Patent ID: 8470034

Claim:
A cross-linked, hydrophobic, acrylic polymer material, deformable at room temperature, wherein the material is a three-dimensional macromolecular network obtained by radical polymerization starting from a mixture of acrylic and methacrylic monomers, characterized in that the mixture comprises: cross-linking compounds wherein said cross-linking compounds act, during the polymerization, to form the three-dimensional network; and additionally at least a transfer agent that, when the polymerization occurs, interrupts locally the three-dimensional network formation to create dangling chains, wherein said mixture comprises at least the following monomers: an arylalkoxy acrylate or an arylalkoxy methacrylate; an alkyl acrylate; a hydroxylated acrylate; a hydroxylated methacrylate; a diol diacrylate; and a diol dimethacrylate, and wherein said monomers are comprised in the following amounts: between 45 and 89% by weight of arylalkoxy acrylate or arylalkoxy methacrylate; between 5 and 20% by weight of alkyl acrylate; between 5 and 20% by weight of a mixture of hydroxylated acrylate and hydroxylated methacrylate; between 1 and 3% by weight of a mixture of diol diacrylate and diol dimethacrylate.