Foamable compositions for rotational molding

Details Foamable compositions for rotational molding Foamable compositions for rotational molding

1997-02-13

1999-07-27

Foelak, Morton

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 455, 264310, 521 51, 521142, 521143, 521149, 521137, C08J 934

Patent

active

059285842

ABSTRACT:
Novel molding compositions consisting essentially of a mixture of a skin-forming component and a foam core-foaming component physically dry-blended together. The skin-forming component comprises two distinct phases blended together, a high zero-shear viscosity material and a low zero-shear viscosity material. The foam core-forming component preferably comprises a foamable polymeric material including a suitable blowing agent. In a preferred embodiment, the three materials are selected from suitable homopolymers and copolymers of ethylene.

REFERENCES:
patent: 5366675 (1994-11-01), Needham
patent: 5783611 (1998-07-01), Strebel

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