POLYMETHYLMETHACRYLATE FILM HAVING PARTICULARLY HIGH WEATHER RESISTANCE AND HIGHLY EFFICIENT PROTECTION FROM ULTRAVIOLET RADIATION Russian patent published in 2012 - IPC C08K5/00 C08L33/00 C08K5/34 C08K5/3492 

FIELD: chemistry.

SUBSTANCE: polymer film consists of a poly(meth)acrylate matrix, also containing a viscosity modifier based on cross-linked poly(meth)acrylates. The viscosity modifier has a two- or three-layer, "core-cladding" type structure and mean particle diameter of 10-150 nm, weight ratio of poly(meth)acrylate to viscosity modifier of 30-70:70-30, wherein the mean molecular weight of the matrix ranges from 80000 to 180000 g/mol. The polymer film also contains UV radiation absorbers and additional UV stabilisers selected from sterically hindered amines. Described also is use of a polymer moulded article for applying coating on other polymer moulded articles or for making high-quality and durable surfaces of substrate materials. The stabiliser for protection from UV radiation and weather impact of the poly(meth)acrylate based film, having a viscosity modifier, contains UV radiation absorbers selected from a group comprising benzotriazole type compounds in amount of 0.1-10% and triazine type compounds in amount of 0.0-5%, and UV stabilisers selected from sterically hindered amines in amount of 0.1-5% in terms of the weight of the film.

EFFECT: obtaining a film having high viscosity and a dull surface for ensuring high elasticity and low light reflection of articles.

15 cl, 1 tbl, 15 ex