Preparation method of chromatophilous polyurethane applied to superfine fiber synthetic leather

A technology of superfine fiber and synthetic leather, which is applied in the field of preparation of easy-to-dye polyurethane for superfine fiber synthetic leather, which can solve the problems of difficult dyeing, poor level dyeing, poor color fastness, etc., and achieve enhanced dyeing effect and improved hygienic performance , the effect of increasing the number

Active Publication Date: 2015-02-18
威海佐伦鞋材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the above-mentioned shortcoming of prior art, the object of the present invention is to provide a kind of preparation method of easy-dyeing polyurethane for superfine fiber synthetic leather, has overcome the defect that existing polyurethane resin is difficult to dye, poor level dyeing property and poor color fastness

Method used

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  • Preparation method of chromatophilous polyurethane applied to superfine fiber synthetic leather
  • Preparation method of chromatophilous polyurethane applied to superfine fiber synthetic leather
  • Preparation method of chromatophilous polyurethane applied to superfine fiber synthetic leather

Examples

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Effect test

Embodiment 1

[0029] see figure 1 , figure 2 and image 3 , a kind of preparation method of easy dyeing polyurethane for superfine fiber synthetic leather, comprises the steps:

[0030] 1) Weigh 39.9g of polytetrahydrofuran ether glycol 2000 (abbreviated as PTMG2000) and dissolve it in 60ml of dried N,N-dimethylformamide (abbreviated as DMF);

[0031] 2) Under the condition of nitrogen protection, according to the molar ratio of -NCO and -OH as 2:1, with 0.007% dibutyltin dilaurate (abbreviated as DBTDL) as the catalyst, add 8.88g of isophorone di Isocyanate (abbreviated as IPDI) was stirred and reacted with polyether polyol at 75°C for 1.5h to obtain -NCO-terminated polyurethane prepolymer (abbreviated as PPU-PTMG);

[0032] 3) Weigh 14.88g of amino-terminated hyperbranched polymer and 1.06g of benzaldehyde and dissolve them in 60ml and 8ml of dried N,N-dimethylformamide (abbreviated as DMF), respectively.

[0033] 4) Under the condition of nitrogen protection, according to -CHO and -...

Embodiment 2

[0037] see figure 1 , figure 2 and image 3 , a kind of preparation method of easy dyeing polyurethane for superfine fiber synthetic leather, comprises the steps:

[0038] 1) Weigh 39.9g of polyethylene glycol 2000 (abbreviated as PEG2000) and dissolve it in 65ml of dried N,N-dimethylacetamide (abbreviated as DMAC);

[0039] 2) Under the condition of nitrogen protection, according to the molar ratio of -NCO and -OH as 2:1, with 0.007% dibutyltin dilaurate (abbreviated as DBTDL) as the catalyst, add 8.88g of isophorone di Isocyanate (abbreviated as IPDI) was stirred and reacted with polyether polyol at 75°C for 1.5h to obtain -NCO-terminated polyurethane prepolymer (abbreviated as PPU-PEG);

[0040] 3) Weigh 35.72g of amino-terminated hyperbranched polymer and 2.12g of benzaldehyde and dissolve them in 150ml and 15ml of dried N,N-dimethylacetamide (abbreviated as DMAC), respectively.

[0041] 4) Under the condition of nitrogen protection, according to -CHO and -NH 2 The m...

Embodiment 3

[0045] see figure 1 , figure 2 and image 3 , a kind of preparation method of easy dyeing polyurethane for superfine fiber synthetic leather, comprises the steps:

[0046] 1) Weigh 39.9g of polypropylene glycol 2000 (abbreviated as PPG2000) and dissolve it in 65ml of dried N,N-dimethylformamide (abbreviated as DMF);

[0047] 2) Under the condition of nitrogen protection, according to the molar ratio of -NCO and -OH as 2:1, with 0.007% dibutyltin dilaurate (abbreviated as DBTDL) as the catalyst, add 8.88g of isophorone di Isocyanate (abbreviated as IPDI) was stirred and reacted with polyether polyol at 75°C for 1.5h to obtain -NCO-terminated polyurethane prepolymer (abbreviated as PPU-PPG);

[0048] 3) Weigh 14.88g of amino-terminated hyperbranched polymer and 1.06g of benzaldehyde and dissolve them in 65ml and 10ml of dried N,N-dimethylformamide (abbreviated as DMF), respectively.

[0049]4) Under the condition of nitrogen protection, according to -CHO and -NH 2 The mola...

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Abstract

The invention discloses a preparation method of chromatophilous polyurethane applied to superfine fiber synthetic leather. The preparation method comprises the following steps: firstly mixing polyether polyol with diisocyanate, stirring for reacting, adding a catalyst and taking an aprotic organic solvent as a solvent to prepare a polyurethane prepolymer; mixing an amino-terminated hyperbranched polymer with benzaldehyde, and stirring for reacting to prepare a hyperbranched polymer which is partially protected; subsequently mixing the hyperbranched polymer which is partially protected with the polyurethane prepolymer, and stirring for reacting to prepare hyperbranched polyurethane; finally mixing the hyperbranched polyurethane with a hydrochloric acid alcohol solution, stirring for reacting, washing by ethyl alcohol and acetone after the reaction is ended, drying in vacuum to prepare amino-containing hyperbranched polyurethane. Polyurethane resin synthesized by the amino-containing hyperbranched polyurethane contains active amino, so that the number of active hydrophilic groups is increased; the health performance is improved; the dye integration points are increased; anionic dye is integrated with the amino with positive charge, so that the dyeing effect is improved; the dyeing rate and the dyeing fastness are improved.

Description

technical field [0001] The invention relates to the technical field of polyurethane material processing, in particular to a method for preparing easy-to-dye polyurethane for superfine fiber synthetic leather. Background technique [0002] At present, microfiber synthetic leather is the most ideal material to replace natural leather. The base layer is a composite non-woven fabric material composed of superfine fibers and polyurethane (PU) elastomers. The superfine fibers are three-dimensionally cross-linked together to play a role of skeleton and support. The polyurethane is distributed around the fibers to make the entire synthetic leather base fabric form a whole. The surface layer is also made of polyurethane resin. The resulting product is comparable to high-grade natural leather in terms of internal microporous structure, appearance texture, physical properties, and wearing comfort. It has been widely used in clothing, manufacturing, etc. Shoes, car cushions and other ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/83C08G83/00C08G18/48C08G18/50C08G18/10
CPCC08G18/10C08G18/4081C08G18/4825C08G18/4833C08G18/4854C08G18/6415C08G18/755C08G2261/93C08G18/64
Inventor 任龙芳陈婷强涛涛王学川
Owner 威海佐伦鞋材有限公司
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