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Preparation method of polyacrylic ester/hollow silicon dioxide nanometer composite leather finishing agent

A technology of leather finishing agent and polyacrylate, which is applied in dyeing polymer organic compound treatment, textile and papermaking, fiber treatment, etc. It can solve the problem of no significant effect on the hygienic performance of leather finishing agent, and achieve the improvement of tensile strength and water permeability. The effect of improving the steam property and improving the mechanical properties

Inactive Publication Date: 2012-10-03
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there is a problem that the introduced inorganic nanoparticles have a dense solid structure, which has no significant effect on the improvement of the hygienic performance of the leather finishing agent.

Method used

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  • Preparation method of polyacrylic ester/hollow silicon dioxide nanometer composite leather finishing agent
  • Preparation method of polyacrylic ester/hollow silicon dioxide nanometer composite leather finishing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Preparation of polystyrene microspheres:

[0023] Add 1.5 g of polyvinylpyrrolidone and 0.38 g of azobisisobutylamidine hydrochloride into a three-necked flask filled with 100 g of distilled water, and stir to form a uniform and transparent solution. Add 3.0 g of styrene to the above solution, stir for 30 min, deoxygenate with argon atmosphere for 1 h, raise the temperature to 70° C., and keep the reaction for 24 h. After the reaction, a uniform and stable polystyrene microsphere emulsion is obtained.

[0024] (2) Preparation of hollow silica nanoparticles:

[0025] Take 30g of polystyrene microsphere emulsion, adjust its pH to 4.12, add 1.33g of tetraethyl orthosilicate, and keep warm at 50°C for 24h. It was centrifuged with a high-speed rotary centrifuge, and the lower precipitate was washed three times with distilled water and absolute ethanol in turn to obtain core-shell polystyrene / silicon dioxide composite microspheres, which were then dispersed in tetrahydr...

Embodiment 2

[0029] (1) Preparation of polystyrene microspheres:

[0030] Add 0.5 g of cetyltrimethylammonium bromide and 0.39 g of azobisisobutylcyanide into a three-necked flask filled with 100 g of distilled water, and stir to form a uniform and transparent solution. Add 4.0 g of styrene to the above solution, stir for 30 min, deoxygenate in an argon atmosphere for 1 h, raise the temperature to 85°C, and keep the reaction for 23 h. After the reaction, a uniform and stable polystyrene microsphere emulsion is obtained.

[0031] (2) Preparation of hollow silica nanoparticles:

[0032] Take 37g of polystyrene microsphere emulsion, adjust its pH to 4.0, add 1.0g of vinyltriethoxysilane, and keep warm at 50°C for 25h. It was centrifuged with a high-speed rotary centrifuge, and the lower sediment was washed three times with distilled water and absolute ethanol in turn to obtain core-shell polystyrene / silicon dioxide composite microspheres, which were then dispersed in acetone and heated at 4...

Embodiment 3

[0036] (1) Preparation of polystyrene microspheres:

[0037] Add 2.5 g of dodecyltrimethylammonium bromide and 0.41 g of ammonium persulfate into a three-necked flask filled with 100 g of distilled water, and stir to form a uniform and transparent solution. Add 2.0 g of styrene to the above solution, stir for 30 min, deoxygenate with argon atmosphere for 1 h, raise the temperature to 80° C., and keep the reaction for 25 h. After the reaction, a uniform and stable polystyrene microsphere emulsion is obtained.

[0038] (2) Preparation of hollow silica nanoparticles:

[0039] Take 60g of polystyrene microsphere emulsion, adjust its pH to 6.0, add 1.4g of methyltriethoxysilane, and keep the reaction at 50°C for 20h. It was centrifuged with a high-speed rotary centrifuge, and the lower sediment was washed three times with distilled water and absolute ethanol in turn to obtain core-shell polystyrene / silicon dioxide composite microspheres, which were then dispersed in chloroform. ...

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Abstract

The invention relates to a preparation method of a polyacrylic ester / hollow silicon dioxide nanometer composite leather finishing agent. The polyacrylic ester is a kind of film forming matters most extensively applied in the leather finishing material, the polyacrylic ester has excellent optical stability, chemical resistance, extensibility and good cohesiveness, while the polyacrylic ester forms a layer of dense thin film on the leather surface to severely block the passage through which the water vapor emitted by a human body disperses to outside, so that the sanitary performance of a leather product is greatly affected. According to the invention, polystyrene microspheres are used as a template to prepare hollow silicon dioxide nanometer particles, and the hollow silicon dioxide nanometer particles are mixed with the polyacrylic ester to prepare the polyacrylic ester / hollow silicon dioxide nanometer composite leather finishing agent. Compared with the pure polyacrylic ester leather finishing agent, the composite leather finishing agent prepared by the preparation method has the advantages that the water vapor permeability is improved by 82.6%, the tensile strength is increased by 37.72% and the elongation at break is increased by 11.09%.

Description

technical field [0001] The invention relates to a preparation method of a leather finishing agent, in particular to a preparation method of a polyacrylate / hollow silica nanometer composite leather finishing agent. Background technique [0002] Leather finishing agent is a polymer compound that is evenly coated on the leather surface. It forms one or more layers of film on the surface of the leather through adhesion, which improves the appearance and style of the leather, increases the function of the leather, and increases the added value of the product. Due to its excellent light stability, chemical resistance, elongation and good adhesion, polyacrylate has become the largest category of leather finishing agents, but polyacrylate forms a dense film on the leather surface , Seriously blocked the channel for the water vapor emitted by the human body to diffuse to the outside world, resulting in a great impact on the hygienic performance of leather products. [0003] At pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/263D06M11/79D06M23/00C09C1/28C09C3/10
Inventor 鲍艳杨永强马建中刘俊莉
Owner SHAANXI UNIV OF SCI & TECH
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