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Preparation method of high solid content biodegradable waterborne polyurethane

A water-based polyurethane and biodegradable technology, which is applied in the field of preparation of high-solid biodegradable water-based polyurethane, can solve problems such as mechanical properties, low water resistance and solvent resistance, and slow drying speed

Active Publication Date: 2019-04-02
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Compared with solvent-based polyurethane, traditional water-based polyurethane has lower mechanical properties, water resistance, solvent resistance, and slower drying speed

Method used

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  • Preparation method of high solid content biodegradable waterborne polyurethane
  • Preparation method of high solid content biodegradable waterborne polyurethane
  • Preparation method of high solid content biodegradable waterborne polyurethane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1 A kind of preparation method of high solid biodegradable waterborne polyurethane, steps and conditions are as follows:

[0022] Polyethylene glycol 8.8%, isophorone diisocyanate 32.5% (12.5% ​​in prepolymer A; 20% in prepolymer B), polycaprolactone diol 50.1%, dimethylol Propionic acid 2.0 % (0.8 % in prepolymer A; 1.2 % in prepolymer B), 1,4-butanediol 2.5 %, triethylamine 1.5 %, 2-[(2-aminoethyl base) amino] ethanesulfonate sodium 2.5%.

[0023] The specific addition amount is as follows: the molecular weight of polyethylene glycol is 200, and the mass is 7 g; isophorone diisocyanate, the mass is 26 g (the amount used in prepolymer A is 10 g; the amount used in prepolymer B is 16 g); Polycaprolactone diol has a molecular weight of 2000 and a mass of 40 g; dimethylolpropionic acid has a mass of 1.6 g (the amount used in prepolymer A is 0.6 g; the amount used in prepolymer B is 1.0 g); 1, 2 g of 4-butanediol, the neutralizing agent is triethylamine, the m...

Embodiment 2

[0029] Embodiment 2 A kind of preparation method of high solid biodegradable waterborne polyurethane, steps and conditions are as follows:

[0030] A kind of material and mass percent of high solid biodegradable waterborne polyurethane are as follows:

[0031] Polyethylene glycol 15.5%, isophorone diisocyanate 30.1% (11.6% in prepolymer A; 18.5% in prepolymer B), polycaprolactone diol 46.5%, dimethylol Propionic acid 1.9 % (0.7 % in prepolymer A; 1.2 % in prepolymer B), 1,4-butanediol 2.3 %, triethylamine 1.4 %, 2-[(2-aminoethyl base) amino] ethanesulfonate sodium 2.3%.

[0032] The specific addition amount is as follows: the molecular weight of polyethylene glycol is 400, and the quality is 13.3 g; isophorone diisocyanate, the quality is 26 g (the amount in prepolymer A is 10 g; ); polycaprolactone diol molecular weight is 2000, quality 40 g; dimethylol propionic acid, quality 1.6 g (the amount in prepolymer A is 0.6 g; the amount in prepolymer B is 1.0 g); 2 g of 1,4-buta...

Embodiment 3

[0038] Embodiment 3 A kind of preparation method of high solid biodegradable waterborne polyurethane, steps and conditions are as follows:

[0039] Polyethylene glycol 32.4%, isophorone diisocyanate 24.1% (9.3% in prepolymer A; 14.8% in prepolymer B), polycaprolactone diol 37.1%, dimethylol Propionic acid 1.5 % (0.6 % in prepolymer A; 0.9 % in prepolymer B), 1,4-butanediol 1.9 %, triethylamine 1.1 %, 2-[(2-aminoethyl )amino]ethanesulfonate sodium 1.9%.

[0040] The specific addition amount is as follows: the molecular weight of polyethylene glycol is 1000, and the quality is 35 g; isophorone diisocyanate, the quality is 26 g (the amount used in prepolymer A is 10 g; ); polycaprolactone diol molecular weight is 2000, quality 40 g; dimethylol propionic acid, quality 1.6 g (the amount in prepolymer A is 0.6 g; the amount in prepolymer B is 1.0 g); 2 g of 1,4-butanediol, the neutralizing agent is triethylamine, mass 1.2 g; sodium 2-[(2-aminoethyl)amino]ethanesulfonate, mass 2 g....

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Abstract

The invention provides a preparation method of high solid content biodegradable waterborne polyurethane, which includes: 1) performing a reaction on polyethylene glycol, dimethylolpropionic acid and isophorone diisocyanate to prepare a hydrophilic polyurethane prepolymer A; 2) performing a reaction on polycaprolactone diol, dimethylolpropionic acid, micromolecular dihydric alcohol and isophorone diisocyanate, and adding the prepolymer A to the reaction system and continuously performing the reaction to prepare a polyurethane prepolymer B; 3) adding a certain amount of deionized water to the prepolymer B for high speed dispersion and dropping a chain extender sodium 2-[(2-aminoethyl)amino]ethanesulfonate water solution, thus finally producing the high solid content biodegradable waterbornepolyurethane. By means of synergistic effect of the ionic hydrophilic monomer and nonionic hydrophilic monomer, the high solid content biodegradable waterborne polyurethane is prepared, wherein solidcontent can reach 52-55%; the product has good emulsion stability and excellent biodegradability.

Description

technical field [0001] The invention relates to a preparation method of high-solid biodegradable waterborne polyurethane. Background technique [0002] Compared with solvent-based polyurethane, traditional water-based polyurethane has lower mechanical properties, water resistance, solvent resistance, and slower drying speed. This is mainly because some waterborne polyurethanes have a linear structure and contain a certain amount of hydrophilic groups in their skeleton. Usually this type of water-based polyurethane prepolymer has a high viscosity, and a large amount of water needs to be added during dispersion, so the solid content of the obtained water-based polyurethane dispersion is low, generally lower than 40%. Waterborne polyurethane has high solid content and low viscosity, which means fast drying speed and low energy consumption, which can reduce production costs and transportation costs. [0003] Nowadays, due to environmental and safety issues, people's demand for...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/12C08G18/32C08G18/34C08G18/40C08G18/42C08G18/48
CPCC08G18/12C08G18/3206C08G18/348C08G18/4018C08G18/4277C08G18/4833C08G18/6625C08G2230/00C08G18/3857
Inventor 杨智慧吴广峰刘雪雁臧虎马剑英
Owner CHANGCHUN UNIV OF TECH