Abstract: The present invention provides a polyrotaxane having high durability and in particular, high hydrolysis resistance, and a method for producing said polyrotaxane. The present invention provides a polyrotaxane obtained by disposing blocking groups on both ends of a pseudopolyrotaxane so that an annular molecule cannot be displaced, said pseudopolyrotaxane being obtained by forming a clathrate by piercing the opening of the cyclic molecule with a linear molecule, said polyrotaxane being characterized in that the cyclic molecule has a substituent represented by formula I (in formula I, R1 represents a group such as —CH3 and —CH2—CH3, R2 represents H or a group such as —CH3, and n is the apparent degree of polymerization of a polyalkylene oxide chain or a derivative thereof added to the cyclic molecule, the value of n being 1.1 to 10.0).

Abstract: The present invention provides a spherical powder having properties, such as an excellent strength, toughness, and deformation recovery, and provides a method for producing same. The present invention provides: a spherical powder containing a crosslinked body formed having (A) a polyrotaxane in which both ends of a pseudopolyrotaxane, which are formed by inclusion of the opening of a cyclic molecule by threading therethrough with a linear molecule, are provided with a capping group so that dethreading of the linear molecule is prevented, in particular, a spherical powder having an average particle diameter of 0.5 to 1,000 ?m, preferably 1 to 500 ?m, more preferably 1 to 300 ?m, and still more preferably 1 to 150 ?m; and a method for producing this spherical powder.

Abstract: The present invention provides a material of high toughness that could not have been provided by an epoxy resin alone. The present invention provides a crosslinking composition having (A) one or more polyrotaxanes in which end-capping groups which prevent dissociation of the linear group are situated at both ends of a pseudo-polyrotaxane formed by inclusion of a linear molecule in the opening of a cyclic molecule by being threaded therethrough, the polyrotaxane having on the cyclic molecule a functional group that is capable of reacting with the oxirane group and/or the oxetane group, the functional group being one or more selected from the group consisting of carboxylic acid groups, carboxylate groups, primary amine groups, secondary amino groups, tertiary amino groups, phenol groups, the oxirane group, and the oxetane group, and (B) a compound having two or more oxirane groups and/or oxetane groups; and a crosslinked product employing the composition.

Abstract: A composition includes a polyrotaxane (A) which includes cyclodextrin as a ring molecule and polyethylene glycol as a linear molecule, and in which a blocking group is arranged at both ends of the linear molecule; a block copolymer (B) including polysiloxane; and a polymer (C) including no polysiloxane.

Abstract: The present invention provides a photocured product having both excellent toughness and high strength, and also provides a photocurable composition for forming said photocured product. The present invention provides a photocurable composition comprising: A. a (meth)acrylic acid ester monomer, wherein the glass transition temperature of a polymer formed from only said monomer is 20° C. or higher; B. a polyrotaxane obtained by respectively placing blocking groups at both ends of a pseudo-polyrotaxane, which is obtained by threading a linear molecule through the hole of a cyclic molecule, so as not to release the cyclic molecule, wherein the cyclic molecule has a (meth)acrylic group; and C. a photopolymerization initiator. The present invention also provides a photocured product formed from said composition.

Abstract: The present invention provides a thermoplastic elastomer (TPE), in particular a polyurethane-based thermoplastic elastomer (TPU), that has exceptional elongation, strength, and wear resistance, and in particular has exceptional wear resistance. The present invention provides: a thermoplastic elastomer composition containing A) a thermoplastic urethane elastomer composition having A1) at least one polyol selected from the group consisting of polyether polyols, polyesterpolyols, and polycarbonate polyols, A2) a diisocyanate, and A3) a chain extender, and B) polyrotaxane formed by arranging blocking groups, at both ends of pseudo-polyrotaxane formed by inclusion of the openings of cyclic molecules in a shape skewered by linear molecules, so that the cyclic molecules are not eliminated; and a thermoplastic elastomer derived from this composition.

Abstract: The present invention provides: a polyurethane foam having excellent viscoelastic characteristics and/or excellent feeling; a composition for the polyurethane foam; and a method for producing the polyurethane foam. The present invention provides a composition for a polyurethane foam, the composition containing: (A) a polyol having three or more OH groups; (B) a compound having two or more isocyanate groups; and (C) a polyrotaxane obtained as a result of arranging, on both ends of a pseudo-polyrotaxane formed through skewering-like inclusion of a linear molecule through the openings of cyclic molecules, stopper groups so that the cyclic molecules do not dissociate from the pseudo-polyrotaxane.

Abstract: A polyrotaxane is blended into a polyol composition, which can reduce the tensile stress of a flexible polyurethane foam. A vertical compressive stress due to the weight of a sitting user and a tensile stress due to the input of lateral vibrations act on a urethane pad. However, by reducing the tensile stress of the flexible polyurethane foam, the direction (inclination) of a resultant force obtained by combining the compressive stress and the tensile stress can be brought close to the vertical direction. Thus, the angle of inclination of the user's hip (ischium) on the urethane pad to the vertical direction due to the input of lateral vibrations can be reduced, so that the sense of wobble of the urethane pad can be reduced.

Abstract: A polyrotaxane is blended into a polyol composition, which can reduce the tensile stress of a flexible polyurethane foam. A vertical compressive stress due to the weight of a sitting user and a tensile stress due to the input of lateral vibrations act on a urethane pad. However, by reducing the tensile stress of the flexible polyurethane foam, the direction (inclination) of a resultant force obtained by combining the compressive stress and the tensile stress can be brought close to the vertical direction. Thus, the angle of inclination of the user's hip (ischium) on the urethane pad to the vertical direction due to the input of lateral vibrations can be reduced, so that the sense of wobble of the urethane pad can be reduced.

Abstract: The present invention provides a thermoplastic elastomer (TPE), in particular a polyurethane-based thermoplastic elastomer (TPU), that has exceptional elongation, strength, and wear resistance, and in particular has exceptional wear resistance. The present invention provides: a thermoplastic elastomer composition containing A) a thermoplastic urethane elastomer composition having A1) at least one polyol selected from the group consisting of polyether polyols, polyesterpolyols, and polycarbonate polyols, A2) a diisocyanate, and A3) a chain extender, and B) polyrotaxane formed by arranging blocking groups, at both ends of pseudo-polyrotaxane formed by inclusion of the openings of cyclic molecules in a shape skewered by linear molecules, so that the cyclic molecules are not eliminated; and a thermoplastic elastomer derived from this composition.

Abstract: The present invention provides a photocured product having both excellent toughness and high strength, and also provides a photocurable composition for forming said photocured product. The present invention provides a photocurable composition comprising: A. a (meth) acrylic acid ester monomer, wherein the glass transition temperature of a polymer formed from only said monomer is 20° C. or higher; B. a polyrotaxane obtained by respectively placing blocking groups at both ends of a pseudo-polyrotaxane, which is obtained by threading a linear molecule through the hole of a cyclic molecule, so as not to release the cyclic molecule, wherein the cyclic molecule has a (meth) acrylic group; and C. a photopolymerization initiator. The present invention also provides a photocured product formed from said composition.

Abstract: The present invention aims to provide a method of producing a hydrophilic modified polyrotaxane, which enables production of a hydrophilic modified polyrotaxane excellent in storage stability in an industrially advantageous way. The present invention provides a method of producing a hydrophilic modified polyrotaxane, comprising: a hydrophilic modification step of preparing a solution of a hydrophilic modified polyrotaxane by modifying all or part of hydroxy groups on a cyclodextrin of a polyrotaxane with hydrophilic modifying groups, the polyrotaxane containing the cyclodextrin, a polyethylene glycol included in the cavities of the cyclodextrin molecules in a skewered manner, and a capping group that is placed at each end of the polyethylene glycol and prevents dissociation of the cyclodextrin molecules from the polyethylene glycol; and a drying step in which the prepared solution of the hydrophilic modified polyrotaxane is formed into a thin film state and dried.

Abstract: The present invention provides a material of high toughness that could not have been provided by an epoxy resin alone. The present invention provides a crosslinking composition having (A) one or more polyrotaxanes in which end-capping groups which prevent dissociation of the linear group are situated at both ends of a pseudo-polyrotaxane formed by inclusion of a linear molecule in the opening of a cyclic molecule by being threaded therethrough, the polyrotaxane having on the cyclic molecule a functional group that is capable of reacting with the oxirane group and/or the oxetane group, the functional group being one or more selected from the group consisting of carboxylic acid groups, carboxylate groups, primary amine groups, secondary amino groups, tertiary amino groups, phenol groups, the oxirane group, and the oxetane group, and (B) a compound having two or more oxirane groups and/or oxetane groups; and a crosslinked product employing the composition.

Abstract: The present invention aims to provide a polyrotaxane composition having excellent storage stability. The present invention relates to a polyrotaxane composition comprising: a polyrotaxane containing a cyclodextrin, a polyethylene glycol which is included in the cavities of the cyclodextrin molecules in a skewered manner, and a capping group that is placed at each end of the polyethylene glycol and prevents dissociation of the cyclodextrin molecules from the polyethylene glycol; and a polyphenol antioxidant.

Abstract: The present invention aims to provide a hydrophilic modified polyrotaxane composition having excellent storage stability. The present invention relates to a hydrophilic modified polyrotaxane composition comprising: a hydrophilic modified polyrotaxane produced by modifying, with hydrophilic modifying groups, all or part of hydroxy groups on a cyclodextrin of a polyrotaxane containing the cyclodextrin, a polyethylene glycol which is included in the cavities of the cyclodextrin molecules in a skewered manner, and a capping group that is placed at each end of the polyethylene glycol and prevents dissociation of the cyclodextrin molecules from the polyethylene glycol; and a polyphenol antioxidant.

Abstract: The invention provides an industrially advantageous method for the production of hydroxyalkylated polyrotaxanes. The method of producing hydroxyalkylated polyrotaxane includes reacting a polyrotaxane with a cyclic ether represented by Formula (1) in the presence of water and an organic base, wherein the polyrotaxane includes hydroxyl group-containing cyclic molecules, a linear molecule threaded through the cyclic molecules to form a clathrate, and blocking groups at both ends of the linear molecule to prevent the separation of the cyclic molecules from the linear molecule.

Abstract: The invention provides a method of producing a polyrotaxane having cyclic molecules, a linear molecule threaded through the cyclic molecules to form a clathrate, and blocking groups at both ends of the linear molecule to prevent the separation of the cyclic molecules from the linear molecule, the method including forming the blocking groups by reacting the linear molecule piercing the cyclic molecules, the linear molecule having carboxyl groups at both ends thereof, with a blocking agent having an amino group in the absence of a solvent or in at least one organic solvent selected from the group consisting of aprotic amide solvents and aromatic hydrocarbons, and further in the presence of 2.0 mol to 100 mol of a triazine-based amidating agent per 1 mol of the carboxyl groups in the linear molecule.

Abstract: The present invention aims to provide a method of producing a powdered hydrophilic modified polyrotaxane, which enables production of a powdered hydrophilic modified polyrotaxane excellent in storage stability in an industrially advantageous way.

Abstract: The present invention aims to provide a method of producing a hydrophilic modified polyrotaxane, which enables production of a hydrophilic modified polyrotaxane excellent in storage stability in an industrially advantageous way. The present invention provides a method of producing a hydrophilic modified polyrotaxane, comprising: a hydrophilic modification step of preparing a solution of a hydrophilic modified polyrotaxane by modifying all or part of hydroxy groups on a cyclodextrin of a polyrotaxane with hydrophilic modifying groups, the polyrotaxane containing the cyclodextrin, a polyethylene glycol included in the cavities of the cyclodextrin molecules in a skewered manner, and a capping group that is placed at each end of the polyethylene glycol and prevents dissociation of the cyclodextrin molecules from the polyethylene glycol; and a drying step in which the prepared solution of the hydrophilic modified polyrotaxane is formed into a thin film state and dried.

Abstract: The present invention aims to provide a hydrophilic modified polyrotaxane composition having excellent storage stability. The present invention relates to a hydrophilic modified polyrotaxane composition comprising: a hydrophilic modified polyrotaxane produced by modifying, with hydrophilic modifying groups, all or part of hydroxy groups on a cyclodextrin of a polyrotaxane containing the cyclodextrin, a polyethylene glycol which is included in the cavities of the cyclodextrin molecules in a skewered manner, and a capping group that is placed at each end of the polyethylene glycol and prevents dissociation of the cyclodextrin molecules from the polyethylene glycol; and a polyphenol antioxidant.