Polyurethane coating for mobile phone back shell and preparation method and application method thereof

A technology of polyurethane coatings and application methods, which is applied in the field of polyurethane coatings for mobile phone shells and its preparation, and can solve problems such as flying debris sticking to plates, mobile phone back shells easily sticking to dust, and coatings without antistatic properties. Achieve the effects of not easy to decompose and fail, excellent antibacterial and antistatic properties, and good antibacterial effect

Inactive Publication Date: 2019-10-22
协荣精密器件(东莞)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] During the cutting process of the mobile phone back shell composite plate coated with a conventional hard coating, flying debris will be generated at the cutting place. The coating has no antistatic performance, and the flying debris is easy to stick to the plate. Blow off part of the flying debris, but it is difficult to clean it completely; in addition, during the installation and use of the mobile phone, due to mutual friction, etc., the surface generates static electricity, causing the back shell of the mobile phone to easily stick to dust, which seriously affects the appearance of the surface; And because more and more parents choose to equip their children with mobile phones in order to facilitate contact with their children, and during the use of mobile phones, a large number of bacteria will be infected, because children's immunity is lower than that of adults, and they are prone to symptoms of bacterial infection, so , the development of a polyurethane coating with antistatic and antibacterial effects for mobile phone back shells is a problem that needs to be solved

Method used

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  • Polyurethane coating for mobile phone back shell and preparation method and application method thereof
  • Polyurethane coating for mobile phone back shell and preparation method and application method thereof
  • Polyurethane coating for mobile phone back shell and preparation method and application method thereof

Examples

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Effect test

preparation example 1-3

[0048] In Preparation Example 1-3, the cysteine ​​was selected from the cysteine ​​sold by Henan Yankang Food Additive Co., Ltd. with the product number 1011, and the trishydroxymethylaminomethane was selected from the product number 01 sold by Guangzhou Hongcheng Biotechnology Co., Ltd. of trishydroxymethylaminomethane.

preparation example 1

[0049] Preparation example 1: (1) Decoct clove leaves and water with a weight ratio of 1:6 twice, combine the water decoction, concentrate under reduced pressure to make a concentrated solution with a relative density of 1, and add a concentrated solution with a volume ratio of 8.5 : 10 of 3,4-dihydroxyphenethyl alcohol, mix well, leave standstill for 20h, get the supernatant;

[0050] (2) Add 40kg silver nitrate powder and 40kg cysteine ​​to 100kg water, stir for 1h, suction filter, add the supernatant obtained in step (1), mix well, add 20kg tris and 10kg sodium borohydride , aged, adjusted pH, centrifuged, washed three times with deionized water, and dried at 40°C to prepare modified nano-silver particles.

preparation example 2

[0051] Preparation example 2: (1) Decoct clove leaves and water with a weight ratio of 1:8 twice, combine the decoctions, concentrate under reduced pressure to make a concentrated solution with a relative density of 1.1, and the volume ratio of the addition to the concentrated solution is 8.7 : 10 of 3,4-dihydroxyphenethyl alcohol, mix well, leave standstill for 22h, get the supernatant;

[0052] (2) Add 50kg of silver nitrate powder and 45kg of cysteine ​​to 130kg of water, stir for 1.5h, filter with suction, add the supernatant obtained in step (1), mix well, add 25kg of tris and 15kg of hydroboration Na, aging, adjusting pH, centrifuging, washing with deionized water for 4 times, and drying at 43°C to obtain modified nano-silver particles.

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Abstract

The invention discloses a polyurethane coating for a mobile phone back shell and a preparation method and the application method thereof. The polyurethane coating for the mobile phone back shell is prepared from the following components: polyurethane resin, modified acrylate resin, polycarbonate, polyarylester, a styrene-acrylonitrile copolymer, a conducting material, an antibacterial agent, a wetting agent, a defoamer, a flatting agent, a dispersant and propanediol butyl ether. The conducting material is prepared from the following components: an ionic liquid, graphene, a carbon nanotube, tetrabromobisphenol A and maleic anhydride grafted polyethylene. The antibacterial agent is prepared by mixing the following components: modified nano silver particles, dodecyl dimethyl ammonium ethyl ammonium bromide, lithium carbonate, an organosilicon quaternary ammonium salt antibacterial agent and aluminum sulfate. The polyurethane coating for the mobile phone back shell has the advantage of being excellent in antistatic property and antibacterial property. The mobile phone back shell is not stained with dust in tailoring, mounting and using processes, and does not breed bacteria in the using process.

Description

technical field [0001] The invention relates to the technical field of coatings, more specifically, it relates to a polyurethane coating for a mobile phone casing and a preparation method and an application method thereof. Background technique [0002] With the development of society, mobile phones have become an indispensable part of our life. Due to the frequent use of mobile phones, a layer of paint is generally coated on the back shell of the mobile phone to play a protective role, so that the back shell of the mobile phone is wear-resistant and durable. Anti-scratch effect. [0003] Polyurethane coatings have strong wear resistance, excellent adhesion, oil resistance, acid and alkali resistance, and have a wide range of applications. Polyurethane coatings that are often sprayed on metal and plastic surfaces form a single-tone and smooth coating. [0004] In the prior art, a Chinese invention patent document with the application number CN200810108655.5 discloses a polyu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D133/04C09D169/00C09D167/00C09D125/12C09D5/24C09D5/14B05D3/02B05D3/06B05D5/08B05D7/24
CPCB05D3/0209B05D3/0236B05D3/067B05D5/08B05D7/24C08K2003/0806C08K2003/2241C08K2201/011C08L2205/035C09D5/14C09D5/24C09D175/04C08L33/04C08L69/00C08L67/00C08L25/12C08K13/06C08K9/10C08K3/042C08K3/041C08K3/08C08K7/28C08K3/22
Inventor 苏伟柴岡隆之
Owner 协荣精密器件(东莞)有限公司
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