C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 201/00 (2006.01)
Patent
CA 2664643
The invention relates to a coated product containing a substrate (S) and a coating (A), the coating (A) being characterised in that it has a real component n of the refractive index of at least 1.70, an imaginary component k of the refractive index of not more than 0.016, a surface roughness, as the Ra value, of less than 20 nm and a scratch resistance of less than or equal to 0.75 µm scratch depth, wherein the real component and the imaginary component of the refractive index were measured at a wavelength of from 400 to 410 nm (i.e. in the wavelength range of blue laser), wherein the surface roughness as the Ra value was measured by means of AFM (atomic force microscopy), and wherein, for determining the scratch resistance, a diamond needle with a tip radius of 50 µm was moved over the coating at a rate of advance of 1.5 cm/s and with an applied weight of 40 g, and the resulting scratch depth was measured. The invention relates further to a process for the production of the coated products and to the use thereof in the production of optical data storage means, and also to the casting solution used to produce the coated products.
Bruder Friedrich-Karl
Hildenbrand Karlheinz
Oser Rafael
Bayer Materialscience Ag
Fetherstonhaugh & Co.
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