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Composite leather greasing agent and preparation method thereof

A kind of leather fatliquor, compound technology, applied in leather impregnation, small raw hide/large raw hide/leather/fur treatment, small raw hide/large raw hide/leather hide/fur chemical treatment, etc. Problems such as poor grease performance, limited application, and low proportion of dialkyl phosphate esters can achieve the effects of excellent comprehensive fatliquoring performance, high active content and simple production process.

Inactive Publication Date: 2010-06-30
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the increase of dialkyl phosphate will reduce the water emulsification performance of the product. Usually, in order to ensure that the phosphate fatliquoring agent has better water emulsification performance, the ratio of monoalkyl phosphate must be higher than 70%, so that dialkyl phosphate The lower ratio of ester reduces the fatliquoring performance of such products and limits the application of such products
[0007] Sulfonated succinate leather fatliquor is mainly composed of hydroxyl-containing oil raw materials (such as castor oil, amidated rapeseed oil, long-chain fatty alcohol, etc.) and maleic anhydride monoesterification, and then with sulfurous acid The product is obtained by sulfitation reaction. The product molecule contains two hydrophilic groups of carboxylate and sulfite. It has good water emulsification performance, but poor product stability and fatliquoring performance.

Method used

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  • Composite leather greasing agent and preparation method thereof
  • Composite leather greasing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 872g (1mol) of rapeseed oil into a four-necked flask with a reflux device, raise the temperature to 80°C, then add 67.1g (1.1mol) of monoethanolamine, 3.75g of sodium methoxide, and then raise the temperature to 130°C for 3 hours. After the reaction, the temperature was lowered to 120°C, the degree of vacuum was 0.02-0.05 MPa, and the vacuum was vacuumed for 30 minutes to remove unreacted monoethanolamine to obtain amidated rapeseed oil (hydroxyl value about 147 mg KOH / g).

Embodiment 2

[0021] Add 114g of the amidated modified rapeseed oil prepared in Example 1 into a four-neck flask equipped with a reflux and temperature control device, raise the temperature to 60°C, add 3.55g of phosphorus pentoxide, then raise the temperature to 80°C, and keep the temperature for 2 hours. After the heat preservation is over, lower the temperature to 70°C, add 19.6g of maleic anhydride, then raise the temperature to 90°C, and keep the temperature for 2.5 hours. , adjust the pH of the reactant to 6.5-7.5, then add aqueous sodium bisulfite solution (21.84g sodium bisulfite dissolved in 90.69g deionized water), heat up to 80°C after the addition, and keep the temperature for 2 hours to obtain the effective substance mass fraction About 55% compound leather fatliquor.

[0022] Example 2

[0023] Add 114g of the amidated modified rapeseed oil prepared in Example 1 into a four-neck flask equipped with a reflux and temperature control device, raise the temperature to 60°C, add 5....

Embodiment 3

[0025] Add 152g of the amidated modified rapeseed oil prepared in Example 1 into a four-neck flask with a reflux and temperature control device, raise the temperature to 60°C, add 3.55g of phosphorus pentoxide, then raise the temperature to 80°C, and keep the temperature for 2 hours. After the heat preservation is over, lower the temperature to 70°C, add 29.4g of maleic anhydride, then raise the temperature to 90°C, and keep the temperature for 2.5 hours. , adjust the pH of the reactant to 6.5-7.5, then add an aqueous solution of sodium bisulfite (32.76g of sodium bisulfite dissolved in 145g of deionized water), heat up to 80°C after the addition, and keep the reaction for 2 hours to obtain an effective substance mass fraction of about 55% compound leather fatliquor.

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PUM

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Abstract

The invention provides a composite leather greasing agent used for a leather greasing work procedure and a preparation method thereof. The composite greasing agent comprises two ingredients: alkyl phosphate and disodium sulfosuccinate. The preparation method comprises the following steps: making hydroxylated animal and vegetable oil and modifiers thereof take phosphorylation reaction with phosphorus pentoxide; then, making obtained materials take monoester reaction with maleic anhydride; and next, making obtained materials take sulphitation reaction with sodium bisulfite to obtain the composite leather greasing agent with the two ingredients of alkyl phosphate and disodium sulfosuccinate. The composite leather greasing agent has the characteristics of high active matter content, strong combination capability with leather and good comprehensive greasing performance. The production process of the composite leather greasing agent is simple, and the discharge of the three wastes does not occur in the production process.

Description

technical field [0001] The invention relates to a leather fatliquoring agent used in the leather fatliquoring process and a preparation method thereof, in particular to a composite leather fatliquoring agent and a preparation method thereof. Background technique [0002] Phosphate-based leather fatliquors and sulfosuccinate-based leather fatliquors are two important types of leather fatliquor products. Phosphate ester fatliquor contains phosphate radicals in its molecules, which can complex with chromium salts and other multivalent metal salts, and at the same time combine with leather fibers, which can endow leather with permanent fatliquoring effect; phosphate ester fatliquor has good permeability , has a filling effect on leather, and the finished leather has a special soft feeling, plump leather body, and good elasticity; phosphate ester leather fatliquor has good biodegradability, which is helpful for reducing the pollution of the fatliquoring waste liquid to the enviro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C9/02
Inventor 邹祥龙兰云军柴玉叶周建飞
Owner WENZHOU UNIVERSITY
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