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Low-temperature-resistant and wear-resistant non-yellowing polyurethane resin and ultrafine fiber synthetic leather prepared from same

A polyurethane resin, non-yellowing technology, applied in the field of polyurethane resin and non-yellowing polyurethane, can solve the problems of precipitation, poor weather resistance and aging resistance of polyurethane, and achieve reduced crystallinity, excellent aging resistance, and avoidance of The effect of reducing the low temperature folding resistance

Active Publication Date: 2020-04-03
HUAFON MICROFIBER SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Patent reports on wear-resistant and low-temperature resistant polyurethane resins, for example: a high wear-resistant, low-temperature resistant, bending-resistant, and hydrolysis-resistant polyurethane surface layer resin (patent application number: 201510411756.X), patented by adding organic silicon Additives are used to improve wear resistance, and there is a risk of precipitation; a wear-resistant and cold-resistant polyurethane resin and its preparation method and application (patent application number: 201610387983.8), the patent uses conventional raw materials, and the prepared polyurethane has poor weather resistance and aging resistance , not suitable for automotive applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Polycarbonate diol (UH-200) 130g (molecular weight 2000), poly 3-methyltetrahydrofuran diol 15g (molecular weight 2000), dihydroxy silicone oligomer (Silok8866) 20g (molecular weight 4500), hydrogenated terminal Mix 20g of hydroxyl polybutadiene (molecular weight: 2000) and 100g of N,N dimethylformamide at 55°C; then add 44.1g of 4,4'-dicyclohexylmethane diisocyanate, raise the temperature to 70°C, and react for 0.5 hours ,

[0046] Add 0.01g organic bismuth catalyst, raise the temperature to 110°C, and react for 3 hours;

[0047] Add 251.5g of N,N dimethylformamide and 221g of toluene, cool down to below 50°C, add 17.6g of 4,4-diaminodicyclohexylmethane dropwise to increase viscosity;

[0048] When the viscosity reaches 80PaS / 25°C, stop the dropwise addition, add 0.8g of single-ended aminosiloxane to terminate the reaction, and keep it warm for 1 hour to obtain the non-yellowing polyurethane resin with a mass solid content of 30%.

Embodiment 2

[0050] Polycarbonate diol (UH-200) 110g (molecular weight 2000), dihydroxy silicone oligomer (Silok8866) 20g (molecular weight 4500), hydrogenated hydroxyl-terminated polybutadiene 30g (molecular weight 2000) and N, N two Mix 100g of methylformamide at 50°C; then add 58.2g of 4,4'-dicyclohexylmethane diisocyanate, raise the temperature to 70°C, and react for 0.5 hours.

[0051] Add 0.02g organic bismuth catalyst, raise the temperature to 100°C, and react for 3 hours;

[0052] Add 249g of N,N dimethylformamide and 233g of toluene, lower the temperature to below 50°C, and add 31g of 4,4-diaminodicyclohexylmethane dropwise to increase the viscosity;

[0053] When the viscosity reaches 100PaS / 25°C, stop the dropwise addition, add 1g of single-ended aminosiloxane to terminate the reaction, and keep it warm for 1 hour to obtain the non-yellowing polyurethane resin with a mass solid content of 30%.

Embodiment 3

[0055] Polycarbonate diol (UH-200) 130g (molecular weight 2000), poly 3-methyltetrahydrofuran diol 30g (molecular weight 2000), dihydroxy silicone oligomer (Silok8866) 30g (molecular weight 4500), hydrogenated terminal 20g of hydroxyl polybutadiene (molecular weight 2000) and 100g of N,N dimethylformamide were mixed at 50°C; then 42.2g of isophorone diisocyanate was added, the temperature was raised to 70°C, and the reaction was carried out for 0.5 hours.

[0056] Add 0.04 organic bismuth catalyst, raise the temperature to 90°C, and react for 2 hours;

[0057]Add 282g of N,N dimethylformamide and 241g of toluene, cool down to below 50°C, add 16.1g of isophoronediamine dropwise to increase the viscosity;

[0058] When the viscosity reaches 120PaS / 25°C, stop the dropwise addition, add 1.8g of single-ended aminosiloxane to terminate the reaction, and keep it warm for 1 hour to obtain the non-yellowing polyurethane resin with a mass solid content of 30%.

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PUM

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Abstract

The invention discloses a low-temperature-resistant and wear-resistant yellowing-free polyurethane resin and an ultrafine fiber synthetic leather prepared from the same. The polyurethane resin is formed by adopting polycarbonate polyol as a main component and introducing organosilicon polyol with a special structure and hydrogenated hydroxyl-terminated polybutadiene. A siloxane structure is introduced into the branched chain of the obtained polyurethane resin, and can easily gather on the surface after film formation, so the wear resistance is greatly improved, and the defect of easy separation caused by later addition is avoided; the hydrogenated polybutadiene introduced into the main chain is of an elastomer structure with excellent low-temperature resistance, so that the low-temperaturefolding resistance is improved. The use of the hydrogenated polybutadiene and non-aromatic diisocyanate in the main chain avoids the aging of active double bonds, so the yellowing resistance of the polyurethane resin is ensured. The ultrafine fiber synthetic leather prepared in the invention has good low-temperature folding resistance and good wear resistance, and meets the requirements of automobile leather on no cracks after being folded at -30 DEG C for 50000 times.

Description

technical field [0001] The invention relates to a polyurethane resin, in particular to a low-temperature-resistant and wear-resistant non-yellowing polyurethane for ultrafine fiber synthetic leather, which belongs to the technical field of polyurethane ultrafine fiber synthetic leather. Background technique [0002] Island-in-the-sea microfiber synthetic leather is divided into suede leather and veneer leather. Microfiber veneer leather is a composite material composed of polyurethane coating and microfiber base cloth. Generally, the performance of polyurethane coating resin has a great impact on The quality of the entire synthetic leather plays a vital role, especially in severe cold seasons or regions, which also put forward higher requirements for hand feel and physical properties. [0003] For conventional shoe leather, garment leather, automobile leather, etc., if the folding resistance is not good under severe cold conditions, this seriously affects its service life. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/32C08G18/12C08G18/40C08G18/44C08G18/48C08G18/61C08G18/62D06N3/00D06N3/14
CPCC08G18/12C08G18/4018C08G18/4063C08G18/44C08G18/4854C08G18/61C08G18/6208C08G18/6618C08G18/664D06N3/0004D06N3/146D06N3/147D06N2209/103D06N2209/1685D06N2209/1692D06N2211/28C08G18/3234
Inventor 杜明兵张其斌孙向浩杨银龙
Owner HUAFON MICROFIBER SHANGHAI
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