A kind of non-yellowing polyurethane resin with low temperature resistance and abrasion resistance and superfine fiber synthetic leather prepared therefrom

A polyurethane resin, non-yellowing technology, applied in textiles and papermaking, etc., can solve the problems of precipitation, polyurethane weather resistance, poor aging resistance, etc.

Active Publication Date: 2021-11-05
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 non-yellowing polyurethane resin with low temperature resistance and abrasion resistance and the superfine fiber synthetic leather prepared therefrom. alcohols and hydrogenated hydroxyl-terminated polybutadiene. On the one hand, the siloxane structure is introduced into the branch chain of the obtained polyurethane resin, which is easy to gather on the surface after film formation, which greatly improves the wear resistance, and at the same time avoids the disadvantages of easy precipitation after adding. On the other hand, the main chain introduces hydrogenated polybutadiene, which is an elastomer structure with excellent low temperature resistance, thereby improving the low temperature folding resistance. In addition, the use of hydrogenated polybutadiene and non-aromatic diisocyanate in the main chain avoids the aging of active double bonds and ensures the non-yellowing of polyurethane resin. The ultra-fine fiber synthetic leather prepared by the invention has good low-temperature folding resistance and wear resistance, and meets the requirement of automotive leather for 50,000 folds at -30°C without cracks.

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 Patents(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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