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A kind of amphoteric synthetic fatliquor and its preparation method and application

A fatliquor, amphoteric technology, applied in the field of amphoteric synthetic fatliquor and its preparation, can solve the problems of low binding force, low utilization rate, increased cost, etc. Effect

Active Publication Date: 2022-07-12
QI HE LI HOU CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the commonly used leather fatliquors are natural animal and vegetable oils emulsified into emulsions through emulsifiers, or chemically modified to make them self-emulsifying. Common modification methods include sulfation, oxidative sulfitation, phosphorylation or alcohol These fatliquors are mainly anionic, and other chemical materials used in leather are also mainly anionic, so the binding force between these anionic fatliquor and other anionic materials is not high, and it is not easy to adhere to the inside of the leather. , low utilization
Moreover, natural oils are more prone to rancidity and hydrolysis, and more antioxidants are needed, which increases the cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0042] The present invention also provides the preparation method of the amphoteric synthetic fatliquor described in the above technical scheme, comprising the following steps:

[0043] Mixing hydroxyorganic amine and maleic anhydride, carry out amidation reaction to obtain amidation product;

[0044] Mixing the amidated product and an acidic catalyst, and carrying out an esterification reaction to obtain an esterified product;

[0045] Mixing the esterified product with a long-chain vinyl compound and an initiator, and carrying out a vinyl polymerization reaction to obtain a polymerized product;

[0046] The polymerized product is mixed with water, pre-emulsified, and the obtained pre-emulsified system is saponified to obtain an amphoteric synthetic fatliquor.

[0047] In the present invention, preferably, before preparing the amphoteric synthetic fatliquor, all raw material components except water are dried until moisture-free. In a specific embodiment of the present inventi...

Embodiment 1

[0058] Dry all materials except water until moisture-free;

[0059] In parts by weight, 150 parts of N,N-bis(2-hydroxyethyl)ethylenediamine and 98 parts of maleic anhydride were added to the reactor, heated to 40°C, and subjected to amidation reaction for 3 hours to obtain amidation products;

[0060] Add solid acid catalyst B to the amidation product 2 O 3 -Al 2 O 3 10 parts, carry out esterification reaction at 150 ℃ for 6 hours to obtain esterification product;

[0061] To the esterified product, 22 parts of carboxymethyl octadecyl methyl diallyl ammonium chloride, 300 parts of octadecyl acrylate and 10 parts of benzoyl peroxide were added, and vinyl chloride was carried out at 90° C. The polymerization reaction was carried out for 4 hours, 1000 parts of distilled water was added, the mixture was stirred at 2000 rpm for 1 hour, and the pH value was adjusted to 7.0 with a 30% sodium hydroxide solution to obtain an amphoteric synthetic fatliquor.

Embodiment 2

[0063] Dry all materials except water until moisture-free;

[0064] In parts by weight, 236 parts of N,N,N',N'-tetrahydroxyethylethylenediamine and 300 parts of maleic anhydride were added to the reactor, heated to 80°C, and carried out amidation reaction for 2 hours , to obtain an amidated product;

[0065] Add 12 parts of p-toluenesulfonic acid to the amidation product, and carry out an esterification reaction at 120° C. for 6 hours to obtain an esterified product;

[0066] Add 295 parts of hexadecyl acrylate and 10 parts of azobisisobutyronitrile to the esterified product, carry out the first vinyl polymerization reaction at 110 ° C for 3 hours, and then add 100 parts of tetraallyl ammonium chloride , add 10 parts of ammonium persulfate, carry out the second vinyl polymerization reaction at 110 ° C for 3 hours, add 2000 parts of distilled water, stir at a speed of 3000 rpm for 1 hour, adjust the pH value to 6.8 with a 30% sodium hydroxide solution , to obtain the amphoter...

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PUM

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Abstract

The invention provides an amphoteric synthetic fatliquor and a preparation method and application thereof, and relates to the technical field of leather chemical industry. The preparation of the amphoteric synthetic fatliquor provided by the invention includes the following components in parts by weight: 50-300 parts of hydroxyl organic amine; 50-400 parts of maleic anhydride; 50-500 parts of long-chain vinyl compound; acid catalyst 5-30 parts; initiator 5-30 parts; water 150-2000 parts. The amphoteric synthetic fatliquor provided by the invention has the characteristics of stable properties and not easy to deteriorate, and has the characteristics of anionic fatliquor and cationic fatliquor at the same time, and can not only have strong binding force with leather collagen fibers, but also have good It has the functions of surface fatliquoring and internal fatliquoring, endows the leather with good softness and comfortable hand feel, and can achieve better results with less fatliquoring agent.

Description

technical field [0001] The invention relates to the technical field of leather chemical industry, in particular to an amphoteric synthetic fatliquor and a preparation method and application thereof. Background technique [0002] Fatliquoring is the most critical process in tanning production. Through reasonable and appropriate fatliquoring of the raw leather, it can absorb an appropriate amount of fatliquoring material, restore its original softness and elasticity, and prevent the leather from stiffening and cracking. Gives leather a certain performance. In addition, through fatliquoring, the tensile strength, toughness, elongation, and yield of leather are improved, and at the same time, the water resistance is significantly improved, and the leather is also given a good feel. [0003] Most commonly used leather fatliquors are natural animal and vegetable oils emulsified into emulsions by emulsifiers, or chemically modified to make them self-emulsifying. Common modificatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F226/04C08F222/38C08F226/02C14C9/02
Inventor 王顺平冯练享白清泉
Owner QI HE LI HOU CHEM CO LTD