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Organic/inorganic hybrid hardening agent, and preparation method and application thereof

A hardening agent and inorganic technology, applied in the field of wear-resistant and scratch-resistant protective coatings, can solve the problems of affecting the transparency of the coating, failing to achieve performance, and difficulty in dispersing, and achieve simple manufacturing process, high production efficiency, and limited dosage. Effect

Inactive Publication Date: 2013-11-13
东莞上海大学纳米技术研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the amount of nano fillers should be controlled within a reasonable range: if the amount is too large, it will be difficult to disperse in the paint and affect the transparency of the paint. At the same time, the cost will increase and there will be problems of particle peeling; if the amount is too small, the expected performance cannot be achieved.

Method used

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  • Organic/inorganic hybrid hardening agent, and preparation method and application thereof
  • Organic/inorganic hybrid hardening agent, and preparation method and application thereof
  • Organic/inorganic hybrid hardening agent, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] The organic / inorganic hybrid hardening agent provided in this embodiment is made of the following raw materials in weight percentage:

[0032]

[0033] The preparation method of the aforementioned organic / inorganic hybrid hardening agent comprises the following steps:

[0034] (1) Prepare raw materials: each component of the raw material and its weight percentage are as follows:

[0035]

[0036] (2) Preparation of organic / inorganic hybrid hardening agent:

[0037] First, add silica sol and solvent into the three-necked flask, and then add the silane coupling agent containing unsaturated double bonds dropwise. Secondly, use an acidic catalyst to adjust the pH value to 3-4. Under certain conditions, after reacting for 3 to 6 hours, add a reactive diluent. Finally, add the above mixed solution into a single-necked flask. , continue to evaporate until no distillate is distilled out, then filter through gauze, bottle and age for 24 hours to obtain a solvent-free org...

Embodiment 2

[0046] The organic / inorganic hybrid hardening agent, preparation method and application provided in this example are basically the same as those in Example 1, except that:

[0047]First prepare the organic / inorganic hybrid hardening agent: add 200g of silica sol and 108.6g of ethanol to a 500ml three-necked flask, add 7.4g of vinyltrimethoxysilane dropwise, adjust the pH to 3-4 with 7.1g of HAc, and stir After reacting for 3-6 hours, add 72.4g of 1,6-hexanediol diacrylate, transfer the above mixture to a one-necked flask, distill under reduced pressure at 80°C until a white solid appears, add 32.6g of ethanol and continue to evaporate until there is no distillate distilled. Filter through gauze, bottle and age for 24 hours to obtain a solvent-free organic / inorganic hybrid hardening agent.

[0048] Preparation of UV Curable Nanocomposite Coating UV-V with the Prepared Organic / Inorganic Hybrid Hardener 1 : 16g of organic / inorganic hybrid hardening agent, 19.2g of polyurethane ...

Embodiment 3

[0050] The organic / inorganic hybrid hardening agent provided in this example and its preparation method and application are basically the same as those in Examples 1 and 2, except that:

[0051] First prepare the organic / inorganic hybrid hardening agent: add 200g of silica sol and 108.6g of ethanol to a 500ml three-necked flask, add 12.4g of γ-methacryloxytrimethoxysilane dropwise, and adjust the pH to 3 with 7.1g of HAc -4. After stirring and reacting for 3-6 hours, add 72.4g of 1,6-hexanediol diacrylate, transfer the above mixed solution to a one-necked flask, distill under reduced pressure at 80°C until a white solid appears, add 32.6g of ethanol and continue Evaporate until no distillate distills. Filter through gauze, bottle and age for 24 hours to obtain the organic / inorganic hybrid hardening agent.

[0052] Preparation of UV Curable Nanocomposite Coatings UV-K with the Prepared Organic / Inorganic Hybrid Hardener 1 .

[0053] Mix and stir 16g of organic / inorganic hybri...

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Abstract

The invention discloses an organic / inorganic hybrid hardening agent. The hardening agent is characterized by being prepared from the following raw materials by weight: 10 to 50% of a silica sol, 0.1 to 60% of a solvent, 1.5 to 15% of a silane coupling agent containing an unsaturated double bond, 0.1 to 2% of an acidic catalyst and 12 to 70% of an active diluent. The invention further provides a preparation method for the hybrid hardening agent. The preparation method comprises the following steps: after preparation of the raw materials, adding the silica sol and the solvent, then adding the silane coupling agent drop by drop, adjusting a pH value by using the acidic catalyst, carrying out stirring, then adding the active diluent, carrying out rotary evaporation and cooling, continuing evaporation until no fraction is evaporated and then carrying out bottling and aging. The invention also discloses application of the hardening agent in a coating. The hardening agent is used as a film forming substance for a UV-cured nanometer composite coating and for preparation of wear-resistant and scrape-resistant coatings on the surfaces of resin eyeglass and optical discs. According to the invention, the silica sol is modified by using the silane coupling agent containing the unsaturated double bond through a sol-gel process, and a prepared coating has the advantages of environment friendliness, high transparency, high hardness, good wear resistance, etc.

Description

technical field [0001] The invention belongs to the field of coatings, and in particular relates to a solvent-free organic / inorganic hybrid hardening agent, a preparation method and its application in UV-curable nanocomposite coatings, in particular to wear-resistant and scratch-resistant protective coatings on plastic surfaces. Background technique [0002] Due to the advantages of light weight, easy processing, and abundant resources, plastic materials have gradually replaced traditional materials, especially in automobiles, home appliances and other industrial fields. Among them, transparent plastics are widely used in aviation, optical instruments and other fields because of their good electrical insulation and excellent optical properties. However, plastic products have problems such as easy aging, poor wear resistance and scratch resistance. In recent years, a large number of paint workers have devoted themselves to research and development of plastic coatings to impro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D7/12C08J7/04
Inventor 施利毅孙小英杭建忠康婧玲金鹿江
Owner 东莞上海大学纳米技术研究院
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