Patent ID: 8785552
Filing Date: 2014-07-22
Classification: C08G

Abstract:
1. A material comprising a first polyrotaxane and a second polyrotaxane, wherein the first polyrotaxane comprises a first pseudopolyrotaxane, which has a first linear molecule and a first cyclic molecule(s) in which the first linear molecule is included in a cavity (cavities) of the first cyclic molecule(s) in a skewered manner, and first capping groups, each of which locates at each end of the first pseudopolyrotaxane in order to prevent the dissociation of the first cyclic molecule(s), the second polyrotaxane comprises a second pseudopolyrotaxane, which has a second linear molecule and a second cyclic molecule(s) in which the second linear molecule is included in a cavity (cavities) of the second cyclic molecule(s) in a skewered manner, and second capping groups, each of which locates at each end of the second pseudopolyrotaxane in order to prevent the dissociation of the second cyclic molecule(s), the first and second linear molecules are polyethylene glycol, the first and second polyrotaxanes are crosslinked with each other via the first and second cyclic molecules, each of the first and second cyclic molecules has a first active group and a second active group, respectively, the crosslinked body has a crosslinking moiety which is bound to the first cyclic molecule and the second cyclic molecule, the crosslinking moiety has a first reactive group and a second reactive group, each of which is reactive with the first active group and the second active group, respectively, and the crosslinking moiety has a polymeric moiety between the first and second reactive groups, the reactive group is selected from the group consisting of an isocyanate group, a thioisocyanate group, an oxirane group, an oxetane group, a carbodiimide group, a silanol group, an oxazoline group, and an aziridine group, the polymeric moiety comprises repeating units of 10 or more and/or has molecular weight of 1,000 or more, the material is free from solvent, and the material has a stress at 50% strain (δ50) of 2.0 MPa or less.