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.

A polyrotaxane represented by Formula (1):

##STR00001##

wherein R.sup.1 is a hydrogen atom or a methyl group, m is 1 to 2000, and n is 10 to 500,

##STR00002##

is a cyclodextrin in which at least one hydroxyl group is modified with a group represented by XNH.sub.2, and X is a divalent organic group.

Luminescent reporter compounds that are rotaxanes having the structure

##STR00001##

where BZC is a reporter molecule based on a squaraine type molecule, or similar reporter, and K is a macrocycle that encircles and interlocks with the reporter molecule. Applications of the reporter compounds are provided, as well as reactive intermediates used to synthesize the reporter compounds, and methods of synthesizing the reporter compounds.

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.

An object of the present invention is to provide a golf ball having an excellent spin performance on approach shots under a wet condition. The present invention provides a golf ball comprising a spherical core and a cover covering the spherical core, wherein the cover is formed from a cover composition containing (A) a polyurethane and (B) a polyrotaxane as a resin component, and wherein (B) 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.

The present invention relates to a method of preparing a polyrotaxane, said method comprising: performing a radical copolymerization of at least (a) a first polymerizable monomer having a stopper group, and of at least (b) a second polymerizable monomer, wherein said second monomer is complexed by a ring-shaped molecule; wherein during said copolymerization a copolymer threading said ring-shaped molecule is formed, wherein during said copolymerization said first monomer having a stopper group is incorporated into the chain of said copolymer at least partially between the ends thereof, and wherein said stopper groups prevent said ring-shaped molecule from disassembling from the copolymer; and wherein the amount of said first monomer having a stopper group is of from 0.1 mol % to 20 mol % based on 100 mol % of the total amount of polymerizable monomers.

The present invention also relates to polyrotaxanes which can be prepared by using such a method.

The present invention further relates to cross-linked polyrotaxanes, products which contain polyrotaxanes or cross-linked polyrotaxanes or which can be prepared from polyrotaxanes or cross-linked polyrotaxanes, and the use of polyrotaxanes or cross-linked polyrotaxanes.

An adhesive composition containing: an epoxy resin (A) having a fused ring structure; an epoxy resin curing agent (B); a polyrotaxane compound (C); and a polymer component (D), wherein the polyrotaxane compound (C) is contained in a content of 5 to 15 parts by mass based on total 100 parts by mass of contents of the epoxy resin (A) and the polymer component (D); a film adhesive using the adhesive composition; and a semiconductor package and a producing method thereof.

A photochromic composition comprising (A) a polyrotaxane having a composite molecular structure composed of an axial molecule and a plurality of cyclic molecules clathrating the axial molecule and (B) a photochromic compound.

A polyrotaxane containing an affinity binding group has been designed and prepared. The polyrotaxane of the invention can be used for characterization and determination of the three-dimensional structures of biological molecules, such as proteins.

Disclosed is a resin composition including at least a polyamide (A) and a polyrotaxane (B) whose cyclic molecule is modified with a graft chain, which are mixed together, wherein 80 parts by weight or more and 99.9 parts by weight or less of the polyamide (A) and 0.1 part by weight or more and 20 parts by weight or less of the polyrotaxane (B) are mixed together relative to 100 parts by weight of the total amount of the polyamide (A) and the polyrotaxane (B). To provide a resin composition capable of affording a molded article having excellent balance between rigidity and toughness.