Stock material or miscellaneous articles – Composite – Of polycarbonate
Patent
1989-11-06
1991-11-05
Sluby, P. C.
Stock material or miscellaneous articles
Composite
Of polycarbonate
428520, 428522, 525148, 2641761, 427160, B32B 2736, B32B 2708, C08L 6900
Patent
active
050631128
ABSTRACT:
Multi-layer plastic elements containing a polycarbonate core, with a polymethacrylate layer containing a UV absorber, and modified to be impact-resistant, applied to the core, where the polymethacrylate plastic layer is composed of methacrylate copolymers, which form compatible mixtures with polycarbonate, especially the polycarbonate of bisphenol A, exhibit good adhesion between the polycarbonate and the polymethacrylate. The methacrylate copolymers are methyl methacrylate copolymers with (meth)acrylic monomers which contain carbocyclic substituents in the ester group. The protective layer containing UV absorber is applied to the polycarbonate plastic in thickness from 1 to 500 .mu.m by coextrusion or by lacquering.
REFERENCES:
patent: 3582398 (1971-06-01), Ringler
patent: 4576870 (1986-03-01), Liebler et al.
patent: 4666779 (1987-05-01), Curry
patent: 4707393 (1987-11-01), Vetter et al.
patent: 4749749 (1988-06-01), Munzer et al.
R. Gaechter and Dr. H. Mueller, Taschenbuch der Kunststoff-Additive, pp. 96-111, Carl Hanser Verlag (1979).
Fischer Jens-Dieter
Gross Heinz
Rhein Thomas
Siol Werner
Sufke Thomas
Rohm GMBH Chemische Fabrik
Sluby P. C.
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