A kind of preparation method of dyeable polyurethane film

A polyurethane film and polyurethane technology, applied in the field of polyurethane materials, can solve the problem of rare polyurethane dyeing effect, and achieve the effects of improving dye uptake and dyeing fastness, strong dyeing fastness, and low equipment requirements.

Active Publication Date: 2017-12-12
汕头市亮彩新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on improving the dyeing effect of polyurethane

Method used

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  • A kind of preparation method of dyeable polyurethane film
  • A kind of preparation method of dyeable polyurethane film
  • A kind of preparation method of dyeable polyurethane film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Add N,N-methylenebisacrylamide (MBA) and diethylenetriamine (DETA) with a molar ratio of 1:1.1 to the solvent N,N-dimethylformamide (DMF), and add it at 40 After reacting at ℃ for 24h, a yellow-green amino-terminated hyperbranched polymer is obtained; the ratio of the total mass of N,N-methylenebisacrylamide and diethylenetriamine to the mass of N,N-dimethylformamide is 1 :1.1; The synthetic route and structural formula of amino-terminated hyperbranched polymer are as follows figure 1 Shown.

[0032] 2) Add isophorone diisocyanate with a molar ratio of 1:1.1 and absolute ethanol to the solvent N,N-dimethylformamide, and react at 0°C for 4 hours to obtain a blocking agent, wherein the isophorone The mass ratio of the total mass of ketone diisocyanate and absolute ethanol to the mass of N,N-dimethylformamide is 1:1.1; the synthetic route of the blocking agent is as follows figure 2 Shown.

[0033] 3) Mix the amino-terminated hyperbranched polymer with a mass ratio of 3:0....

Embodiment 2

[0037] 1) Add N,N-methylenebisacrylamide (MBA) and diethylenetriamine (DETA) with a molar ratio of 1:1.2 into the solvent N,N-dimethylformamide (DMF), and add it to the solvent at 80 After 8 hours of reaction at ℃, a yellow-green amino-terminated hyperbranched polymer is obtained; the ratio of the total mass of N,N-methylenebisacrylamide and diethylenetriamine to the mass of N,N-dimethylformamide is 1 :1.2;

[0038] 2) Add isophorone diisocyanate with a molar ratio of 1:1.2 and anhydrous ethanol to the solvent N,N-dimethylformamide, and react at 10°C for 2.5 hours to obtain a blocking agent. The mass ratio of the total mass of ketone diisocyanate and absolute ethanol to the mass of N,N-dimethylformamide is 1:1.2;

[0039] 3) Mix the amino-terminated hyperbranched polymer with a mass ratio of 3:1 and the end-capping agent, and react at 65°C for 3h to obtain the end-capped hyperbranched polymer.

[0040] 4) Add the solvent N,N-dimethylformamide to the polyurethane raw material, stir ...

Embodiment 3

[0043] 1) Add N,N-methylenebisacrylamide (MBA) and diethylenetriamine (DETA) with a molar ratio of 1:1.3 to the solvent N,N-dimethylformamide (DMF), and add it at 60 After reacting at ℃ for 20h, a yellow-green amino-terminated hyperbranched polymer is obtained; the ratio of the total mass of N,N-methylenebisacrylamide and diethylenetriamine to the mass of N,N-dimethylformamide is 1 :1.4;

[0044] 2) Add isophorone diisocyanate with a molar ratio of 1:1.3 and absolute ethanol to the solvent N,N-dimethylformamide, and react at 15°C for 2 hours to obtain a blocking agent, in which isophorone The mass ratio of the total mass of ketone diisocyanate and absolute ethanol to the mass of N,N-dimethylformamide is 1:1.3;

[0045] 3) Mix the amino-terminated hyperbranched polymer with a mass ratio of 3:1.5 and the end-capping agent, and react at 70° C. for 2 hours to obtain the end-capped hyperbranched polymer.

[0046] 4) Add the solvent N,N-dimethylformamide to the polyurethane raw material,...

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Abstract

The invention discloses a preparation method for a dyeable polyurethane film. The preparation method comprises the following steps: firstly, adding N, N-methylene bisacrylamide and diethylenetriamine into N, N-dimethylformamide to prepare an amino-terminated hyperbranched polymer; terminating the obtained product by using ethanol terminated isophorone diisocyanate; then, adding the terminated product into an N, N-dimethylformamide solution of polyurethane to prepare a casting film solution; pouring the casting film solution on a substrate; dipping in a coagulating bath to form a film by a wet process; and drying to obtain the dyeable polyurethane film. According to the film prepared by the method, as an active group -NH2 is introduced into a component of the film, bonding points of the dye are increased. Moreover, in an acidic solution, the film has positive charges, so that an anionic dye is gradually bonded with amino (P-NH3+) with positive charges in the film by virtue of ionic bonds to play a dyeing effect, thereby improving the dyeing rate and the color fastness. Meanwhile, the method is simple, convenient and feasible to operate, low in requirements on equipment and easy for industrial popularization.

Description

Technical field [0001] The invention belongs to the field of polyurethane materials, and specifically relates to a method for preparing a dyeable polyurethane film. Background technique [0002] Superfine fiber synthetic leather is a composite material of superfine fiber and PU elastomer developed in recent years. Because the microfiber has a denier and structure similar to that of collagen fibers, it has a three-dimensional woven highly contoured dermal structure, and has good mechanical properties, surpassing natural leather in terms of chemical resistance, water resistance, and mildew resistance. Microfiber synthetic leather has developed rapidly in recent years, but the dyeing of microfiber synthetic leather has been considered a problem by the industry. In actual production, the phenomenon of low quality products due to uneven dyeing is very common. The main reason is that the ultrafine fiber has a large specific surface area, strong chemical adsorption capacity, strong and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L75/04C08L87/00C08G83/00
Inventor 任龙芳王娜郭子东强涛涛王学川
Owner 汕头市亮彩新材料科技有限公司
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