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A kind of anti-yellowing type titanium dioxide/fatty acid based leather fatliquor and preparation method thereof

A leather fatliquor, titanium dioxide technology, applied in small raw hide/large raw hide/leather/fur treatment, small raw hide/large raw hide/leather hide/fur chemical treatment, leather impregnation, etc. Shielding performance, affecting the bonding with the polymer matrix, etc., to achieve the effect of improving the interface bonding, increasing the bonding strength, and improving the resistance to yellowing

Active Publication Date: 2022-05-24
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nano-TiO 2 It is easy to form agglomerates during use, which will not only weaken its UV shielding performance, but also affect its combination with the polymer matrix

Method used

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  • A kind of anti-yellowing type titanium dioxide/fatty acid based leather fatliquor and preparation method thereof
  • A kind of anti-yellowing type titanium dioxide/fatty acid based leather fatliquor and preparation method thereof
  • A kind of anti-yellowing type titanium dioxide/fatty acid based leather fatliquor and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0032] The yellowing-resistant TiO of the present invention 2 / The preparation method of fatty acid-based leather fatliquor, comprising the steps:

[0033] Add 200-1000 parts of fatty acid into the three-necked flask according to the mass parts, slowly heat up until the fatty acid is completely melted, to obtain a reaction system A, and add 2-30 parts of TiO to the reaction system A 2 -COOH, heat and stir in a water bath for a one-stage reaction, set the water bath temperature of the one-stage reaction system to 80-90°C, the rotational speed to 400r / min, and the reaction time to be 4-6h; obtain the reaction system B, and then add it to the reaction system B Add 40-200 parts of monoethanolamine, conduct oil bath heating and stirring to carry out two-stage reaction, set the oil bath temperature of the two-stage reaction system to be 120-160°C, the rotation speed to be 250-350r / min, and the reaction time to be 2-5h; the reaction is over Then, reaction system C is obtained, the ...

Embodiment 1

[0046] Step 1: TiO 2 Preparation of -COOH UV shielding agent

[0047] 1g TiO 2 -NH 2 Add into 100g absolute ethanol, ultrasonically disperse at 45°C for 30min to obtain a reaction system (suspension), pour the suspension into a three-necked flask, set the water bath temperature of the reaction system to 45°C, and stir the reaction speed to 400r / min, add 0.4g glyoxal and 0.3g acrylic acid, react for 5h, cool the product, centrifuge, wash with alcohol, dry in a vacuum oven at 40°C for 5h to obtain carboxylated modified nano-TiO 2 UV shielding agent.

[0048] Step 2: Anti-yellowing TiO 2 / Preparation of myristic acid-based leather fatliquor

[0049] Add 65 g of myristic acid to the three-necked flask, slowly heat up until the myristic acid is completely melted, and add TiO to the reaction system 2 -COOH dispersion (0.75g TiO 2 -COOH was dissolved in 100g absolute ethanol), heated and stirred in a water bath, the water bath temperature of the reaction system was set to 80...

Embodiment 2

[0051] Step 1: TiO 2 Preparation of -COOH UV shielding agent

[0052] 1g TiO 2 -NH 2 Add into 100g absolute ethanol, ultrasonically disperse at 45°C for 30min to obtain a reaction system (suspension), pour the suspension into a three-necked flask, set the water bath temperature of the reaction system to 45°C, and stir the reaction speed to 400r / min, add 0.4g glyoxal and 0.3g acrylic acid, react for 5h, cool the product, centrifuge, wash with alcohol, dry in a vacuum oven at 40°C for 5h to obtain carboxylated modified nano-TiO 2 UV shielding agent.

[0053] Step 2: Anti-yellowing TiO 2 / Preparation of lauric acid-based leather fatliquor

[0054] Add 60g of lauric acid to the three-necked flask, slowly heat up until the lauric acid is completely melted, and add TiO to the reaction system 2 -COOH dispersion (1.5g TiO 2 -COOH was dissolved in 100g absolute ethanol), heated and stirred in a water bath, the water bath temperature of the reaction system was set to 80°C, the ...

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Abstract

The invention discloses a yellowing-resistant titanium dioxide / fatty acid-based leather fatliquoring agent and a preparation method thereof, which belong to the technical field of tanning auxiliaries. The preparation method uses fatty acid as the main monomer, monoethanolamine as the amidation modifier, and TiO 2 ‑COOH is an ultraviolet shielding agent, and a kind of anti-yellowing TiO is prepared by blending method 2 / Fatty acid based leather fatliquor. The invention solves the problem that the surface of existing leather products is prone to aging and yellowing when used, and introduces TiO into the fatty acid-based fatliquoring agent through a blending method 2 ‑COOH UV shielding agent, finally obtained TiO with good mechanical properties and anti-yellowing properties 2 / Fatty acid based leather fatliquor. The yellowing resistance grade of crust leather after fatliquoring can reach grade 4-5.

Description

technical field [0001] The invention belongs to the technical field of leather-making auxiliaries, and relates to a yellowing-resistant titanium dioxide / fatty acid-based leather fatliquor and a preparation method thereof. Background technique [0002] White or light-colored leather products are favored by more and more people because of their elegance, simplicity, fashion and beauty, but they will inevitably be exposed to ultraviolet rays during use, resulting in surface aging and yellowing. Greatly affects the service life and aesthetics. As an important process in tanning, fatliquoring will use a fatliquor in the process to combine the skin collagen fibers with a certain amount of fatliquor to lubricate the skin collagen fibers, thereby giving the leather softness, Elasticity, plumpness and functionality. The performance of the fatliquor directly affects the performance of the leather. Therefore, the preparation of the anti-yellowing fatliquor has received extensive atte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C14C9/02
CPCC14C9/02
Inventor 张跃宏刘晨阳马建中
Owner SHAANXI UNIV OF SCI & TECH