PRODUCTION METHOD OF POLYCARBONATE MOULDINGS WITH DOUBLE-LAYER COATING Russian patent published in 2017 - IPC B32B27/08 

FIELD: technological processes.

SUBSTANCE: primer coating is formed on the polycarbonate substrate surface by applying 3.0-6.0% solution of polymethylmethacrylate in the mixture of chloroform and ethyl cellosolve with the viscosity of 3.7-7.3 mPas, containing 3.0-7.0 wt % Tinuvin 234. Dry the moulding with the primer coating up to the film thickness of 2.0-4.0 mcm, initially at room temperature for 3-10 minutes, then at 120°C for 5-10 minutes. On the primer coating cooled up to the room temperature apply the coating composition, consisting of the water-isobutanol solution of the methyltriethoxysilane with vinyltriethoxysilane mixture with further moulding heating up to the temperature of 120-130°C for 5-10 min and holding for curing at this temperature for 20-25 min.

EFFECT: simplification of technology and implementation of the polycarbonate moulding production process, its acceleration and productivity increase.

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