Self-delustering soft waterborne polyurethane leather finishing agent and preparation method thereof

A polyurethane leather and water-sensitive technology, which is applied in the field of self-dulling soft-feeling water-based polyurethane leather finishing agent and preparation, can solve the problems of unsatisfactory solvent resistance and lack of delicate hand feeling, and achieve good weather resistance and soft and smooth touch , the effect of low production cost

Active Publication Date: 2017-02-22
LIAONING FIXED STAR FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the water-based polyurethane with a linear molecular structure is not ideal in terms of water resistance, wear resistance, solvent resistance, etc., and it is not close to the delicate feel of leather.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Preparation:

[0047] 1. Prepolymerization reaction: Hydrogenated diphenylmethane diisocyanate 30, hexamethylene diisocyanate trimer 20, linear bishydroxyalkyl siloxane 15, polypropylene carbonate diol 30, polyethylene oxide Add alkanediol 50, 2,2,4-trimethyl-1,3-pentanediol 4, and dimethylolbutyric acid 2 into the reaction kettle, raise the temperature to 70°C, and react for 6 hours;

[0048] 2. Neutralization reaction: cool down the temperature of the above prepolymer to 50°C, add triethylamine 1.4, and react for 35 minutes;

[0049] 3. Chain extension reaction: add deionized water 608, add hydrazine hydrate 4.6 after high-speed dispersion, continue to stir, raise the temperature to 50°C, and react for 2 hours to obtain the product. The appearance of the product is translucent and the solid content is 20.2%.

[0050] Because the product of this embodiment has more hexamethylene diisocyanate trimers, the degree of crosslinking of the product is improved, resulting in ...

Embodiment 2

[0052]1. Prepolymerization reaction: Hydrogenated diphenylmethane diisocyanate 35, hexamethylene diisocyanate trimer 15, linear bishydroxyalkyl siloxane 5, polypropylene carbonate diol 50, polyethylene oxide Add alkanediol 45, 2,2,4-trimethyl-1,3-pentanediol 5, and dimethylol butyric acid 2 into the reaction kettle, raise the temperature to 80°C, and react for 5 hours;

[0053] 2. Neutralization reaction: cool down the temperature of the above prepolymer to 50°C, add triethylamine 1.4, and react for 35 minutes;

[0054] 3. Chain extension reaction: Add deionized water 637, add hydrazine hydrate 4.8 after high-speed dispersion, continue to stir and heat up to 55°C, and react for 1.5 hours to obtain the product. The appearance of the product is translucent and the solid content is 20.1%.

[0055] The product of this example has a large proportion of 2,2,4-trimethyl-1,3-pentanediol and dimethylol butyric acid in the ratio of raw materials, and a small amount of dimethylol butyric...

Embodiment 3

[0057] Preparation:

[0058] 1. Prepolymerization reaction: Hydrogenated diphenylmethane diisocyanate 40, hexamethylene diisocyanate trimer 10, linear bishydroxyalkyl siloxane 10, polypropylene carbonate diol 60, polyethylene oxide Add alkanediol 40, 2,2,4-trimethyl-1,3-pentanediol 3, and dimethylol butyric acid 3 into the reaction kettle, raise the temperature to 85°C, and react for 4.5 hours;

[0059] 2. Neutralization reaction: cool the above prepolymer to 55°C, add triethylamine 2, and react for 30 minutes;

[0060] 3. Chain extension reaction: Add deionized water 686, add hydrazine hydrate 5 after high-speed dispersion, continue to stir and heat up to 55°C, and react for 1.5 hours to obtain the product. The appearance of the product is translucent, and the solid content is 19.8%.

[0061] The product of this embodiment selects more polypropylene carbonate diol and polyethylene oxide diol in the raw material ratio, the crystallinity is improved, the matting property of fi...

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PUM

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Abstract

The invention discloses self-delustering soft waterborne polyurethane leather finishing agent and a preparation method thereof. Raw materials are matched by weight: (1) adding 30-50 parts of 4, 4'-dicyclohexylmthane diisocyanate, 5-20 parts of hexamethylene diisocyanate, 5-20 parts of linear double hydroxyalkyl siloxane, 30-60 parts of poly propylene carbonate diol, 30-50 parts of polyethylene oxide diol, 3-5 parts of 2, 2, 4-trimethyl-1, 3 pentanediol and 2-4 parts of dimethylolbutyric acid into a reaction kettle, heating to 70-90 DEG C and reacting for 4-6 hours; (2) cooling to 50-60 DEG C, adding 1-3 parts of triethylamine and reacting for 25-35 minutes; (3) adding 430-850 parts of deionized water, adding 4-6 parts of hydrazine hydrate after high-speed dispersion, stirring, heating to 50-60 DEG C and reacting for 1-2 hours. The product not only has good delustering and softness, but also has excellent abrasion resistance and solvent resistance.

Description

technical field [0001] The invention relates to a water-based polyurethane leather finishing agent and a preparation method, in particular to a self-dulling soft-touch water-based polyurethane leather finishing agent and a preparation method. Background technique [0002] With the development of society, people pay more and more attention to environmental protection. Traditional polyurethane leather finishing agents are mostly solvent-based polyurethane, which seriously pollutes the environment. Water-based solvent-free products have no pollution to the environment and no harm to the human body, so water-based polyurethane replaces solvents. Type polyurethane has become an inevitable trend. [0003] The matting water-based polyurethane leather finishing agent is divided into two kinds of water-based polyurethane leather finishing agents: adding matting agent and self-dulling agent. At present, both the matting agent and the existing self-dulling water-based polyurethane lea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/44C08G18/48C08G18/66C08G18/38C08G18/32C08G18/34C08G18/75C08G18/73C09D175/04C09D175/08C14C11/00
CPCC08G18/3206C08G18/348C08G18/3893C08G18/4018C08G18/44C08G18/4825C08G18/4833C08G18/6607C08G18/6625C08G18/6629C08G18/73C08G18/758C09D175/04C09D175/08C14C11/006
Inventor 党瑞东唐丽宁佳宝陈龙陈剑冰冷璐荣星
Owner LIAONING FIXED STAR FINE CHEM
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