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Water dispersible sulfonated polyester polyol and its preparing method

A technology of sulfonated polyester and polyol, applied in the field of sulfonated polyester polyol and its preparation, can solve the problems of unstable performance of water-based polyurethane and many reaction steps, and achieve the effect of superior dispersibility and broad application prospects.

Inactive Publication Date: 2005-08-03
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the domestic route for preparing water-based polyurethane is to react polyisocyanates with polyols, add 2.2-dimethylol propionic acid as an internal emulsifier to prepare prepolymers, and then add alkaline compounds for ionization to disperse in water. Due to the reaction steps Too much, resulting in unstable performance of the synthesized waterborne polyurethane

Method used

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  • Water dispersible sulfonated polyester polyol and its preparing method
  • Water dispersible sulfonated polyester polyol and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 4.5g of 1,4-butanediol, 10g of dimethyl isophthalate-5-sodium sulfonate and 0.0116g of tetrabutyl titanate into a three-necked flask equipped with a fractionation device, and conduct transesterification at 240°C. Then lower the temperature to 140°C, add 24.7g of adipic acid, 21.3g of 1,4-butanediol and 0.0184g of tetrabutyl titanate and zinc acetate mixture, reflux at 160°C for 2 hours, then change to a fractionating device, and separate the water for 2 hours. After 1 hour, blow nitrogen, keep warm at 160, 170, 180, 190, 210, and 220°C for 1 hour respectively, add 0.0184g tetrabutyl titanate equal to the second time and vacuumize at 220°C and 1KPa for 2 hours, Dropped to 140 ° C and discharged, the obtained white waxy solid was detected by nuclear magnetic infrared detection data as above, which proved to be the water-dispersible sulfonated polyester polyol of the present invention, wherein R=-CH 2 -CH 2 -CH 2 -CH 2 -, R'=-CH 2 -CH 2 -CH 2 -CH 2 -, relative m...

Embodiment 2

[0023] Add 9.2g of 1,4-butanediol, 10g of dimethyl isophthalate-5-sodium sulfonate and 0.01536g of tetrabutyl titanate into a three-necked flask equipped with a reflux device, and reflux at 180°C for 1 hour. Then lower the temperature to 80°C, add 49.3g of adipic acid, 45.6g of 1,4-butanediol and 0.0379g of tetrabutyl titanate, reflux at 160°C for 1 hour, then change to a fractionation device, separate the water for 2 hours, and pass nitrogen. Incubate at 160, 170, 180, 190, 210, and 220°C for 1 hour, add 0.0379g of tetrabutyl titanate and vacuum at 220°C and 1KPa for 2 hours, drop to 140°C and discharge to obtain a white wax The solid is detected by nuclear magnetic infrared detection data as above, which proves to be the water-dispersible sulfonated polyester polyol of the present invention, wherein R=-CH 2 -CH 2 -CH 2 -CH 2 -, R'=-CH 2 -CH 2 -CH 2 -CH 2 -, Mr=3000, m / n=10.

[0024] Take 1 part of the above product and place it in a three-necked flask, add 1.5 parts ...

Embodiment 3

[0026] Add 41.1g of triethylene glycol, 6g of dimethyl isophthalate-5-sodium sulfonate and 0.0377g of tetrabutyl titanate into a three-necked flask equipped with a reflux device, and perform transesterification at 200°C for 1 hour , then lowered the temperature to 110°C, added 47.4g of adipic acid and 0.0189g of tetrabutyl titanate, refluxed at 160°C for 2 hours, then changed to a fractionation device, separated water for 2 hours, and passed nitrogen, respectively at 160, 170, 180 , 190, 210, and 220°C for 1 hour, add 0.0189g of tetrabutyl titanate and vacuumize at 220°C and 1KPa for 1.5 hours, then drop to 140°C and discharge. , proved to be the water dispersible sulfonated polyester polyol of the present invention, wherein R=-CH 2 -CH 2 -0-CH 2 -CH 2 -0-CH 2 -CH 2 -, R'=-CH 2 -CH 2 -CH 2 -CH 2 -, Mr=5000, m / n=16.

[0027]Take 30g of the above product and 2.7g of isophorone diisocyanate in a three-necked flask, add dropwise a drop of dibutyltin dilaurate, react and ...

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Abstract

The present invention relates to a kind of water dispersible sulfonated polyester polyol and its preparation process. It is prepared through the ester exchange reaction between dimethyl isophthalate-5-sulfonate and diol to obtain sulfonated diol, and further esterifying dewatering reaction to obtain water dispersible sulfonated polyester polyol. Owing to the homogeneous block distribution of hydrophilic sulfonated groups in main polyester chain, the product has high dispersion in water, may find its wide application in water soluble environment protecting products and may be used directly in water soluble polyurethane paint, adhesive, etc.

Description

technical field [0001] The invention relates to a polyester polyol and a preparation method thereof, in particular to a water-dispersible sulfonated polyester polyol and a preparation method thereof. Background technique [0002] The special structure of polyurethane resin makes it have excellent chemical properties and unparalleled processing properties such as unique flexibility, wear resistance, low temperature resistance, adhesion, gloss and high cohesion and curing speed, making polyurethane products in many It has been widely used in the field, but at present, most of the polyurethane products used in the two aspects of coatings and adhesives in China are solvent-based, and the solvents volatilized by the products during use will directly endanger the health of workers and pollute the atmospheric environment . While vigorously developing the economy, maintaining a good environment and a healthy body are an important goal of today's social development. It is irreversib...

Claims

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Application Information

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IPC IPC(8): C08G63/672
Inventor 陈梁吕满庚
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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