초록 ▼

A homogeneous composite material comprising at least one external layer of thermosetting polymer, a layer of lightened thermoplastic polymer, and intermediate between the two layers, a homogeneous layer formed by polymerizing a monomer which is a diluent for the said lightened polymer; such that the

A homogeneous composite material comprising at least one external layer of thermosetting polymer, a layer of lightened thermoplastic polymer, and intermediate between the two layers, a homogeneous layer formed by polymerizing a monomer which is a diluent for the said lightened polymer; such that the monomer polymerizes to form an intimate blend at the interface of said polymers. The invention also comprises a process for producing the above said composite material.

대표청구항 ▼

A process for the manufacture of a composite material comprising: (a) passing a lightened thermoplastic shaped material whose external surface has a density higher than the core thereof through a zone having a temperature of about 100°to 200°C.; (b) contacting in said zone at least one portion of sa

A process for the manufacture of a composite material comprising: (a) passing a lightened thermoplastic shaped material whose external surface has a density higher than the core thereof through a zone having a temperature of about 100°to 200°C.; (b) contacting in said zone at least one portion of said denser external surface with fibers impregnated with a thermosetting resin diluted with an ethylenically unsaturated monomer which is a solvent for said dense external surface; and (c) cross-linking said thermosetting resin and polymerizing said unsaturated monomer at a temperature sufficient to effect said cross-linking and polymerization to form a composite material having a homogeneous intermediate layer between the thermoplastic layer and the thermosetting layer.