Patent ID: 11938686
Assignee: ARKEMA FRANCE
Field: Other special machines (Mechanical engineering)
Classification: CPC B  C  Y | IPC B  C

Claim 0:
1. A multilayer composition for manufacturing mechanical or structured parts or articles comprising
a) a surface layer comprising a thermoplastic polymer A, and
b) a substrate layer comprising a polymeric composite material, wherein said polymeric composite material comprises a polymeric thermoplastic (meth)acrylic matrix selected from the group consisting of a homopolymer or copolymer of methyl(meth)acrylate comprising at least 70% by weight of methyl(meth)acrylate and mixtures thereof, and a fibrous material as reinforcement, wherein the fibrous material comprises discontinuance fibers and wherein said polymeric composite material is formed by the impregnation of said fibrous material with a (meth)acrylic syrup comprising a methyl methacrylate polymer having a weight average molecular weight of greater than 100,000 g/mol, dissolved in a (meth)acrylic monomer wherein said (meth)acrylic monomer comprises methyl methacrylate monomer, followed by polymerization of said (meth)acrylic syrup, wherein said (meth)acrylic syrup has a dynamic viscosity at 25° C. between 10 mPa*s and 10000 mPa*s, and wherein said (meth)acrylic syrup comprises the (meth)acrylic monomer or a mixture of the (meth)acrylic monomers, the methyl methacrylate polymer and at least one initiator or initiating system for starting the polymerization of the (meth)acrylic monomer, wherein said (meth)acrylic syrup forms the polymeric thermoplastic (meth)acrylic matrix,, wherein said impregnation of said fibrous material is made in a closed mold, and wherein said surface layer has a thickness of less than 10 mm.