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Anti-yellowing cationic water-based polyurethane leather finishing agent

A water-based polyurethane and leather finishing agent technology, applied in leather surface treatment, small raw hide/large raw hide/leather/fur treatment, small raw hide/large raw hide/leather hide/fur chemical treatment, etc. Yellowing, affecting the use value and other problems, to achieve the effect of reducing the yellowing index, improving the resistance to yellowing, and reducing the time of yellowing

Inactive Publication Date: 2015-05-13
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of yellowing caused by environmental factors during the use of traditional cationic water-based polyurethane finishing agents, which will affect the aesthetic effect of leather and further affect its use value, and provide a yellowing-resistant Cationic waterborne polyurethane leather finishing agent

Method used

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  • Anti-yellowing cationic water-based polyurethane leather finishing agent
  • Anti-yellowing cationic water-based polyurethane leather finishing agent
  • Anti-yellowing cationic water-based polyurethane leather finishing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The mass percentage of the raw material of each component that prepares cationic waterborne polyurethane is as follows:

[0044] PPG: 47.1%; IPDI: 38.22%; antioxidant GA-80: 0.49%; anti-ultraviolet absorber UV-1577: 0.49%; crosslinking agent TMP: 1.88%; chain extender BDO: 2.26%; catalyst dibutyltin Dilaurate: 0.157%; emulsifier N-MDEA: 4.7%; neutralizer glacial acetic acid: 4.7%;

[0045] Synthesis of a yellowing-resistant cationic waterborne polyurethane leather finishing agent:

[0046] Add 30g of PPG into a container with mechanical stirring, thermometer and condenser, stir and dehydrate under vacuum at 90°C for 30min, cool down to 50°C and add 24.36g of IPDI, 0.315g of antioxidant GA80 and 0.315g of anti-ultraviolet absorber UV-1577, React at a constant temperature of 90°C for 2 hours; then add 1.20g of TMP and 1.44g of BDO for chain extension reaction, add acetone to dilute, then add 0.1g of catalyst dibutyltin dilaurate, react at a constant temperature of 85°C f...

Embodiment 2

[0052]The mass percentage of the raw material of each component that prepares cationic waterborne polyurethane is as follows:

[0053] PPG: 51.6%; HDI: 28.69%; antioxidant GA-80: 0.91%; anti-ultraviolet absorber UV-1164: 0.91%; crosslinking agent TMP: 1.73%; chain extender BDO: 7.42%; catalyst dibutyltin Dilaurate: 0.144%; emulsifier N-MDEA: 4.32%; neutralizer glacial acetic acid: 4.32%;

[0054] Synthesis of a yellowing-resistant cationic waterborne polyurethane leather finishing agent:

[0055] Add 35.80g of PPG into a container with mechanical stirring, thermometer and condenser, stir and dehydrate under vacuum at 90°C for 30min, cool down to 50°C and add 19.92g of HDI, 0.63g of antioxidant GA80 and 0.63g of anti-ultraviolet absorber UV-1164 , 90°C constant temperature reaction for 2h; then add 1.20g TMP and 0.054gBDO for chain extension reaction, add acetone to dilute, then add 0.1g catalyst dibutyltin dilaurate, 85°C constant temperature reaction for 2h; then cool down t...

Embodiment 3

[0061] The mass percentage of the raw material of each component that prepares cationic waterborne polyurethane is as follows:

[0062] PTMG: 29.58%; HDI: 47.48%; antioxidant 1010: 1.76%; anti-ultraviolet absorber UV-1577: 1.76%; crosslinking agent N303: 5.05%; chain extender PG: 2.28%; catalyst dibutyltin dilaurel Ester: 0.281%; emulsifier PDEA: 6.17%; neutralizer glacial acetic acid: 5.61%;

[0063] Synthesis of a yellowing-resistant cationic waterborne polyurethane leather finishing agent:

[0064] Add 15.81g of PTMG into a container with mechanical stirring, thermometer and condenser, stir and dehydrate under vacuum at 90°C for 30min, cool down to 50°C and add 25.38g of HDI, 0.945g of antioxidant 1010 and 0.945g of anti-ultraviolet absorber UV-1577 , 90°C constant temperature reaction for 2 hours; then add 2.70g N303 and 1.22g PG for chain extension reaction, add acetone to dilute, then add 0.15g catalyst dibutyltin dilaurate, 85°C constant temperature reaction for 2h; th...

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Abstract

The invention relates to an anti-yellowing cationic water-based polyurethane leather finishing agent, and belongs to the technical field of textile chemicals. The anti-yellowing cationic water-based polyurethane leather finishing agent is prepared by using polyalcohol, aliphatic diisocyanate, diethanol amine and a cross-linking agent as raw materials to synthesize cationic water-based polyurethane, and adding an antioxidant and an uvioresistant absorbent for modifying the cationic water-based polyurethane. The prepared cationic water-based polyurethane finishing agent has the advantages of high stability, yellowing resistance and the like.

Description

technical field [0001] The invention relates to a yellowing-resistant cationic water-based polyurethane leather finishing agent, which belongs to the technical field of textile chemicals. Background technique [0002] Waterborne polyurethane refers to a polyurethane emulsion formed by dissolving or dispersing polyurethane in water. It uses water as the dispersion medium and has the advantages of non-combustibility, no pollution to the environment and low production cost. At the same time, it combines the advantages of polyurethane materials with the low VOC content of water-based materials, so its development and production have been widely valued by countries all over the world. , has been widely used in coatings, adhesives, leather, ink, printing and dyeing and other industries. [0003] Cationic waterborne polyurethane has unique properties due to the structure of quaternary ammonium salt in its skeleton. Cationic waterborne polyurethane has a certain dustproof effect, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C14C11/00C08G18/66C08G18/48C08G18/32C08G18/10
CPCC09D175/08C08G18/10C08G18/3206C08G18/4825C08G18/4854C08G18/6674C08L2201/08C09D7/63C14C11/006D06M15/568
Inventor 葛震罗运军娄玉桃黄超梁柱
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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