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A kind of leather finishing agent and preparation method thereof

A leather finishing agent and monomer technology, which is used in leather surface treatment, small raw hide/large raw hide/leather/fur treatment, coating, etc., can solve the problem of limiting the wide application of leather finishing agent, and achieve a soft and supple hand. properties and water resistance, and the effect of improving flexibility and water resistance

Active Publication Date: 2017-09-26
SICHUAN DOWELL SCI & TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the water resistance of this leather finishing agent provided by the prior art has been improved to a certain extent, it is still poor, which limits the wide application of leather finishing agents

Method used

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  • A kind of leather finishing agent and preparation method thereof

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[0039] The present invention has no special limitation on the preparation method of the acrylate monomer, and the three substances in butyl acrylate, ethyl acrylate, styrene and acrylonitrile are mixed; or butyl acrylate, ethyl acrylate, styrene Ethylene and acrylonitrile can be mixed. In an embodiment of the present invention, the mixing may be performed under stirring. In an embodiment of the present invention, the mixing time may be 8 minutes to 12 minutes.

[0040] In an embodiment of the present invention, based on the parts by weight of the γ-glycidyl etheroxypropyl trimethoxysilane, the parts by weight of the persulfate can be 0.1 part to 1 part; in other In an embodiment, the weight part of the persulfate may be 0.5-0.8 parts. In an embodiment of the present invention, the persulfate may be selected from one or more of ammonium persulfate, potassium persulfate and sodium persulfate. In a preferred embodiment of the present invention, the persulfate is a persulfate s...

Embodiment 1

[0079] Add 550g of deionized water to the reaction kettle, add 100g of casein to the reaction kettle under stirring conditions and heat up to 75°C, stir for 1 hour to fully expand the casein to obtain a casein solution; Next, in described casein solution, add the triethanolamine of 20g and carry out the hydrolysis reaction of 2 hours, obtain hydrolyzed casein solution;

[0080] Adjust the temperature of the water bath to 75°C, add 5g of γ-glycidyloxypropyltrimethoxysilane to the hydrolyzed casein solution for 2 hours of heat preservation reaction, and obtain the modified casein solution;

[0081] The butyl acrylate of 22.5g, the ethyl acrylate of 15g and the mixture of the styrene of 7.5g are formed as acrylate monomer, under the condition of stirring, join in the reactor, add in the reactor by 0.8g Ammonium persulfate aqueous solution composed of ammonium persulfate and 25g deionized water, sodium bisulfite aqueous solution composed of 0.5g sodium bisulfite and 25g deionized ...

Embodiment 2

[0087] Add 730g of deionized water to the reaction kettle, add 130g of casein to the reaction kettle under stirring conditions and heat up to 75°C, stir for 1 hour to fully expand the casein to obtain a casein solution; Next, in described casein solution, add the triethanolamine of 26g and carry out the hydrolysis reaction of 2 hours, obtain hydrolyzed casein solution;

[0088] Adjust the temperature of the water bath to 75°C, add 7g of γ-glycidyloxypropyltrimethoxysilane to the above hydrolyzed casein solution for 2 hours of heat preservation reaction, and obtain the modified casein solution;

[0089] The mixture that the butyl acrylate of 20g, the acrylonitrile of 25g and the styrene of 20g are formed as acrylate monomer, under the condition of stirring, join in the reaction kettle, add the ammonium persulfate by 1g in the reaction kettle And the ammonium persulfate aqueous solution that 25g deionized water forms, the sodium bisulfite aqueous solution that is made up of 0.8g...

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Abstract

The invention provides a leather finishing agent. The leather finishing agent is prepared from gamma-glycidoxy propyl trimethoxy silane, acrylate monomer, persulfate, casein, organic amine, water and sulfite, wherein the acrylate monomer comprises more than three of butyl acrylate, ethyl acrylate, styrene and acrylonitrile. The invention provides a preparation method of the leather finishing agent. The preparation method comprises the following step of modifying casein with gamma-glycidoxy propyl trimethoxy silane and the acrylate monomer. Since gamma-glycidoxy propyl trimethoxy silane contains epoxy groups, by modification, epoxy groups are grafted onto macromolecules of casein, the macromolecules and polar groups such as hydroxyl, amino and carboxyl on branched chains of casein are subjected to condensation reaction so that the leather finishing agent provided by the invention has good flexibility and water resistance; and by the further modification of the acrylate monomer, the flexibility and water resistance of the leather finishing agent provided by the invention can be further increased.

Description

technical field [0001] The invention relates to the technical field of leather processing, in particular to a leather finishing agent and a preparation method thereof. Background technique [0002] Leather finishing agents are mainly used for leather modification, especially in the process of polishing and ironing of various front leathers and buffed leathers. Leather finishing agents can firmly bond the coating to the leather surface and improve The high-temperature ironing and polishing properties of leather, and the leather finishing agent can also maintain the hygienic properties unique to natural leather. [0003] At present, the ingredients of leather finishing agents are mostly modified casein, and the substances used to modify casein mainly include polyurethane, caprolactam, and vinyl monomers; however, polyurethane-modified casein has a large Toxicity, the modified casein finishing agent has brought great pollution to the human body and the environment; while the w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F289/00C08F220/18C08F212/08C08F220/44C08H1/00C09D151/00C14C11/00
Inventor 孟文清
Owner SICHUAN DOWELL SCI & TECH INC
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