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Water-based black and transparent wax polishing leather surface finishing agent with color transfer resistance and preparation method of leather surface finishing agent

A technology of surface treatment agent and color migration, applied in the direction of coating, polyurea/polyurethane coating, etc., can solve problems such as difficult to achieve environmental protection

Inactive Publication Date: 2017-01-04
嘉兴禾大科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the extensive use of organic solvents and the discharge of volatile organic compounds in the production process of solvent-based polyurethane not only easily cause safety hazards, but also make it difficult to meet the requirements of environmental protection. Therefore, the development of water-based polyurethane leather surface treatment agents is imminent

Method used

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  • Water-based black and transparent wax polishing leather surface finishing agent with color transfer resistance and preparation method of leather surface finishing agent
  • Water-based black and transparent wax polishing leather surface finishing agent with color transfer resistance and preparation method of leather surface finishing agent
  • Water-based black and transparent wax polishing leather surface finishing agent with color transfer resistance and preparation method of leather surface finishing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Preparation of water-based PU: 100 g of weighed polyols (20% of polyethylene adipate diol, 20% of polyoxypropylene diol, 60% of reactive polyurethane colorant, and It is black, and the coloring agent that all the other embodiments are used is black) adds in the four-necked flask, starts agitator, stirs. Add 33.3 g of weighed isocyanate (toluene diisocyanate 100%) into the reactor, and add 8 drops of catalyst (100% stannous octoate). Install a thermometer, heat up to 80-85°C, and react within this temperature range for 1.5 hours. Then add 6.9 g of chain extender (50% of ethylene glycol and 50% of dimethylol propionic acid) into the four-necked flask, and continue to react at this temperature for 2 hours. After reaching the reaction time, the reaction temperature was lowered to 65° C., and the nitrogen flow rate was appropriately reduced. Then add 5 g of co-solvent (acetone 100%) to the reactor several times in small amounts to adjust the viscosity of the system. A...

Embodiment 2

[0043](1) Preparation of water-based PU: Add 100 g of weighed polyols (20% of polytetrahydrofuran ether glycol, 20% of polyoxypropylene glycol, and 60% of reactive polyurethane colorant) into a four-necked flask, and start stirring device for stirring. Add 33.3 g of weighed isocyanate (toluene diisocyanate 100%) into the reactor, and add 8 drops of catalyst (100% stannous octoate). Install a thermometer, heat up to 80-85°C, and react within this temperature range for 1.5 hours. Then add 6.9 g of chain extender (50% of 1,4-butanediol and 50% of dihydroxy half ester) into the four-necked flask, and continue to react at this temperature for 2 hours. After reaching the reaction time, the reaction temperature was lowered to 65° C., and the nitrogen flow rate was appropriately reduced. Then in the reactor, a total of 5 g (100% of acetone) of co-solvent was added several times in small amounts to adjust the viscosity of the system. After stirring evenly, slowly dropwise add 5 g of...

Embodiment 3

[0046] (1) Preparation of water-based PU: Add 100 g of weighed polyols (15% of polycaprolactone diol, 25% of polybutadiene diol, 60% of reactive polyurethane colorant) into a four-necked flask, Start the mixer and stir. Add 33.3 g of weighed isocyanate (50% of toluene diisocyanate and 50% of isophorone diisocyanate) into the reactor, and add 8 drops of catalyst (100% of organic bismuth). Install a thermometer, heat up to 80-85°C, and react within this temperature range for 1.5 hours. Then add 6.9 g of chain extender (50% of ethylene glycol and 50% of dimethylol propionic acid) into the four-necked flask, and continue to react at this temperature for 2 hours. After reaching the reaction time, the reaction temperature was lowered to 65° C., and the nitrogen flow rate was appropriately reduced. Then in the reactor, a total of 5 g of co-solvent (100% methyl ethyl ketone) was added several times in small amounts to adjust the viscosity of the system. After stirring evenly, slowl...

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Abstract

A water-based black and transparent wax polishing PU (polyurethane) leather surface finishing agent with color transfer resistance is prepared from water-based PU, matting powder, a wetting agent, a pH regulator and water, wherein water-based PU is prepared from diisocyanate, polyalcohol, a chain extender, a catalyst, a salt forming agent and a cosolvent through a reaction in water; polyalcohol is a mixture of a reactive type PU coloring agent and other polyalcohol, and the mass of the reactive type PU coloring agent is 40%-70% of the total mass of polyalcohol. Compared with a common wax polishing leather surface finishing agent, the water-based black and transparent wax polishing PU leather surface finishing agent with the color transfer resistance has the characteristics as follows: the consumption of an organic solvent is low, emission of volatile organic compounds in a production process is low, coloring groups are distributed uniformly, the color is uniform, the coloring firmness is high, the phenomena of color losing, decolorization, color fading and the like caused by color transfer are eliminated, addition of a color fixing agent is reduced, the safety and low toxicity are realized, the color is full and transparent, the agent has luster and chromaticity similar to those of leather, and the leather is endowed with waxy feeling and the like.

Description

technical field [0001] The invention relates to a surface treatment agent for leather, in particular to a water-based color-resistant migration black through-wax polish leather surface treatment agent and a preparation method thereof. Background technique [0002] Since the polyurethane material was first used for leather finishing in the 1960s, it has become an important system of leather surface treatment agents due to its obvious advantages such as simple preparation process and excellent film-forming performance. However, the extensive use of organic solvents and the discharge of volatile organic compounds in the production of solvent-based polyurethane not only easily cause safety hazards, but also make it difficult to meet environmental protection requirements. Therefore, the development of water-based polyurethane leather surface treatment agents is imminent. On the other hand, in order to meet market demand, leather surface treatment agents must also pursue the color...

Claims

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Application Information

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IPC IPC(8): C09D175/06C09D175/08C09D175/04C09D7/12
CPCC09D175/06C08K3/346C08K3/36C08L2205/03C09D7/61C09D175/04C09D175/08
Inventor 薛振华陆天徐立强
Owner 嘉兴禾大科技有限公司
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