Process for scratch- and abrasion-resistant coating and physical matting of plastics substrates, more particularly polymethyl methacrylate, with nanocomposite coating material

A technology of methyl acrylate and nano-composite, which is applied to the device for coating liquid on the surface, thin material processing, coating, etc., can solve the problems that cannot be achieved, and achieve improved chemical resistance, good substrate adhesion, and good mechanical properties. performance effect

Inactive Publication Date: 2013-03-20
EVONIK ROEHM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Deeply matted PMMA surfaces with good transparency, with very high abrasion and scratch resistance, excellent resistance to chemicals, weathering and UV, hitherto not achievable with all known coating and application methods combination of properties, good wettability and pleasant haptics

Method used

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  • Process for scratch- and abrasion-resistant coating and physical matting of plastics substrates, more particularly polymethyl methacrylate, with nanocomposite coating material
  • Process for scratch- and abrasion-resistant coating and physical matting of plastics substrates, more particularly polymethyl methacrylate, with nanocomposite coating material
  • Process for scratch- and abrasion-resistant coating and physical matting of plastics substrates, more particularly polymethyl methacrylate, with nanocomposite coating material

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Embodiment

[0034] The following examples serve for illustration and better understanding of the invention, but this does not limit its scope or field of application in any way.

[0035] Next, semi-finished products coated with nanocomposite coatings of the present invention were compared with Evonik PLEXIGLAS from GmbH The samples were compared as comparative examples. Here, the composition of the PMMA semi-finished product is the same as its dimensions.

[0036] The coatings were applied by screen printing.

[0037] Two nanocomposite coatings with the same matrix composition (as shown in Table 1, which differ only in the proportion of thickening additives) were applied using a 120-34Y screen at an average layer thickness of 7-9 μm to Sample plates at 60°C or 90°C, where preliminary structures are produced. After a residence time of not more than one minute, by the method of the present invention according to figure 1 The surface of the coating was micro-wrinkled after being induc...

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Abstract

The invention relates to a process for the surface-finishing of plastics substrates, preferably polymethyl methacrylate (abbreviated hereinafter to PMMA), by coating with a clear coating material comprising nanoparticles (hereinafter nanocomposite coating material) and irradiating the same with vacuum UV light of wavelength 172 nm from an Xe* excimer lamp. This process leads to excellent adhesion of the coating substance on the substrate. It is moreover possible to give the coating surface a topography. The mechanical and chemical properties and performance characteristics of uncoated substrate are substantially exceeded when a substrate is coated in this way.

Description

technical field [0001] The present invention relates to plastic substrates, especially polymethyl methacrylate (hereinafter referred to as PMMA) by coating with nanoparticle-containing coatings, preferably transparent coatings, (hereinafter referred to as nanocomposite coatings) and using 172nm wavelength from A method of surface modification by irradiating it with vacuum UV light from a Xe* excimer lamp. This approach results in excellent adhesion of the coating to the substrate. In addition, it is possible to achieve a surface topography that produces a matt appearance and a pleasing haptic of the coated surface. Such coated substrates greatly outperform uncoated substrates in mechanical, chemical and application-technical properties. Background technique [0002] Like other thermoplastics, PMMA cannot meet all requirements due to its inherent properties. It is susceptible to stress cracking, especially after prior contact with solvents such as acetone or aliphatic alco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/06C08K9/06C09D183/04C08J7/043C08J7/046
CPCC08L2312/06C09D133/14C08J7/06C08K2201/011C08J7/047C08J2483/04C08J2333/10C09D183/04B05D5/02C08L33/08Y10T428/24446C08J7/0427C08J7/043C08J7/046
Inventor D·梅因哈德R·舒伯特E·比尔兹S·里默斯
Owner EVONIK ROEHM GMBH
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