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Magnetic polyurethane soap-free emulsion for coating and preparation method thereof

A soap-free emulsion and water-based polyurethane technology, applied in the field of polymers, can solve the problems of product patterns, designs and colors not unique enough, individuality, wear resistance is not outstanding, decoration limitations, etc., to achieve excellent wear resistance, low cost, emulsion Highly stable effect

Inactive Publication Date: 2017-06-30
广东再设计创意文化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, the wear resistance of the existing coatings for leather and other products is not outstanding enough; its decorativeness is also relatively limited, and it is generally necessary to add additional pigments or other factors. There are many processes, and the patterns and colors of the obtained products are often not enough. unique, individual

Method used

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  • Magnetic polyurethane soap-free emulsion for coating and preparation method thereof
  • Magnetic polyurethane soap-free emulsion for coating and preparation method thereof
  • Magnetic polyurethane soap-free emulsion for coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1 This embodiment provides a magnetic polyurethane soap-free emulsion for finishing products such as leather, which is made of the following components in parts by weight:

[0035]

[0036] The water-based polyurethane emulsion is prepared by ultrasonic dispersion from the following parts by weight: 30-35 parts of polyester diol, 10-20 parts of HDI, 0.5-2 parts of organotin catalyst, 5 parts of DMPA -8 parts, NMP 18-22 parts, methylol propane 5-7 parts, acetone 20-30 parts, modified polyurethane soap-free emulsion chitosan nanoparticles 3-9 parts, ethylenediamine aqueous solution 15-20 parts.

[0037] The polyester diol is polycarbonate diol with a relative molecular weight of 2000; the mass fraction of the ethylenediamine aqueous solution is 10-12%; the modified polyurethane soap-free emulsion chitosan nanoparticles The particle size is 18-24nm.

[0038] The water-soluble epoxy resin is one of 681 water-soluble epoxy resin and 682 water-soluble epoxy res...

Embodiment 2

[0054] The magnetic polyurethane soap-free emulsion for finishing provided in this embodiment and its preparation method are basically the same as in Example 1, except that: the magnetic polyurethane soap-free emulsion for finishing is made of the following components in parts by weight:

[0055]

[0056] The water-based polyurethane emulsion is prepared from the following parts by weight by ultrasonic dispersion: 30 parts of polyester diol, 10 parts of HDI, 0.5 parts of organotin catalyst, 8 parts of DMPA, 18 parts of NMP, 7 parts of methylol propane, 20 parts of acetone, 6 parts of modified polyurethane soap-free emulsion chitosan nanoparticles, 20 parts of ethylenediamine aqueous solution.

[0057] Described polyester diol is the polycarbonate diol that relative molecular weight is 2000; The mass fraction of described ethylenediamine aqueous solution is 10%; The particle size of described modified polyurethane soap-free emulsion chitosan nano-particle The diameter is 24n...

Embodiment 3

[0073] The magnetic polyurethane soap-free emulsion for finishing leather and other products provided by this embodiment and its preparation method are basically the same as those in Examples 1 and 2, except that the magnetic polyurethane soap-free emulsion for finishing consists of the following parts by weight Components made:

[0074]

[0075] The water-based polyurethane emulsion is prepared from the following parts by weight by ultrasonic dispersion: 32 parts of polyester diol, 18 parts of HDI, 1.5 parts of organotin catalyst, 6 parts of DMPA, 20 parts of NMP, 6 parts of methylol propane, 25 parts of acetone, 3 parts of modified polyurethane soap-free emulsion chitosan nanoparticles, and 18 parts of ethylenediamine aqueous solution.

[0076] Described polyester diol is the polycarbonate diol that relative molecular weight is 2000; The mass fraction of described ethylenediamine aqueous solution is 11%; The particle size of described modified polyurethane soap-free emuls...

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Abstract

The invention discloses magnetic polyurethane soap-free emulsion for coating. The magnetic polyurethane soap-free emulsion comprises the following components in parts by weight: 20-30 parts of waterborne polyurethane emulsion, 3-6 parts of a K2S2O8 initiator, 10-20 parts of 3-allyloxy-2-hydroxypropyl sodium iodate, 25-35 parts of water-soluble epoxy resin, 20-28 parts of polyacrylamide and 10-20 parts of composite magnetic packing, wherein the waterborne polyurethane emulsion is prepared through an ultrasonic dispersion method. The invention further discloses a preparation method of magnetic polyurethane soap-free emulsion for leather coating; the method comprises the following steps: (1) preparing the composite magnetic packing; (2) preparing the waterborne polyurethane emulsion; (3) preparing the modified polyurethane soap-free emulsion. The magnetic polyurethane soap-free emulsion provided by the invention is environment-friendly, high in solid content, good in film-forming property, excellent in coating compactness and abrasive resistance, high in emulsion stability and suitable for a leather coating agent. The preparation method is low in cost, reasonable in process and suitable for large-scale production.

Description

technical field [0001] The invention relates to the field of polymers, in particular to a magnetic polyurethane soap-free emulsion for finishing leather and other products and a preparation method thereof. Background technique [0002] Soap-free emulsion polymerization refers to the emulsion polymerization process in which no emulsifier is added at all or only a small amount of emulsifier (its concentration is less than the critical micelle concentration CMC) is added during the reaction. Because soap-free emulsion polymerization can obtain latex particles with uniform size and clean surface, it can improve the compactness, water resistance, scrub resistance and adhesion of emulsion coatings, and has attracted much attention. But the stability of soap-free emulsion is an important factor limiting its large-scale industrialization. [0003] It is a potential market for the application of soap-free emulsions as finishing materials for leather and other products, but there are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D151/08C09D7/12C09D5/23C08F291/12C08F291/10C08G18/66C08G18/44
CPCC08F291/10C08F291/12C08G18/44C08G18/6659C08K3/22C08K3/34C08K2003/2272C09D7/61C09D151/08C08F216/1416
Inventor 冯蓉
Owner 广东再设计创意文化有限公司
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