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Method for enhancing water resistance of waterborne polyurethane for synthetic leather by using magnesium aluminum silicate

A technology of water-based polyurethane and magnesium aluminum silicate, which is applied in the field of synthetic leather, can solve the problems of complex preparation steps of tremella-shaped zinc oxide, difficulty in industrialized large-scale production, and poor repeatability of tremella-shaped zinc oxide, so as to improve hygienic performance and enhance water resistance Performance, water resistance improvement effect

Inactive Publication Date: 2018-08-31
JIANGXI MINGCHUAN SCI & TECH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation steps of tremella-shaped zinc oxide are relatively complicated, and the repeatability of the size and structure of the tremella-shaped zinc oxide prepared by this method is difficult to apply to industrialized large-scale production

Method used

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  • Method for enhancing water resistance of waterborne polyurethane for synthetic leather by using magnesium aluminum silicate
  • Method for enhancing water resistance of waterborne polyurethane for synthetic leather by using magnesium aluminum silicate
  • Method for enhancing water resistance of waterborne polyurethane for synthetic leather by using magnesium aluminum silicate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Drying of magnesium aluminum silicate: dry magnesium aluminum silicate in an oven at 100-110°C to constant weight, and make it into fine powder by ultrafine pulverizer;

[0021] (2) Modification of magnesium aluminum silicate: Add 40g of magnesium aluminum silicate after drying into 200g of absolute ethanol, stir and disperse evenly, heat to reflux state and keep stirring for 15min, then add 5g of hexamethylolmelamine hexamethyl ether and 5g of ethylene glycol diglycidyl ether, continue to keep stirring under reflux for 3h, the resulting mixture is cooled to -10~-5°C at a cooling rate of 5~10°C / min and stirred for 30min, then concentrated under reduced pressure to recover ethanol , the concentrated residue is dried in an oven at 70-80°C to constant weight, and finally made into a fine powder by an ultrafine pulverizer to obtain modified magnesium aluminum silicate;

[0022] (3) Modification of water-based polyurethane: disperse the above-mentioned 50g of modified ma...

Embodiment 2

[0024] (1) Drying of magnesium aluminum silicate: dry magnesium aluminum silicate in an oven at 100-110°C to constant weight, and make it into fine powder by ultrafine pulverizer;

[0025] (2) Modification of magnesium aluminum silicate: Add 50g of magnesium aluminum silicate after drying into 300g of absolute ethanol, stir and disperse evenly, heat to reflux state and keep stirring for 15min, then add 8g of hexamethylolmelamine hexamethyl ether and 5g of ethylene glycol diglycidyl ether, continue to keep stirring under reflux for 3h, the resulting mixture is cooled to -10~-5°C at a cooling rate of 5~10°C / min and stirred for 30min, then concentrated under reduced pressure to recover ethanol , the concentrated residue is dried in an oven at 70-80°C to constant weight, and finally made into a fine powder by an ultrafine pulverizer to obtain modified magnesium aluminum silicate;

[0026] (3) Modification of water-based polyurethane: disperse the above-mentioned 50g of modified ma...

Embodiment 3

[0028] (1) Drying of magnesium aluminum silicate: dry magnesium aluminum silicate in an oven at 100-110°C to constant weight, and make it into fine powder by ultrafine pulverizer;

[0029] (2) Modification of magnesium aluminum silicate: Add 50g of magnesium aluminum silicate after drying into 300g of absolute ethanol, stir and disperse evenly, heat to reflux state and keep stirring for 15min, then add 8g of hexamethylolmelamine hexamethyl ether and 5g of ethylene glycol diglycidyl ether, continue to keep stirring under reflux for 3h, the resulting mixture is cooled to -10~-5°C at a cooling rate of 5~10°C / min and stirred for 30min, then concentrated under reduced pressure to recover ethanol , the concentrated residue is dried in an oven at 70-80°C to constant weight, and finally made into a fine powder by an ultrafine pulverizer to obtain modified magnesium aluminum silicate;

[0030] (3) Modification of water-based polyurethane: disperse the above-mentioned 50g of modified ma...

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Abstract

The invention discloses a method for enhancing water resistance of waterborne polyurethane for synthetic leather by using magnesium aluminum silicate and relates to the technical field of synthetic leather. The method comprises the following steps of (1) drying of magnesium aluminum silicate, (2) modifying of the magnesium aluminum silicate, and (3) modifying of the waterborne polyurethane. The water resistance of a waterborne polyurethane coating can be remarkably enhanced by the prepared modified magnesium aluminum silicate, at the same time, the sanitation performance of the waterborne polyurethane coating is improved by the aid of the specific large specific surface of the modified magnesium aluminum silicate, the water resistance and the sanitation performance of the waterborne polyurethane coating can be remarkably improved simultaneously, the water resistance can reach 65% or above, and the sanitation performance can each 55% or above.

Description

Technical field: [0001] The invention relates to the technical field of synthetic leather, in particular to a method for enhancing the water resistance of synthetic leather by using magnesium aluminum silicate. Background technique: [0002] Polyurethane synthetic leather has the advantages of soft luster, soft touch, strong leather feel, abrasion resistance, flex resistance, aging resistance, mold resistance, cold resistance, and washability. It has become the most ideal substitute for natural leather. However, most of the resins used in the polyurethane synthetic leather industry are solvent-based polyurethane resins, which contain a large amount of toxic and harmful chemical solvents such as dimethylformamide and toluene, and a large amount of chemical solvents will volatilize during the production and use of synthetic leather to the environment. [0003] In order to overcome the environmental pollution caused by solvent-based polyurethane, in recent years people have be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/14D06N3/00
CPCD06N3/0061D06N3/0063D06N3/14D06N2209/142D06N2211/28
Inventor 汪国水李清
Owner JIANGXI MINGCHUAN SCI & TECH IND