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A kind of organic-inorganic composite emulsion for coating and preparation method thereof

An inorganic composite and composite emulsion technology, applied in the field of coatings, can solve the problems of difficult dispersion, complex preparation process, poor stability, etc., and achieve the effects of simplifying the dispersion process, long-term antibacterial effect, and solving the instability of agglomeration

Active Publication Date: 2021-09-03
河北三棵树涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Directly adding nano-antibacterial particles will have a lot of problems in terms of stability and matrix resin compatibility. Patent CN 1616559A discloses a method for preparing a silver-containing antibacterial coating. The method used is similar to the above-mentioned self-cleaning coating. agent, this method still fails to solve the compatibility and stability problem of silver-based antibacterial agent and resin
There are also more studies on the use of porous silica to load nano-silver in order to solve the problem of system stability. Patent CN 107189585A attempts to use porous silica as a carrier to coat nano-silver, thereby solving the system stability and silver antibacterial durability. question
However, silica-coated nano-silver and resin exist in the coating formulation system through physical blending, and there are problems of difficult dispersion and system stability.
[0004] Added antibacterial coatings, the added nano antibacterial agent has compatibility problems with the coating formulation, and it is difficult to disperse and the stability is not strong
[0005] The preparation process of silica-loaded nano-silver is complicated, the cost is high, and the output is small. In addition, there are also problems such as difficult dispersion and poor stability in the process of preparing coatings.

Method used

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  • A kind of organic-inorganic composite emulsion for coating and preparation method thereof
  • A kind of organic-inorganic composite emulsion for coating and preparation method thereof
  • A kind of organic-inorganic composite emulsion for coating and preparation method thereof

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preparation example Construction

[0046] A kind of preparation method of organic-inorganic composite emulsion for coating, such as figure 1 As shown, the specific steps are as follows:

[0047] A. Preparation of modified silica sol

[0048] Add 0-50g of deionized water to 10-100g of silica sol, stir well, then add 0.2-5g of silane coupling agent KH560, stir at 55°C for 5h to obtain modified silica sol;

[0049] B, Preparation of Pickering emulsion

[0050] Using hydrophobically modified silica sol, monomers and initiators to form stable Pickering emulsions under high-speed dispersion and ultrasonic conditions, and prepare silica acrylic emulsions by free radical polymerization;

[0051] Concrete preparation process is as follows:

[0052] B1. Add 1-30g of modified silica sol into 170-199g of deionized water, stir and mix evenly, and make 200g of silica sol solution;

[0053] B2. Add the monomer to the silica sol solution, wherein the monomer is: 1-5g acrylic acid, 0-60g methyl methacrylate, 0-50g butyl acr...

Embodiment 1

[0066] A. Preparation of modified silica sol

[0067] Add 30g of deionized water to 50g of commercial silica sol (particle size: 20nm, solid content: 30%, pH: 4-6), after fully stirring, add 1g of silane coupling agent KH560, stir at 55°C for 5h, A modified silica sol was obtained.

[0068] B, Preparation of Pickering emulsion

[0069] Using hydrophobically modified silica sol, acrylic acid monomer and oil-soluble initiator to form a stable Pickering emulsion under high-speed dispersion and ultrasonic conditions, and preparing silica acrylic emulsion by thermal initiation;

[0070] Concrete preparation process is as follows:

[0071] B1. Add 10g of hydrophobically modified silica sol to 190g of deionized water, stir and mix evenly, and make 200g of silica sol solution;

[0072] B2. Mix 3g acrylic acid, 50g methyl methacrylate, 35g butyl acrylate, 12g isooctyl acrylate and 0.5g AIBN to prepare a mixture. Under high-speed dispersion conditions, 4000rpm, Shanghai Tianchen high...

Embodiment 2

[0080] Compared with Example 1, the main difference of Example 2 is that the addition of hydrophobically modified silica sol in the B step is increased to 50g.

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Abstract

The invention relates to an organic-inorganic composite emulsion for coating, which comprises the following components: silica sol, silane coupling agent, deionized water monomer, initiator, pH regulator, nano-silver sol and amino-modified nano-silver sol. The organic component of the present invention is an acrylate polymer, and the inorganic component is nano-silica and nano-silver. Among them, the emulsification effect of nano-silica is better after modification, and the prepared emulsion has good stability. At the same time, the modified Silica can better adsorb nano-silver; the organic component acrylate polymer, through the optimization of functional monomers, is bonded to the modified nano-silver to achieve a high loading rate of nano-silver. In the emulsion prepared by this method, nano-silica and nano-silver can exist around the latex particles more uniformly and stably, simplify the dispersion process for preparing the coating, and solve the problem of unstable aggregation of inorganic nanoparticles at the same time, so that the coating has a stable and long-lasting effect. Antibacterial effect.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to an organic-inorganic composite emulsion for coatings and a preparation method thereof. Background technique [0002] With the development of society and the continuous improvement of people's living standards, health and environmental protection have gradually become people's primary choice. Since microorganisms are ubiquitous in the environment, people's survival and health have been threatened by various bacteria all the time. Antibacterial coatings can be coated on the surface of various materials to play an antibacterial effect and protect people's health. [0003] At present, more studies are made on additive antibacterial coatings, which are antibacterial coatings made by adding antibacterial agents that can exist stably in the base material and combining certain processing techniques. Antibacterial agents used in additive antibacterial coatings mainly include inorganic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F292/00C08F220/14C08F220/18C08F220/06C08F2/44C09D133/12C09D5/14C09D7/62
CPCC08F2/44C08F220/14C08K2003/0806C08K2201/011C09D5/14C09D133/064C09D7/62C08K9/12C08K9/06C08K3/36C08K3/08C08F220/1804C08F220/1808C08F220/06
Inventor 姜美佳李维亚彭程秦玉猛付绍祥洪杰
Owner 河北三棵树涂料有限公司
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