Silicon modified water-based acrylic emulsion, preparation method and application thereof

A water-based acrylic and silicon modification technology, applied in the direction of coating, can solve the problems of easy hydrolysis, polycondensation, product gelation, low grafting rate, etc., and achieve the effect of good mechanical properties and excellent mechanical strength.

Inactive Publication Date: 2019-07-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this grafting method is that the grafting rate is low, and an excessive amount of organosiloxane needs to be added to ensure that a sufficient amount of organosiloxane is grafted to the molecular weight.
The other is to use the double bond copolymerization of organosiloxane with double bond and acrylic acid monomer. It is easy to hydrolyze and polycondensate, causing the problem of product gel, such as patent application CN106009943A and CN106366228A

Method used

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  • Silicon modified water-based acrylic emulsion, preparation method and application thereof
  • Silicon modified water-based acrylic emulsion, preparation method and application thereof
  • Silicon modified water-based acrylic emulsion, preparation method and application thereof

Examples

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Embodiment 1

[0052] The present embodiment provides a kind of preparation method of silicon-modified aqueous acrylic acid emulsion, described method comprises the following steps:

[0053] (1) Preparation of modified mesoporous inorganic silica:

[0054] Mix 1g of cetyltrimethylammonium bromide CTAB, 3.5mL of NaOH (2M) and 480mL of deionized water at 80°C, and slowly drop into 5mL of tetraethoxysilane TEOS for 40 minutes. After dripping, keep it warm at 80°C for 2h to obtain a colloid, then centrifuge the obtained colloid, wash with absolute ethanol and water for 3 times, and bake at 80°C for 12h to obtain silicon dioxide (SiO 2 );

[0055] In order to remove the templating agent, the obtained silicon dioxide is dispersed in the dehydrated ethanol solution of concentrated hydrochloric acid, the mass volume ratio of silicon dioxide and the dehydrated ethanol solution of concentrated hydrochloric acid is 20mg / ml, and the dehydrated alcohol solution of the concentrated hydrochloric acid is ...

Embodiment 2

[0062] The present embodiment provides a kind of preparation method of silicon-modified aqueous acrylic acid emulsion, described method comprises the following steps:

[0063] (1) Preparation of modified mesoporous inorganic silica:

[0064] Mix 1g of cetyltrimethylammonium bromide CTAB, 3.5mL of NaOH (2M) and 480mL of deionized water at 80°C, and slowly drop in 5ml of tetraethoxysilane TEOS for 40 minutes. After dripping, keep it warm at 80°C for 2h to obtain a colloid, then centrifuge the obtained colloid, wash with absolute ethanol and water for 3 times, and bake at 80°C for 12h to obtain silicon dioxide (SiO 2 );

[0065] In order to remove the templating agent, the obtained silicon dioxide is dispersed in the dehydrated ethanol solution of concentrated hydrochloric acid, the mass volume ratio of silicon dioxide and the dehydrated ethanol solution of concentrated hydrochloric acid is 20mg / ml, and the dehydrated alcohol solution of the concentrated hydrochloric acid is Th...

Embodiment 3

[0072] The present embodiment provides a kind of preparation method of silicon-modified aqueous acrylic acid emulsion, described method comprises the following steps:

[0073] (1) Preparation of modified mesoporous inorganic silica:

[0074] Mix 1g of cetyltrimethylammonium bromide CTAB, 4mL of NaOH (2M) and 480mL of deionized water at 80°C, and slowly drop into 5ml of tetraethoxysilane TEOS for 40 minutes. After dripping, keep it warm at 80°C for 2h to obtain a colloid, then centrifuge the obtained colloid, wash with absolute ethanol and water for 3 times, and bake at 80°C for 12h to obtain silicon dioxide (SiO 2 );

[0075] In order to remove the templating agent, the obtained silicon dioxide is dispersed in the absolute ethanol solution of concentrated hydrochloric acid, the mass volume ratio of silicon dioxide and the absolute ethanol solution of concentrated hydrochloric acid is 25mg / ml, and the absolute ethanol solution of the concentrated hydrochloric acid is The volu...

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Abstract

The invention discloses a silicon modified water-based acrylic emulsion, a preparation method and an application thereof. The preparation method comprises the following steps: firstly, adopting a sol-gel process for preparing mesoporous inorganic silicon dioxide; using vinyl siloxane for modifying the mesoporous inorganic silicon dioxide, thereby acquiring the mesoporous inorganic silicon dioxideloaded with vinyl siloxane, namely, the modified mesoporous inorganic silicon dioxide; mixing the modified mesoporous inorganic silicon dioxide with acrylic monomer; triggering the vinyl siloxane loaded on the mesoporous inorganic silicon dioxide to react and polymerize with the acrylic monomer, neutralizing and filtering, thereby acquiring the silicon modified water-based acrylic emulsion. The silicon modified water-based acrylic emulsion prepared according to the invention has the characteristics of organic silicon and acrylic emulsion; after the silicon modified water-based acrylic emulsionis cured with HDI trimer, the silicon modified water-based acrylic emulsion can be applied to various substrate surfaces; a coating layer formed by the silicon modified water-based acrylic emulsion has excellent mechanical strength, acid-alkali resistance, water resistance and a certain lyophobic and oleophobic property.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, and in particular relates to a silicon-modified water-based acrylic emulsion and a preparation method and application thereof. [0002] technical background [0003] Water-based acrylic emulsion has very good gloss and color retention and weather resistance, and has been widely used in leather, paint, fiber processing, plastic products, metal anti-corrosion, wood wall decoration and other industries. [0004] The combination of silicone and acrylic emulsion can make up for the problems of poor mechanical properties and too soft coating of silicone, and can also improve the problems of insufficient water resistance and stain resistance of acrylic emulsion. Silicone-modified water-based acrylic emulsion has become a research and development hotspots. [0005] There are two ways to introduce silicone into water-based acrylic emulsion. One is to use organosiloxane containing active functio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F220/18C08F220/14C09D151/10
CPCC08F292/00C09D151/10C08F220/1811
Inventor 涂伟萍赵晓圳招嘉斯徐兰芳卢明
Owner SOUTH CHINA UNIV OF TECH
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