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Polyester ether polylol and its preparing method

A technology of polyether ester polyol and polyester polyol, which is applied in the field of polyether ester polyol and its preparation, can solve the problems of low polymer molecular weight, poor polyurethane strength and tensile strength, and limited reaction speed, etc. The effect of low saturation, strong adhesion, good hydrolysis resistance and low temperature resistance

Inactive Publication Date: 2007-08-29
QINGDAO UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high temperature conditions and low polymerization activity in the esterification reaction that limit the reaction rate, the molecular weight of the prepared polymer is low, and it is also accompanied by side reactions such as decarboxylation and oxidation during the polycondensation process, resulting in chain termination and making the molecular weight Contains a certain amount of short-chain polyester and other by-products, and the resulting polyurethane has poor strength and tensile strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: a kind of polyether ester polyol. Its molecular structure is a polyester polyol derivative structure formed after the hydroxyl hydrogen in polyester polyol PDA1125 is replaced by polyoxypropylene ether alcohol. The molecular main chain structure of this derivative contains ester groups and ether bonds. The group or side group is hydroxyl, the average relative molecular weight is 1800, and the average hydroxyl functionality is 2.

Embodiment 2

[0040] Embodiment 2: a kind of preparation method of embodiment 1 polyether ester polyol, comprises the steps:

[0041] (1) In a pressure-resistant reactor with a volume of 225 ml, add 23 grams of polyester polyol PDA1125 and 0.23 grams of double metal cyanide complex catalyst DMC1, heat to 105±3°C, remove water and volatile groups in a vacuum After separation, the mixture was mixed for 5 minutes in an ultrasonic mixer with a frequency of 20 KHz and a power of 500 watts.

[0042] (2) Add 24 grams of propylene oxide into the pressure-resistant reaction kettle in (1) above at 110±3°C under nitrogen protection and stirring. After the reaction is complete, remove unreacted oxyalkylene to obtain the molecule The main chain structure contains ester groups and ether bonds, the terminal or side groups are hydroxyl groups, the average relative molecular weight is 1800, and the average hydroxyl functionality is 2 polyether ester polyols.

Embodiment 3

[0043] Embodiment 3: a kind of polyether ester polyol. Its molecular structure is a polyester polyol derivative structure formed after the hydroxyl hydrogen in polyester polyol PDA1125 is replaced by polyoxypropylene ether alcohol. The main chain structure of the derivative contains ester groups and ether bonds, terminal The group or side group is hydroxyl, the average relative molecular weight is 1800, and the average hydroxyl functionality is 2.

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PUM

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Abstract

The invention relates to a polyether ester polyhydric alcohol and the manufacturing method. The molecular main chain structure has ester group and ether linkage, and end radical or side radical is hydroxyl. And everage relative molecular weight is 500-9000, and average hydroxyl functionality is bwteen 1 and 4. The methdon includes the following steps: adding polyester polyhydric alcohol, bimetal cyanide complex compound catalyst into reaction kettle, heating to 60-130 degree centigrade, vaporizing to depriving water and other volatile constituents, taking mixture in ultrasonic mixer; adding part of oxyalkylene into the reaction kettle under condition of whisking, protecting by nitrogen gas and at 80-150 degree centigrade; depriving unreacted oxyalkylene to gain polyether ester polyhydric alcohol. The compound is mainly used to make polyurethane material.

Description

technical field [0001] The invention belongs to the technical field of polymer synthetic material polyether polyol, and more specifically relates to the innovation of a polyether ester polyol and a preparation method thereof. Background technique [0002] Polyurethane is the abbreviation of polyurethane, which is a polymer compound containing many repeated -NHCOO-groups in the main chain obtained by the reaction of oligomer polyols and polyisocyanates. Polyurethane has excellent properties such as wear resistance, oil resistance, tear resistance, radiation resistance, good adhesion with other materials, high elasticity and strong vibration absorption capacity. Polyurethane is widely used in many industrial and civil fields in the form of foam plastics, elastomers, adhesives, synthetic leather, waterproof materials and pavement materials. Polyurethane resins are usually synthesized by reacting polyol compounds with polyisocyanate compounds in the presence of catalysts, surfa...

Claims

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Application Information

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IPC IPC(8): C08G63/91C08G63/66C08G63/08C08G63/83
Inventor 郑嘉杰宁健王晓韩方煜顾尧
Owner QINGDAO UNIV OF SCI & TECH
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