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Polyester polyol and preparation method and application thereof

A technology for polyester polyol and diol, which is applied in the field of polyester polyol and its preparation, and can solve the problems of reducing 1,4-dioxane and the like

Pending Publication Date: 2021-04-16
SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the amount of 1,4-dioxane it produces needs to be further reduced

Method used

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  • Polyester polyol and preparation method and application thereof
  • Polyester polyol and preparation method and application thereof
  • Polyester polyol and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of polyester polyol is provided in this embodiment, the preparation raw material of described polyester polyol is calculated by weight percentage, comprises the following components:

[0042]

[0043] The preparation method comprises the following steps:

[0044] (1) Under nitrogen protection, diethylene glycol, adipic acid, triethylphosphonoacetate and triphenyl phosphite were added in a 500mL four-necked reaction flask (the flask was equipped with a heating mantle, a magnetic stirrer, temperature probe, customized distillation head, condensing reflux device and receiving bottle cooled by ice-salt bath), stir evenly, raise the temperature to 140°C for 60 minutes, and then raise the temperature to 220°C at a constant rate of 20°C / h for esterification and dehydration reaction. The reaction time is 4h;

[0045] (2) Add tetraisopropyl titanate to the reaction solution in step (1), keep it warm at 220°C for 60 minutes, and then carry out polycondensation reaction...

Embodiment 2

[0048] A kind of polyester polyol is provided in this embodiment, the preparation raw material of described polyester polyol is calculated by weight percentage, comprises the following components:

[0049]

[0050] The preparation method includes the following steps:

[0051] (1) Under nitrogen protection, add diethylene glycol, ethylene glycol, adipic acid, triethyl methanephosphonate and tris(2,4-di-tert-butylphenyl)phosphite into a 500mL four-necked reaction flask (The flask is equipped with a heating mantle, a magnetic stirrer, a temperature probe, a custom-made distillation head, a condensing reflux device, and a receiving flask cooled by an ice-salt bath), stir evenly, raise the temperature to 130°C for 30min, and then react at a rate of 30°C / h The temperature was raised to 230°C at a uniform speed to carry out the esterification and dehydration reaction, and the reaction time was 3 hours;

[0052] (2) Add tetraisopropyl titanate to the reaction solution in step (1),...

Embodiment 3

[0055] A kind of polyester polyol is provided in this embodiment, the preparation raw material of described polyester polyol is calculated by weight percentage, comprises the following components:

[0056]

[0057] The preparation method includes the following steps:

[0058] (1) Under nitrogen protection, diethylene glycol, ethylene glycol, succinic acid, triethylphosphonoacetate and dioctadecylpentaerythritol diphosphite were added in a 500mL four-necked reaction flask (the flask Equipped with a heating mantle, magnetic stirrer, temperature probe, custom-made distillation head, condensing reflux device and ice-salt bath cooled receiving flask), stir evenly, raise the temperature to 150°C for 120min, and then raise the temperature at a constant rate of 5°C / h to 210°C, carry out esterification and dehydration reaction, the reaction time is 5h;

[0059] (2) Add tetra-n-butyl titanate to the reaction liquid in step (1), keep it warm at 210°C for 180 minutes, and then carry o...

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Abstract

The invention provides polyester polyol and a preparation method and application thereof. The polyester polyol is prepared from, by weight, 20%-55% of diethylene glycol, 0-25% of dihydric alcohol except diethylene glycol, 45%-65% of aliphatic dibasic acid, 0.001%-0.1% of stabilizer and 0.002%-0.02% of catalyst. The stabilizer is added to limit generation of 1, 4-dioxane byproducts in the polyester polyol preparation process, the generation amount of 1, 4-dioxane can be limited to be smaller than 7 g / kg of diethylene glycol, preferably smaller than 4 g / kg of diethylene glycol, or the amount of 1, 4-dioxane can be limited to be smaller than 3 g / kg of polyester polyol, preferably, less than 2 grams per kilogram of polyester polyol. The polyester polyol disclosed by the invention can be applied to universal polyurethane products such as coatings and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of aliphatic polyester polyols, relates to a polyester polyol and its preparation method and application, in particular to a polyester polyol with low 1,4-dioxane by-products and Its preparation method and application. Background technique [0002] Polyester polyols, especially aliphatic polyester polyols, are intermediates of many polyurethane adhesives, coatings, and elastomers. When preparing aliphatic polyester polyols, such as polyester polyols prepared from adipic acid and diethylene glycol, a by-product of 1,4-dioxane will be produced during the reaction. During plant production, 1,4-dioxane produced as a distillate is discharged together with esterification water and must then, for example, be decomposed or concentrated and incinerated in sewage treatment, while this additionally introduced process step Resulting in an increase in the cost of producing polyester polyols. [0003] CN...

Claims

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Application Information

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IPC IPC(8): C08G63/672C08G63/78C08G18/42
Inventor 徐耀维肖丽群朱彦杜宗波汪忠敏唐劲松
Owner SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD