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Delustering waterborne polyurethane leather finishing agent and preparation method thereof

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. Problems such as the compactness of emulsion film formation and the influence of film performance, to achieve low surface tension, excellent matting effect, and the effect of being suitable for large-scale production

Active Publication Date: 2016-04-20
优美特(北京)环境材料科技股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, the stability of the emulsion containing large-grained emulsion particles is poor;

Method used

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  • Delustering waterborne polyurethane leather finishing agent and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A kind of preparation method of matting type waterborne polyurethane leather finishing agent, comprises the steps:

[0059] Weigh 21.632g of aminopropyl polydimethylsiloxane and 10.816g of PEG, add them into the flask, and vacuumize at 100°C for 1h to remove water. The temperature was lowered to 40°C, 8.7g TDI and 3 drops of T12 were added, and the temperature was raised to 90°C for 4h. Cool down to 50°C, add 20g of acetone and 2.255g of DMPA, raise the temperature to 70°C, and react for 2 hours. After the temperature drops to about 10°C, pour the product into a beaker, quickly add 1.700g of triethylamine and 150.3g of water at a stirring speed of 1000r / min, and emulsify at a speed of 3000r / min for 5min. The acetone was removed by rotating the emulsion at 36°C to obtain a matte water-based polyurethane leather finishing agent.

Embodiment 2

[0061] A kind of preparation method of matting type waterborne polyurethane leather finishing agent, comprises the steps:

[0062] Weigh 26.826g of hydroxyl-terminated polydimethylsiloxane and 6.67g of PPG1000, add them into the flask, and vacuumize at 90°C for 2h to remove moisture. Lower the temperature to 60°C, add 8.433g TDI and 5 drops of T12, and react at 85°C for 3h. Cool down to 45°C, add 30g of acetone and 2.3g of DMPA, raise the temperature to 65°C, and react for 4 hours. After the temperature dropped to about 5°C, pour the product into a beaker, quickly add 1.734g triethylamine and 153.9g water at a stirring speed of 1000r / min, and emulsify at a speed of 3000r / min for 5min. The acetone was removed by rotating the emulsion at 36°C to obtain a matte water-based polyurethane leather finishing agent.

Embodiment 3

[0064] A kind of preparation method of matting type waterborne polyurethane leather finishing agent, comprises the steps:

[0065] Weigh 28.91g of silanol-based polydimethylsiloxane and 4.818g of PTMG, add them into the flask, and vacuumize at 110°C for 1 hour to remove moisture. Lower the temperature to 85°C, add 8.242g HDI and 5 drops of T12, and react for 4h. Cool down to 40°C, add 25g of acetone and 2.3g of DMPA, raise the temperature to 65°C, and react for 4 hours. After the temperature drops to about 15°C, pour the product into a beaker, quickly add 1.734g triethylamine and 107.3g water at a stirring speed of 1000r / min, and emulsify for 5min at a rotating speed of 2000r / min. The acetone was removed by rotating the emulsion at 36°C to obtain a matte water-based polyurethane leather finishing agent.

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Abstract

The invention provides a delustering waterborne polyurethane leather finishing agent and a preparation method thereof. The delustering waterborne polyurethane leather finishing agent is mainly prepared from diisocyanate, polyether glycol, organosiloxane, a hydrophilic chain extender, a catalyst and a neutralizer. According to the delustering waterborne polyurethane leather finishing agent, the specific raw material composition and dosage are adopted, and an excellent delustering effect is obtained without adding a delusterant. The delustering waterborne polyurethane leather finishing agent is good in compactness, stability and coating property, can guarantee the mechanical property and waster resistance of a leather coating and is environmentally friendly, nontoxic and safe. The preparation method of the delustering waterborne polyurethane leather finishing agent is simple in technology, the waterborne polyurethane leather finishing agent with an excellent delustering property is synthesized in a step-by-step feeding reaction mode, and the preparation method is suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of leather chemicals, in particular to a matting water-based polyurethane leather finishing agent and a preparation method thereof. Background technique [0002] Low-gloss leather finishing agent is a hot spot in leather finishing research nowadays, which can make the appearance of artificial synthetic leather closer to genuine leather. [0003] The use of a matting agent can achieve the expected matting effect, but the use of a matting agent will lead to a decrease in the stability of the system, affecting the scratch resistance and bending resistance of the film, and the addition of a matting agent will generate additional costs. The bulk matting water-based polyurethane can overcome the above defects. [0004] Traditional matting leather finishing agents currently mainly use the method of adding silica matting powder to polyurethane to achieve matting performance. For example, the invention patent CN101...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/568C14C11/00C08G18/48C08G18/61C08G18/75C08G18/76
CPCC08G18/4825C08G18/4841C08G18/4854C08G18/61C08G18/755C08G18/7614C14C11/006D06M15/568
Inventor 张建森葛震郝伟罗运军
Owner 优美特(北京)环境材料科技股份公司
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