Abstract: The present invention relates to a moulded object made of a transparent and coloured plastic exhibiting a polychromatic effect, characterized in that the transparent plastic comprises from 0.1 to 1500 ppm of at least one fluorescent dye and from 50 to 10 000 ppm of at least one optical brightener. It also relates to the resin used for forming the moulded object. It also relates to a light device combining the said moulded object with at least one artificial light source which exhibits an emission in the region of excitation of the optical brightener, in particular in the 300-450 nm range, preferably 350-420 nm range, more preferably still 350-400 nm range.

Abstract: Disclosed is an improved weatherable thermoplastic composition. The composition is comprised of a copolymer of an alkyl acrylate or alkyl methacrylate and (methyl)methacrylate and a multi-stage, sequentially-polymerized impact modifier polymer. The copolymer is characterized by greater than 15 weight percent alkyl acrylate content. The multi-stage, sequentially-polymerized impact modifier is characterized by an elastomer stage, which is 55 percent by weight or greater of the impact modifier composition and is minimally crosslinked. The thermoplastic composition can be used in a wide range of film, sheet, or molded applications.

Abstract: The invention relates to a multi-layer acrylic composition having at least two impact modified layers. The outer layer is an acrylic layer containing impact modifiers having a particle size of less than 225 nm, and the impact modifiers in the inner thermoplastic layer have a particle size of greater than or equal to 225 nm. The invention also relates to multi-layer composites having the multi-layer acrylic composition on one or both sides. The multi-layer acrylic composition can also include blends of acrylic and fluoropolymers.

Abstract: Disclosed is a composite sheeting comprised of polystyrene having a thin protective layer of an acrylic ester polymer and a process for producing the composite sheeting. The process comprises joining a molten stream of each polymeric material in a single extruder discharge conduit such that there is produced a single molten stream having a reasonably well defined interface between the two types of polymeric material, and thereafter, passing the resulting single stream of material through a sheet-form extrusion die having its die lips generally aligned with the foregoing interface.

Abstract: Disclosed is an improved weatherable thermoplastic composition. The composition is comprised of a copolymer of an alkyl acrylate or alkyl methacrylate and poly(methyl)methacrylate and a multi-stage, sequentially-polymerized impact modifier polymer. The copolymer is characterized by greater than 15 weight percent alkyl acrylate content. The multi-stage, sequentially-polymerized impact modifier is characterized by an elastomer stage, which is 55 percent by weight or greater of the impact modifier composition and is minimally crosslinked. The thermoplastic composition can be used in a wide range of film, sheet, or molded applications.

Abstract: Disclosed is a composite sheeting comprised of polystyrene having a thin protective layer of an acrylic ester polymer and a process for producing the composite sheeting.

Abstract: The present invention is directed to methacrylic polymer compositions which may be used to form plastic products which have increased resistance to discoloration by sterilizing radiation, such as gamma or electron beam irradiation. The compositions, free from conventional ultraviolet stabilizers, contain .alpha.-hydroxyacids or esters thereof.

Abstract: Tertiary-alkyl-substituted melamines stabilize certain polymers against the deleterious effects of light and heat.

Abstract: Plastics prepared from blends of polymers of methyl methacrylate with heterogeneous core/shell polymers having an poly(alkyl acrylate) core and a poly(alkyl methacrylate)shell exhibit improved color when the heterogeneous core/shell polymer is treated with a reducing agent.