Polycyclic benzimidazole derivatives, an important class of compounds in organic electronics and photovoltaics, were prepared using a solvent-free “green” process based on heating carboxylic acid anhydrides and arylene diamines in the presence of zinc acetate in the solid state. Products were isolated and purified directly by train sublimation of the crude reaction mixtures. The reaction conditions
POLYMER COMPOSITION HAVING HEAT-ABSORBING PROPERTIES AND HIGH STABILITY TO WEATHERING
申请人:Meyer Alexander
公开号:US20120153241A1
公开(公告)日:2012-06-21
The invention relates to a polymer composition which absorbs infrared radiation (IR), containing a transparent thermoplastic plastic, an inorganic infrared absorber, also referred to as IR absorber hereinbelow, at least one inorganic nano-scale pigment, and the combination of at least two organic colouring agents of a specific structure, and to the preparation and use of the polymer compositions according to the invention and to products produced therefrom.
ORGANIC COLOURING AGENTS AND COLOURED POLYMER COMPOSITIONS WITH A HIGH STABILITY TO WEATHERING
申请人:Meyer Alexander
公开号:US20120152150A1
公开(公告)日:2012-06-21
The present invention relates to organic colouring agents with a high colour stability to weathering for thermoplastics. The invention furthermore relates to a polymer composition containing at least one thermoplastic and at least one organic colouring agent, preferably a combination of at least two organic colouring agents, of a specific structure. The invention moreover relates to the use of the colouring agents according to the invention for colouring polymer compositions, in particular for transparent formulations such as are required for the production of panes for use in buildings, motor vehicles and track vehicles or aircraft.
IR-TRANSPARENT SENSOR AND CAMERA SYSTEM FOR MOTOR VEHICLES
申请人:COVESTRO INTELLECTUAL PROPERTY GMBH & CO. KG
公开号:US20210382146A1
公开(公告)日:2021-12-09
A sensor system comprises a LiDAR unit, a camera for visible light and a cover through which light arrives at the LiDAR unit and the camera. The cover comprises a layer containing dyes.
The light transmission of the cover in the range from 380 nm to 780 nm is 3% to 25% and in the range from 380 nm to 1100 nm is 40% or more. The attenuation of the LiDAR signal by the cover is such that at least 65% of the original signal intensity reaches the LiDAR detector.
The layer containing dyes contains a composition comprising i) at least 70% by weight of a transparent thermoplastic polymer, ii) at least one green and/or red dye and iii) at least one red and/or violet dye.
The product of the sum of the weight % fractions of dyes ii) and iii) and the thickness of the layer containing dyes is 0.041 to 0.12 wt % mm.
Finally, the composition contains 0% to 0.0005% by weight of IR absorbers.