The present invention is to provide a bound stopper, which has high mechanical strength, is excellent in durability against fatigue breaking, settling or the like when a heavy load is repeatedly received, and is easy to be produced, in which the bound stopper comprises a polyurethane foam obtained from a polyurethane foam composition containing an isocyanate component and a blowing agent, and the isocyanate component contains a urethane prepolymer having an isocyanate group, the urethane prepolymer being obtained from a polyol component, a polyrotaxane containing a cyclic molecule having an active hydrogen group as a constituent, and an isocyanate.

The present invention provides alkyl substituted polysaccharide compositions and methods of repairing substrates involving use of the alkyl substituted polysaccharide compositions.

A golf ball includes a main body and a paint layer positioned outside the main body. The paint layer includes an inner layer and an outer layer positioned outside the inner layer. When an indentation depth (nm) is measured on a cross-section along a plane passing through a central point of the golf ball when a force of 30 mgf is applied to the cross-section in a direction perpendicular to the cross-section, an indentation depth Di on a cross-section of the inner layer is smaller than an indentation depth Do on a cross-section of the outer layer. A thickness To of the outer layer is larger than a thickness Ti of the inner layer.

An object of the present invention is to provide a golf ball having improved spin performance on wedge shots under a wet condition such as rain by controlling the formulation of the paint film. The present invention provides a golf ball comprising a golf ball body and a paint film covering the golf ball body, wherein the paint film contains a base resin and a porous filler, and the porous filler contains SiO.sub.2 as a constituent in an amount of 50 mass % or more.

An object of the present invention is to provide a golf ball having excellent spin performance on approach shots under a wet condition and excellent spin performance on approach shots under a condition that there is grass between the golf ball and the club face. The present invention provides a golf ball comprising a golf ball body and a paint film composed of at least one layer and formed on a surface of the golf ball body, wherein an outermost layer of the paint film located at the outermost layer of the golf ball contains a base resin and a porous filler, the base resin contains a polyurethane obtained by a reaction between a polyisocyanate composition and a polyol composition, and the porous filler contains SiO.sub.2 in an amount of 50 mass % or more as a constituent component.

Disclosed is a composition for improving the corrosion resistance of metals coated with 2K coatings. The composition comprises the reaction product of an aromatic sulfonyl isocyanate and an alcohol or polyol monomer. Also disclosed is a method of improving the corrosion resistance of metals coated with 2K coatings by the addition of a sulfonyl urethane-alcohol composition reaction product of an aromatic sulfonyl isocyanate and a mono-alcohol or poly-alcohol.

Polyol blends are disclosed that include a saccharide-initiated polyether polyol, an aromatic polyester polyol, and a polyalkylene polyamine-initiated polyether polyol. Also disclosed are foam-forming compositions containing such polyol blends, rigid foams made using such polyurethane foam-forming compositions, and methods for producing such foams, including use of such foams as panel insulation.

A renewable chemical composition is disclosed for use in a variety of industrial applications. The renewable chemical composition may be reacted with an isocyanate to produce a polyurethane material. The renewable chemical composition has aromatic groups. The suitability of this material for use in a variety of applications can be adjusted by modifying the acid number, the Hydroxyl number, the viscosity, the glass transition temperature, the % solids, the softening point, and other properties. The chemical reactivity and properties can be modified based on processing conditions and temperature as well as the source of renewable raw material. The lignin used in these formulations may be from pulp and paper processing such as semi-mechanical processing, soda processing, kraft processing, or biomass processing, or a by-product of ethanol production. The novel biobased polyurethane formulations range in firmness from flexible to semi-rigid to rigid and are useful in large volume polyurethane applications.

An object of the present invention is to provide a golf ball having improved spin performance on wedge shots under a wet condition such as rain by controlling the formulation of the paint film. The present invention provides a golf ball comprising a golf ball body and a paint film covering the golf ball body, wherein the paint film contains a base resin and a porous filler, and the porous filler contains SiO.sub.2 as a constituent in an amount of 50 mass % or more.

A composite material comprising an elastomer and nanocellulose. The nanocellulose may comprise a nanocellulose material derived from plants having C4 leaf anatomy, or a nanocellulose material derived from a plant material having a lesser amount of lignin than hemicellulose, or a nanocellulose having a hemicellulose content of from 25% to 55% by weight of the nanocellulose material, or a nanocellulose comprising nanofibrils having a diameter of up to 5 nm, or a nanocellulose comprising nanocellulose material of plant origin comprising nanocellulose particles or fibres having an aspect ratio of at least 250, or the composite material having a stiffness of not greater than 2.5 times the stiffness of the elastomer without the nanocellulose material being present, or the nanocellulose particles or fibres being derived from a plant material having a hemicellulose content of 30% or higher (w/w). The nanocellulose may be derived from arid Spinifex.