Preparation method of allyl polyether

An allyl polyether and allyl technology, which is applied in the field of preparation of allyl polyether, can solve the problems of large amount of catalyst, wide molecular weight distribution, and large loss of double bonds, etc., and achieve narrow molecular weight distribution, double bond Effect of high key value and low quality score

Active Publication Date: 2012-10-10
LIMING RES INST OF CHEM IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process has the following disadvantages: the amount of catalyst used is large, after-treatment is required, the amount of double bonds lost during the polymerization process is large, and the relative molecular mass distribution of the obtained product is wide
[0006] Although allyl polyethers with different molecular weights can be synthesized by using DMC catalyst and allyl alcohol as the initiator, when the conventional batch process is used to synthesize polyethers with a molecular weight of 2000-6000, due to the fast reaction speed of the DMC catalyst, the alkylene oxide compound The local temperature rise caused by ring opening is more severe than that of ordinary KOH catalysts

Method used

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  • Preparation method of allyl polyether

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Experimental program
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Effect test

Embodiment 1

[0026] Add 116g of allyl alcohol (purity 99.5%, distilled before use) and 0.864g of catalyst A (the catalyst mass fraction based on the final product is 30×10) into a 3L autoclave -6 ), the temperature is increased to 90±1℃, and 180g of propylene oxide is continuously added slowly to induce the reaction; when the pressure in the kettle has dropped significantly and the catalyst has been activated, continue to add 304g of propylene oxide and maintain the pressure less than 0.15MPa during the feeding process At this time, the design molecular weight of allyl polyether in the reactor is 300; take out 550g allyl-propylene oxide oligomer, and continuously add 25.13g allyl alcohol / 1.32g polymerization stabilizer H / 2324.87 to the remaining 50g g Propylene oxide mixture, maintain the pressure below 0.15MPa during the feeding process, and stop feeding when the added reaction material reaches the designed amount. When the pressure in the kettle does not change significantly, the reaction ...

Embodiment 2

[0028] Catalyst B replaces catalyst A, and the rest is the same as in Example 1.

Embodiment 3

[0030] Catalyst C replaces Catalyst A, and the rest is the same as in Example 1.

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Abstract

The invention discloses a method for preparing allyl polyether, comprising the following steps: in the presence of bimetallic catalyst, using allyl alcohol as an initiator, adding a certain amount of epoxy alkane compound to synthesize small molecule allyl-epoxy alkane oligomer, then according to a certain proportion adding allyl alcohol, polymer stabilizer and epoxy alkane compound successively to synthesize large molecule allyl polyether. The method has the advantages of small mass fraction of catalyst in final product, short induction period of reaction, high double bond value of product, good appearance and the like.

Description

Technical field [0001] The invention relates to a preparation method of allyl polyether. Background technique [0002] Allyl polyether is a block / random copolymer formed by the reaction of allyl alcohol and alkylene oxide compounds (mainly ethylene oxide and propylene oxide). It is a synthetic polyether modified polysiloxane, silicon modified The main raw material of polyether. Polyether modified polysiloxane is water-soluble and oil-soluble; it not only has the excellent properties of traditional siloxane products, such as resistance to high and low temperature, anti-aging, hydrophobic, electrical insulation, low surface tension, etc., but also It has special properties such as lubrication, softness, spreadability and emulsification stability provided by the polyether segment. It can be used as a polyurethane foam stabilizer, textile auxiliaries, oil field demulsifiers, cosmetic additives, paint leveling agents, detergents, and defoamers Agent, emulsifier, etc. Copolymers for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/28
Inventor 贾利亚李新豪王文浩王建伟常伟林周集义张晓勤高宝柱张庆秋
Owner LIMING RES INST OF CHEM IND
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