Biomass-resource-modified water-based polyurethane emulsion and preparation method thereof

A technology of water-based polyurethane and biomass resources, applied in the field of polymer chemistry, can solve the problems of poor solvent resistance and mechanical properties, achieve the effects of low price, wide application space, and improved comprehensive performance

Inactive Publication Date: 2016-09-07
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the existing water-based polyurethane water resistance, solvent resistance and poor mechanical properties, to provide a low-cost, simple process, environmentally friendly and biodegradable biomass resource modified water-based polyurethane emulsion preparation method

Method used

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  • Biomass-resource-modified water-based polyurethane emulsion and preparation method thereof
  • Biomass-resource-modified water-based polyurethane emulsion and preparation method thereof
  • Biomass-resource-modified water-based polyurethane emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1, a kind of biomass resource modified aqueous polyurethane emulsion, is made by following method:

[0024] 1) Firstly, polycaprolactone, isophorone diisocyanate and dimethylolbutyric acid are added to a dry reactor to carry out polymerization isophorone reaction at 70°C, in which isophorone diisocyanate and polycaprolactone The mass ratio of ester is 0.74:1, the mass ratio of isophorone diisocyanate to dimethylol butyric acid is 5.67:1; the reaction time is 4h;

[0025] 2) Add chain extender 1,4-butanediol to the reactor at 65°C for 3 hours, wherein the mass ratio of 1,4-butanediol to polycaprolactone is 0.051:1;

[0026] 3) Cool down to 20°C, add triethylamine to adjust the pH value of the reaction system to 7, and the reaction time is 2.5h;

[0027] 4) Under high-speed stirring, add an aqueous solution of tannic acid with a mass concentration of 0.89% into the reactor and react at 45°C for 2.5 hours. The mass ratio of isophorone diisocyanate to tannic aci...

Embodiment 2

[0028] Embodiment 2, a kind of biomass resource modified aqueous polyurethane emulsion, is made by following method:

[0029] 1) First, add polytetrahydrofuran ether diol, hexamethylene diisocyanate, and dimethylol propionic acid into a dry reactor for polymerization at 75°C, in which hexamethylene diisocyanate and polytetrahydrofuran ether binary The mass ratio of alcohol is 0.67:1, the mass ratio of hexamethylene diisocyanate to dimethylol propionic acid is 5.27:1; the reaction time is 3h;

[0030] 2) Add chain extender 1,4-butanediol to the reactor at 70°C for 2 hours, wherein the mass ratio of 1,4-butanediol to polytetrahydrofuran ether diol is 0.027:1;

[0031] 3) Cool down to 25°C, add trimethylamine to adjust the pH value of the reaction system to 7.5, and the reaction time is 2h;

[0032] 4) Under high-speed stirring, add an aqueous solution of tannic acid with a mass concentration of 0.6% into the reactor and react at 30°C for 5 hours. The mass ratio of hexamethylene...

Embodiment 3

[0033] Embodiment 3, a kind of biomass resource modified aqueous polyurethane emulsion, is made by following method:

[0034] 1) First, polyoxypropylene diol, toluene diisocyanate, and sodium 1,2-dihydroxy-3-propanesulfonate are added to a dry reactor for polymerization at 80°C, in which toluene diisocyanate and polyoxypropylene diol The mass ratio of toluene diisocyanate to 1,2-dihydroxy-3-propanesulfonate is 2.9:1; the reaction time is 2h;

[0035] 2) Add chain extender 1,4-butanediol to the reactor at 60°C for 4 hours, wherein the mass ratio of 1,4-butanediol to polyoxypropylene glycol is 0.063:1;

[0036] 3) Cool down to 15°C, add triethanolamine to adjust the pH of the reaction system to 7.5, and the reaction time is 3 hours;

[0037] 4) Under high-speed stirring, add an aqueous solution of tannic acid with a mass concentration of 0.36% into the reactor and react at 40°C for 3 hours. The mass ratio of toluene diisocyanate to tannic acid is 11.77:1, and a product is obtai...

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Abstract

The invention relates to a preparation method of a biomass-resource-modified water-based polyurethane emulsion. The preparation method comprises the following steps: adding polyglycol, diisocyanate and a hydrophilic chain extender into a dry reactor, and carrying out polymerization reaction to prepare a polyurethane prepolymer; adding a chain extender 1,4-butanediol, carrying out reaction for some time, cooling, and adding a pH regulator to regulate the pH value of the reaction system; and adding a tannic acid water solution while stirring, and carrying out reaction and emulsification to obtain the biomass-resource-modified water-based polyurethane emulsion. By using the biomass resource to modify the water-based polyurethane, the product has the characteristics of favorable comprehensive properties, environment friendliness, no toxicity or harm, high transportation safety and the like, is biodegradable, and belongs to an environment-friendly polyurethane product. The biomass-resource-modified water-based polyurethane can overcome the defects of low room curing speed, poor water resistance, poor mechanical properties and the like in the traditional water-based polyurethane.

Description

technical field [0001] The invention belongs to the field of polymer chemistry, and in particular relates to a biomass resource modified water-based polyurethane emulsion and a preparation method thereof. Background technique [0002] With the improvement of the quality of human life, environmental protection regulations are becoming more and more stringent. Various environmental protection regulations have strict restrictions on the emission of volatile organic compounds (VOC) and the content of harmful solvents. Therefore, it is produced from more environmentally friendly biomass raw materials. Water-based polyurethane products will become one of the main development directions of conformity development. And water-based polyurethane uses water as the dispersion medium, which has the advantages of low toxicity, non-combustibility, no pollution to the environment, energy saving, safety and reliability, etc., so it has been widely used in the fields of coatings, adhesives, fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/34C08G18/08C08G18/12C08G18/32
CPCC08G18/12C08G18/0823C08G18/348C08G18/6659C08G18/6692C08G18/3206
Inventor 赖小娟胡早霞王露熹任庆海
Owner SHAANXI UNIV OF SCI & TECH
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