Water-based suede slurry, and method and application of wet processing suede

A suede, water-based technology, used in transportation and packaging, flexible coverings, textiles and papermaking, etc., can solve the problems of electronic microfiber leather that is not full, environmentally friendly, and low in softness.

Active Publication Date: 2021-03-09
WANHUA CHEMICAL (NINGBO) CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Published patent application 201310008066.0 describes a production method of water-based electronic packaging microfiber, in which the microfiber cloth is immersed in water-based polyurethane slurry, and directly dried and formed; this production method has no solvent, and the whole process is a non-solvent water-based environment; but The prepared electronic microfiber leather does not feel plump and soft
Published patent application 201210164124.4 describes a highly breathable and environmentally friendly water-based polyurethane suede synthetic leather and its preparation method. It coats the water-based polyurethane rubber on the fleece knitted fabric, and directly dries and shapes it, which has very excellent air permeability. But the cost is high, mostly suitable for shoe leather, not suitable for electronic packaging
Published patent application 201110302564.7 describes the production method of synthetic leather used in electronic products. During the whole production process, a large amount of solvents such as dimethylformamide are produced that pollute the environment, which is not friendly to the environment.

Method used

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  • Water-based suede slurry, and method and application of wet processing suede
  • Water-based suede slurry, and method and application of wet processing suede
  • Water-based suede slurry, and method and application of wet processing suede

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preparation example Construction

[0059] Preparation of aqueous polyurethane dispersion A:

[0060] 223g WANOL C2056 (polyether polyol), 44g TDI 80 (toluene diisocyanate), 5g 1,4-butanediol (diol chain extender), 5g dimethylol propionic acid (hydrophilic chain extender) and 50 g of acetone (solvent) were added into a 1 L four-neck round-bottomed flask equipped with a nitrogen inlet and outlet, and the mixture was stirred at 75° C. until NCO reached 1.3 wt%. Cool down to 40-45°C, add 231g of acetone and 3.8g of triethylamine to neutralize for about 5 minutes, then disperse the mixture by adding 420g of water, add 4g of isophoronediamine (small molecule amine chain extender) after the dispersion and continue stirring Chain extension for 10 minutes. After separation of the acetone by distillation, a solvent-free dispersion was obtained which had a solids content of 43% by weight, an average particle size of 220 nm and a pH value of 8.4.

[0061] Preparation of Aqueous Polyurethane Dispersion B:

[0062]Add 400...

Embodiment 1

[0070] The "parts" mentioned in the formulas of the embodiments all refer to parts by mass, and the same is true in other embodiments, so no more details are given.

[0071]

[0072] In the present embodiment, take water-based polyurethane dispersion A mass part and 4316, dispersant ( 731A), the rotating speed of 600 rev / min stirred for 10 minutes, then added talcum powder (mesh number 2000), the rotating speed of 800 rev / min stirred for 15 minutes, added whipping agent ( STA), foam stabilizer ( SR), water-based red paste (Shiming Technology TSELR22), thickener (VesmodyU300, water-based polyurethane thickener), thickener (VesmodyU605, water-based polyurethane thickener), stirred for 15 minutes at a speed of 1000 rpm, Prepare a slurry with a viscosity of about 4000cp, using a mechanical foaming machine (Italy GEMAT foaming machine MICROMIX / 14) with a foaming ratio of 2 times.

Embodiment 2

[0074]

[0075]

[0076] In the present embodiment, get aqueous polyurethane dispersion B and 4316, dispersant ( 731A), the rotating speed of 600 rev / min stirred for 10 minutes, then added talcum powder (mesh number 2000), the rotating speed of 800 rev / min stirred for 15 minutes, added whipping agent ( STA), foam stabilizer ( SR), water-based red paste (Shiming Technology TSELR22), thickener (VesmodyU300, water-based polyurethane thickener), thickener (VesmodyU605, water-based polyurethane thickener), stirred for 15 minutes at a speed of 1000 rpm, Prepare a slurry with a viscosity of about 4000cp; use a mechanical foaming machine to double the foaming ratio.

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Abstract

The invention relates to water-based suede leather slurry, a method for processing suede leather by a wet process and application. The water-based suede leather slurry provided by the invention is prepared from the following components in parts by mass: water-based polyurethane dispersion: 70 to 95 parts, preferably 80 to 90 parts; water-based acrylic acid emulsion: 5 to 30 parts, preferably 10 to25 parts; a foam stabilizer: 1 to 5 parts, preferably 2 to 3 parts; and a foaming agent: 1 to 5 parts, preferably 2 to 3 parts. Processing slurry prepared by foaming the water-based suede leather slurry provided by the invention is particularly suitable for processing of the suede leather by the wet process, and the obtained suede leather is particularly suitable for the field of electronic packaging; furthermore, the water-based suede leather slurry provided by the invention is environment-friendly and pollution-free, and the suede leather prepared by the wet process has excellent hand feeling.

Description

technical field [0001] The invention relates to the field of water-based suede slurry, and further relates to a slurry suitable for electronic packaging suede processing, in particular to a water-based suede slurry suitable for wet process processing of suede and a preparation method thereof and apply. Background technique [0002] With the rapid development of my country's electronics industry, the demand for electronic packaging such as mobile phone cases, tablet computer protective cases and other electronic products is also increasing. Most of the traditional electronic packaging leather is made of PVC material or oily PU material. The traditional process is to replace DMF with oily PU to make electronic packaging leather. The disadvantage of this traditional process is that DMF (dimethylamide) used in the production process of oily PU materials is harmful to the human body and the environment, and the products produced have residual solvents, which are not only environ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C09D133/12C09D7/61C09D7/44D06N3/14B65D65/38
CPCB65D65/38C08L2205/025C08L2205/035C09D175/08D06N3/14D06N3/146C08L33/064C08L75/04C08K3/34
Inventor 邓俊英李海峰王震耿丹丹纪学顺孙家宽华卫琦
Owner WANHUA CHEMICAL (NINGBO) CO LTD
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