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Leather finishing agent capable of enhancing mechanical properties and ultraviolet resistance of leather and preparation method of leather finishing agent

A technology of leather finishing agent and mechanical properties, which is applied in small raw hide/large raw hide/leather/fur treatment, small raw hide/large raw hide/leather hide/fur chemical treatment, leather surface treatment, etc., which can solve the problem of long preparation time of finishing agent , leather single performance improvement, complex preparation process and other problems, to achieve the effect of green preparation method, low production cost, high preparation reaction efficiency

Active Publication Date: 2020-12-04
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, among the many leather finishing agents disclosed at present, most of them are to improve the single performance of leather. To realize the multi-performance improvement of the finishing agent on leather, it is necessary to add other functional chemical raw materials in the preparation process of the finishing agent. , or prepare multifunctional leather finishing products through multi-step reactions
As a result, the preparation time of the coating agent will be longer, the cost will be greatly increased, and the preparation process will become more complicated.

Method used

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  • Leather finishing agent capable of enhancing mechanical properties and ultraviolet resistance of leather and preparation method of leather finishing agent
  • Leather finishing agent capable of enhancing mechanical properties and ultraviolet resistance of leather and preparation method of leather finishing agent
  • Leather finishing agent capable of enhancing mechanical properties and ultraviolet resistance of leather and preparation method of leather finishing agent

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Effect test

Embodiment 1

[0031] A preparation method of a leather finishing agent capable of enhancing leather mechanical properties and UV resistance, comprising the following steps:

[0032] (1) add reaction raw material gallic acid 1kg in reactor, add the acetic acid of 5kg, obtain gallic acid acid liquid;

[0033] (2) Add 1 part of reaction auxiliary hexamethylenetetramine to the gallic acid solution, raise the reaction temperature to 100° C., and react for 0.5 hours to obtain the reaction solution;

[0034] (3) After reducing the temperature of the reaction solution to 50° C., add 10 kg of distilled water and hydrolyze for 0.5 hour to obtain the leather finishing agent.

[0035] The leather finishing agent is used as the finishing process of tanned leather (taking condensed tanning agent vegetable tanned leather as an example), and the properties of the leather after finishing are characterized. Take a 10mm wide and 50mm leather test sample after finishing, and use a multifunctional tensile mach...

Embodiment 2

[0038] A preparation method of a leather finishing agent capable of enhancing leather mechanical properties and UV resistance, comprising the following steps:

[0039] (1) Add 1 kg of reaction raw material catechin in the reactor, add the trifluoroacetic acid of 8 kg, obtain catechin acid liquid;

[0040] (2) Add 2 kg of reaction auxiliary hexamethylenetetramine to the catechin acid solution, raise the reaction temperature to 90° C., and react for 1.5 hours to obtain the reaction solution;

[0041] (3) After reducing the temperature of the reaction solution to 40° C., add 12 kg of distilled water and hydrolyze for 0.5 hour to obtain the leather finishing agent.

[0042] The leather finishing agent is used in the finishing process of tanned leather (taking chrome tanned leather as an example), and the properties of the leather after tanning are characterized. Take a 10mm wide and 50mm leather test sample after finishing, and use a multifunctional tensile machine to measure its...

Embodiment 3

[0045] A preparation method of a leather finishing agent capable of enhancing leather mechanical properties and UV resistance, comprising the following steps:

[0046] (1) add reaction raw material tannic acid 1kg in reactor, add the polyphosphoric acid of 10kg, obtain tannic acid acid liquid;

[0047] (2) Add 3 kg of reaction aid hexamethylenetetramine to the tannic acid solution, raise the reaction temperature to 80° C., and react for 2 hours to obtain the reaction solution;

[0048] (3) After reducing the temperature of the reaction solution to 30° C., add 20 kg of distilled water and hydrolyze for 1 hour to obtain the leather finishing agent.

[0049] The leather finishing agent is used as the finishing process of tanned leather (take hydrolyzed tanning agent vegetable tanned leather as an example), and the properties of the leather after finishing are characterized. Take a 10mm wide and 50mm leather test sample after finishing, and use a multifunctional tensile machine t...

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Abstract

The invention discloses a leather finishing agent capable of enhancing mechanical properties and ultraviolet resistance of leather and a preparation method of the leather finishing agent, and belongsto the field of preparation of leather assistants. Polyphenolic substances are used as raw materials, hexamethylenetetramine is used as an auxiliary agent, protonic acid is used as a solvent, and after heating reaction, water is added for hydrolytic dispersion to obtain the product. The method is low in production cost, simple in process, high in preparation efficiency and environmentally friendlyin production process, and the prepared leather finishing agent can be used for a finishing workshop section after leather tanning. The mechanical properties of the finished leather are obviously enhanced, and the ultraviolet resistance of the leather is also obviously improved.

Description

technical field [0001] The invention relates to the field of preparation of leather auxiliary agents, in particular to a leather finishing agent capable of enhancing leather mechanical properties and ultraviolet resistance and a preparation method thereof. Background technique [0002] With the development of social economy, people's living standards have been gradually improved. Leather products are deeply loved by the public for their soft feel, natural appearance lines, strong wear resistance and aging resistance. In order to achieve these excellent properties of leather products, leather finishing agents play an important role. As a common leather auxiliary agent, leather finishing agent is mainly used for leather surface coating protection and leather beautification. It is prepared from film-forming substances, coloring materials, solvents and auxiliary agents in a certain proportion. Leather finishing agent is mainly used for the modification of leather. Through the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/00C14C11/00
CPCC09D5/00C14C11/00C14C11/003C09D5/32C09D129/02
Inventor 强涛涛郭林新马养民代婷婷
Owner SHAANXI UNIV OF SCI & TECH