A kind of preparation method and application of aluminum tanning agent complex that can be polymerized in skin collagen

A technology of aluminum tanning agents and complexes, applied in the field of leather processing, can solve the problems of loss of tanning properties, achieve the effects of maintaining tanning ability, improving absorption rate, and meeting high-quality requirements

Active Publication Date: 2020-07-17
白银普瑞特化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This caused Al 3+ The hygrothermal stability of collagen endowed by complex tanning agents is far less than that of Cr 3+ Complex tanning agent, Al 3+ The cross-linking coordination bonds formed by complex tanning agents and collagen side chain groups are easily absorbed by H 2 O and other active groups are substituted to lose tanning properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Preparation of stable aluminum tanning agent complexes

[0032] Dissolve 0.3mol N-methylolacrylamide, 0.6mol acrylamidosulfonate, 0.5mol maleic anhydride and 0.2mol acrylic acid in water to make a 30% polymerizable monomer aqueous solution; formula aluminum chloride (basicity is 70%) to prepare an aluminum ligand aqueous solution with a mass fraction of 50%, control the volume ratio of the two to 0.5:1, and keep it warm at 60°C for 12h to form a light yellow viscous liquid; then The pH value of the viscous liquid is adjusted to 4.0 with sodium carbonate solution, and spray-dried to obtain white aluminum tanning agent complex powder.

[0033] 2. Preparation of oxidation-reduction system initiator

[0034] The initiator is prepared by mixing the following components: 1 mol ammonium persulfate, 0.8 mol sodium bisulfite and 0.4 mol sodium carbonate.

[0035] 3. Tanning process

[0036] First, the aluminum tanning agent complex powder is added to the pickling solution ...

Embodiment 2

[0038] 1. Preparation of stable aluminum tanning agent complexes

[0039] Dissolve 0.2 mol of acrylamide, 1.3 mol of propylene sulfonic acid, and 0.2 mol of methacrylic acid in water to prepare an aqueous polymerizable monomer solution with a mass fraction of 30%; The aluminum ligand aqueous solution with a fraction of 50% is controlled at a volume ratio of 1:1, and kept at 75°C for 10 hours to form a light yellow viscous liquid; then use sodium carbonate solution to adjust the pH of the viscous liquid to 4.1, Spray drying to obtain white aluminum tanning agent complex powder.

[0040] 2. Preparation of oxidation-reduction system initiator

[0041] The initiator is prepared by mixing the following components: 1 mol potassium persulfate, 1.0 mol sodium bisulfite and 0.8 mol sodium bicarbonate.

[0042] 3. Tanning process

[0043]First, the aluminum tanning agent complex powder is added to the pickling solution of the drum according to 15% of the weight of the bare skin, and ...

Embodiment 3

[0045] 1. Preparation of stable aluminum tanning agent complexes

[0046] 0.5mol N-methylolacrylamide, 0.6mol acrylamidosulfonate, 1.0mol propylenesulfonic acid and 0.5mol maleic anhydride were dissolved in water to prepare an aqueous polymerizable monomer solution with a mass fraction of 30%; Prepare basic aluminum sulfate (basicity: 50%) into an aluminum ligand aqueous solution with a mass fraction of 50%, control the volume ratio of the two to 2:1, and keep warm at 75°C for 6 hours to form a light yellow viscous liquid; Then adjust the viscous liquid pH value to 4.1 with sodium carbonate solution, and spray dry to obtain white aluminum tanning agent complex powder.

[0047] 2. Preparation of oxidation-reduction system initiator

[0048] The initiator is prepared by mixing the following components: 1 mol potassium persulfate, 1.0 mol sodium thiosulfate, and 0.4 mol sodium carbonate.

[0049] 3. Tanning process

[0050] First, the aluminum tanning agent complex powder is a...

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Abstract

The invention discloses a preparation method and application of an aluminum tanning agent complex capable of polymerizing in leather collagen, and belongs to the technical field of leather processing.The preparation method comprises the steps that water-soluble polymers mainly comprising non-volatile unsaturated monomers, such as propylene sulfonic acids, are used as raw materials to prepare thealuminum tanning agent capable of polymerizing in the leather collagen in leather, and then the complex unsaturated monomers in the aluminum tanning agent are subjected to polymerization reaction in the leather collagen by using an initiator to form polymers, and transverse crosslinking or multi-point hydrogen bonds is / are formed, so that the shrinkage temperature of the leather collagen can be upto 80 DEG C. The polymers can be generated in the leather collagen, so that the absorption rate of aluminum tannin is improved, the washing resistance of the aluminum tanning agent in the leather isimproved, and the aluminum tanning agent can be used in a leather tanning agent instead of a chrome tanning agent. According to the preparation method and the application of the aluminum tanning agentcomplex capable of polymerizing in the leather collagen, the high quality requirement of the leather is met, and the cleaning technical requirement of the leather industry is met.

Description

technical field [0001] The invention belongs to the technical field of leather processing, in particular to a preparation method of an aluminum tanning agent complex capable of polymerizing in hide collagen and the application of the aluminum tanning agent in leather processing. Background technique [0002] Since the advent of chrome tanning in 1858 for more than a century, chrome tanning agents have played a dominant role in leather production due to their excellent leather-forming properties, and people have studied deeply and extensively on chrome tanning. However, the traditional chrome tanning method does not completely absorb chromium, generally only 60%-80%; and the high-absorption chrome tanning method after complex changes and improvements cannot meet the stringent emission requirements of chromium. Moreover, there is a risk of trivalent chromium being transformed into hexavalent chromium under the action of some fatliquoring agents and retanning agents. Hexavalen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C3/22C08F220/58C08F222/06C08F228/02
CPCC08F220/58C08F220/585C08F228/02C14C3/22C08F222/06
Inventor 吴育彪关正祥党建荣李清松
Owner 白银普瑞特化工有限公司
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