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Synthetic method for triethanolamine block polyether

A technology of triethanolamine block and ethanolamine block, which is applied in chemical instruments and methods, preparation of organic compounds, preparation of amino hydroxyl compounds, etc., can solve the problems of high reactivity, unstable products, low molecular weight, etc., and achieve metal ion The effect of low content, easy control, and low equipment requirements

Active Publication Date: 2011-01-12
ZHEJIANG HUANGMA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Low molecular weight, low viscosity, high reactivity and poor control, unstable products for processing polyurethane foam

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: Add 61g of triethanolamine and 2.8g of powdered sodium methoxide into the reaction kettle, raise the temperature to 130°C, vacuum dehydrate for 1 hour, add 400g of propylene oxide, and add 100g of cycloheximide after the reaction is complete at 130-135°C After the oxyethane reaction is complete, cool down to 80°C and add 30g of distilled water, 5.6g of phosphoric acid, and 6g of polyether adsorbent, heat up to 120°C for dehydration for 1 hour, then cool down to 80°C to discharge.

Embodiment 2

[0018] Example 2: Add 62g of triethanolamine and 50% aqueous solution of KOH2.8g into the reaction kettle, heat up to 130°C, vacuum dehydrate for 1 hour, add 800g of propylene oxide, after the reaction is complete at 130-135°C, then After adding 300g of ethylene oxide to complete the reaction, cool down to 80°C, add 60g of distilled water, 5.6g of phosphoric acid, and 12g of polyether adsorbent, heat up to 120°C for dehydration for 1 hour, then cool down to 80°C to discharge.

Embodiment 3

[0019] Embodiment 3: add the mixture of 62g triethanolamine and 5.0g powdery sodium methylate and NaOH (by 1: 1 ratio batching) in reactor, be warming up to 130 ℃, after vacuum dehydration 1 hour, add propylene oxide 1200g, in After the reaction is complete at 130-135°C, add 400g of ethylene oxide. After the reaction is complete, cool down to 80°C and add 75g of distilled water, 10.0g of phosphoric acid, and 17g of polyether adsorbent. material.

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PUM

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Abstract

A synthesis method of triethanolamine block polyether pertains to synthesis of organic compound, in which triethanolamine, propylene oxide, ethylene oxide are used as raw materials, propylene oxide is added in presence of catalyst for polymerization, then ethylene oxide is added for polymerization to obtain product, wherein the catalyst is one of or mixture of more than one matters in solid sodium methoxide, methanol solution of sodium methoxide, KOH, NaOH, and amount of added matter is between 0.1 and 0.6 wt. % of prepared triethanolamine block polyether. The invention adopts reaction process including two steps of adding propylene oxide and adding ethylene oxide, which is easy to control, with mild reaction condition, low demand to apparatus. The prepared triethanolamine block polyetherhas great heat and alkali resistance. The method can be used to prepare products of various viscosity demand, and to process polyurethane foam plastics with the advantages of mild reaction condition and easiness to control.

Description

technical field [0001] The invention relates to a synthesis method of triethanolamine block polyether, which belongs to the technical field of synthesis of organic compounds. Background technique [0002] Most of the existing triethanolamine polyethers are synthesized by single addition of propylene oxide or ethylene oxide. Low molecular weight, low viscosity, high reactivity and poor control, the products used to process polyurethane foam are unstable. Contents of the invention [0003] The purpose of the present invention is to provide a synthetic method of triethanolamine block polyether with reasonable process, simple operation and good usability. [0004] The present invention is the synthetic method of triethanolamine block polyether, take triethanolamine, propylene oxide (PO), ethylene oxide (EO) as raw material, it is characterized in that under the existence of catalyst, first add propylene oxide to carry out polymerization reaction , and then add ethylene oxide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/28C08G65/46C07C217/08C07C213/00
Inventor 王伟松王新荣孟照平马定连张月江
Owner ZHEJIANG HUANGMA TECH