Scratch resistant coating on cross linked polystyrene

A transparent thin coating or film to be applied on cross linked polystyrene blocks that will be in contact with an aqueous couple gel to improve scratch resistance and surface hardness with the following parameters.
The coating must be optically transparent or opaque but not coloured, from a acoustic point of view it must be has acoustic impedance confront able with water
May not change the sound properties of the polymer
The thickness of the coating must be in the order of 1 micron
The minimum acceptable hardness value is 55 / 60 HV (HV meaning Hardness in Vickers. It must be emphasized that we made a microhardness test.)
Shelf life must have a minimum of 2 years

For more details please click on the following link
http://www.plastemart.com/upload/literature/Scratchresistantcoating.asp

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