Unlock instant, AI-driven research and patent intelligence for your innovation.

Polyether glycol or polyether monohydric alcohol preparation method

A technology for polyether polyols and monohydric alcohols, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., capable of solving the hydrophobicity of polyether polyols or monohydric alcohols Reduce, unable to reach a high proportion of terminal primary hydroxyl groups, reduce moisture resistance of polyurethane and various other physical properties and other issues

Inactive Publication Date: 2011-04-27
SOUTH CHINA NORMAL UNIVERSITY
View PDF0 Cites 1 Cited by
  • 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 or monohydric alcohol is reduced, thereby reducing the moisture resistance and various other properties of the polyurethane obtained. physical properties
[0003] The currently used catalysts cannot achieve a very high proportion of terminal primary hydroxyl groups in polyether polyols or monohydric alcohols, and cannot meet the requirements of industrial production of high-performance polyurethane materials. Therefore, it is urgent to develop a method that can more effectively increase the terminal primary hydroxyl groups. The new catalyst system, the active center atom of the catalyst used in the past is only a single atom, that is, a mononuclear atom compound

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polyether glycol or polyether monohydric alcohol preparation method
  • Polyether glycol or polyether monohydric alcohol preparation method
  • Polyether glycol or polyether monohydric alcohol preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Add 100.4 grams of propylene glycol-propylene oxide adduct (PPG-1000, weight average molecular weight is about 1000, provided by Jiangsu Haian Petrochemical Company) in a 500 ml autoclave (produced by Weihai Automatic Control Company) equipped with agitator and temperature control device And 0.02 grams of catalyst A1 [1,2-(C 6 f 5 ) 2 BC 6 f 4 B(C 6 f 5 ) 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 ...

Embodiment 2

[0064] Except that the catalyst is changed to A2 [1,4-(C 6 f 5 ) 2 BC 6 f 4 B(C 6 f 5 ) 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

[0066] 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%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a polyether glycol or polyether monohydric alcohol preparation method and the method is characterized in that a compound with active hydrogen and a heterocyclic compound are reacted to prepare polyether glycol or polyether monohydric alcohol in the present of a dinuclear compound which has the characteristic in an expression (1), X2Lm... (1), in the expression (1), X is boron atom or aluminum atom, L is one or more of substituted aryl group with fluorine atoms, substituted aryl group with the substituted aryl group with fluorine atoms or substituted polycyclic aryl group with fluorine atoms and m is an integer from 1-6. By adopting the preparation method of the invention, polyether glycol or polyether monohydric alcohol with high hydroxylation of terminal primary hydroxyl group can be prepared; because the catalyst has better reactivity, the product can be used in many fields such as polymer polyether, polyurethane resin, polyurethane prepolymer, polyurethane elastomer, epoxy resin, acrylic resin, polyester resin, various anionic surfactant and the like.

Description

technical field [0001] The present invention relates to the ring-opening polymerization of heterocyclic compounds and a method for preparing ring-opening polymerization products; it relates to the implementation of ring-opening polymerization of heterocyclic compounds in the presence of a specific catalyst; specifically, it is a function that the proportion of terminal primary hydroxyl groups is not less than 70%. The preparation method of permanent polyether polyol or monohydric alcohol. Background technique [0002] Polyether polyols or monohydric alcohols can be prepared by the ring-opening reaction of oxyalkylenes and compounds containing active hydrogen. Such polyether polyols or monohydric alcohols are widely used as raw materials for thermosetting resins such as polyurethanes, and can also be used in surfactants, Lubricants and applications in other fields. At present, the main preparation method of polyether polyols or monohydric alcohols is the ring-opening polymer...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/26C08G65/28C08G85/00B01J31/14
Inventor 朱宏
Owner SOUTH CHINA NORMAL UNIVERSITY