The present invention aims to provide an industrially advantageous method of producing a powdery pseudopolyrotaxane with a high inclusion ratio. The present invention relates to a method for producing a pseudopolyrotaxane, including: an inclusion step of mixing a polyethylene glycol and a cyclodextrin in an aqueous medium to form an aqueous dispersion of pseudopolyrotaxane that contains pseudopolyrotaxane particles in which the polyethylene glycol is included in the cavities of the cyclodextrin molecules in a skewered manner; and a drying step of drying the aqueous dispersion of pseudopolyrotaxane produced in the inclusion step to obtain the pseudopolyrotaxane. In the drying step, the aqueous dispersion of pseudopolyrotaxane is sprayed and dried in a heated gas-stream.

An object of the present invention is to provide a golf ball excellent in durability. The present invention provides a golf ball comprising a constituent member containing a crosslinked rubber component and a polyrotaxane component, wherein the polyrotaxane has a cyclodextrin, a linear molecule piercing through the cyclic structure of the cyclodextrin, and blocking groups located at both terminals of the linear molecule to prevent disassociation of the cyclodextrin, and at least a part of hydroxyl groups of the cyclodextrin is modified with a caprolactone chain via OC.sub.3H.sub.6O group.

A hardcoat film includes a base material film and a cured layer disposed on at least one surface of the base material film, in which the cured layer is obtained by curing an active energy ray-curable resin composition, a film thickness of the cured layer is greater than 10 m, and contains polyrotaxane, inorganic fine particles having an average primary particle diameter of less than 2 m, and particles having an average primary particle diameter of equal to or greater than 2 m, and a mass of the particles is equal to or greater than 0.10 g/cm.sup.3. In the hardcoat film, both high surface hardness and sufficient surface asperities can be achieved in the cured layer having a large film thickness containing the inorganic fine particles. Also provided are a front plate of an image display element, a resistive film-type touch panel, a capacitance-type touch panel, and an image display.

The present invention relates to a novel polyrotaxane compound having a specific chemical structure, a photocurable coating composition that may provide a coating material having excellent mechanical properties such as scratch resistance, chemical resistance, abrasion resistance, and the like, and excellent self-healing capability, and a coating film obtained from the photocurable coating composition.

Disclosed herein are a supercontractible thin film comprising crystalline inclusion complex domains formed from poly(pseudo)rotaxanes or polyrotaxanes, and oriented polyethylene oxide domains physically crosslinked to the crystalline inclusion complex domains, wherein the poly(pseudo)rotaxanes or polyrotaxanes are formed from -cyclodextrin and a polyethylene glycol having a number average molecular weight of from 500 to 10,000 Daltons, the polyethylene oxide has a number average molecular weight of from 200,000 to 10,000,000 Daltons, and the supercontractible thin film contracts by more than 50% of its original length upon wetting with water, a shape-adaptive supercontractile electrode and a shape-adaptive supercontractile electronic device. Also disclosed herein are methods of forming a supercontractible thin film, a freestanding film, and an electrode composite material.

The present invention aims to provide a polyester resin composition capable of producing a molded article having excellent stretchability. The present invention also aims to provide a molded article including the polyester resin composition.

The present invention relates to a polyester resin composition including: a polyester resin; and a polyrotaxane that has a cyclic molecule, a linear molecule threading through a cavity of the cyclic molecule in a skewered manner, and capping groups capping both ends of the linear molecule.

A golf ball 2 includes an inner core 4, an outer core 6, a mid layer 8, and a cover 10. A diameter D1, a volume V1, a hardness H1o at a central point, and a boundary inside hardness H1in of the inner core 4; a volume V2, a boundary outside hardness H2out, and a surface hardness H2s of the outer core 6; a thickness Tm and a hardness Hm of the mid layer 8; and a thickness Tc and a hardness Hc of the cover 10 meet the following mathematical formulas (1) to (4): 1.0<V2/V1<7.0 (1); 2<H2sH2out<2 (2); 600<(H1o+H1in)*(D1/2)/2<1000 (3); 620<Tc*Hc*Hm/Tm<900 (4). The cover 10 includes a polyrotaxane.

A golf ball 2 includes a core 4, a mid layer 6, and a cover 8. A difference DH in hardness between a surface and a central point of the core 4, a thickness Tm and a hardness Hm of the mid layer 6, a thickness Tc and a hardness Hc of the cover 8, and an amount of compressive deformation Sb of the golf ball 2 meet the following mathematical formulas (DH*Hm)/(Hc*Tc)>80 and ((Sb*Tc)/(Hc*Hm*Tm))*1000>0.75. A hardness Hc of the cover 8 is equal to or less than 40. A material of the cover 8 is a resin composition. The resin composition includes a polyurethane (A) and a polyrotaxane (B).

It is the object of the present invention a composition containing an N-acyl-ethanolamine in a solubilized form, particularly a solution for ophthalmic, intra-articular or intravesical use. Particularly, the present invention relates to a water-soluble composition comprising one or more N-acylethanolamines (NAE) in the form of an inclusion complex in methyl-beta-cyclodextrin (MCD).

An object of the present invention is to provide a golf ball showing increased controllability on approach shots for less than 40 yards and showing excellent shot feeling. In the inventive golf ball, the paint film is formed from a curing type paint composition including: a base material containing a polyrotaxane, and a curing agent containing a polyisocyanate, and wherein the polyrotaxane has a cyclodextrin, a linear molecule included in a cyclic structure of the cyclodextrin in a manner of piercing through the cyclic structure of the cyclodextrin, and a blocking group located at both ends of the linear molecule to prevent disassociation of the cyclodextrin, and at least a part of hydroxyl groups of the cyclodextrin is modified with a caprolactone chain via OC.sub.3H.sub.6O group.