Hydrolysis-resistant polyester composition and preparation method of the composition solution and application thereof

A composition and hydrolysis-resistant technology, applied in the field of polyester, can solve the problems of anti-hydrolysis agents in the polluted environment, difficult process control, low content of diethylene glycol, etc., and achieve the effects of easy use, high intrinsic viscosity, and good hue

Active Publication Date: 2019-08-30
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composition solution can be used for the synthesis of PET, and is convenient to use. The prepared PET has a lower carboxyl-terminal content, a lower content of diethylene glycol, and a good hue. Disadvantages and deficiencies in polyester technology, such as: difficult process control, high production costs, and the need to add anti-hydrolysis agents that pollute the environment and are harmful to the human body, etc.

Method used

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  • Hydrolysis-resistant polyester composition and preparation method of the composition solution and application thereof
  • Hydrolysis-resistant polyester composition and preparation method of the composition solution and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Aluminum hydroxide is 1 part, potassium hydroxide is 1 part, ethylene glycol is 5 parts, trimethyl phosphate is 0.5 part, tetramethyl titanate is 0.25 part, polyethylene glycol (600) is 0.2 part, each Parts are expressed in moles of substance.

[0038] First weigh 15.6g (0.2mol) of aluminum hydroxide, 11.2g (0.2mol) of potassium hydroxide, and 62g (1mol) of ethylene glycol and place them in the reactor, and stir and react for 1 hour to become an intermediate solution. Add 11.0 g (0.05 mol) of tetramethyl titanate, 14.0 g (0.1 mol) of trimethyl phosphate, 24 g (0.04 mol) of polyethylene glycol (600), and stir the reaction for 3 hours at 80°C, remove A small molecule with a low boiling point becomes a stable composition solution A after cooling to room temperature.

[0039] Preparation of PET

[0040] In reactants 500g terephthalic acid (PTA), 260g ethylene glycol (EG) and titanium dioxide with a particle size of 0.3μ (based on the amount of polyester produced, the amou...

Embodiment 2

[0043] Aluminum acetate is 1 part, sodium hydroxide is 8 parts, ethylene glycol is 20 parts, triethyl phosphate is 4 parts, tetraethyl titanate is 1 part, polyethylene glycol (1500) is 0.05 parts, each Measured in moles of substance.

[0044] First weigh 40.8g (0.2mol) of aluminum acetate, 64g (1.6mol) of sodium hydroxide, and 248g (4mol) of ethylene glycol and place them in the reaction kettle, stir and react for 2 hours to form an intermediate solution, and add titanium to the intermediate solution. 45.6 g (0.2 mol) of tetraethyl phosphate, 145.6 g (0.8 mol) of triethyl phosphate, 15.0 g (0.01 mol) of polyethylene glycol (1500), and stirred for 1 hour under the condition of raising the temperature to 170° C. A small molecule with a boiling point becomes a stable composition solution B after cooling to room temperature.

[0045] Preparation of PET

[0046] The reactant 500g terephthalic acid (PTA), 260g ethylene glycol (EG) and calcium carbonate with a particle diameter of ...

Embodiment 3

[0049] Aluminum glycolate is 1 part, sodium hydroxide is 1 part, ethylene glycol is 10 parts, tributyl phosphate is 1 part, tetraisopropyl titanate is 0.5 parts, polyethylene glycol (800) is 0.1 parts , each in moles of substance.

[0050] First weigh 42.6g (0.2mol) of aluminum ethylene glycol, 8g (0.2mol) of sodium hydroxide, and 124g (2mol) of ethylene glycol and place them in the reactor, and stir and react for 1 hour to become an intermediate solution. Add 28g (0.1mol) of tetraisopropyl titanate, 53.2g (0.2mol) of tributyl phosphate, 16g (0.02mol) of polyethylene glycol (800), and stir the reaction for 1 hour at 170°C, remove A small molecule with a low boiling point becomes a stable composition solution C after cooling to room temperature.

[0051] Preparation of PET

[0052] In the reactant 500g terephthalic acid (PTA), 260g ethylene glycol (EG) and barium sulfate (based on the amount of polyester produced, the amount added is 2500×10 -6 ), adding composition solution...

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Abstract

The invention discloses a hydrolysis-resistant polyester composition and a preparation method of the composition solution and an application. As that aluminum compound and a basic compound are stirredand reacted in ethylene glycol to form an intermediate solution, a titanium compound, a phosphorus compound and polyethylene glycol are added into the intermediate solution, the temperature is raisedto 80-170 DEG C for stirring reaction to remove small molecules with low boiling point, and the temperature is cooled to room temperature to form a stable composition solution. A composition solutionis applied to the synthesis of polyethylene terephthalate, a polyester is synthesized by esterification and polymerization in a reactant system of purified terephthalic acid, ethylene glycol, and oneof micron titanium dioxide, micron barium sulfate, and micron calcium carbonate without the need to add other polymerization catalysts, and the composition may be added to the reaction system beforeor after esterification. The intrinsic viscosity of the polyester is 0.645-0.760 dL / g, and the content of carboxyl terminated group is low, so the polyester is widely used in photovoltaic solar backplane film and other fields.

Description

technical field [0001] The invention belongs to the field of polyester, and in particular relates to a preparation method and application of a composition solution for hydrolysis-resistant polyester. Background technique [0002] Polyethylene terephthalate (referred to as polyester, English abbreviated as PET) is a polymer produced mainly from purified terephthalic acid and ethylene glycol, because of its excellent mechanical properties, electrical insulation properties, Water vapor barrier performance, heat resistance, dimensional stability, chemical resistance and other comprehensive properties, widely used in fiber, film, packaging, components and other fields. However, ordinary polyester is very sensitive to high temperature and high humidity environment due to its residual carboxyl group, which leads to a rapid decline in the performance of PET materials, thus limiting the use of polyester in certain fields. [0003] Polyester has excellent hydrolysis resistance under ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/672C08G63/83C08G63/84C08G63/85C08K3/22C08K3/26C08K3/30
CPCC08G63/183C08G63/672C08G63/83C08G63/84C08G63/85C08K3/22C08K3/26C08K3/30C08K2003/2241C08K2003/265C08K2003/3045
Inventor 臧国强时宝琦李少山王铭松苑娜娟赵永冰张丽梅
Owner CHINA PETROLEUM & CHEM CORP
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