Unlock instant, AI-driven research and patent intelligence for your innovation.

Environmentally friendly fluorescent water-based polyurethane and preparation method thereof

A water-based polyurethane and environment-friendly technology, applied in the field of environment-friendly fluorescent water-based polyurethane and its preparation, can solve the problems of uneven distribution of chromophoric groups, easy fading, poor compatibility, etc., achieving not easy fading and wide application Foreground effect

Inactive Publication Date: 2017-01-25
WEIFANG ZHONGXING FINE CHEM +1
View PDF7 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Fluorescent small molecules often have defects such as poor compatibility with the matrix, easy fading, easy migration of dyes, insufficient color fastness, uneven distribution of chromophoric groups, insufficient bright colors, and easy elution during use. Polymer research has gradually become a hot field

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Environmentally friendly fluorescent water-based polyurethane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] The preparation method of the environment-friendly fluorescent water-based polyurethane related to the present invention comprises the following steps:

[0023] Step 1: Add 80~100mmol of diisocyanate compound, 24~36mmol of oligomer diol, 0.5~2mmol of dibutyltin dilaurate, and 2~10mmol of small molecule diol chain extender into a thermometer, agitator, In a three-neck flask with a glass bottle stopper, mix well, react at 20°C for 20 minutes, raise the temperature to 60-70°C for 1-2 hours, and obtain a polyurethane prepolymer;

[0024] Step 2: 30~40mmol of short-chain aliphatic diol chain extender containing hydrophilic groups, heat up to 70~80°C for 2~4h, and then add 2~10mmol of salicyl fluorone as a crosslinking agent Continue to react for 1~3h;

[0025] Step 3: Cool the product obtained in Step 2 to 40-60°C, add triethylamine in an equimolar ratio to the short-chain aliphatic diol chain extender containing hydrophilic groups, and neutralize for 30-60 minutes;

[002...

Embodiment 1

[0032] Step 1: Add 80mmol of isophorone diisocyanate, 24mmol of polyoxypropylene diol, 0.5mmol of dibutyltin dilaurate, and 10mmol of 1,4 butanediol into a three-necked flask equipped with a thermometer, a stirrer, and a glass stopper, Mix evenly, react at 20°C for 20 minutes and raise the temperature to 60°C for 1 hour to prepare a polyurethane prepolymer.

[0033] Step 2: Add 30 mmol of dimethylolpropionic acid to the system in step 1, raise the temperature to 70° C. for chain extension reaction for 2 h, and then add 2 mmol of salicylfluorescein as a cross-linking agent to continue the reaction for 1 h.

[0034] Step 3: Cool the product obtained in Step 2 to 40°C, add triethylamine in an equimolar ratio to dimethylol propionic acid for neutralization for 30 minutes

[0035] Step 4: Under high-speed shearing force, add distilled water 3 times the total mass of monomers to the product obtained in Step 3 and emulsify for 30 minutes. After the reaction, an environmentally friend...

Embodiment 2

[0037] The embodiment of the present invention provides a kind of preparation method of environment-friendly fluorescent aqueous polyurethane retanning agent, and this method comprises the following steps in sequence:

[0038] Step 1: Add 100mmol of toluene diisocyanate, 36mmol of polycarbonate diol, 1mmol of dibutyltin dilaurate, and 2mmol of 1,5 pentanediol into a three-necked flask equipped with a thermometer, a stirrer, and a glass bottle stopper, and mix well. Reaction at ℃ for 20 minutes and raised to 70 ℃ for 2 hours to prepare polyurethane prepolymer.

[0039] Step 2: Add 30 mmol of dimethylolbutyric acid to the system of step 1, raise the temperature to 70°C for chain extension reaction for 3 hours, and then add 10 mmol of salicyl fluorone as a cross-linking agent to continue the reaction for 2 hours.

[0040] Step 3: Cool down the temperature of the product obtained in Step 2 to 50° C., and add triethylamine in an equimolar ratio to dimethylol butyric acid for neutra...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to environmentally friendly fluorescent water-based polyurethane and a preparation method thereof. In a using process, fluorescent micro-molecules have shortcomings that the fluorescent micro-molecules cannot be compatible with a matrix well, color fading is easy, dyestuff is easy to migrate, color fastness is insufficient, chromophoric groups are unevenly distributed, color is not bright enough, and is easy to remove when washed, and the like. The preparation method comprises the following steps: reacting a diisocyanate compound, oligomer glycol, dibutyltin dilaurate and a micromolecule glycol chain extender in a mixed manner, and heating and reacting to obtain a prepolymer; adding a short chain aliphatic glycol chain extender containing a hydrophilic group, heating and carrying out chain extension reaction, adding salicyl fluorone used as a crosslinking agent and continuing reacting; and cooling, adding triethylamine for neutralizing, and adding distilled water for emulsifying to obtain the environmentally friendly fluorescent water-based polyurethane emulsion of which the solid content is 14-33%. The salicyl fluorone is used as the crosslinking agent, a waterborne polyurethane molecular chain is introduced by a chemical bonding mode, and various problems caused by preparation of fluorescence type waterborne polyurethane by a blending method are solved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to an environment-friendly fluorescent water-based polyurethane and a preparation method thereof. Background technique [0002] Fluorescent small molecules often have defects such as poor compatibility with the matrix, easy fading, easy migration of dyes, insufficient color fastness, uneven distribution of chromophoric groups, insufficient bright colors, and easy elution during use. Polymer research has gradually become a hot field. [0003] Water-based polyurethane conforms to the "three prerequisites" (resources, energy, and pollution-free) and "four E principles" (economic ECONOMY, efficiency EFFICIENCY, ecological ECOLOGY, energy ENERGY) of industrial development. In recent years, it has been used in coatings, adhesives, and fabric finishing agents have been widely used. The introduction of fluorescent small molecules into water-based polyurethane by chemical bonding...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/69C08G18/08C08G18/12C08G18/32C08G18/42C08G18/44C08G18/48C08G18/34
CPCC08G18/12C08G18/0823C08G18/3206C08G18/4277C08G18/44C08G18/4825C08G18/6659C08G18/6692C08G18/698
Inventor 邢政国李小宁韩咪咪强涛涛
Owner WEIFANG ZHONGXING FINE CHEM