A preparation method of functional micronized leather ash powder

A miniaturized and functional technology, applied in the direction of coating, etc., can solve the problems of poor water vapor transmission capacity and poor hygienic performance of synthetic leather, and achieve the effect of improving hygienic performance and good water vapor permeability

Active Publication Date: 2020-09-29
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the current problems of poor water vapor transmission ability and poor hygienic performance of synthetic leather, the present invention provides a method for preparing functional micronized leather ash powder, which modifies the structure of the ash and improves the spatial structure of the ash

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1 Preparation of functional micronized leather ash powder.

[0029] (1) Pretreatment of grinding leather ash

[0030] Drying the leather ash obtained in the leather grinding process of the tannery to obtain the raw material of the leather ash;

[0031] (2) Functional modification of milled leather ash

[0032] According to step 1), the content of active amino groups in the raw material of leather grinding ash, glutaraldehyde and amino-terminated hyperbranched polyamide is weighed at a molar ratio of 1:0.3:1, and the grinding leather ash is added to a three-necked flask. Add the weighed amino-terminated hyperbranched polyamide into distilled water in an amount of 30mL / g 干燥革灰 , and glutaraldehyde were added dropwise to a three-necked flask at the same time, the temperature was raised to 60°C, and the heat preservation reaction was carried out for 6 hours. After the modified leather ash was washed with ethanol, it was dried at 45°C to a constant weight to make a ...

Embodiment 2

[0036] (1) Pretreatment of grinding leather ash

[0037] Drying the ashes obtained in the grinding process of the tannery to obtain the raw material of the ashes.

[0038] (2) Functional modification of milled leather ash

[0039] Active carboxyl groups in the raw material of grinding leather ash prepared according to step 1), (1-3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC) and active amino groups in amino-terminated hyperbranched polyamides The group content is weighed at a molar ratio of 1:0.3:1, and the leather ash and EDC are added to the three-necked flask according to the reaction sequence, and the weighed amino-terminated hyperbranched polyamide is diluted with distilled water, and the amount of distilled water is 30mL / g 干燥革灰 , added dropwise to a three-necked flask, raised the temperature to 50°C, and kept the temperature for 7 hours. After the modified leather ash was washed with water, it was dried at 45°C to constant weight to make a functionalize...

Embodiment 3

[0043] (1) Pretreatment of grinding leather ash

[0044] Drying the ashes obtained in the grinding process of the tannery to obtain the raw material of the ashes.

[0045] (2) Functional modification of milled leather ash

[0046] According to step 1) the content of active phenolic groups in the active amino group, 4,4'-dicyclohexylmethane diisocyanate (HMDI) and phenolic-terminated hyperbranched polyether in the raw material of ground leather ash is 1:0.4:0.8 mole Compared with weighing, the weighed terminal phenol group hyperbranched polyether was mixed with ethyl acetate (amount of 30mL / g 干燥革灰 ) into a three-necked flask after dilution, add HMDI, heat up to 70°C, keep the temperature for 2 hours, cool down to 50°C, add leather ash to the three-necked flask, and continue to react for 3h. The modified leather ash was washed with acetone and then dried at 45°C to constant weight to prepare functional (high moisture and air permeability) modified leather ash.

[0047] (3) Pr...

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PUM

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Abstract

The invention provides preparation of functional micronized leather buffing dust. The preparation comprises the following steps: (1) pre-treating leather buffing dust; (2) preparing hyperbranched polymer modified leather dust; (3) blending with a negative ion releasing agent to prepare the functional micronized leather dust. The powder for a wet-process coating of synthetic leather, which is prepared by the method, has the advantages that the synthetic leather has negative ion releasing performance, endogenous formaldehyde capturing performance and good sanitary performance.

Description

technical field [0001] The invention belongs to the technical field of leather waste processing, and in particular relates to a preparation method of functional miniaturized leather grinding ash powder. Background technique [0002] Due to the processes of slicing, smoothing, grinding and edging in tanning production, a large amount of tanning raw materials are transformed into leather solid waste during the tanning process. my country has now become the world's leather production center, producing millions of tons of leather solid waste every year; in addition, when leather products are made into leather products such as clothing, shoes and bags, it is inevitable due to the particularity of the shape of the leather. A large amount of cutting waste is produced, and hundreds of thousands of tons of leather cutting residues are produced every year. [0003] According to the different harmful substances contained, leather waste can be roughly divided into three categories. The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/00C08L75/08C08L71/00C08K3/34C08K3/00C08K3/22C08K3/38C09D7/61C09D7/62C09D7/65
CPCC08K3/00C08K3/22C08K3/34C08K3/38C08K2003/2241C09D7/61C09D7/62C09D7/65C08L77/00C08L75/08C08L71/00
Inventor 张斐斐刘洁
Owner QILU UNIV OF TECH
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