Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Ultraviolet cured paint composition and preparation thereof

A technology of curing coatings and ultraviolet light, applied in the direction of polyurea/polyurethane coatings, coatings, instruments, etc., can solve the problems of dimensional deformation, high density of inorganic powder, temperature impact test of coating surface cracking, etc., to improve wear resistance. , the effect of ultra-high wear resistance and high hardness

Inactive Publication Date: 2008-10-01
BYD CO LTD
View PDF1 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the polyurethane acrylate with high functional group is polymerized under the action of ultraviolet light, the curing shrinkage rate is relatively large. After the proportion in the formula is increased, it is easy to cause cracking on the surface of the coating film and the failure of the temperature shock test, and the density of the inorganic powder is relatively high. , It is easy to cause the paint to settle and agglomerate, which reduces the storage performance of the paint
[0005] CN1777656A discloses a water-based wear-resistant coating, a heat-cured water-based coating using silicone resin as the main resin, and its invention point for improving wear resistance is to add an inorganic filler such as boron nitride; Polyurethane resin (PU) and fluoropolymer are used to improve the flexibility of the coating film and cannot be cured under ultraviolet light. At the same time, the thermal curing of silicone resin as the main resin generally has a baking temperature above 80 degrees Celsius, while mobile phones The keyboard is generally made of acrylonitrile-butadiene-styrene copolymer (ABS), and the temperature exceeding 80 degrees Celsius will cause dimensional deformation; secondly, the outermost layer of the mobile phone keyboard is sprayed with a film thickness of 8-10um. High, adding inorganic particles such as boron nitride will easily cause pitting on the surface, resulting in poor appearance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ultraviolet cured paint composition and preparation thereof
  • Ultraviolet cured paint composition and preparation thereof
  • Ultraviolet cured paint composition and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] The steps of the preparation method of the ultraviolet curable coating composition used for the transparent plastic parts of the mobile phone keyboard are conventional addition steps in the field: the polyurethane acrylate accounting for 35% to 60% of the total system and the polyurethane acrylate accounting for 10% to 20% of the total system The fluorine-modified urethane acrylate and the diluent solvent accounting for 10% to 40% of the total system are mixed, stirred until fully dissolved, and the first mixture is obtained.

[0042] Add reactive diluent monomers accounting for 10-20% of the total system into the above-mentioned first mixture, stir evenly, and place it in a sealed place for 5-8 hours to form the second mixture.

[0043] Then add 0.5% to 1.5% of the well-known additives in this field in the second mixture, the leveling agent of BYK company in Germany, the wetting and dispersing agent of EFKA company in Holland, the defoamer of Cognis company in Germany and...

Embodiment 1

[0047] Prepare the UV-curable coating composition as follows:

[0048] (1) Polyurethane acrylate resin (Nippon Synthetic Chemicals, UV7605B), fluorine-modified polyurethane acrylate (PF-3320, American OMNONA product), mixed with an organic solvent, dispersed evenly, to form the first mixture;

[0049] The organic solvent is: a mixture of toluene, ethyl acetate, butyl acetate, n-butanol, and cyclohexanone, wherein, toluene: ethyl acetate: butyl acetate: n-butanol: cyclohexanone=6: 2: 3: 2:1.

[0050] (2) Add reactive diluent monomer (domestic hexanediol diacrylate HDDA) into the first mixture, stir and leave it to stand to form the second mixture;

[0051] (3) Add additives to the second mixture, disperse evenly, and filter, and the filtrate is an ultraviolet light-curable coating composition. Among them, the additives are: photoinitiator Irgacure369, leveling agent F41 from Germany Cognis, wetting and dispersing agent Dispers 710;

[0052] The weight percentage of each comp...

Embodiment 2

[0054] The preparation steps are the same as in Example 1. Among them, the fluorine-modified polyurethane acrylate is PF-6320 from OMNOVA Company of the United States; the reactive diluent monomer is domestic dipentaerythritol hexaacrylate DPHA; the additives are: photoinitiator Irgacure184, leveling agent DEGO410 from Germany, wetting and dispersing Agent CFC-510;

[0055] The organic solvent is: a mixture of ethyl acetate: n-butanol: cyclohexanone: ethylene glycol ether acetate, wherein, ethyl acetate: n-butanol: cyclohexanone: ethylene glycol ether acetate=3:1: 1:2.

[0056] The weight percentage of each component is shown in Table 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

The present invention provides an uv curing coating compound and its preparing method, wherein, the weight percentage of the uv curing coating compound is: polyurethane acrylate 35-60%, reactive diluents 10-20%, uv photoinitiator 3-5%, promoter 0-1.5%, fluoride-containing modified polyurethane acrylic 10-20%, organic solvent 10-40%. The protective layer formed by the uv curing coating compound has high rigidity and excellent wear resistance, especially fit for mobile phone keyboard.

Description

technical field [0001] The invention belongs to the field of ultraviolet curing coatings, in particular to ultraviolet curing coatings for polycarbonate plastic surface coatings. Background technique [0002] The painting for manufacturing the mobile phone keyboard includes a color paint layer and a surface transparent paint. At present, most mobile phone keyboards use polycarbonate plastic as the base material. When spraying, thermoplastic acrylic resin is generally used as the color paint layer, and then a layer of UV-cured polyurethane acrylate coating is sprayed as a protective coating. The color paint layer refers to all the paint layers with color. For example, the primer is white and the middle paint is black. Laser engraving removes part of the black middle paint to reveal the white primer in the shape of numbers. The digital part of this mobile phone key is White, black the rest, and a final coat of UV-cured urethane acrylate paint as a protective coat. Among them...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D4/00G06F3/023
Inventor 刘萌
Owner BYD CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com