Color-photosensitive aqueous polyurethane emulsion for textiles and preparation method thereof

A water-based polyurethane, photochromic technology, used in textiles, papermaking, fiber processing, etc., can solve problems such as inability to be widely used and unstable performance of photosensitive substances

Active Publication Date: 2011-09-28
ZHEJIANG LUOXING IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are two main methods in terms of photochromic change: one is to use optical principles to design the film structure. And can not be widely used; the second is to add photosensitive substances, although this method is simple, but the performance is unstable due to the migration of the added photosensitive substances

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] First add 50g of polytetrahydrofuran polyol (PTMG-2000), 20g of polycaprolactone polyol (PCL-220N), and 30g of polyether polyol (N220) into a reactor with agitator and dehydrate under vacuum at 120°C for 1 hour. Then add 100g of isophorone diisocyanate, react at 85°C to 90°C for 1.5 hours, add 5g of glycerol, 20g of dimethylol propionic acid and 7g of dimethylene succinic acid derivatives, continue the reaction for 2 hours, add 35g Acetone, then lowered to room temperature, neutralized by adding 21g of tripropylamine, emulsified by adding 600g of deionized water, added 10g of hydrazine hydrate, 12g of tungsten oxide, 2g of defoamer, 2g of leveling agent, stirred and dispersed for 30 minutes to obtain a fabric photosensitive Color-changing water-based polyurethane emulsion.

Embodiment 2

[0018] First add 100g of polyether polyol (N220) into a reactor with a stirrer and dehydrate under vacuum at 120°C for 1 hour, then add 72g of toluene diisocyanate, react at 85°C to 90°C for 1.5 hours, add 12g of 1,4-butanedi Alcohol, 12g dimethylol propionic acid and 15g dimethylene succinic acid derivatives, continue to react for 2 hours, add 20g N-methylpyrrolidone, then cool down to room temperature, add 9g triethylamine for neutralization, add 490g deionized After water emulsification, add 8g ethylenediamine, 2g tungsten oxide, 1g defoamer, 2g leveling agent, stir and disperse for 30 minutes to obtain photochromic water-based polyurethane emulsion for fabric.

Embodiment 3

[0020] First add 40g of polytetrahydrofuran polyol (PTMG-2000), 40g of polyether polyol (N220), and 20g of polycarbonate polyol (PCD-980R) into a reactor with agitator and vacuum dehydrate at 120°C for 1 hour, then Add 100g of diphenylmethane diisocyanate, react at 85°C to 90°C for 1.5 hours, add 8g of trimethylolpropane, 15g of dimethylolpropionic acid and 10g of dimethylene succinic acid derivatives, and continue to react for 2 hours , add 30g acetone, then lower to room temperature, add 12g diethanolamine to neutralize, add 570g deionized water to emulsify, add 23g isophoronediamine, 8g tungsten oxide, 1g foaming agent, 3g leveling agent, stir and disperse for 30 minutes That is, the photosensitive color-changing water-based polyurethane emulsion for fabric is obtained.

[0021] The aqueous polyurethane emulsion prepared in Example 1, 2 or 3 is used for fabric coating, and has photochromic effect.

[0022] In the above-mentioned embodiment, those in parentheses are the kin...

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PUM

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Abstract

The invention discloses a color-photosensitive aqueous polyurethane emulsion for textiles and a preparation method thereof; the product comprises the following raw materials in parts by weight: 100 parts of polyatomic alcohol polymer, 70 to 100 parts of polyisocyanates monomer, 5 to 12 parts of micromolecular polyatomic alcohol, 10 to 20 parts of dihydromethyl propionic acid, 7 to 15 parts of dimethylene-butanedioic acid derivative, 9 to 21 parts of neutralizer, 20 to 35 parts of N-methylpyrrolidone or acetone, 490 to 600 parts of deionized water, 2 to 23 parts of diamine chain extender, 2 to 12 parts of tungstic oxide and 1 to 4 parts of assistant. The preparation method of the product comprises the following steps of: reacting the polyisocyanates monomer with the polyatomic alcohol polymer to generate a prepolymer, adding the micromolecular polyatomic alcohol, the dihydromethyl propionic acid and the dimethylene-butanedioic acid derivative for chain extension, adding the N-methylpyrrolidone or acetone and the neutralizer, and reacting so as to disperse to the deionized water, adding the diamine chain extender for chain extension, and finally adding the tungstic oxide and the assistant so as to obtain the product.

Description

technical field [0001] The invention belongs to the field of textile printing and dyeing materials, in particular to a photosensitive color-changing water-based polyurethane emulsion for fabrics and a preparation method thereof. Background technique [0002] With the introduction of more stringent environmental protection regulations in various countries and the enhancement of people's environmental awareness, water-based polyurethane emulsions with low or zero volatile organic compounds (VOC) will be developed rapidly. [0003] At present, there are two main methods in terms of photochromic change: one is to use optical principles to design the film structure. And can not be widely used; The 2nd, add photosensitive substance, although this method is simple, because of the presence of migration of the photosensitive substance added and unstable performance. Contents of the invention [0004] The object of the present invention is to provide a photosensitive color-changing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/564D06M15/572D06M15/568D06M11/48C08G18/66C08G18/34
Inventor 姚督生
Owner ZHEJIANG LUOXING IND CO LTD
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