Preparation method of composite acrylic acid retanning agent

An acrylic retanning agent and compound technology, which is applied in animal husbandry, chemical treatment of small raw hides/large raw hides/leather hides/furs, applications, etc. Infiltration and other problems, to achieve good foaming, good plumpness, increase the effect of permeability

Active Publication Date: 2012-11-28
山东黎宁科技新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the selection of a single macromolecular acrylic polymer retanning agent in retanning can significantly improve the filling and softness of the leather, but the polymer molecules cannot penetrate well due to the large molecular weight, resulting in polymer molecules in the leather. Too much accumulation on the surface, too strong astringent effect on the surface, which eventually leads to rough feeling of the retanned crust leather
Small and medium molecular retanning agent, when preparing soft foaming leather such as cowhide sofas and clothing, the fullness and foaming properties need to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1, the preparation method of compound type acrylic acid retanning agent is characterized in that:

[0024] Achieved by the following steps:

[0025] Step 1: Synthesis of Acrylic Copolymer:

[0026] (1) Add 30 parts by weight of water and 3 parts by weight of isopropanol into the reactor, then add 16.8 parts by weight of acrylic acid, 1.0 parts by weight of butyl acrylate, 2.3 parts by weight of ethyl acrylate, 1.7 parts by weight of hydroxyethyl acrylate, 2.1 Parts by weight of acrylamide are made into mixed monomers;

[0027] (2) Dissolve 1.50 parts by weight of ammonium persulfate into 20 parts by weight of deionized water to make an initiator solution, and add the mixed monomer and initiator solution dropwise at 70°C at the same time, and finish the dropwise addition within 1.0h; Then raise the temperature to 80°C, and keep it warm for 2 hours; after the reaction, raise the temperature to 95°C, distill for 3 hours under normal pressure conditions, distill out the u...

Embodiment 2

[0031] 1, the preparation method of compound type acrylic acid retanning agent is characterized in that:

[0032] Achieved by the following steps:

[0033] Step 1: Synthesis of Acrylic Copolymer:

[0034] (1) Add 35 parts by weight of water and 7 parts by weight of isopropanol into the reactor, then add 19.3 parts by weight of acrylic acid, 2.4 parts by weight of butyl acrylate, 3.0 parts by weight of ethyl acrylate, 2.2 parts by weight of hydroxyethyl acrylate, 3.0 Parts by weight of acrylamide are made into mixed monomers;

[0035] (2) Dissolve 2.60 parts by weight of ammonium persulfate into 25 parts by weight of deionized water to make an initiator solution. At 73°C, add the mixed monomer and initiator solution dropwise at the same time, and finish the dropwise addition within 1.3 hours; After the reaction, the temperature was raised to 83°C and kept for 2.5 hours; after the reaction was completed, the temperature was raised to 98°C, and distilled under normal pressure f...

Embodiment 3

[0039] 1, the preparation method of compound type acrylic acid retanning agent is characterized in that:

[0040] Achieved by the following steps:

[0041] Step 1: Synthesis of Acrylic Copolymer:

[0042] (1) Add 40 parts by weight of water and 10 parts by weight of isopropanol into the reactor, then add 21.8 parts by weight of acrylic acid, 3.8 parts by weight of butyl acrylate, 3.8 parts by weight of ethyl acrylate, 2.7 parts by weight of hydroxyethyl acrylate, 4.0 parts by weight Parts by weight of acrylamide are made into mixed monomers;

[0043] (2) Dissolve 3.75 parts by weight of ammonium persulfate into 30 parts by weight of deionized water to make an initiator solution. At 75°C, add the mixed monomer and initiator solution dropwise at the same time, and finish the dropwise addition within 1.5 hours; Then raise the temperature to 85°C and keep it warm for 3 hours; after the reaction is completed, raise the temperature to 100°C, distill for 3 hours under normal pressu...

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PUM

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Abstract

The invention relates to a preparation method of a composite acrylic acid retanning agent. Acrylic polymer of a single component has poor permeability, so that too many polymer molecules are gathered on the surface of leather; and the fullness and the foamability are also required to be improved for retanning agents of medium and small molecules. The preparation method comprises the following steps of: mixing isopropyl alcohol, acrylic acid, butyl acrylate, ethyl acrylate, hydroxyethyl acrylate and acrylamide into mixed monomer, meanwhile dropwise adding the mixed monomer and initiator solution, raising temperature, preserving heat and performing atmospheric distillation to obtain acrylic acid copolymer; and mixing and stirring the acrylic acid copolymer and fatty alcohol polyethoxylate and adding modified liquid protein filler, modified plant tannin extract and de-ionized water to prepare the composite acrylic acid retanning agent. When the high molecular retanning agent prepared by the invention is used for preparing soft foamed leather, better fullness and foamability are achieved and fine and soft handfeel of the leather is realized.

Description

technical field [0001] The invention relates to a preparation method of a retanning agent, in particular to a preparation method of a compound acrylic retanning agent. Background technique [0002] The various characteristics and feel of leather are mainly endowed through the retanning process, which can obviously increase the added value of leather. Acrylic resin retanning agents have always occupied an important position in retanning agent products because of their excellent filling properties, environmental protection, and variety diversity. [0003] Under normal circumstances, it is difficult to achieve the characteristics of surface fineness, fullness and softness of leather at the same time with only one single component acrylic polymer. For example, the selection of a single macromolecular acrylic polymer retanning agent in retanning can significantly improve the filling and softness of the leather, but the polymer molecules cannot penetrate well due to the large mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/22C08F220/06C08F220/56C08F220/18C08F220/28
Inventor 马建中吕斌麻冬高党鸽
Owner 山东黎宁科技新材料有限公司
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