High-light-transmission and high-solid-content waterborne polyurethane and preparation method thereof

A light-transmitting and water-containing technology is applied in the field of preparation of water-based polyurethane resins, which can solve the problems of not being able to have high light-transmitting properties, and that synthetic surface leather brighteners cannot be used, and achieve the effect of improving light-transmitting properties.

Active Publication Date: 2016-02-24
SHANGHAI LANOU CHEM IND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among them, the patent CN104262572A describes a high-solid water-based polyurethane resin, which uses polyester polyols with sodium sulfonate groups, carboxylic acids containing dihydroxyl groups, aliphatic diisocyanates, mixed polyols, small molecule diols, etc. However, the above-mentioned patents are mostly used for printing glue, which cannot have high light transmission, and cannot be used as a brightener for synthetic surface leather, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 has the high solid aqueous polyurethane resin of high light transmittance

[0030] selected

[0031] 20 parts of polycaprolactone diol (Mn=1000), 20 parts of polytetrahydrofuran ether diol (Mn=1000), 70-80 parts of acetone; 5 parts of ethylene glycol; 25 parts of isophorone diisocyanate; 95 parts of water; 5 parts of sulfonated polyethylene glycol; 0.8 parts of ethylenediamine, 0.15 parts of organic bismuth.

[0032] The preparation method is as follows:

[0033] 1) Vacuum dehydration of polycaprolactone diol, polytetrahydrofuran ether diol and sulfonated polyethylene glycol at 128-132°C for 1-2 hours;

[0034] 2) Cool down to 68-72°C, add 10 parts of acetone, isophorone diisocyanate, and organic bismuth, stir and raise the temperature to 78-82°C, keep warm for 1-1.5 hours, add ethylene glycol, and continue the keep warm reaction for 2- 3h, until the NCO value reaches the theoretical value;

[0035] 3) add remaining acetone to dilute and cool to 40 degr...

Embodiment 2

[0039] Embodiment 2 has the high solid aqueous polyurethane resin of high light transmittance

[0040] 26 parts of polycaprolactone diol (Mn=2000), 26 parts of polytetrahydrofuran ether diol (Mn=3000), 70-80 parts of acetone; 8 parts of propylene glycol; 30 parts of isophorone diisocyanate; 100 parts of water 5.1 parts of sulfonated polyethylene glycol; 1 part of isophorone diamine, 0.2 parts of organic bismuth. The preparation method is as follows:

[0041] 1) Vacuum dehydration of polycaprolactone diol, polytetrahydrofuran ether diol and sulfonated polyethylene glycol at 128-132°C for 1-2 hours;

[0042] 2) Cool down to 68-72°C, add 10 parts of acetone, isophorone diisocyanate, and organic bismuth, stir and raise the temperature to 78-82°C, keep warm for 1-1.5h, add propylene glycol, and continue the warm-up reaction for 2-3h, Until the NCO value reaches the theoretical value;

[0043] 3) add remaining acetone to dilute and cool to 40 degrees Celsius, add water to emulsif...

Embodiment 3

[0047] Embodiment 3 has the high solid aqueous polyurethane resin of high light transmittance

[0048] 30 parts of polycaprolactone diol (Mn=1000), 30 parts of polytetrahydrofuran ether diol (Mn=2000), 70-80 parts of acetone; 10 parts of hexanediol; 35 parts of isophorone diisocyanate; 105 parts of water; 4.5 parts of sulfonated polyethylene glycol; 1.2 parts of isophorone diamine, 0.25 parts of organic bismuth.

[0049] The preparation method is as follows:

[0050] 1) Vacuum dehydration of polycaprolactone diol, polytetrahydrofuran ether diol and sulfonated polyethylene glycol at 128-132°C for 1-2 hours;

[0051] 2) Cool down to 68-72°C, add 10 parts of acetone, isophorone diisocyanate, and organic bismuth, stir and raise the temperature to 78-82°C, keep warm for 1-1.5 hours, add hexanediol, and continue the keep warm reaction for 2- 3h, until the NCO value reaches the theoretical value;

[0052] 3) add remaining acetone to dilute and cool to 40 degrees Celsius, add water...

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PUM

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Abstract

The invention provides high-light-transmission and high-solid-content waterborne polyurethane. The high-light-transmission and high-solid-content waterborne polyurethane is obtained by reaction of the following ingredients: polycaprolaclone glycol, polytetramethylene ether glycol, a solvent, diisocyanate, sulfonated polyethyleneglycol and diamine, wherein polycaprolaclone glycol is selected from polycaprolaclone glycol with the molecular weight of 1,000-3,000 or the combination; polytetramethylene ether glycol is selected from polytetramethylene ether glycol with the molecular weight of 1,000-3,000 or the combination.

Description

technical field [0001] The invention relates to the field of preparation of water-based polyurethane resin, in particular to a preparation method of high-solid water-based polyurethane with high light transmittance. Background technique [0002] Water-based resins are very common for fabric printing. Its principle is to use resin to fix pigments or fillers on the surface of fabrics to achieve coloring. With the improvement of people's awareness of environmental protection and the continuous introduction of environmental protection regulations, printing glue is developing in the direction of environmental protection and high performance. It can effectively make up for the defects of water-based acrylic esters, and is the development direction of high-end printing adhesives. [0003] Due to its strong toughness and good anti-adhesive properties, water-based polyurethane can be used for water-based varnish and synthetic surface leather brightener. Wherein the patent CN1034088...

Claims

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Application Information

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IPC IPC(8): C08G18/42C08G18/48C08G18/50C08G18/66
CPCC08G18/4277C08G18/4808C08G18/4854C08G18/5072C08G18/664C08G18/6674
Inventor 陈正林林曦李天佑
Owner SHANGHAI LANOU CHEM IND TECH
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