Self-emulsifying wet rubbing resistant leather top layer coating agent and preparation method thereof

A self-emulsifying, finishing agent technology, used in fiber processing, textiles and papermaking, etc., can solve the problems of low overall performance, unstable wet rub resistance, hindering the water vapor permeability of leather, and achieve a soft hand feel and excellent rub resistance. The effect of wet performance and excellent water vapor permeability

Active Publication Date: 2013-05-15
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently developed scratch-resistant wet-type leather finishing agents have unstable wet-scratch resistance, and hinder the water vapor permeability of the leather, and the overall performance is not high.

Method used

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  • Self-emulsifying wet rubbing resistant leather top layer coating agent and preparation method thereof
  • Self-emulsifying wet rubbing resistant leather top layer coating agent and preparation method thereof
  • Self-emulsifying wet rubbing resistant leather top layer coating agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 12 grams of gelatin (accounting for 11.76% of the total mass) and 85 grams of deionized water into a three-neck reaction flask equipped with a thermometer socket, a sampling port, and a condenser socket, stir and heat to 65 °C, and after the gelatin is completely dissolved, add 0.5 mL, 3 mol / liter of sodium hydroxide, adjust the reaction pH to be 9.0, add 5.0g sodium lauryl sulfate, sodium dodecylbenzenesulfonate and sorbitol mixed surfactant (wherein sodium lauryl sulfate 55% (w / w), sodium dodecylbenzenesulfonate 20% (w / w), sorbitol 25% (w / w)) as an emulsifier (4.90% of the total mass), continue After stirring until the emulsifier is completely dissolved, add epoxy polysiloxane (Mw=1000) continuously or in batches, the reaction starts, and the content of primary amino groups in the system does not change after 24 hours of reaction, so stop stirring and heating.

[0035] The dissolution rate of the product in deionized water is 43%. The dissolution rate of the prod...

Embodiment 2

[0045] Add 12 grams of gelatin (accounting for 11.76% of the total mass) and 85 grams of deionized water into a three-neck reaction flask equipped with a thermometer socket, a sampling port, and a condenser socket, stir and heat to 65 °C, and after the gelatin is completely dissolved, add 0.5 mL, 3 mol / liter of sodium hydroxide, adjust the reaction pH to be 9.0, add 5.0g sodium dodecyl sulfate, sodium dodecylbenzenesulfonate and sorbitol mixed surfactant (wherein dodecylsulfonic acid Sodium is 55% (w / w), sodium dodecylbenzenesulfonate is 20% (w / w), sorbitol is 25% (w / w)) as an emulsifier (4.90% of the total mass), Continue to stir until the emulsifier is completely dissolved, then add epoxy polysiloxane (Mw=1000) continuously or in batches, the reaction starts, and the content of primary amino groups in the system does not change after 24 hours of reaction, so stop stirring and heating.

[0046] Take 10.0 grams of prepared modified gelatin, add 10 mL of a mixed solvent of abso...

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Abstract

The invention relates to a self-emulsifying wet rubbing resistant leather top layer coating agent and a preparation method of the self-emulsifying wet rubbing resistant leather top layer coating agent. The wet rubbing resistant leather top layer coating agent is formed by mixing the following raw materials: epoxy polysiloxane modified gelatin, solvent absolute ethyl alcohol and acetone, wherein the volume ratio of the absolute ethyl alcohol to the acetone is 3:7; and the proportion of the using amount of the epoxy polysiloxane modified gelatin to the solvent is 1g / ml. The structural formula of the epoxy polysiloxane modified gelatin is that FORMUAL, wherein n is an integer from 7 to 50. Compared with the prior art, the self-emulsifying wet rubbing resistant leather top layer coating agent is extremely high in wet rubbing resistance; and after being coated on leather, soft handfeel and high water steam permeation performance can be achieved.

Description

Technical field: [0001] The invention relates to a leather finishing agent and a preparation method thereof, in particular to a self-emulsifiable leather top-coat finishing agent, in particular to a self-emulsifying, wet rub-resistant, organic solvent-resistant, and oxidation-resistant leather top-coat finishing agent. method. Background technique: [0002] At present, wet-scratch-resistant leather top-coat finishing agents in the synthetic leather market have become a popular trend in the future, and are widely used in clothing, car accessories, and luggage products. [0003] After the general leather top coating is applied to the leather, it needs to be prepared by adding other reagents and emulsifiers after emulsification. However, the self-emulsifying wet rub-resistant leather top coating is different. It is mainly composed of gelatin and epoxy polysiloxane monomers. Synthesized with surfactants, after the gelatin material is prepared, it forms latex particles with a co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/15D06M15/643C08H1/00C08G81/00
Inventor 许静李天铎夏永梅李静孙照玲
Owner QILU UNIV OF TECH
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