Preparation method of amphoteric polyacrylic acid retanning agent

A technology of polyacrylic acid retanning agent and acrylic acid, which is applied in the fields of small hide/big hide/leather/fur treatment, tanning treatment, small hide/big hide/leather skin/fur chemical treatment, etc., to achieve good filling performance and combination High fastness and the effect of improving solvent resistance

Active Publication Date: 2020-11-20
汤普勒新材料嘉兴有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the object of the present invention is to provide an amphoteric polyacrylic acid retanning agent and a preparation method thereof, by copolymerizing vinyl ionic liquids with acrylic acid and acrylic acid ester monomers, introducing positively charged polyacrylic acid retanning agents into polyacrylic acid retanning agents organic cationic groups to overcome the discoloration caused by polyacrylic acid retanning agents, improve the leather feel and improve the quality of leather products

Method used

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  • Preparation method of amphoteric polyacrylic acid retanning agent

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preparation example Construction

[0026] A preparation method of amphoteric polyacrylic acid retanning agent, it comprises the following steps:

[0027] S1: Provide monomers for preparing the amphoteric polyacrylic acid retanning agent, the monomers include the following components in parts by weight: Vinyl ionic liquid monomer: 12-35 parts, one of acrylic acid and methacrylic acid One or two: 15-45 parts, acrylamide: 10-25 parts, butyl methacrylate: 15-22 parts, and acrylonitrile: 12-18 parts;

[0028] S2: Stir and mix the vinyl ionic liquid monomer, acrylonitrile, and butyl methacrylate at a certain temperature to obtain a uniform mixed solution A;

[0029] S3: dissolving one or both of acrylic acid and methacrylic acid and acrylamide in a certain amount of pure water to obtain a uniform aqueous solution B;

[0030] S4: Add the mixed solution A and the aqueous solution B into the reaction kettle, and mix them evenly under nitrogen;

[0031] S5: Provide initiators, chain transfer agents, and neutralizing ag...

Embodiment 1

[0044] Weigh 16g of vinyl ionic liquid 1-vinyl-3-butylimidazole bromide, 12g of acrylonitrile, and 17g of butyl methacrylate into the reaction kettle, and stir at 30°C for 1 hour until a uniform mixed solution is obtained A;

[0045] Weigh 35g of acrylic acid and 20g of acrylamide into 165g of water, stir at room temperature for 1 hour to obtain a uniform aqueous solution B;

[0046] Aqueous solution B is joined in the reactor that mixed solution A is housed, and under the condition of nitrogen bubble, continue to stir for 30 minutes, then add 0.5g initiator potassium persulfate, 2g chain transfer agent dodecyl mercaptan , stir and mix evenly, increase the reaction temperature to 60°C, and keep the temperature for 18 hours to ensure complete polymerization of monomers. Remove the heat source, cool the reaction kettle to room temperature, and adjust the pH value of the product to 6.5 to 7.5 with 10% sodium hydroxide solution to obtain the amphoteric polypropylene retanning age...

Embodiment 2

[0049] Weigh 25g of vinyl ionic liquid 1-vinyl-3-methylimidazole chloride, 15g of acrylonitrile, 20g of butyl methacrylate into the reaction kettle, stir at 30°C for 1 hour until a uniform mixed solution is obtained A;

[0050] Weigh 25g of acrylic acid and 15g of acrylamide into 100g of water, stir at room temperature for 1 hour to obtain a uniform aqueous solution B;

[0051] The aqueous solution B was added to the reaction kettle equipped with the mixed solution A, and under the condition of nitrogen bubbling, the stirring was continued for 30 minutes, followed by adding 1.0 g of the initiator ammonium persulfate, 3.0 g of the chain transfer agent cetyl sulfide Alcohol, stir and mix evenly, increase the reaction temperature to 60°C, and keep it warm for 12 hours to ensure complete polymerization of the monomer. Remove the heat source, cool the reaction kettle to room temperature, and adjust the pH value of the product to 6.5 to 7.5 with 30% ammonia water to obtain the amph...

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Abstract

The invention discloses a preparation method of an amphoteric polyacrylic acid retanning agent. The preparation method comprises the following steps: S1, providing a monomer for preparing the amphoteric polyacrylic acid retanning agent, S2, uniformly stirring and mixing the vinyl ionic liquid monomer, acrylonitrile and butyl methacrylate at a certain temperature to obtain a uniform mixed solutionA, S3, dissolving one or two of acrylic acid and methacrylic acid and acrylamide in a certain amount of purified water to obtain a uniform aqueous solution B, S4, uniformly mixing the mixed solution Aand the aqueous solution B under a nitrogen condition, S5, providing an initiator, a chain transfer agent and a neutralizing reagent, S6, adding the initiator and the chain transfer agent into the mixed solution obtained in the step S4 for free radical polymerization, and S7, adding the neutralizing reagent into the solution subjected to free radical polymerization to obtain the amphoteric polyacrylic acid retanning agent. According to the preparation method, the solvent property of the hydrophobic monomer in a water system can be remarkably improved, the use of a solvent is reduced, the polymerization reaction efficiency is improved, and meanwhile, the problem of discoloration is solved.

Description

technical field [0001] The invention relates to the technical field of leather processing, in particular to a preparation method of an amphoteric polyacrylic acid retanning agent. Background technique [0002] Leather production is the process of obtaining strong and durable polymer materials after a series of physical, chemical and mechanical treatments of various raw hides from animals. Throughout the production process, tanning and retanning play a decisive role in the quality of the final product. Tanning is the qualitative change process of leather from raw hide to leather, while retanning helps to improve the performance of leather, such as softness, fullness, elasticity and so on. In addition, retanning is also an important step to promote subsequent operations. For example, after retanning, the position difference of leather becomes smaller and the surface charge changes, which helps the subsequent dyeing and fatliquoring operations to proceed smoothly, and plays a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/22
CPCC14C3/22Y02P20/54
Inventor 张建维金硕胡明晓孙治国
Owner 汤普勒新材料嘉兴有限公司
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