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Leather coating agent and preparation and application method thereof

A leather finishing agent and finishing agent technology, which is applied in the fields of leather surface treatment, small raw hide/big raw hide/leather/fur treatment, small raw hide/large raw hide/leather skin/fur chemical treatment, etc., to achieve easy operation of the preparation process and pattern The effect of clear text and great application prospects

Inactive Publication Date: 2018-07-31
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh each raw material component according to the following weight ratio: 11.50% of toluene diisocyanate, 35.00% of polyether polyol with a number average molecular weight Mn of 1000, 3% of ethylene glycol, 14.75% of dimethylformamide, and 15% of butanone , 17.00% of xylene, 0.25% of n-butanol, 0.30% of BHT antioxidant, 0.20% of silicone oil, and 3.0% of pentaerythritol with a particle size of 1 μm.

[0025] Specific steps are as follows:

[0026] Put toluene diisocyanate, polyether polyol, antioxidant and organic solvent (mixture of dimethylformamide, methyl ethyl ketone and xylene) into the reaction kettle and heat to about 75°C, and stir for about 4 hours; during the reaction, add Dimethylformamide solution of ethylene glycol to control the viscosity of the system, and finally add n-butanol to terminate the reaction. Continue to stir for 30 minutes, add pentaerythritol into the reaction kettle, add silicone oil and stir for another half an hour, and discharge the m...

Embodiment 2

[0029] Preparation of a high-temperature hot-press carbonization color-developing leather finishing agent, each raw material component is weighed according to the following weight ratio: toluene diisocyanate 11.50%, number average molecular weight Mn is 1000 polyether polyol 35.00%, ethylene glycol 4 %, 20.00% dimethylformamide, 10% methyl ethyl ketone, 12.75% xylene, 0.25% isobutanol, 0.30% BHT antioxidant, 0.20% silicone oil, 6.0% pentaerythritol with a particle size of 1 μm.

[0030] The production process of the high-temperature hot-press carbonization color-developing leather finishing agent, the specific steps are as follows:

[0031] Put toluene diisocyanate, polyether polyol, antioxidant and organic solvent (mixture of dimethylformamide, methyl ethyl ketone and xylene) into the reaction kettle and heat to about 75°C, and stir for about 4 hours. During the reaction, add Dimethylformamide solution of ethylene glycol to control the viscosity of the system, and finally add...

Embodiment 3

[0034] Preparation of a high-temperature hot-press carbonization color-developing leather finishing agent, each raw material component is weighed according to the following weight ratio: toluene diisocyanate 11.50%, number average molecular weight Mn is 1000 polyether polyol 35.00%, ethylene glycol 3 %, dimethylformamide 30.75%, butanone 10%, xylene 5.00%, n-butanol 0.25%, BHT antioxidant 0.30%, silicone oil 0.20%, pentaerythritol 4.0% with a particle size of 2 μm.

[0035] The production process of the high-temperature hot-press carbonization color-developing leather finishing agent, the specific steps are as follows:

[0036] Put toluene diisocyanate, polyether polyol, antioxidant and organic solvent (mixture of dimethylformamide, methyl ethyl ketone and xylene) into the reaction kettle and heat to about 75°C, and stir for about 4 hours. During the reaction, add Dimethylformamide solution of ethylene glycol to control the viscosity of the system, and finally add n-butanol to...

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PUM

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Abstract

The invention discloses a leather coating agent and a preparation and application method thereof. The coating agent is prepared from, by weight, 15-25% of diisocyanate, 30-40% of polyhydric alcohol, 2-4% of small-molecular dihydric alcohol, 35-45% of organic solvent, 1-5% of compression change powder, 0.3-1.0% of termination agent, 0.15% of antioxidant and 0.20% of silicone oil. After Base leatheris coated with the coating agent, the leather is roasted at 110-140 DEG C for 3-8 min, then immersed in water and subjected to water kneading treatment for 20-45 min and secondary drying, and after the leather is dried, thermal compression treatment is conducted. The compression change powder is heated and carbonized and turns black for color development, for the part after thermal compression, the compression change powder is carbonized and turns black, color development is not conducted on the part without thermal printing, under the contrast, obtained characters and patterns are extremelyclear, and the leather coating agent has great application prospects in the field of pattern preparation of bags and suitcases, clothing and shoe materials.

Description

technical field [0001] The invention belongs to the field of leather auxiliary agents, in particular to a leather finishing agent and its preparation and use method. Background technique [0002] The leather finishing agent is coated on the surface of genuine leather, PU leather and PVC leather, and forms a uniform protective film on the surface of the leather. It has the advantages of resistance to dry and wet wiping, resistance to twists and turns, certain water resistance, and easy cleaning and maintenance. At present, leather finishing agents mainly include nitrocellulose system, acrylic resin system and polyurethane system, among which the finishing agent of polyurethane system is the main one. In PU resin, adding different additives and color chip toner, combined with appropriate post-processing technology, the leather made has different appearance patterns and handles, and can be produced into bags and shoe materials of different popular styles, which greatly improves...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/32C08G18/42C08G18/48C08G18/66C09D175/06C09D175/08C14C11/00
CPCC08G18/48C08G18/3206C08G18/42C08G18/664C08G18/6674C09D175/06C09D175/08C14C11/006
Inventor 潘朝群
Owner SOUTH CHINA UNIV OF TECH