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Synthesis method of aliphatic low unsaturation polyether polyol

A technology of polyether polyol and synthesis method, which is applied in the field of polyether polyol, can solve the problems of cumbersome process, excessive three wastes, and long catalyst induction period, and achieve the effects of expanding application range, high economic value, and short production cycle

Inactive Publication Date: 2019-10-25
荆晓东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] This application explores a method of synthesizing polyether polyols with low unsaturation using aliphatic alcohols as a starting agent, and overcomes the problems of long catalyst induction period, many wastes and cumbersome process in the prior art using the above preparation method. , develop a new preparation method of polyether polyol with low unsaturation and high activity, and develop the application of polyether polyol with low unsaturation in the field of polyurethane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The synthetic method of aliphatic low unsaturation polyether polyol of the present invention, specifically C 8 Alcohol (fatty alcohol with 8 carbon atoms) 400g, DMC0.065g, phosphoric acid 0.004g are put into a 5L autoclave at room temperature, replaced by nitrogen 6 times, and the temperature rises to 110°C to start the pre-drop reaction of 50gPO. After the pre-drop is successful, add 38gPO and A mixture of 1672g of EO, the reaction temperature is 110°C, after the reaction is completed, it is matured for 3h, and the monomer is removed for 1h and the temperature is lowered to 60°C for discharge.

[0025] The OHV of the aliphatic low unsaturation polyether polyol prepared in Example 1 was measured to be 78.3 mgKOH, the VIS to be 248 mPa.s (25°C), and the cloud point to be 10.5°C.

Embodiment 2

[0027] The synthetic method of aliphatic low unsaturation polyether polyol of the present invention, specifically C 16 400g of alcohol, 0.093g of DMC, 0.004g of sulfuric acid were put into a 5L autoclave at room temperature, replaced by nitrogen 8 times, and the temperature was raised to 112°C to start the pre-drop reaction of 50gPO. After the completion of the aging process for 3 hours, the monomer was removed for 1.2 hours and the temperature was lowered to 60°C for discharge.

[0028] The OHV of the aliphatic low-unsaturation polyether polyol prepared in Example 2 was measured to be 28.3 mgKOH, the VIS to be 195 mPa.s (25° C.), and the cloud point to be 13.5° C.

Embodiment 3

[0030] The synthetic method of aliphatic low unsaturation polyether polyol of the present invention, specifically C 22 400g of alcohol, 0.021g of DMC and 0.004g of phosphoric acid were put into a 5L autoclave at room temperature, replaced by nitrogen 6 times, and the temperature was raised to 113°C to start the pre-drop reaction of 50gPO. After the completion of the aging process for 2.5 hours, the monomer was removed for 1.5 hours and the temperature was lowered to 60°C for discharge.

[0031] The OHV of the aliphatic low-unsaturation polyether polyol prepared in Example 3 was measured to be 100 mgKOH, the VIS to be 110 mPa.s (25° C.), and the cloud point to be 16.1° C.

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Abstract

The invention belongs to the technical field of polyether polyol, and particularly relates to a synthesis method of aliphatic low unsaturation polyether polyol. The synthesis method includes the following steps that fatty alcohol, a bimetallic catalyst and acid are put into a high-pressure reactor, nitrogen replacement is conducted for 5 to 8 times, the temperature is raised to 110-115 DEG C, a mixture of propylene epoxide and ethylene oxide is added for reaction, after the reaction, curing is conducted, demonomerization is conducted, and the aliphatic low unsaturation polyether polyol is prepared. The synthesis method of the aliphatic low unsaturation polyether polyol is simple and easy to operate, the production cycle is short, economic value is high, produced three wastes are less, an environmental protection product is brought, the prepared aliphatic low unsaturation polyether polyol has high activity, and the application range of low unsaturation polyether polyol in polyurethane fields is expanded.

Description

technical field [0001] The invention belongs to the technical field of polyether polyols, and in particular relates to a method for synthesizing polyether polyols with low aliphatic degree of unsaturation. Background technique [0002] Polyether polyol is one of the main raw materials for the synthesis of polyurethane materials. With the expansion of polyurethane application fields, highly reactive polyether polyols with low unsaturation and improved polyurethane reaction speed are increasingly recognized by the market. [0003] Polyether polyols are oligomers with ether linkages (-R-O-R-) in the main chain and more than 2 hydroxyl groups (-OH) in the end or side groups. It is formed by ring-opening polymerization with low-molecular-weight polyols, polyamines or active hydrogen-containing compounds under the action of a catalyst. Polyether polyols with different functionalities can be prepared according to the number of active atoms contained in the initiator. [0004] The...

Claims

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Application Information

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IPC IPC(8): C08G65/28C08G18/48
CPCC08G65/2609C08G18/4837
Inventor 荆晓东
Owner 荆晓东