A kind of organosilicon modified amphoteric waterborne polyurethane emulsion and preparation method thereof

A water-based polyurethane and silicone technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as poor hand feeling, poor elasticity, hard water-based polyurethane film, etc., and achieve good fluidity and storage stability, crystallization High performance, fast solvent evaporation effect

Inactive Publication Date: 2016-10-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN103570915A and CN103360563A announce the synthetic method of high-solid-containing polyester type water-based polyurethane emulsion, and the prepared water-based polyurethane film is relatively hard, and feel is not good enough, and elasticity is relatively poor

Method used

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  • A kind of organosilicon modified amphoteric waterborne polyurethane emulsion and preparation method thereof
  • A kind of organosilicon modified amphoteric waterborne polyurethane emulsion and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0054] A silicone-modified amphoteric waterborne polyurethane emulsion. The formula composition and dosage are shown in Table 1. The specific preparation steps are as follows:

[0055] Add the formulated amount of polyoxypropylene glycol and sulfonic acid group-containing polyester diol into a polymerization reactor equipped with a digital display electric mixer and a thermometer. The temperature is raised to 110°C, and the water is removed by vacuum distillation and heat preservation. The water time is 2h. After the water removal is completed, the temperature is reduced to 60~70℃; the catalyst dibutyltin dilaurate and isophorone diisocyanate are added to the above polymerization reactor, the temperature is raised to 85℃, and the reaction is stirred for 3h; then the temperature is reduced to 60 ℃, add acetone, stir for 10min, add triethanolamine and 1,4-butanediol, stir for 3h; then cool to 50℃, add glacial acetic acid, stir for 0.5h; transfer the reaction product in the polymeriz...

Embodiment 2

[0059] A silicone-modified amphoteric waterborne polyurethane emulsion. The formula composition and dosage are shown in Table 2. The specific preparation steps are as follows:

[0060] Add the formulated amount of polyoxypropylene glycol and sulfonic acid group-containing polyester diol into a polymerization reactor equipped with a digital display electric mixer and a thermometer. The temperature is raised to 110°C, and the water is removed by vacuum distillation and heat preservation. The water time is 2h. After the water removal is completed, the temperature is reduced to 60~70℃; the catalyst dibutyltin dilaurate and isophorone diisocyanate are added to the above polymerization reactor, the temperature is raised to 85℃, and the reaction is stirred for 3h; then the temperature is reduced to 60 ℃, add acetone, stir for 10min, add triethanolamine and 1,4-butanediol, stir for 3h; then cool to 45℃, add glacial acetic acid, stir for 0.75h; transfer the reaction product in the polymeri...

Embodiment 3

[0064] A silicone modified amphoteric waterborne polyurethane emulsion, the formula composition and dosage are shown in Table 3. The specific preparation steps are as follows:

[0065] Add the formulated amount of polyoxypropylene glycol and sulfonic acid group-containing polyester diol into a polymerization reactor equipped with a digital display electric mixer and a thermometer. The temperature is raised to 110°C, and the water is removed by vacuum distillation and heat preservation. The water time is 2h. After the water removal is completed, the temperature is reduced to 60~70℃; the catalyst dibutyltin dilaurate and isophorone diisocyanate are added to the polymerization reactor, the temperature is raised to 80℃, and the reaction is stirred for 3.5h; then the temperature is reduced to 55℃, add acetone, stir for 10min, add triethanolamine and 1,4-butanediol, stir and react for 4h; then cool to 50℃, add glacial acetic acid, stir for 0.5h; transfer the reaction product in the poly...

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Abstract

The invention belongs to the technical field of a waterborne polyurethane emulsion and discloses an organosilicone-modified amphiprotic water-based polyurethane emulsion and a preparation method thereof. The preparation method comprises the following steps: firstly, adding polyesterdiol (containing a sulfonic acid group) and polyether polyol to a polymerization reactor, heating and carrying out reduced pressure distillation to remove water; adding polyisocyanate and a catalyst, carrying out stirred reaction; cooling, adding a solvent, a chain extender and a crosslinking containing a tertiary amine structure to further react; cooling and adding a neutralizer for neutralization to obtain an amine salt; adding water and a silane coupling agent to a reactant; carrying out high-speed shear emulsifying, adding a post chain extender and carrying out post chain extension reaction, and then carrying out reduced pressure distillation on the reactant to remove the solvent; and adding adjuvants such as a defoaming agent and a flatting agent, so as to obtain the organosilicone-modified amphiprotic water-based polyurethane emulsion. The organosilicone-modified amphiprotic water-based polyurethane emulsion disclosed by the invention is free of organic solvent residues basically, and is high in solid content, excellent in mechanical property and good in water resistance and heat resistance.

Description

Technical field [0001] The invention belongs to the technical field of aqueous polyurethane emulsions, and specifically relates to an organic silicon modified amphoteric aqueous polyurethane emulsion and a preparation method thereof. Background technique [0002] Polyurethane (PU) is a multifunctional polymer containing urethane structure (—NHCOO—). It has high bonding strength and peel strength, excellent impact resistance, low temperature resistance, oil resistance and abrasion resistance. Used in coatings, adhesives, leather finishing agents, inks and other fields. The water-based polyurethane is a binary colloidal system with water as the dispersion medium. Compared with solvent-based polyurethane, it has the advantages of non-toxic, non-flammable, and environmentally friendly. In recent years, with the improvement of environmental protection laws and regulations and the enhancement of people's environmental awareness and concern for their own health, the development of wate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/75C08G18/66C08G18/48C08G18/46C08G18/32C08G18/38C09D175/06C09D175/08C09J175/06C09J175/08
CPCC08G18/289C08G18/3206C08G18/3228C08G18/3281C08G18/4018C08G18/4676C08G18/4825C08G18/6607C08G18/6618C08G18/6622C08G18/755C09D175/04C09J175/04
Inventor 涂伟萍刘文济王锋
Owner SOUTH CHINA UNIV OF TECH
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