POLYCARBONATE HAVING IMPROVED THERMAL AND MECHANICAL PROPERTIES AND REDUCED COEFFICIENTS OF THERMAL EXPANSION
申请人:Heuer Helmut-Werner
公开号:US20110151262A1
公开(公告)日:2011-06-23
The present invention relates to thermoplastic high-Tg polycarbonates and moulding materials which are distinguished by improved thermal properties and improved mechanical properties, in particular by reduced thermal expansion. The present invention furthermore relates to a process for the preparation of these polycarbonates. In particular, this invention relates to polycarbonates which the structural unit which derives from phthalimide of the formula (I) and polycarbonate compositions and moulding materials therefrom as well as a process for the preparation of these polycarbonates, and the use thereof, in particular as reflectors and display substrates.
Light-scattering sheet having high light transmission and improved antistatic properties
申请人:Rudiger Claus
公开号:US20070060681A1
公开(公告)日:2007-03-15
A solid sheet comprising transparent polycarbonate matrix, particles of a transparent polymer and an antistatic agent is disclosed. Characterized in that the refractive index of said matrix differs from that of said polymer, the sheet is suitable in making diffuser plate in flat screens.
Light-scattering moldings with high light transmission
申请人:Rudiger Claus
公开号:US20070060704A1
公开(公告)日:2007-03-15
A solid sheet comprising 80 to 99.99 wt. % of a transparent polycarbonate having weight average molecular weight of 15,000 to 21,000 g/mol, specifically excluding 18,000 g/mol, and 0.01 to 20 wt. % of transparent polymeric particles having an optical density which differs from that of the polycarbonate is disclosed. The sheet is particularly suitable as a diffuser in flat screens.
Mold multilayered sheet for use as a diffuser in flat screens
申请人:Rudiger Claus
公开号:US20070224367A1
公开(公告)日:2007-09-27
A multilayer sheet suitable for use as a diffuser in flat screens is disclosed. The sheet includes at least one base layer (B) and at least one outer layer (A) wherein (B) comprise a transparent thermoplastics material and transparent polymeric particles, with the proviso that the refractive index of the material and particles differ one from the other, and wherein said (A) comprise a transparent polycarbonate and a bismalonate UV absorber.
MULTI-WALL SHEET WITHOUT THE TRIANGLE EFFECT, COATED BY COEXTRUSION
申请人:Rübeck Jakob
公开号:US20110008579A1
公开(公告)日:2011-01-13
Gussetless multi-wall sheets are prepared using a coextrusion process which entails feeding part of the base material directly into and via the male insert of the extrusion die thereby producing the gussetless sheet.