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A kind of preparation method of water-based matting surface treatment agent for synthetic leather

A surface treatment agent, a technology for synthetic leather, applied in the directions of fiber treatment, fiber type, textiles and papermaking, etc., can solve the problems of whitening on the surface of synthetic leather, affecting the aesthetics of synthetic leather, etc., to achieve convenient operation, high permeability, Overcome the whitening effect

Active Publication Date: 2017-06-27
四川眉山市康乐仕化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional matting treatment of synthetic leather uses inorganic silica as matting particles. After compounding with polyurethane film-forming agent, it has a good matting effect. However, silica is an inorganic substance, and there is a gap between the inorganic phase silica and the organic phase polyurethane. Organic-inorganic interface. Synthetic leather is a soft polyurethane product with good elongation. When the synthetic leather is stretched, the silica and polyurethane film-forming agent in the matting surface treatment agent will produce an interface between the organic phase and the inorganic phase. Separation, resulting in whitening of the surface of synthetic leather, affecting the aesthetics of synthetic leather

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A method for preparing a water-based matting surface treatment agent for synthetic leather. In a dispersion kettle equipped with an electric shear and a constant pressure funnel, add 100 parts of an aqueous polyurethane dispersion (the effective solid content of the aqueous polyurethane dispersion is 20%), 1 part of polyvinyl alcohol, 1 part of dispersant, 2 parts of emulsifier, at room temperature (25°C), with a shear rate of 1300r / min, 3.03 parts of 4,4'-dicyclohexyl were added dropwise through a constant pressure funnel Methane diisocyanate HMDI (diluted with 20 parts of acetone) and 1.97 parts of isophorone diamine IPDA (diluted with 20 parts of acetone), added dropwise in 1 hour, continued to stir for 1 hour, distilled off the acetone under reduced pressure, and then added 1% silicone leveling agent, 2% associative polyurethane thickener, adjust viscosity 1000~2000mPa.S -1 , continue to disperse for 1 hour, and filter with a 120-mesh filter cloth to obtain a water-...

Embodiment 2

[0015] A method for preparing a water-based matting surface treatment agent for synthetic leather. In a dispersion kettle equipped with an electric shear and a constant pressure funnel, add 100 parts of an aqueous polyurethane dispersion (the effective solid content of the aqueous polyurethane dispersion is 20%), 1 part of polyvinyl alcohol, 1 part of dispersant, 2 parts of emulsifier, at room temperature (25°C), with a shear rate of 1300r / min, drop 4.55 parts of 4,4'-dicyclohexyl through a constant pressure funnel Methane diisocyanate HMDI (diluted with 20 parts of acetone) and 2.96 parts of isophorone diamine IPDA (diluted with 20 parts of acetone), added dropwise in 1 hour, continued to stir for 1 hour, distilled off the acetone under reduced pressure, and then added 1% silicone leveling agent, 2% associative polyurethane thickener, adjust viscosity 1000~2000mPa.S -1 , continue to disperse for 1 hour, and filter with a 120-mesh filter cloth to obtain a water-based matting s...

Embodiment 3

[0017] A method for preparing a water-based matting surface treatment agent for synthetic leather. In a dispersion kettle equipped with an electric shear and a constant pressure funnel, add 100 parts of an aqueous polyurethane dispersion (the effective solid content of the aqueous polyurethane dispersion is 20%), 1 part of polyvinyl alcohol, 1 part of dispersant, 2 parts of emulsifier, at room temperature (25°C), with a shear rate of 1300r / min, 6.06 parts of 4,4'-dicyclohexyl were added dropwise through a constant pressure funnel Methane diisocyanate HMDI (diluted with 20 parts of acetone) and 3.94 parts of isophorone diamine IPDA (diluted with 20 parts of acetone), added dropwise in 1 hour, continued to stir for 1 hour, distilled off the acetone under reduced pressure, and then added 1% silicone leveling agent, 2% associative polyurethane thickener, adjust viscosity 1000~2000mPa.S -1 , continue to disperse for 1 hour, and filter with a 120-mesh filter cloth to obtain a water-...

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Abstract

The invention discloses a preparation method for an aqueous matt surface treating agent for synthetic leather. The preparation method for the aqueous matt surface treating agent for the synthetic leather comprises the following steps of respectively adding diamine and diisocyanate dropwise into aqueous polyurethane dispersion sheared at a high speed to produce high-melting-point and high-hardness carbamic acid ester matt particles of which the grain size is 5 to 10 microns in the aqueous polyurethane dispersion by utilizing the high reaction activity of the diamine and the diisocyanate; then, adding a flatting agent and a thickening agent; evenly dispersing, and regulating viscosity to be 1000 to 2000mPa.S-1 to obtain the aqueous matt surface treating agent for the synthetic leather; as the carbamic acid ester matt particles and a polyurethane system are close in diopter, and a traditional organic-inorganic interface of silicon dioxide and organic polymer does not exist in a matt film, the aqueous matt surface treating agent has the characteristics of being high in transparency, no injection marks, and the like.

Description

technical field [0001] The invention relates to a water-based delustering treatment agent for synthetic leather, which belongs to the artificial leather auxiliary technology of material technology and fine chemical industry. Background technique [0002] Synthetic leather is a kind of polyurethane soft product. The traditional synthetic leather surface treatment agent is generally prepared by solvent polyurethane. Its use has brought huge damage to the environment. Water-based polyurethane surface treatment agent can solve the pollution of synthetic leather surface treatment agent very well. question. Matting treatment is one of the most common surface effects in the surface treatment of synthetic leather. It can endow synthetic leather with soft natural luster and good touch, and is widely loved by the market. The traditional matting treatment of synthetic leather uses inorganic silica as matting particles. After compounding with polyurethane film-forming agent, it has a g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/564D06M15/333D06M13/50D06M15/643D06M101/38
Inventor 陈新杨明华李季衡赵莉莉
Owner 四川眉山市康乐仕化工有限公司
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