Patent ID: 9034986
Filing Date: 2015-05-19
Classification: C08G

Abstract:
1. A method for producing a material comprising a first polyrotaxane and a second polyrotaxane, wherein the first and second polyrotaxanes are crosslinked with each other, the material is free from solvent, and the material has a stress at 50% strain (δ50) of 2.0 MPa or less; the method comprising the steps of: a) preparing the first 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 of each 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 first cyclic molecule has a first active group, and the first linear molecule is polyethylene glycol; b) preparing the second polyrotaxane, wherein 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 of each 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 second cyclic molecule has a second active group, and the second linear molecule is polyethylene glycol; and c) mixing and reacting i) the first polyrotaxane; ii) the second polyrotaxane; and iii) a crosslinking compound, which has a first reactive group and a second reactive group, each of which is reactive with the first and second active groups, respectively, and which has a polymeric moiety comprising repeating units of 10 or more between the first and second reactive groups, to obtain the material.