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Hydrophobic organic and inorganic acrylate polymer emulsion with high silicon content and preparation method and application thereof

A polymer emulsion and acrylate technology, which is applied in the field of hydrophobic organic-inorganic high-silicon-content acrylate polymer emulsion and its preparation, can solve the problems of easy agglomeration, coating film hardness and insufficient hydrophobicity, etc., and achieve excellent scrub resistance , good storage stability, good appearance and stability

Active Publication Date: 2014-03-12
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of inorganic nano-SiO 2 Introduced into polymer emulsion, it is easy to agglomerate, SiO 2 Low content in the whole system and SiO 2 The surface contains some hydroxyl groups, which lead to problems such as insufficient hardness and hydrophobicity of the coating film. The invention provides a hydrophobic organic-inorganic high-silicon-content acrylate polymer emulsion and its application. The emulsion coating film has both inorganic materials and organic polymers Advantages, can be used to prepare coatings with good weather resistance, hydrophobicity, scrub resistance, stain resistance and high hardness properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) In parts by mass, add 2 parts of methanol, 3 parts of isopropanol, and 1 part of tridecafluorooctyltrimethoxysilane to 30 parts of silica sol, stir and react at 25°C for 6 hours, and obtain fluorine-containing modification Sexual silica sol;

[0040] (2) Mix 15 parts of methyl methacrylate and 15 parts of butyl acrylate to make monomer I, take 10% of mixed monomer I and 2 parts of 2-hydroxyethyl acrylate to make monomer II;

[0041] (3) Mix 60% of 40 parts of water, 50% of 0.1 part of octylphenol polyoxyethylene ether OP-10 and 0.1 part of sodium dodecylbenzenesulfonate (LAS), and 50% of 0.1 part of potassium persulfate Add the fluorine-containing modified silica sol reaction kettle obtained in step (1), stir for 15 minutes and then raise the temperature to 75 ° C, then slowly add the monomer I into the reaction kettle dropwise, drop it in 2 hours, and keep it warm for 15 minutes after the addition is completed. Minutes to get the emulsion;

[0042] (4) Continuous...

Embodiment 2

[0045] (1) In terms of parts by mass, add 4 parts of ethanol, 4 parts of isobutanol, and 2.5 parts of heptadecylfluorodecyltrimethoxysilane to 40 parts of silica sol, and stir and react at 30°C for 12 hours to obtain fluorine-containing modification Sexual silica sol;

[0046] (2) Mix 15 parts of ethyl methacrylate, 5 parts of butyl methacrylate and 25 parts of methyl acrylate to make monomer I, take 15% of mixed monomer I and 3 parts of 3-hydroxypropyl acrylate Mixed to make monomer II;

[0047] (3) 65% of 50 parts of water, 0.4 parts of octylphenol polyoxyethylene ether OP-15 and 0.2 parts of disodium dodecyl diphenyl ether sulfonate (DSB) mixture of 60%, 0.3 parts of sodium persulfate Add 60% of the fluorine-containing modified silica sol reaction kettle obtained in step (1), stir for 20 minutes and then raise the temperature to 77 °C, then slowly add monomer I into the reaction kettle dropwise, and drop it in 2.5 hours. After being incubated for 20 minutes, the emulsion ...

Embodiment 3

[0051] (1) In terms of parts by mass, add 6 parts of methanol, 6 parts of tert-butanol, and 3.5 parts of tridecafluorooctyltriethoxysilane to 50 parts of silica sol, and stir and react at 40°C for 18 hours to obtain fluorine-containing Modified silica sol;

[0052] (2) Mix 25 parts of propyl methacrylate with 15 parts of ethyl acrylate and 15 parts of propyl acrylate to make monomer I, take 20% of mixed monomer I and mix it with 4 parts of 5-hydroxypentyl acrylate to make into monomer Ⅱ;

[0053] (3) Add 70% of 65 parts of water, 65% of 0.8 parts of octylphenol polyoxyethylene ether OP-30 and 0.4 parts of sodium dodecyl sulfate (SDS) mixture, and 65% of 0.6 parts of ammonium persulfate to the step (1) In the obtained fluorine-containing modified silica sol reaction kettle, after stirring for 15 minutes, the temperature was raised to 78 ° C, and then the monomer I was slowly added dropwise to the reaction kettle, and the drop was completed in 3 hours, and kept for 25 minutes a...

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Abstract

The invention relates to the technical field of organic and inorganic compounds. In order to solve the problems that inorganic nano SiO2 introduced to the polymer emulsion is easy to agglomerate, the content of SiO2 is low in the whole system, and some hydroxyls are contained on the surface of SiO2 to result in deficiency in hardness and hydrophobicity of a film, the invention provides a hydrophobic organic and inorganic acrylate polymer emulsion with high silicon content and a preparation method and an application thereof. The emulsion is prepared from the following components in parts by weight: 30-60 parts of a silica sol, 5-15 parts of a cosolvent, 1-5 parts of a fluorine-containing silane coupling agent, 0.2-2 parts of an emulsifier, 0.1-1 part of an initiator and 40-80 parts of water. The emulsion film has the advantages of inorganic materials and organic high polymers and can be used for preparing coatings with good weather ability, hydrophobicity, scrubbing resistance and stain resistance, and high hardness performance.

Description

technical field [0001] The invention relates to the technical field of organic-inorganic compounds, in particular to a hydrophobic organic-inorganic high-silicon-content acrylate polymer emulsion and its preparation method and application. technical background [0002] As an environmentally friendly product, water-based acrylate emulsion has the characteristics of good gloss retention, excellent film-forming property, environmental protection and pollution-free, and is widely used in various fields such as architectural coatings and adhesives. However, most of the acrylate resin molecules have a linear structure and lack of cross-linking points, resulting in serious deficiencies in the hardness, heat resistance, scratch resistance and water resistance of the coating film. Modification of acrylate emulsion with organic fluorine and silicon is an important way to improve the performance of coating film. Fluorine atoms have high electronegativity, small atomic radius, large ch...

Claims

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Application Information

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IPC IPC(8): C08F220/14C08F220/18C08F220/28C08F2/26C08F2/30C08F2/44C08K9/06C08K3/36
Inventor 吴连斌裴勇兵韩庆雨汤龙程陈遒蒋剑雄来国桥
Owner HANGZHOU NORMAL UNIVERSITY
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