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Non-ionic waterborne polyurethane coating agent for leather and preparation method thereof

A water-based polyurethane and non-ionic technology, applied in the direction of polyurea/polyurethane coating, application, coating, etc., can solve the problems such as the use and technical effect of the leather finishing agent that have not been stated, and achieve the improvement of fastness, leather grade and production cost Low, reduce the effect of production and transportation costs

Active Publication Date: 2017-05-31
LIAONING FIXED STAR FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The product of this invention is just a kind of glass fiber dipping agent, which is used to improve the strength of glass fiber. It is not suitable for leather finishing agents, and there is no statement that it can be used for leather finishing agents and its technical effects

Method used

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  • Non-ionic waterborne polyurethane coating agent for leather and preparation method thereof
  • Non-ionic waterborne polyurethane coating agent for leather and preparation method thereof
  • Non-ionic waterborne polyurethane coating agent for leather and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Raw material ratio by weight:

[0053] (1) Prepolymerization reaction: 28.8 parts of isophorone diisocyanate (IPDI), 5.6 parts of hexamethylene diisocyanate, 21 parts of polytetramethylene glycol (molecular weight 800), polycarbonate diol (molecular weight Add 40 parts of 1000) and 25 parts of acetone into the reaction kettle, heat up to 80-85°C and stir for 1.5 hours;

[0054] (2) Chain extension reaction: add 5 parts of polyethylene glycol monomethyl ether (molecular weight 800), 10 parts of polyethylene glycol ether (molecular weight 220), and continue to react for 3.5 hours at 80-85 °C;

[0055] (3) Emulsification reaction: Add 180 parts of deionized water, quickly disperse, stir and react at 50-55°C for 0.5 hours;

[0056] (4) Chain extension reaction: Add 8.2 parts of small molecule chain extender isophorone diamine, stir and react at 50-55°C for 2.5 hours, cool down to 40-45°C, extract the solvent acetone under reduced pressure to obtain the product, cool down f...

Embodiment 2

[0059] Raw material ratio by weight:

[0060] (1) Prepolymerization reaction: 35 parts of isophorone diisocyanate (IPDI), 17 parts of hexamethylene diisocyanate, 28 parts of polytetramethylene glycol (molecular weight 1000), polycarbonate diol (molecular weight Add 70 parts of 3000) and 25 parts of acetone into the reaction kettle, heat up to 80-85°C and stir for 2 hours;

[0061] (2) Chain extension reaction: add 10 parts of polyethylene glycol monomethyl ether (molecular weight 800), 10 parts of polyethylene glycol ether (molecular weight 200), ethylene oxide, propylene oxide block copolyether (molecular weight 300) Continue to react 10 parts at 80-85°C for 4 hours;

[0062] (3) Emulsification reaction: Add 280 parts of deionized water, quickly disperse, stir and react at 50-60°C for 0.5 hours;

[0063] (4) Chain extension reaction: Add 7.3 parts of small molecule chain extender ethylenediamine, stir and react at 55-60°C for 2-3 hours, cool down to 40-45°C, extract the sol...

Embodiment 3

[0066] Raw material ratio by weight:

[0067] (1) Prepolymerization reaction: 20 parts of isophorone diisocyanate (IPDI), 15 parts of hexamethylene diisocyanate, 15 parts of polytetramethylene glycol (molecular weight 500), polycarbonate diol (molecular weight 2000) 60 parts and 29 parts of acetone were added to the reaction kettle, and the temperature was raised to 80-85°C and stirred for 1.5 hours;

[0068] (2) Chain extension reaction: Add 8 parts of polyethylene glycol monomethyl ether (molecular weight 1200), 15 parts of ethylene oxide and propylene oxide block copolyether (molecular weight 400), and continue to react for 4 hours at 80-85 °C;

[0069] (3) Emulsification reaction: add 210.6 parts of deionized water, quickly disperse, stir and react at 55-60°C for 1 hour;

[0070] (4) Chain extension reaction: Add 5.6 parts of small molecule chain extender triethylenediamine and 1.8 parts of ethylenediamine, stir and react at 50-55°C for 2.5 hours, cool down to 40-45°C, ex...

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Abstract

The invention provides a non-ionic waterborne polyurethane coating agent for leather and a preparation method thereof. The coating agent is prepared from 20-50 parts of isophorone diisocyanate, 5-35 parts of hexamethylene diisocyanate, 10-30 parts of polytetramethylene glycol, 40-70 parts of polycarbonate diols, 3-10 parts of methoxypolyethylene glycols, 25-35 parts of acetone, 10-20 parts of chain extender, 5-20 parts of a small molecule chain extender, and 150-500 parts of deionized water. The preparation method comprises the following steps: carrying out pre-polymerization reaction, chain extension reaction, emulsification reaction and chain extension reaction. The coating agent is used for leather finishing, and has the advantages of being fluffy, dry and high in elasticity, softness, high fastness and no plastic feeling.

Description

technical field [0001] The invention relates to a non-ionic water-based polyurethane finishing agent for leather and its preparation method, in particular to a non-ionic water-based polyurethane finishing agent for leather with fluffy, dry, high elasticity, softness, high fastness and no plastic feeling and preparation method. Background technique [0002] The leather finishing agent resin products in the market are mainly divided into two types, one is water-based acrylic resin emulsion; the other is water-based polyurethane emulsion. Among them, most of the water-based polyurethane emulsions are anionic products, and there are also a small number of cationic products. And be used for the nonionic aqueous polyurethane technology of leather finishing agent and have no report. [0003] Patent CN201210579375.9 "Waterborne Nonionic Polyurethane Antistatic Coating and Its Preparation Method and Application" The present invention provides a waterborne nonionic polyurethane anti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C08G18/12C08G18/66C08G18/40C08G18/48C08G18/44C08G18/32C08G18/28C14C11/00
CPCC08G18/12C08G18/283C08G18/4018C08G18/44C08G18/4837C08G18/4854C08G18/6618C09D175/04C14C11/006C08G18/3206C08G18/3234C08G18/48C08G18/3228
Inventor 唐丽党瑞东荣星陈龙
Owner LIAONING FIXED STAR FINE CHEM
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