and packaging is mainly used in the food field, such as: water, fruit juice, milk, carbonated beverages, etc. [0003] Drinking soda is more popular abroad. The chemical name of soda is sodium bicarbonate (NaHCO 3 ), when dissolved in water, can release a large amount of carbon dioxide (CO 2 ). Soda water is slightly alkaline. The environment inside the human body is weakly alkaline. We eat a lot of meat and fish every day, which are acidic foods. Therefore, an acid-base balance is required. Then, eating more alkaline foods is more beneficial to your health. Soda is good for the stomach because it neutralizes stomach a...

Claims

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Application Information

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IPC IPC(8): C08G63/183C08G63/78
Inventor 潘哆吉王永刚丁建萍李智元徐东郭志诚
Owner 新疆维格瑞生物科技有限公司
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