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Cation type aqueous full fluorine polyurethane textile finishing agent and preparing method thereof

A cationic polyurethane technology, applied in textiles, papermaking, fiber treatment, etc., can solve the problems of poor product stability, poor fabric washability, poor fiber bonding, etc., achieve good stability, good washability, reduce pollution and damage effect

Inactive Publication Date: 2011-04-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of cationic water-based perfluoropolyurethane textile finishing agent and preparation method thereof, to overcome the poor product stability existing in the prior art, poor combination with negatively charged fabric fibers and poor fabric washability Poor problem, but also to overcome the problem of environmental pollution in the preparation process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1, a kind of cationic water-based perfluoropolyurethane textile finishing agent is prepared by the following method, and the preparation method comprises the following steps in turn:

[0033] Step 1: Preparation of polyurethane prepolymer: put 90g of hexamethylene diisocyanate (HDI), 33g of polypropylene glycol (molecular weight 2000, dried) and 5g of triethanolamine into the reactor in turn, and after passing through nitrogen to remove oxygen, stir , add 10 g of acetone solvent, and react at a constant temperature of 60° C. for 2 hours to form a polyurethane prepolymer.

[0034] Step 2: Preparation of perfluoroalkyl-terminated polyurethane: heat up the polyurethane prepolymer to 70°C, add 150g of perfluoroalkyl ethyl butanol for capping reaction, and add 0.4g of dibutyltin dilaurate catalyst, and react for 3 hours , forming a perfluoroalkyl-terminated polyurethane.

[0035]Step 3: Cool down to 50°C, add 4.5g dimethyl carbonate to ionize, and the reaction ti...

Embodiment 2

[0036] Embodiment 2, a kind of cationic water-based perfluoropolyurethane textile finishing agent is prepared by the following method, and the preparation method comprises the following steps in turn:

[0037] Step 1: Prepare polyurethane prepolymer: 120g isophorone diisocyanate (IPDI), 40g polytetrahydrofuran ether glycol (molecular weight 2000, dried) and 8gN-isopropyldiethanolamine are dropped into reactor successively, pass After entering nitrogen to remove oxygen, stir, add 10 g of butanone solvent, and react for 3 hours at a constant temperature of 65° C. to form a polyurethane prepolymer.

[0038] Step 2: Preparation of perfluoroalkyl-terminated polyurethane: heat up the polyurethane prepolymer to 75°C, add 170g of perfluoroalkyl ethyl hexanol for capping reaction, and add 0.4g of stannous octoate catalyst, react for 2.5 hours to form Perfluoroalkyl terminated polyurethane.

[0039] Step 3: Cool down to 45°C, add 6.5g dimethyl succinate to ionize, and the reaction time...

Embodiment 3

[0040] Embodiment 3, a kind of cationic water-based perfluoropolyurethane textile finishing agent is prepared by the following method, and the preparation method comprises the following steps in turn:

[0041] Step 1: Prepare polyurethane prepolymer: put 133g diphenylmethane diisocyanate (MDI), 65g polycaprolactone (molecular weight 4000, dried) and 6g N-methyldiethanolamine into the reactor successively, and feed nitrogen After deoxygenation, stir, add 15 g of tetrahydrofuran solvent, and react at a constant temperature of 70° C. for 5 hours to form a polyurethane prepolymer.

[0042] Step 2: Preparation of perfluoroalkyl-terminated polyurethane: heat up the polyurethane prepolymer to 75° C., add 216 g of perfluoroalkyl ethyl octanol for capping reaction, and add 0.5 g of zinc naphthenate catalyst, and react for 3.5 hours. Forms perfluoroalkyl-terminated polyurethanes.

[0043] Step 3: Cool down to 55°C, add 6.5g dimethyl malonate to ionize, and the reaction time is 1.5 hour...

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Abstract

The invention belongs to the filed of fine chemicals and preparation technology thereof, more particularly relates to a cationoid aqueous perfluorinated polyurethane textile finishing agent and a preparation method thereof. The invention aims at overcoming the problems in the prior art that product stability is poor, the combination between the product and fiber textile with negative charge is poorer and the washability of the textile is poorer, simultaneously overcoming the problem of environment pollution existing in the preparation technology. The aim of the invention is realized as follows: the cationoid aqueous perfluorinated polyurethane textile finishing agent is prepared by the following method which sequentially comprises the following steps of: (1) preparing a tertiary amine type polyurethane prepolymer containing hydrophilic group; (2) preparing perfluorinated alkyl end capping polyurethane; and (3) preparing perfluorinated alkyl end capping quaternary ammonium salt type cation aqueous polyurethane. The invention has the advantages of good water proof property, good stability, good hydrophobic and oleophobic property and environment-friendly and simple and convenient preparation technology.

Description

Technical field: [0001] The invention belongs to the technical field of fine chemicals and their preparation, and in particular relates to a cationic water-based perfluoropolyurethane textile finishing agent and a preparation method thereof. Background technique: [0002] Fluorine-containing fabric finishing agent is internationally recognized as an excellent fabric finishing agent. Compared with traditional ordinary finishing agents, it has obvious advantages in hydrophobicity, oil repellency, antifouling, water resistance, friction resistance and corrosion resistance. Advantages, great development prospects and promotion value, has been the world's attention. [0003] Fluorine-containing polyurethane is a new type of fabric finishing agent functional material, which is prepared by modifying and modifying with fluorine elements by various means. The introduction of perfluorinated groups into the polyurethane molecular chain not only maintains the original characteristics o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/576C08G18/83
Inventor 沈一丁李培枝李刚辉杨晓武唐新
Owner SHAANXI UNIV OF SCI & TECH
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