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Polyurethane resin used for skin-imitated superfine fiber synthetic leather, and preparation method thereof

A technology of polyurethane resin and microfiber, which is applied in the direction of textiles and papermaking, can solve the problems that are difficult to meet the color and feel of synthetic leather, uneven dyeing, poor color matching between fiber and resin, etc., and achieve bright colors, uniform colors, soft touch effect

Inactive Publication Date: 2011-10-12
HUADA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the disadvantages of polyurethane resins for synthetic leather on the market, such as poor dyeability, poor color homochromaticity between fibers and resins, uneven dyeing, and poor resilience, and it is difficult to meet the color and feel requirements of synthetic leathers in high-end fields such as decorative leather and garment leather. Insufficient, provide a kind of polyurethane resin for imitation leather superfine fiber synthetic leather and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Raw material name Mass (kg)

[0020] P-1 (polytetrahydrofuran ether glycol with a molecular weight of 2000) 1724

[0021] MDI (4,4’-diphenylmethane diisocyanate) 910.3

[0022] EG (ethylene glycol) 167

[0023] 1,4-Butanediol 4.5

[0024] Antioxidant BHT 3.0

[0025] Methanol 5.4

[0026] Silicone surfactant SF-193 27

[0027] N,N-Dimethylformamide 6670

[0028] The polyurethane resin for artificial skin superfine fiber synthetic leather according to the present invention is prepared according to the following process:

[0029] Put the measured polytetrahydrofuran ether glycol, ethylene glycol, 1,4-butanediol, antioxidant BHT and 1334kg of N,N-dimethylformamide into the reactor in sequence. Stir at 40~50℃ for 40min, then put in MDI, control the temperature at 75~80℃ to react. With the progress of the reaction, the viscosity of the system increased, and 4002kg of N,N-dimethylformamide was diluted in four equal amounts. When the viscosity of the system reached the specified value, me...

Embodiment 2

[0031] Raw material name Mass (kg)

[0032] P-1 (Polytetrahydrofuran ether with molecular weight 2000) 1158

[0033] P-2 (Polycaprolactone with a molecular weight of 2000) 940

[0034] MDI (4,4’-diphenylmethane diisocyanate) 1132

[0035] EG 216

[0036] Antioxidant BHT 3.0

[0037] Methanol 5.4

[0038] Silicone surfactant SF-193 27

[0039] N,N-Dimethylformamide 8120

[0040] The polyurethane resin for artificial skin superfine fiber synthetic leather according to the present invention is prepared according to the following process:

[0041] Put the measured polyester polyol, polyether polyol, ethylene glycol, antioxidant BHT and 1624kg of N,N-dimethylformamide into the reactor in turn. Stir at 40~50℃ for 1hr, then put in MDI, control the temperature at 75~80℃ for reaction. As the reaction progressed, the viscosity of the system increased, and 4872 kg of N,N-dimethylformamide was diluted in five equal portions. When the system viscosity reached the specified value, methanol and 1624kg o...

Embodiment 3

[0043] Raw material name Mass (kg)

[0044] P-1 (Polytetrahydrofuran ether with a molecular weight of 2000) 1865

[0045] MDI (4,4’-diphenylmethane diisocyanate) 898

[0046] EG 156

[0047] Ethylenediamine 10

[0048] Antioxidant BHT 3.0

[0049] N-butanol 4.1

[0050] Silicone surfactant SF-193 21

[0051] N,N-Dimethylformamide 6700

[0052] The polyurethane resin for artificial skin superfine fiber synthetic leather according to the present invention is prepared according to the following process:

[0053] Put the measured polyether polyol, ethylene glycol, ethylenediamine, antioxidant BHT and 1340kg of N,N-dimethylformamide into the reactor in sequence, stir for 1hr at 40~50℃, and divide into three times Invest in MDI. Control the temperature at 60 to 70°C for the reaction. As the reaction progressed, the viscosity of the system increased, and 4020kg of N,N-dimethylformamide was added in four equal amounts. When the system viscosity reaches the specified value, add n-butanol and 1340...

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PUM

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Abstract

The invention relates to polyurethane resin used for skin-imitated superfine fiber synthetic leather, and a preparation method thereof. The polyurethane resin used for skin-imitated superfine fiber synthetic leather is prepared from the following raw materials in percentage by weight: 6-10% of isocyanate, 16-22% of polyol compound, 1-3% of chain extender, 0.03-0.1% of terminator, 0.2-0.5% of auxiliary agent and 69-71% of N,N-dimethyl formamide. The polyurethane resin used for skin-imitated superfine fiber synthetic leather provided by the invention solves the problems that existing polyurethane resin used for napped leather has poor dyeing performance and poor rebound resilience; and the skin-imitated superfine fiber synthetic leather prepared using the polyurethane resin has the advantages of bright and uniform color, soft touch feeling, high elasticity and the like, has a touch feeling of similar skin, and can be used as decorative leather, garment leather and shoe leather.

Description

Technical field [0001] The invention relates to a polyurethane resin and a preparation method thereof, in particular to a polyurethane resin for artificial skin superfine fiber synthetic leather and a preparation method thereof. Background technique [0002] Microfiber synthetic leather, especially suede leather, has very high requirements for color and feel. It requires delicate and clear color, soft, plump and good drape, as well as good breathability and moisture permeability. At present, polyurethane resins for synthetic leather on the market have disadvantages such as poor dyeability, poor homochromaticity of fibers and resins, uneven dyeing, and poor resilience. It is difficult to meet the requirements of high-end synthetic leather such as decorative leather and clothing leather for color and feel. Summary of the invention [0003] The present invention is aimed at the disadvantages of poor dyeability, poor homochromaticity of fiber and resin, uneven dyeing, and poor resilie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/42D06N3/14
Inventor 韩永进夏清玲刘少勇
Owner HUADA CHEM GRP CO LTD
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