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Diol-modified PETG polyester chip and production process thereof

A technology of polyester chips and diols, which is applied in the field of diol-modified PETG polyester chips and its production process, which can solve the problems of product color difference, high production cost, and poor toughness of PETG polyester, and achieve easy raw materials Obtain the effect of better product performance and better product performance

Active Publication Date: 2020-01-14
JIANGYIN HUAHONG CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Using neopentyl glycol (NPG) instead of CHDM to modify and copolymerize PETG, the obtained neopentyl glycol modified PETG polyester has poor toughness and brittle products; in addition, it is common to use batch devices in the production process. There are the following problems: intermittent production in batches, high production cost; there are differences in each batch of materials, and there are differences in the head and tail materials in a batch of materials; the color of the product is poor, and it can only barely be used in the "shrink film" industry that does not require high hue. It cannot be used in industries and products that have high requirements for transparency and color, such as sheets, plates, bottles, etc.

Method used

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  • Diol-modified PETG polyester chip and production process thereof
  • Diol-modified PETG polyester chip and production process thereof
  • Diol-modified PETG polyester chip and production process thereof

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Embodiment Construction

[0032] The specific implementation modes provided by the present invention will be described in detail below in conjunction with the examples.

[0033] Terephthalic acid (PTA) used in the examples of the present invention was purchased from Jiangyin Hanbang Petrochemical Co., Ltd., neopentyl glycol (NPG) was purchased from Jihua BASF Co., Ltd., and diethylene glycol (DEG) was purchased from Saudi Petroleum Corporation. , Ethylene glycol (MEG) was purchased from Sabic Company, and catalyst ethylene glycol antimony was purchased from Liaoyang Synthetic Catalyst Co., Ltd.

[0034] The ratio of raw materials of embodiment 1 and 2 and comparative examples 1~4 is as shown in table 1:

[0035] Table 1 Slurry deployment (batching according to the following molar ratio)

[0036] Example 1 Example 2 Comparative example 1 Comparative example 2 Comparative example 3 Comparative example 4 PTA 1 1 1 1 1 1 MEG 0.6 0.8 0.6 0.8 1.2 1.5 NPG 0.5 ...

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Abstract

The invention discloses a diol-modified PETG polyester chip, which is prepared from the following raw materials: the molar ratio of terephthalic acid, neopentyl glycol, diethylene glycol and ethyleneglycol is 1: (0.1-0.5): (0.05-0.1): (0.6-0.8). The invention adopts terephthalic acid, neopentyl glycol, diethylene glycol and ethylene glycol, which are relatively low in cost and easily available, as reaction raw materials, and produces PETG polyester chips with stable quality, color transparency and the like meeting the requirements of diol modification for sheets, plates and bottles on a continuous polymerization device.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a glycol-modified PETG polyester chip and a production process thereof. Background technique [0002] Plastic films such as printing, sleeves, and labels used for food packaging have been using toxic PVC heat-shrinkable films before. The annual consumption of PVC heat-shrinkable films in China is more than 200,000 tons. Developed countries such as Europe, America, Japan, and South Korea have banned PVC materials. . China is also gradually banning the use of toxic PVC products in food and beverage packaging. [0003] The full name of PETG polyester is polyethylene terephthalate-1,4-cyclohexanedimethanol ester, which is an amorphous polyester with toughness, weather resistance, chemical resistance, environmental protection, economic characteristics. PETG is the best product to replace PVC because of its good transparency, printing performance, high heat shrinkage rate ...

Claims

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Application Information

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IPC IPC(8): C08G63/672C08G63/78
CPCC08G63/672C08G63/78
Inventor 马德义王祖宏胡士清杜永峰胡耀那海锋夏佳
Owner JIANGYIN HUAHONG CHEM FIBER
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