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High-functionality polyester polyol and preparation method thereof

A polyester polyol, high-functionality technology, applied in the field of polyester polyol, can solve problems affecting product performance, product quality, hard foam crisping, etc., and achieve good aging resistance

Inactive Publication Date: 2010-10-06
CHANGZHOU KANGHONG DECORATION MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the residue is a complex mixture, which contains a lot of monoacids, which affects the performance of the product, the hard foam produced by it has bad properties such as crispness and shrinkage, which seriously affects the quality of the product.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] High-functionality polyester polyol is made from the following raw materials in parts by weight: 400 parts of PTA oxidation residue, 200 parts of glycerol, 100 parts of diethylene glycol, 20 parts of pentaerythritol, 80 parts of oleic acid, tetrabutyl titanate 1.5 parts of ester. The preparation method comprises the following process steps: extracting each raw material according to the ratio of the above raw materials, feeding each raw material into a reaction kettle, heating and raising the temperature, starting to stir after each raw material is melted, and feeding nitrogen gas. When the temperature in the reactor reaches 145-165°C, the water in each raw material begins to be evaporated, continue heating to make the temperature in the reactor reach 175-215°C, keep this temperature for 9-11 hours, so that the water in each raw material All the water was evaporated from the reactor. After the moisture content in each raw material is distilled off, continue to keep abov...

Embodiment 2

[0020] High-functionality polyester polyol is made from the following raw materials in parts by weight: 450 parts of PTA oxidation residue, 210 parts of glycerol, 120 parts of diethylene glycol, 25 parts of pentaerythritol, 70 parts of oleic acid, 2 stannous octoate share. Its preparation method is identical with embodiment 1.

Embodiment 3

[0022] High-functionality polyester polyol is made from the following raw materials in parts by weight: 420 parts of PTA oxidation residue, 190 parts of glycerol, 95 parts of diethylene glycol, 22 parts of pentaerythritol, 65 parts of oleic acid, dilauric acid 1.2 parts of dibutyltin. Its preparation method is identical with embodiment 1.

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Abstract

The invention relates to high-functionality polyester polyol and a preparation method thereof. The polyol is prepared from 400-450 parts of PTA oxidation residue, 180-210 parts of glycerol, 80-140 parts of diglycol, 20-30 parts of pentaerythritol, 50-90 parts of oleic acid and 1-2 parts of catalyst. The preparation method comprises the following steps of: extracting various raw materials according to the proportion, sending the raw materials into a reaction kettle, heating, stirring and introducing nitrogen gas; evaporating all water of the raw materials in the kettle; cooling after evaporating all water, and stopping the introduction of nitrogen gas; heating and vacuumizing the kettle to form high temperature and high vacuum; polymerizing all raw materials at high temperature and in high vacuum, and greatly increasing the molecular weight of polyester; and discharging to obtain the finished product after various indexes of the molecular weight of polyester are measured to reach specified values. The high-functionality polyester polyol has the advantages of high wear resistance, strength, stability, heat resistance, aging resistance and the like.

Description

technical field [0001] The invention relates to the technical field of polyester polyols, in particular to high-functionality polyester polyols and a preparation method thereof. Background technique [0002] Polyurethane resin has the characteristics of foamability, elasticity, wear resistance, adhesion, low temperature resistance, solvent resistance and biological aging resistance, so it has a wide range of uses. It is a rapidly developing polymer synthetic material. The polyurethane industry has formed a relatively large scale of production. [0003] my country's polyurethane industry started in the late 1950s and has a history of more than 50 years. As one of the main raw materials of polyurethane, the domestic demand for polyester polyol is also expanding. In recent years, polyester polyols have been produced domestically using PTA residues and PTA oxidation residues as raw materials. It has been affirmed and praised by the majority of users for its low price and super...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/672C08G63/20C08G63/78C08G18/42
Inventor 吴永存芮敏军
Owner CHANGZHOU KANGHONG DECORATION MATERIAL
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