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Synthesis method of polyether polyol or monohydric alcohol

A technology of polyether polyol and synthesis method, which is applied in the field of organic synthesis, can solve problems such as high production cost, complicated preparation process, and long production cycle, and achieve the effects of high yield, high catalytic activity, and improved catalytic activity

Pending Publication Date: 2021-06-25
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the hydrophilicity of the polyoxyethylene ether obtained by the ring-opening reaction of ethylene oxide, the hydrophobicity of the corresponding polyether polyol is reduced, thereby reducing the moisture resistance and various other physical properties of the polyurethane obtained.
Another literature reports a method for preparing high-primary hydroxyl polyether polyols, but the preparation process of this method is complicated and the preparation process is cumbersome, and there is still room for improvement
[0003] With the currently used catalysts, it may not be possible to achieve a high proportion of terminal primary hydroxyl groups in polyether polyols, or the production cycle is long and the production cost is high, which cannot meet the requirements of industrial production.

Method used

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  • Synthesis method of polyether polyol or monohydric alcohol
  • Synthesis method of polyether polyol or monohydric alcohol

Examples

Experimental program
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Effect test

Embodiment 1

[0032] 100.4 grams of propylene glycol-propylene oxide adduct (PPG-1000, weight average molecular weight is about 1000) and 0.02 grams of catalyst A1 [1,2-(C 10 f 7 ) 2 BC 6 f 4 B(C 10 f 7 ) 2 ]. After replacing the air in the kettle with nitrogen, dehydrate at 100°C for two hours under reduced pressure, and then add 200.5 grams of propylene oxide dropwise at a reaction temperature of 70-100°C to keep the reaction pressure not exceeding 3 atmospheres, and the reaction takes about 5 hours. After the polymerization was completed, it was neutralized with an aqueous sodium hydroxide solution. 3.0 g of synthetic diatomaceous earth and water were added, and the mixture was treated at 100°C for 3 hours. The mixture is taken out from the autoclave, filtered, and dehydrated to obtain 298.3 grams of liquid polyoxypropylene propylene glycol addition product D1. Based on the weight of the propylene glycol-propylene oxide addition product and propylene oxide that is dropped into, t...

Embodiment 2

[0034] Except that the catalyst is changed to A2〔1,4-(C 10 f 7 ) 2 BC 6 f 4 B(C 10 f 7 ) 2 ] Outside, other experimental conditions are identical with embodiment 1, can obtain 295.3 grams of liquid polyoxypropylene propylene glycol ring-opening polymer D2, productive rate is about 98.2%, Mw=3059, Mw / Mn=1.32, terminal primary hydroxylation rate 91%.

Embodiment 3

[0036] Except that the catalyst is changed to A3, other experimental conditions are the same as in Example 1, and 280.3 grams of liquid polyoxypropylene propylene glycol ring-opening polymer D3 can be obtained, with a yield of about 93.3%, Mw=2850, Mw / Mn=1.42, and the end The primary hydroxylation rate is 83%.

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Abstract

The invention belongs to the technical field of organic synthesis, and particularly relates to a synthesis method of polyether polyol or monohydric alcohol. In the presence of a binuclear compound represented by formula (I), an active hydrogen-containing compound reacts with a heterocyclic compound to prepare the polyether polyol or monohydric alcohol, and the formula(I) isX2Lm, wherein X is a boron atom or a chlorine atom. L is one or more of a fluorine atom substituted naphthalene ring, a fluorine atom substituted benzene ring and a fluorine atom substituted polycyclic aryl group, and m is an integer of 1-6. According to the preparation method disclosed by the invention, the polyether polyol or monohydric alcohol with very high terminal primary hydroxylation rate can be prepared, and the catalyst has better reaction activity, so that the polyether polyol or monohydric alcohol can be applied to many fields, such as polymer polyether, polyurethane resin, polyurethane prepolymer, polyurethane elastomer, epoxy resin, acrylic resin, polyester resin, various anionic surfactants and the like.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, in particular to a synthesis method of polyether polyol or monohydric alcohol. Background technique [0002] Polyether polyols can be prepared by the ring-opening reaction of oxyalkylenes and compounds containing active hydrogen. Such polyether polyols are widely used as raw materials for thermosetting resins such as polyurethanes, and can also be used in surfactants, lubricants, and other fields. get applied. At present, the main preparation method of polyether polyol is the ring-opening polymerization of alkylene oxide in the presence of an alkali catalyst. Alkali metal compounds used as alkali catalysts mainly include sodium hydroxide and potassium hydroxide. Another approach involves the ring-opening polymerization of alkylene oxides using zinc hexacyanocobaltate or similar double metal cyanide complexes as catalysts. However, most of the products synthesized under the action of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28
CPCC08G65/2654C08G65/2609
Inventor 朱宏吴锶敏彭泽航马琳媛蓝宛榕梁泳彤李锐恒乔小瑜刘欣李昌盛
Owner SOUTH CHINA NORMAL UNIVERSITY