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Polycarbonates with improved transmission

A polycarbonate, polyether polyol technology, applied in the field of polycarbonate with improved transmittance, capable of solving problems such as the influence of improvement in optical properties of polyols that are not implied

Inactive Publication Date: 2011-08-17
BAYER MATERIALSCIENCE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application neither discloses nor suggests the effect of the polyol on the improvement of the optical properties of the composition

Method used

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  • Polycarbonates with improved transmission
  • Polycarbonates with improved transmission
  • Polycarbonates with improved transmission

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0048]For the preparation of polycarbonates for use in the compositions of the present invention, see here, for example, Schnell, "Chemistry and Physics of Polycarbonates", Polymer Reviews, Vol. 9, Interscience Publishers, New York, London, Sydney 1964, D.C. PREVORSEK, B.T.DEBONA and Y.KESTEN, Corporate Research Center, Allied Chemical Corporation, Morristown, New Jersey 07960, "Synthesis of Poly(ester)carbonate Copolymers (poly(ester) carbonate copolymer synthesis)" , Journal of Polymer Science (Polymer Science Journal), Polymer Chemistry Edition, Vol. 19, 75-90 (1980), D.Freitag, U.Grigo, P.R.Müller, N.Nouvertne, BAYER AG, "Polycarbonates (polycarbonates )", Encyclopedia of Polymer Science and Engineering (Encyclopedia of Polymer Science and Engineering), Vol. 11, Second Edition, 1988, pp. 648-718, and Drs. U. Grigo, K. Kircher and P.R. Müller, " Polycarbonate", Becker / Braun, Kunststoff-Handbuch, Volume 3 / 1, Polycarbonate, Polyacetale, Polyester, Celluloseester (polycarbonat...

Embodiment

[0127] optical measurement

[0128] Haze and transmission according to ISO 13468 for 60×40×4mm 3 sheet determination.

[0129] Yellowness index (YI) is calculated according to ASTM E313.

[0130] Molecular weight determination:

[0131] Average molecular weights are determined by gel permeation chromatography (GPC) with calibration standards.

[0132] Preparation of the composition:

[0133] The compositions in Examples and Comparative Examples 1-16 were prepared as follows: 5 wt.% was prepared from The powder mixture composed of 3108 powder is added to 95wt.% pellets, thereby preparing the compositions described in the examples.

[0134] The composition according to the invention was prepared in a co-rotating twin-screw compounder (ZSK 25 from Werner & Pfleiderer) comprising metering units for the individual components, a screw diameter of 25 mm, a perforated nozzle for extruding melt strands, Compounded in a water bath and granulator unit that cools and solidi...

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Abstract

The present invention relates to a composition containing polycarbonate and 0.01 wt% to less than 0.30 wt% of polyol, polyether polyol, or combinations thereof.

Description

[0001] related application [0002] This application claims the benefit of German Patent Application No. 102009052363.4 filed November 7, 2009, which is hereby incorporated by reference in its entirety for all useful purposes. technical field [0003] The present invention relates to compositions comprising polycarbonate and at least one polyol and having improved optical properties. Background technique [0004] Transparent plastic molding compositions with high transmission and low haze are used in many applications, for example for the production of spectacle lenses with flexible focus or plastic headlight diffusers, which are preferably produced by injection moulding. These plastic molding compositions are also used in automotive glazing systems, which can be produced by injection molding or extrusion methods. Another field of application of these plastic molding compositions is the production of transparent architectural glazing systems. [0005] Haze in these materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L71/00C08L69/00
CPCC08L69/00C08K5/053C08L71/02C08L71/00C08L2666/22
Inventor B·克劳特M·普雷因
Owner BAYER MATERIALSCIENCE AG