ADVERSE WEATHER CONDITIONS RESISTANT FILM FOR COLOURING REFLECTIVE MOULDED ARTICLES YELLOW Russian patent published in 2010 - IPC C08J5/18 C08F120/18 G02B5/124 G02B5/22 C09B1/00 

FIELD: chemistry.

SUBSTANCE: invention relates to a film which is resistant to adverse weather conditions for colouring reflective moulded articles yellow, e.g. road signs. The film has a polymethylmethacrylate (PMMA) layer coloured by a yellow anthraquinone dye containing (made from) moulding material. The moulding material consists of A) 10-90 wt % bonded solid phase with glass transition point over 70°C, containing a) 80-100 wt % (from A) methylmethacrylate and b) 20-0 wt % lower alkylacrylate, and B) 90-10 wt % viscous phase distributed in the solid phase with glass transition point below -10°C, average particle size of the viscous phase less than 130 nm and particle size inhomogeneity of the viscous phase less than 0.5. The viscous phase contains c) at least 50 wt % (from B) lower alkylacrylate, d) 0.5-5 wt % crosslinking monomer with three or more ethylene-unsaturated radically polymerisable residues. The cloured polymethylmethacrylate layer conforms to chromaticity coordinates (x; y) on the 1931 CIE standard colorimetric system preferably in the interval 0.4 ≤ x ≤ 0.54 and 0.44 ≤ y ≤ 0.54.

EFFECT: obtained film has higher weather resistance, excellent optical properties and is easy to manufacture.

13 cl, 1 ex