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Dyeing polyurethane resin and application of dyeing polyurethane resin in synthetic leather

A technology of polyurethane resin and synthetic leather, which is applied in the direction of textiles and papermaking, etc., to achieve stable product performance, good antibacterial effect, and good fastness to wet treatment

Active Publication Date: 2017-06-13
JIAXING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And prodigiosin is used as a kind of fat-soluble coloring agent in synthetic leather process and there is no report yet

Method used

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  • Dyeing polyurethane resin and application of dyeing polyurethane resin in synthetic leather
  • Dyeing polyurethane resin and application of dyeing polyurethane resin in synthetic leather
  • Dyeing polyurethane resin and application of dyeing polyurethane resin in synthetic leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Get each raw material of following parts by weight respectively:

[0046]

[0047] Utilize the raw material of above-mentioned weight part to prepare printing paste, comprise the following steps:

[0048] (1) Grind 5 parts of prodigiosin with a ball mill to a fine powder with a particle size between 0.5 and 2 μm, add the fine powder to 15 parts of DMF (dimethylformamide), mix well, and obtain A liquid;

[0049] (2) PU solution prepared by mixing 20 parts of polyurethane resin with 60 parts of DMF to obtain liquid B;

[0050] (3) Add liquid A to liquid B, mix, beat, and homogenize to keep the pH value at a weakly acidic 6-6.5 to obtain PU color paste.

[0051] (4) Scrape-coat the PU color paste on the base cloth, then enter the wet coagulation bath, and then further wash and dry to obtain the PU leather wet fabric layer.

[0052] (5) Pour the PU color paste onto the polytetrafluoroethylene board by scraping, and then dry it to make a film with a thickness of about ...

Embodiment 2

[0056] Take 0.01 part, 0.5 part, 2 parts, 8 parts, 10 parts of prodigiosin respectively, the parts by weight of other raw materials are the same as in Example 1, and the preparation method of PU color paste is the same as in Example 1. The method of step (5) in Example 1 was used to prepare the PU film material in order to test the application performance of the PU color paste, and the specific results are shown in Table 1.

[0057] Table 1 Effect of prodigiosin content on the color effect of PU leather

[0058]

[0059] It can be seen from Table 1 that when the amount of prodigiosin is 0.01 part, its color is lighter. The amount of prodigiosin has little effect on the mechanical properties of PU leather, and basically maintains the original excellent physical and mechanical properties of PU leather. As the amount of prodigiosin increases, the color depth of PU synthetic leather increases, and the color is also brighter and fuller. When the amount of prodigiosin is more t...

Embodiment 3

[0061] Embodiment 1 adopts dimethylformamide (DMF) as solvent, uses 2-butanone (MEK) and ethanol (EA) respectively as solvent replacement dimethylformamide (DMF) in embodiment 1, all the other are the same as embodiment 1. Utilize the above-mentioned raw materials in parts by weight to prepare PU color paste, and then adopt a conventional finishing treatment process preparation method (step (5) method in Example 1) to prepare a PU finishing layer. The influence of solvent types on the color effect of PU leather is shown in Table 2.

[0062] Table 2 The effect of solvent types on the color effect of PU leather

[0063]

[0064] As can be seen from Table 2, when DMF is used as the solvent, the mechanical properties of the PU material are excellent, the color is bright, the color is full, and the fastness to wet treatment is excellent. Therefore, the present invention selects DMF as the solvent.

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Abstract

The invention discloses a dyeing polyurethane resin and an application thereof in synthetic leather. The dyeing polyurethane resin comprises the following components in parts by weight: 0.01-10 parts of prodigiosin, 5-70 parts of polyurethane resin, 20-94.9 parts of organic solvent and 0-10 parts of auxiliaries. According to the invention, the prodigiosin is used as a colorant and the polyurethane resin is dissolved in an organic solvent (such as dimethyl formamide, ethanol, acetone or ethyl acetate) so as to prepare pulp; on the basis of a suitable compounding and preparing method, the prodigiosin can be uniformly dispersed and fully dissolved, so that the stable PU color paste performance is maintained; the PU color paste is applied to a synthetic leather wet-process bass layer or coating process; the application process is simple; the operation is convenient; the acquired colorful PU leather has bright color, excellent mechanical property, excellent wet-processing firmness and excellent antibacterial effect.

Description

technical field [0001] The invention relates to the technical field of synthetic leather processing, in particular to an environment-friendly, antibacterial, mildew-resistant and dyed polyurethane resin and its application in the preparation of synthetic leather. Background technique [0002] Polyurethane (PU) synthetic leather has excellent properties such as outstanding wear resistance, strength and toughness, solvent resistance, oil resistance, and high cutting rate, and is widely used in sports and leisure shoes, leather shoes, leather clothes, bags, sofas, stationery, It is an ideal substitute for natural leather in products such as automotive interiors. [0003] However, ordinary polyurethane synthetic leather is not long after it is made into a finished product. Because the material contains nutrients necessary for bacteria and mold, under suitable temperature and humidity conditions, microorganisms will multiply in large numbers, causing the biodegradation of polyure...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08K5/3415D06N3/00D06N3/14
Inventor 吕海宁代正伟
Owner JIAXING UNIV
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