Multilayer polymeric coextruded slabs and structural shapes

Details Multilayer polymeric coextruded slabs and structural shapes Multilayer polymeric coextruded slabs and structural shapes

1988-04-14

1989-09-19

Ives, P. C.

Stock material or miscellaneous articles

Composite

Of polycarbonate

4284239, 4284237, 4284244, 4284247, 4284248, 428448, 428451, 428483, 428493, 428495, 2641761, B32B 2736, B32B 2708, B29D 702

Patent

active

048680583

ABSTRACT:
Multilayer polymeric coextruded slabs and structural shapes obtained by contemporaneous extrusion of different polymers in a single extrusion head wherein at least one of the different layers consists of a lamina of a vinyl-aromatic polymer containing up to 20% by weight of an ethylenically unsaturated nitrile.
The present invention relates to multilayer polymeric coextruded slabs and structural shapes and to the process for obtaining them.
More particularly, the present invention relates to multilayer polymeric coextruded slabs and structural shapes wherein the adhesion is performed by coupling to the polymeric layers a sheet of a vinyl-aromatic polymer containing an ethylenically unsaturated nitrile.

REFERENCES:
patent: 4405547 (1983-09-01), Koch et al.
patent: 4483812 (1984-11-01), Hahn et al.
*British application No. '907 is the English language equivalent to the German patent.

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