Waterborne polyurethane leather finishing agent and preparation method thereof

A technology of water-based polyurethane and leather finishing agent, applied in polyurea/polyurethane coating, leather surface treatment, small raw hide/large raw hide/leather/fur treatment, etc. Excellent light resistance, improved selection rate, and soft hand feel

Active Publication Date: 2015-03-25
泰兴市华盛银洋新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a water-based polyurethane leather finishing agent and a preparation method thereof, aiming at solving the problem of unsatisfactory glossiness of the current water-based leather finishing agent

Method used

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  • Waterborne polyurethane leather finishing agent and preparation method thereof
  • Waterborne polyurethane leather finishing agent and preparation method thereof
  • Waterborne polyurethane leather finishing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In parts by weight, under the protection of nitrogen, react 10 parts of CAB, 40 parts of PTMG-2000, and 35 parts of IPDI at 80-85°C for 2-3h, add 5 parts of DMPA, and continue at 80-85°C React for 3-5 hours, lower the temperature to 40°C, add 4 parts of triethylamine, react for 30 minutes, and disperse with water at high speed, then add 6 parts of ethylenediamine and disperse for 1 hour to obtain a CAB modified waterborne polyurethane dispersion. The typical characteristics of its products are as follows:

[0030]

Embodiment 2

[0032] In parts by weight, under the protection of nitrogen, react 15 parts of CAB, 35 parts of PTMG-2000, and 40 parts of IPDI at 80-85°C for 2-3h, add 5 parts of DMPA, and continue at 80-85°C React for 3-5 hours, lower the temperature to 40°C, add 4 parts of triethylamine, react for 30 minutes, and disperse at high speed with water, then add 6.3 parts of ethylenediamine and disperse for 0.5 hours to obtain a CAB modified waterborne polyurethane dispersion. The typical characteristics of its products are as follows:

[0033]

Embodiment 3

[0035] In parts by weight, under the protection of nitrogen, react 20 parts of CAB, 30 parts of PTMG-2000, and 40 parts of IPDI at 80-85°C for 2-3 hours, add DMPA, and continue the reaction at 80-85°C After 3-5 hours, cool down to 40°C, add 4 parts of triethylamine, react for 30 minutes, and disperse at high speed with water, then add 5 parts of ethylenediamine and disperse for 1 hour to obtain CAB modified waterborne polyurethane dispersion. The typical characteristics of its products are as follows:

[0036]

[0037] The invention provides a water-based polyurethane leather finishing agent and a preparation method thereof. The water-based polyurethane is modified by using cellulose acetate butyrate to obtain a CAB modified water-based polyurethane dispersion. The resin film is bright, tough, good flex resistance, endows leather with excellent high gloss, smooth, soft feel and good ironing performance, as well as excellent light resistance, heat resistance, non-yellowing a...

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Abstract

The invention discloses a waterborne polyurethane leather finishing agent and a preparation method thereof. The method comprises steps as follows: using diisocyanate, CAB (cellulose acetate butyrate) and a polyether polyol to generate an isocyanate-group-terminated prepolymer, then performing neutralization with triethylamine after extending a chain with a hydrophilic chain extender, and finally, extending a chain with ethylenediamine to form a CAB-modified waterborne polyurethane dispersion so as to obtain the waterborne polyurethane leather finishing agent. According to the waterborne polyurethane leather finishing agent and the preparation method thereof, waterborne polyurethane is modified with the CAB, and the CAB-modified waterborne polyurethane dispersion is obtained. A resin film is bright, firm and good in deflection resistance, leather is endowed with the excellently high gloss, the smooth and soft hand feeling, the good ironing performance and excellent characteristics of light fastness, heat resistance, non-yellowing performance and the like, the selection rate of the leather is greatly increased after top finishing, and the grade of the leather is increased.

Description

technical field [0001] The invention relates to the technical field of leather surface coating, in particular to a water-based polyurethane leather finishing agent and a preparation method thereof. Background technique [0002] Finishing is a very important method in leather production, which can significantly improve the quality and grade of finished leather, increase the variety and commercial value of leather, and is the last "lifeline" in leather production. Polyurethane (PU) leather finishing agent has become an important leather finishing agent system because of its bright, plump, wear-resistant, good film-forming performance, high elasticity, low temperature resistance, flex resistance, and good hand feeling. In particular, water-based PU coating agent has the advantages of non-combustibility, low odor, no pollution, energy saving, convenient operation and processing because it uses water as the medium, and has replaced solvent-based PU coating agent to a large extent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/64C08G18/48C08G18/12C09D175/08C14C11/00
CPCC08G18/12C08G18/3228C08G18/348C08G18/4081C08G18/4854C08G18/6484C08G18/6666C08G18/6685C08G18/6692C08G18/755C09D175/08C14C11/006
Inventor 赵志辉刘涛
Owner 泰兴市华盛银洋新材料科技有限公司
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