Polyester with excellent heat resistance and method for producing same

A manufacturing method and polyester technology, applied in the field of polyester, can solve the problems of low purity of ethylene glycol and low melting point of polymers, and achieve the effects of improving production efficiency, suppressing the generation of foreign matter, and suppressing mold head contamination

Active Publication Date: 2014-01-08
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the purity of ethylene glycol derived from biomass resources is low, the

Method used

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  • Polyester with excellent heat resistance and method for producing same
  • Polyester with excellent heat resistance and method for producing same
  • Polyester with excellent heat resistance and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0076] The present invention is illustrated more specifically by the following examples.

[0077] Raw materials used in purification and polymerization are as follows.

[0078] ・Ethylene glycol derived from biomass resources: manufactured by Changchun Dacheng Group, (ethylene glycol = 98.138% by weight, 1,2-propanediol = 5410ppm, 1,2-butanediol = 2390ppm, 2,3-butanediol =6310ppm, 1,4-butanediol=4510ppm).

[0079] ・Ethylene glycol derived from petrochemical resources: manufactured by Mitsubishi Chemical Corporation, (ethylene glycol = 99.989% by weight, 1,2-propanediol < 15 ppm (not detected), diethylene glycol = 110 ppm)

[0080] · Terephthalic acid: High-purity terephthalic acid (1,2-propanediol < 15ppm (not detected)) manufactured by Mitsui Chemicals Co., Ltd.

[0081] ・Dimethyl terephthalate: SK Chemical Co., Ltd. (1,2-propanediol < 15 ppm (not detected))

[0082] ・Polyethylene glycol: manufactured by Sanyo Chemical Co., Ltd. (1,2-propanediol<15ppm (not detected)), avera...

reference example 1

[0152] The obtained ethylene glycol derived from 20 kg of biomass resources (manufactured by Changchun Dacheng Group) was subjected to a distillation operation under the conditions of 40 stages of theoretical plates, a pressure of 50 mmHg, and a reflux ratio of 10 to obtain crude ethylene glycol as a bottom residue. This crude ethylene glycol contained 3510 ppm of 1,2-propanediol. The obtained crude ethylene glycol was heated in a heating tank with a set temperature of 190° C. for 15 hours, and then cooled to room temperature.

[0153] On the other hand, activated carbon (manufactured by Futura Chemical Industry Co., Ltd.: Taihe SGA) was washed with soft water, dried, and the dried activated carbon was filled in an activated carbon treatment facility. The thickness of the activated carbon layer is 300 cm, and the space velocity is 0.57 / hour. After the above-mentioned heated and cooled crude ethylene glycol flows through the activated carbon layer, it is collected. Biomass res...

reference example 2

[0155] Except that the thickness of the activated carbon layer was 200 cm and the space velocity was 0.86 / hour, ethylene glycol (purified product) derived from biomass resources with a content of 1,2-propanediol of 900 ppm was finally obtained in the same manner as in Reference Example 1. .

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Abstract

To provide polyester which has excellent thermostability with only a small reduction in intrinsic viscosity during melt molding. A polyester obtained from a dicarboxylic acid, and/or an ester-forming derivative thereof, and a diol which is characterized by the fact that it contains 15 to 500 ppm of a 1,2-propanediol-derived component.

Description

technical field [0001] The present invention relates to polyester excellent in heat resistance. More specifically, it relates to a polyester having a small decrease in intrinsic viscosity during melt molding and a method for producing the same. Background technique [0002] Polyester, due to its excellent mechanical strength, chemical stability, transparency, and low price, has become one of the most widely used synthetic resins in the world in the form of various fibers, films, sheets, containers, etc. Among them, polyethylene terephthalate is excellent in versatility and practicality, and can be favorably used. [0003] Polyethylene terephthalate is usually produced from terephthalic acid or its ester-forming derivatives, and ethylene glycol, but these raw materials are usually obtained from petrochemical resources. Petroleum, as a petrochemical resource, is an important raw material in the chemical industry, but it may be exhausted in the future, and a large amount of c...

Claims

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Application Information

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IPC IPC(8): C08G63/16C07C31/20
CPCC08G63/672C07C29/76C07C29/80C08G63/6886C08G63/00C08G63/183C07C31/202C08G63/16C08G63/78C07C31/20
Inventor 大久保拓郎田中阳一郎森本国弘
Owner TORAY IND INC
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