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Cationic organosilicon modified waterborne PUA fabric coating adhesive with self crosslinking structure and preparation method thereof

A cationic, self-crosslinking technology, applied in the field of environmental protection fabric finishing, can solve the problem of no cationic water-based coating adhesive, and achieve the effect of eliminating the preparation steps, good water resistance and improving mechanical properties

Inactive Publication Date: 2016-11-23
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no cationic water-based coating adhesive available for coating finishing

Method used

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  • Cationic organosilicon modified waterborne PUA fabric coating adhesive with self crosslinking structure and preparation method thereof
  • Cationic organosilicon modified waterborne PUA fabric coating adhesive with self crosslinking structure and preparation method thereof
  • Cationic organosilicon modified waterborne PUA fabric coating adhesive with self crosslinking structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Synthesis of aqueous polyurethane emulsion containing polysiloxane segments and hydrazine-terminated

[0043] Add hydroxyl-terminated polysiloxane (molecular weight of about 2000, self-made) and polypropylene glycol ether glycol with molecular weight of 2000 (DL-2000D, Shandong Dongda Lanxing Chemical Industry Co., Ltd.) 1000ml four-neck flask, at 90-110 o C vacuum dehydration for 1h, the vacuum degree is about 0.060kPa.

[0044] The reaction was then cooled to 75 o C, pass into N 2 Protect. The polyisocyanate TDI was added and 2 drops of catalyst were added dropwise. After reacting for 2 hours, add hydrophilic chain extender N-methyldiethanolamine (N-MDEA) and chain extender 1,4-butanediol (BDO) for chain extension, at 80 o C for 2 hours. Add adipate dihydrazide (ADH) to end-cap the end-NCO, and react for 1 h. During this period, acetone was added appropriately to reduce the viscosity of the system. cool down to 40 oC Next, glacial acetic acid was added f...

Embodiment 2

[0053] According to the method of Example 1, using the same reaction conditions, the silicone-modified polyurethane emulsion and polyacrylate emulsion were prepared respectively, and the raw materials used and their ratios are shown in Table 2.

[0054] Table 2 Synthesis of silicone-modified polyurethane emulsion and polyacrylate emulsion formulations

[0055]

[0056] Mix the aqueous polyurethane emulsion and polyacrylate emulsion obtained above at a weight ratio of 1:1.8, and discharge after stirring for 15 minutes to obtain a ketone-hydrazine self-crosslinking silicone-modified PUA composite coating glue.

Embodiment 3

[0058] According to the method of Example 1, using the same reaction conditions, the silicone-modified polyurethane emulsion and polyacrylate emulsion were prepared respectively, and the raw materials used and their ratios are shown in Table 3.

[0059] Table 3 Synthesis of silicone-modified polyurethane emulsion and polyacrylate emulsion formula

[0060]

[0061] Mix the aqueous polyurethane emulsion and polyacrylate emulsion obtained above at a weight ratio of 1:1.7, and discharge after stirring for 15 minutes to obtain a ketone-hydrazine self-crosslinking silicone-modified PUA composite coating glue.

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PUM

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Abstract

The present invention discloses a preparation method of a cationic organosilicon modified waterborne PUA fabric coating adhesive with a self crosslinking structure, the method is as follows:(1)using polyisocyanate and hydroxyl-terminated polysiloxane for synthesis of an-NCO-group-terminated prepolymer;(2)adding polyether or polyester glycol for reaction;(3)reacting with a cationic hydrophilic chain extender for a period of time, and further reacting with adipic dihydrazide(ADH)to obtain a hydrazine-terminated cationic waterborne polyurethane emulsion;(4)using acrylate monomers and diacetone acrylamide(DAAM)for preparing a hydrazide-group-containing polyacrylate emulsion; and(5)mixing the hydrazine-terminated cationic waterborne polyurethane emulsion and the hydrazide-group-containing polyacrylate emulsion in a certain proportion to obtain the self-crosslinking cationic organosilicon modified waterborne PUA fabric coating adhesive. The self-crosslinking cationic organosilicon modified waterborne PUA fabric coating adhesive avoids the use of a harmful crosslinking agent, has the advantages of being environmental-friendly, high in water pressure resistance, good in mechanical properties, low in cost, and dyeable and the like, and can be used for coating finishing of nylon fabrics.

Description

technical field [0001] The invention relates to a preparation method of cationic organosilicon-modified water-based PUA coating glue with self-crosslinking structure, which belongs to the field of environment-friendly fabric finishing. Background technique [0002] Polyurethane coating adhesive has superior performance, low temperature resistance and high elasticity are its most significant advantages. It has many varieties and large performance changes. Its application in the coating industry is gradually increasing. With its excellent performance, it is gradually replacing polyacrylic coating adhesive. . The traditional polyurethane coating glue is mainly solvent-based, containing a large amount of harmful solvents such as toluene and DMF. With the improvement of environmental protection laws and regulations, it has become an inevitable trend for water-based polyurethane to replace solvent-based polyurethane. Applying water-based polyurethane to fabric coating has the ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/653D06M15/285
Inventor 纪凤龙狄剑锋刘裕文杜文琴
Owner WUYI UNIV
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