Preparation method of low-VOC high-activity high-molecular-weight polyether polyol

A technology of polyether polyol and high molecular weight, which is applied in the field of polyether polyol to achieve the effect of simple process, reducing the content of aldehydes, and suppressing the production of unsaturated aldehydes

Inactive Publication Date: 2018-09-04
HANGJIN TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the technical problems in the preparation of low-VOC high-activity high-molecular-weight polyether polyols

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 129.72g of glycerin and 13.18g of 90% KOH into a 10L polymerization reactor, replace with nitrogen 5 times, raise the temperature to 90-110°C, slowly add 5837g of propylene oxide, control the reaction temperature at 100-130°C, and the reaction pressure is less than 0.43 MPa , carry out polymerization reaction and aging for 1 h, then slowly add 1012 g of ethylene oxide, control the reaction temperature at 100-130 ° C, and the reaction pressure is less than 0.43 MPa, carry out polymerization reaction and aging for 1 h, and then vacuum degas for 1 h to obtain 6978.72 g of crude polyether.

[0018] Transfer the high-activity crude polyether polyol obtained above to a refining treatment tank, stir and raise the temperature to 80°C, add 105g of water and 139g of new adsorbent, replace with nitrogen after vacuuming, mix at 80-90°C for 2 hours, and heat up to 100°C «130 ℃ to remove moisture under reduced pressure, and obtain high activity and low VOC polyether polyol product...

Embodiment 2

[0020] Add 129g of glycerin and 14g of 90% KOH to a 10L polymerization reactor, replace with nitrogen 5 times, raise the temperature to 90-110°C, slowly add 5,797g of propylene oxide, control the reaction temperature at 100-130°C, and the reaction pressure is less than 0.43 MPa. Polymerization was matured for 1 h, then 1032 g of ethylene oxide was slowly added, the reaction temperature was controlled at 100-130 °C, the reaction pressure was less than 0.43 MPa, the polymerization was matured for 1 h, and then vacuum degassed for 1 h to obtain 6958 g of crude polyether.

[0021] Transfer the high-activity crude polyether polyol obtained above to a refining treatment tank, stir and heat up to 80°C, add 138g of water and 277g of new adsorbent, replace with nitrogen after vacuuming, mix at 80-90°C for 2 hours, and heat up to 100-100°C Remove moisture under reduced pressure at 130 °C, and obtain high activity and low VOC polyether polyol products after filtration.

Embodiment 3

[0023] Add 128.8g of glycerin and 15.4g of 90% KOH into a 10L polymerization reactor, replace with nitrogen 5 times, raise the temperature to 90-110°C, and slowly add 5807g of propylene oxide. Control the reaction temperature at 100-130°C, the reaction pressure is less than 0.43 MPa, carry out polymerization reaction and aging for 1 hour, then slowly add 1022g of ethylene oxide, control the reaction temperature at 100-130°C, and the reaction pressure is less than 0.43 MPa, carry out polymerization reaction and aging for 1 hour, Then vacuum degassing for 1 h to obtain 6957 g of crude polyether.

[0024] Transfer the high-activity crude polyether polyol obtained above to a refining treatment tank, stir and heat up to 80°C, add 120g of water and 208g of new adsorbent, replace with nitrogen after vacuuming, mix at 80-90°C for 2 hours, and heat up to 100-100°C Remove moisture under reduced pressure at 130°C, and obtain low-VOC, high-activity, and high-molecular-weight polyether pol...

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Abstract

The invention provides a preparation method of low-VOC high-activity high-molecular-weight polyether polyol. According to the method, glycerol is used as an initiator to perform polymerization reaction with propylene epoxide under the effect of a low-alkali-content catalyst; then, ethylene oxide is used for end capping; the low-alkali-content catalyzed high-activity high-molecular-weight polyetherpolyol is added into a sealed reaction kettle; deionized water and an efficient refining adsorbent are added; nitrogen replacement is performed; mixing refining and adsorption are performed at a certain temperature; next, after dewatering and filtering, a low-VOC high-activity high-molecular-weight polyether polyol product is obtained. The method provided by the invention has the advantages thatthe technical flow process is simplified; an acid neutralization process is not used; the generation of aldehydes substances in the neutralization process is avoided; by using the efficient refining adsorbent, aldehydes and other impurities generated in the production process of polyether polyol can be effectively adsorbed; finally, the goal of reducing the VOC content in the polyether polyol is achieved. The method is suitable for being applied as a preparation method of the low-VOC high-activity high-molecular-weight polyether polyol.

Description

technical field [0001] The invention proposes a method for preparing a low-VOC high-activity high-molecular-weight polyether polyol in the technical field of polyether polyol. Background technique [0002] Polyether polyol is an important chemical raw material and the main raw material for the production of polyurethane (PU) products. High activity and high molecular weight polyether polyol is one of the most widely used polyether polyols. Its products are mostly used in daily life and Office supplies, so their environmental protection requirements are becoming higher and higher, and non-toxic polyurethane materials are becoming an important standard for testing product grades. VOC refers to the general term for low-molecular-weight alcohols, aldehydes, amines, esters and aromatics in polyurethane products that can be emitted into the environment, and its content is one of the important criteria for measuring the environmental protection level of products. The VOC of polyur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/26C08G65/30
CPCC08G65/2609C08G65/2648C08G65/30
Inventor 张格亮吴广铎刘晓会赵哲孙海涛张学兵刘涛侯芳赵静
Owner HANGJIN TECHNOLOGY CO LTD
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