Nanoscale waterproof film and preparation method thereof

A waterproof film, nano-level technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of affecting reliability, water leakage, gaps, etc., to achieve strong hydrophobicity and oil repellency, improve hydrophobicity, and strong heat dissipation sexual effect

Active Publication Date: 2014-04-30
深圳九合伟业科技有限公司
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Problems solved by technology

[0003] 1) Although the shell or protective cover can play a certain waterproof role, the waterproof structure will have gaps after long-term use or under certain water pressure, resulting in water leakage, and then water, beverages, oil mist and other liquids will If it enters the electronic product, if it is light, it will damage some internal configurations of the electronic product, such as circuit boards, memory, etc., which will affect the normal operation and reliability of use; It will be a loss from the perspecti

Method used

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  • Nanoscale waterproof film and preparation method thereof

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[0036] Based on the above raw material ratio, the present invention also provides a method for preparing a nanoscale waterproof film, comprising the following steps:

[0037]In the first step, according to the weight ratio, 30-60% of nano-fluoropolymer particles, 0.1-8% of polysiloxane and some odorless solvents are added into the reaction kettle and stirred until completely dissolved;; in this step The main chain of polysiloxane is composed of -Si-O-bond. At least one chemical bond in the silicon atom is connected with the fluoride ion of the nano-fluoropolymer particle, so that the two polymers are intertwined and chemically cross-linked through the molecular chain. Together, they can form a polymer complex with excellent comprehensive properties. Under the same process conditions, the increase of fluoropolymer particles alone does not significantly improve the hydrophobic performance, because the -CR group in the film has reached a certain surface-trapping ability, and then...

Embodiment 1

[0046] In the first step, 30% of nano-fluoropolymer particles, 2% of polysiloxane and 30% of odorless solvent are selected according to the weight ratio and added to the reactor for stirring until completely dissolved; in the second step, 15% of polyurethane is added to the reactor Continue to stir until the polyurethane is completely dissolved; the third step is to add 2% of nano-titanium dioxide and 3% of nano-zinc oxide into the reaction kettle, and add the remaining 13% of the odorless solvent, and disperse it by ultrasonic wave until there is no Granules: Add 4% wollastonite fiber, 0.8% dispersant and 0.2% preservative, stir until completely dissolved, and stand still for 20 minutes to obtain a waterproof liquid. Then carry out the fifth to eighth steps above, that is, to form a nanoscale film.

Embodiment 2

[0048] In the first step, 45% of nano-fluoropolymer particles, 5% of polysiloxane and 30% of odorless solvent are selected according to the weight ratio and added to the reactor for stirring until completely dissolved; in the second step, 15% of polyurethane is added to the reactor Continue to stir until the polyurethane is completely dissolved; the third step is to add 2% of nano-titanium dioxide and 3% of nano-zinc oxide into the reaction kettle, and add the remaining 15% of the odorless solvent, and disperse it by ultrasonic wave until there is no Granules: Add 4% wollastonite fiber, 0.8% dispersant and 0.2% preservative, stir until completely dissolved, and stand still for 20 minutes to obtain a waterproof liquid. Repeat the fifth to eighth steps above, that is, to form a nanoscale film.

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Abstract

The invention discloses a nanoscale waterproof film and a preparation method thereof. The waterproof film mainly comprises the following raw materials in percentage by weight: 30-60 percent of nano-fluorine polymer particles, 0.1-8 percent of polysiloxane, 5-15 percent of polyurethane, 40-70 percent of an odorless solvent, 1-10 percent of wollastonite fibers, 0.5-5 percent of nano-titanium dioxide, 1-8 percent of nano-zinc oxide and 0.2-1.5 percent of an additive, wherein the particle diameters of the nano-fluorine polymer particles are 50-100 nanometers. After a nanoscale liquid film is formed on an electronic product, liquid contacting with the film is condensed into water drops which fall off freely, so that the electronic product has completely the same function as normal use. By adopting the nanoscale film, objects can be prevented from being corroded by damp air, sweat, moisture and the like without influencing the appearances of electronic products or causing changes in the properties such as inherent properties, weights and optical performance of the electronic products.

Description

technical field [0001] The invention relates to the field of electronic waterproofing, in particular to a nanoscale waterproof film and a preparation method thereof. Background technique [0002] With the increasing durability requirements of electronic 3C products, waterproof treatment has become the choice of many electronic products. At present, most outdoor "three-proof" electronic products will emphasize their waterproofness. However, the waterproof technology of most electronic products on the market is to achieve waterproof through specially treated shells or protective sleeves. This waterproof technology has the following defects during use: [0003] 1) Although the shell or protective cover can play a certain waterproof role, the waterproof structure will have gaps after long-term use or under certain water pressure, resulting in water leakage, and then water, beverages, oil mist and other liquids will If it enters the electronic product, if it is light, it will d...

Claims

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Application Information

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IPC IPC(8): C09D127/16C09D175/04C09D7/12
Inventor 蒙其伟汪文珍
Owner 深圳九合伟业科技有限公司
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