The invention relates to methods for producing polymer compositions using preparations of nanoparticulate IR absorbers and to polymer compositions produced in such a way. The invention further relates to uses of said polymer compositions, for example, in heat management or in agriculture, in particular as greenhouse films. The invention further relates to molded bodies, in particular films containing such polymer compositions.

Polymer compositions containing nanoparticulate ir absorbers

Disclosed is a transparent multilayer article comprising a core layer comprising a thermoplastic carbonate polymer; a first layer comprising a carbonate thermoplastic polymer and an infrared (IR) absorbing additive; and a second layer comprising a thermoplastic carbonate polymer and a ultraviolet (UV) absorbing stabilizer, wherein the first layer does not contain an UV absorbing additive and the second layer does not contain an IR absorbing additive. Disclosed herein too, is a method for manufacturing a transparent multilayer article comprising melt blending a first thermoplastic carbonate polymer composition to produce a core layer; melt blending a second thermoplastic carbonate polymer composition with an IR absorbing additive to produce a first layer; and melt blending a third thermoplastic carbonate polymer composition with an UV absorbing stabilizer; combining the core layer, first layer, and second layer such that the first layer is disposed between the core layer and the second layer such that a first surface of the first layer is in intimate contact with a first surface of the core layer and a second surface of the first layer is in intimate contact with a first surface of the second layer.

Transparent multilayered carbonate articles and method to manufacture thereof

An embodiment of the present invention relates to a composition comprising a) at least one transparent thermoplastic material; b) at least one inorganic IR absorber comprising at least one boride compound present in an amount of from 00015 wt % to 0015 wt %, calculated as solids content of boride in the total polymer composition; and c) at least one inorganic, nano-scale pigment present in an amount of from 00008 wt % to 00035 wt %, based on the total composition; and d) optionally further additives

Polymer composition having heat-absorbing properties and improved colour properties

The invention relates to an infrared radiation (IR)-absorbent polymer composition containing a transparent thermoplastic, an inorganic infrared absorber, and at least one inorganic nanoscale pigment, to the production and use of the polymer compositions according to the invention, and to the products produced therefrom. The invention especially relates to polymer compositions containing a. at least one transparent thermoplastic, b. at least one inorganic IR-absorber from the group of the tungsten compounds in a part of between 0.0075 wt. % and 0.0750 wt.-% calculated as the solid part of tungstate in the whole polymer composition; and c. at least one inorganic, nanoscale pigment in a part of between 0.0005 wt. % and 0.0035 wt. % in relation to the whole composition; and d. optionally other additives.

Polymer composition having heat-absorbent properties and improved dyeing properties

The invention relates to an infrared radiation (IR)-absorbing polymer composition containing a transparent thermoplastic material, an inorganic infrared absorber (IR absorber), an optional inorganic nanoscale pigment, and a combination of at least one organic colorant having a special structure. The invention also relates to the production and use of the claimed polymer compositions and to the products made therefrom. The invention particularly relates to compositions having high stability - especially also high color stability - against weathering in both the visible range and the IR range. The invention further relates to the use of the claimed polymer composition containing said IR absorber/colorant combinations to produce panes for use in buildings, motor vehicles, and railroad vehicles or aircraft.

Polymer composition having heat-absorbing properties and high resistance to weathering

This invention provides a polycarbonate resin composition comprising 100 parts by weight of an aromatic polycarbonate resin having a terminal hydroxyl group concentration in the range of 100 to 1800 ppm and 0.0001 to 5 parts by weight of fine particles of boride of at least one metal selected from the group consisting of La, Ce, Pr, Nd, Tb, Dy, Ho, Y, Sm, Eu, Er, Tm, Yb, Lu, Sr and Ca. A hot radiation shielding molded product produced by molding the polycarbonate resin composition is also provided. In particular, the polycarbonate resin composition and hot radiation shielding molded product have low haze, excellent transparency, low solar radiation transmittance, satisfactory hot radiation shielding properties (particularly the function of permitting the transmission of visible light and selectively shielding infrared light), and excellent mechanical strength and heat stability on melting and thus are suitable for use, for example, in window glass for general buildings or vehicles, roof materials for arcades, carports and the like, optical materials such as infrared cut filters, and agricultural films.

o Mitsubishi Engineering-Plast Higashiizumi

Papers

Polycarbonate resin composition and hot radiation shielding molded product