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Permanent antistatic polyurethane resin for leather and preparation method thereof

A polyurethane resin, anti-static technology, used in textiles and paper making, etc., can solve problems such as reducing the surface resistivity of leather, and achieve the effects of good anti-static effect, improved compatibility, and large molar mass.

Inactive Publication Date: 2015-06-03
广东大盈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

[0002] At present, most of the antistatic technologies used in the polyurethane leather industry are to add antistatic agents to polyurethane. Since the antistatic agents are not compatible with polyurethane, the antistatic agents will gradually migrate to the leather surface. The antistatic agents rely on the surface to be absorbed by water Wetting, so as to dredge the static charge and reduce the resistivity of the leather surface; but after washing and abrasion, the antistatic agent gradually moves to the leather surface, and the antistatic agent gradually decreases and disappears

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] It is a permanent antistatic polyurethane resin for leather, including 5% isocyanate, 18% polyol compound, 5% diol chain extender with molecular weight below 150, 66% solvent, 5% Auxiliary agent and 1% catalyst, they are percentage by weight.

[0022] Its preparation method comprises the following steps:

[0023] a. Put the polyol compound into a drying room or an oven to heat it into a liquid, and use dehydration equipment to dry and remove water so that the moisture content is less than 0.03%;

[0024] b. Add 15% solvent, 18% polyol compound (polyol compound with water content less than 0.03%), 4% glycol chain extender, 5% additive and 1% catalyst into the reactor , fully stirred, and the temperature of the stirring was controlled at 50°C;

[0025] c. Add 3% isocyanate into the reaction kettle of step b, control the temperature of the reaction system at 75° C., and the reaction time is 1.5 hours;

[0026] d. Add the remaining 1% glycol chain extender and 1...

Embodiment 2

[0031] It is a permanent anti-static polyurethane resin for leather, including 8% isocyanate, 12% polyol compound, 7% glycol chain extender with molecular weight below 150, 69% solvent and 4% Auxiliaries, they are percentages by weight.

[0032] Its preparation method comprises the following steps:

[0033] a. Put the polyol compound into a drying room or an oven to heat it into a liquid, and use dehydration equipment to dry and remove water so that the moisture content is less than 0.03%;

[0034] b. 18% solvent, 12% polyol compound (polyol compound with water content less than 0.03%), 5% diol chain extender and 4% auxiliary agent are added to the reactor in turn, fully stirred, Stirring temperature is controlled at 60°C;

[0035] c. Add 5% isocyanate into the reaction kettle of step b, control the temperature of the reaction system at 80° C., and the reaction time is 1 hour;

[0036] d. Add the remaining 2% diol chain extender and 20% solvent, stir evenly, and co...

Embodiment 3

[0041] It is a permanent antistatic polyurethane resin for leather, including 7% isocyanate, 15% polyol compound, 7% diol chain extender with a molecular weight below 150 and 71% solvent. They are by weight percentage.

[0042] Its preparation method comprises the following steps:

[0043] a. Put the polyol compound into a drying room or an oven to heat it into a liquid, and use dehydration equipment to dry and remove water so that the moisture content is less than 0.03%;

[0044] b. Add 25% solvent, 15% polyol compound (polyol compound with water content less than 0.03%) and 5% diol chain extender to the reaction kettle in turn, stir fully, and control the stirring temperature at 60 ℃;

[0045] c. Add 5% isocyanate into the reaction kettle of step b, control the temperature of the reaction system at 80° C., and the reaction time is 1.5 hours;

[0046] d. Add the remaining 2% diol chain extender and 20% solvent, stir evenly, and cool down to 60°C;

[0047] e. Add ...

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PUM

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Abstract

The invention relates to a permanent antistatic polyurethane resin for leather and a preparation method thereof. The preparation is characterized by comprising the following steps: putting a polyalcohol compound into a drying chamber or drying oven, and heating into a liquid until the water content is less than 0.03%; sequentially adding 15-20% of solvent, 12-18% of polyalcohol compound, 1.0-5.0% of dibasic alcohol chain extender, 0.0-5.0% of assistant and 0.0-1.0% of catalyst into a reaction kettle, and stirring while controlling the temperature at 30-60 DEG C; adding 3-5% of isocyanate into a reaction kettle, and reacting for 1-2 hours while controlling the temperature of the reaction system at 70-80 DEG C; adding the rest of dibasic alcohol chain extender and 10-18% of solvent, stirring uniformly, and cooling to 50-60 DEG C; adding 2-3% of isocyanate, and holding for 1-2 hours while controlling the temperature of the reaction system at 70-80 DEG C; and adding the rest of isocyanate and the rest of solvent to regulate the viscosity according to the viscosity condition of the system to finally control the viscosity at 50000-200000 cps / 25 DEG C. The compatibility of the polyurethane resin is further enhanced; and the polyurethane resin is slightly influenced by ambient humidity and has favorable antistatic effect.

Description

technical field [0001] The invention relates to a polyurethane resin for permanent antistatic leather and a preparation method thereof. Background technique [0002] At present, most of the antistatic technologies used in the polyurethane leather industry are to add antistatic agents to polyurethane. Since the antistatic agents are not compatible with polyurethane, the antistatic agents will gradually migrate to the leather surface. The antistatic agents rely on the surface to be absorbed by water Wetting, so as to dredge the static charge and reduce the resistivity of the leather surface; but after washing and abrasion, the antistatic agent gradually moves to the leather surface, and the antistatic agent gradually decreases and disappears. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a polyurethane resin for permanent antistatic leather with good antistatic effect and a preparation me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/42C08G18/64D06N3/14
CPCC08G18/12C08G18/4018C08G18/4202C08G18/4277C08G18/4854C08G18/6415C08G18/6607C08G18/7671D06N3/146D06N3/147D06N2209/046D06N2211/28C08G18/3206
Inventor 翁卓林息锁柱邓慕建祁永华
Owner 广东大盈新材料科技有限公司
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