An object of the present invention is to provide a golf ball having oily stain washability or weed juice stain resistance that is adjustable depending on a temperature. The present invention provides a golf ball comprising a golf ball body and a paint film composed of at least one layer and covering the golf ball body, wherein a molecular chain of a base resin constituting an outermost layer located at an outermost side of the paint film has a graft chain, and 80 mole % or more of repeating units constituting the graft chain includes any one of repeating units represented by formulae (1) to (4):

##STR00001##

[In the formulae (1) to (4), R.sup.1 to R.sup.5 each independently represent hydrogen, halogen or an organic group.]

An object of the present invention is to provide a golf ball having oily stain washability or weed juice stain resistance that is adjustable depending on a temperature. The present invention provides a golf ball comprising a golf ball body and a paint film composed of at least one layer and covering the golf ball body, wherein a molecular chain of a base resin constituting an outermost layer located at an outermost side of the paint film has a graft chain, and 80 mole % or more of repeating units constituting the graft chain includes any one of repeating units represented by formulae (1) to (4):

##STR00001##

[In the formulae (1) to (4), R.sup.1 to R.sup.5 each independently represent hydrogen, halogen or an organic group.]

The present invention provides an optically clear adhesive sheet that has excellent flexibility and prevents delay bubbles in high temperature and high humidity environments. The optically clear adhesive sheet of the present invention sequentially includes a first surface-adhesive layer, an intermediate adhesive layer, and a second surface-adhesive layer. The first surface-adhesive layer and the second surface-adhesive layer each have a higher storage elastic modulus at 85° C. than the intermediate adhesive layer. The first surface-adhesive layer and the second surface-adhesive layer each have a storage elastic modulus at 85° C. of 3.0×10.sup.4 Pa or higher and 30.0×10.sup.4 Pa or lower. The intermediate adhesive layer has a storage elastic modulus at 85° C. of 1.0×10.sup.4 Pa or higher and 15.0×10.sup.4 Pa or lower. The intermediate adhesive layer contains polyurethane.

An amorphous thermoset thiourethane polymer, comprising a sequential chain of a first type of monomer covalently bonded to a second type of monomer via thiourethane linkages, wherein the first type of monomer includes two or more thiol functional groups and the second type of monomer includes two or more isocyanate functional groups. Methods of synthesizing the polymer, bio-electronic devices comprising the polymer and methods of manufacturing such devices are disclosed.

A golf ball wherein a slide amount Ds is 1.05 mm or less and a post-slide contact time Tc is 600 μs or more in the case where a golf ball 140 is dropped freely from a height position of 3 m above and away from a collision surface 130a inclined 58 degrees with respect to a horizontal direction to collide with the collision surface, the slide amount Ds being a vertical displacement of the golf ball from when the golf ball starts sliding on the collision surface to when the golf ball stops sliding on the collision surface, and the post-slide contact time Tc being a period from when the golf ball stops sliding on the collision surface to when the golf ball leaves the collision surface.

An object of the present invention is to provide a golf ball having improved ball speed or aerodynamic performance on a rainy day or the like 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 a paint film surface of the golf ball has a water contact angle A1 of 70° or more and a water sliding angle B1 of less than 50°. The present invention also provides a golf ball comprising a golf ball body and a paint film covering the golf ball body, wherein when a sheet consisting of a slab formed from a composition constituting a golf ball body surface and a coating film formed by applying a paint constituting the paint film on the slab is prepared, a coating film surface of the sheet has a water contact angle A2 of 90° or more and a water sliding angle B2 of less than 52°.

Provided are a composition for forming a polyurethane resin used for a membrane sealing material, the composition having low viscosity and contributing to the formation of a membrane sealing material having reduced elution of low-molecular weight reaction products; and a membrane sealing material and a membrane module using this composition. Disclosed is a composition for forming a polyurethane resin used for a membrane sealing material, the composition including a base agent (A) and a curing agent (B), wherein the base agent (A) comprises an isocyanate group-terminated prepolymer (A1), the isocyanate group-terminated prepolymer (A1) is a reaction product between an isocyanate group-containing compound (a1) and an active hydrogen-containing compound (a2), the base agent (A) comprises diphenylmethane diisocyanate, the monomer content of the diphenylmethane diisocyanate is 35% by mass or less, and the curing agent (B) comprises a compound (b1) represented by Formula (1). In Formula (1), R represents an alkyl group having 2 or more carbon atoms. ##STR00001##

The present disclosure provides a two-component solventless adhesive composition comprising a polyol component and an isocyanate component. The polyol component comprises a phosphate functional compound, and at least one polyol selected from polyester, polyether, and the combination thereof; and the isocyanate component comprises isocyanate prepolymer that is the reaction product of at least one isocyanate monomer and at least one polyol selected from polyester, polyether, and the combination thereof.

The present invention relates to urethane, thiourethane and urea adducts of tertiary amines and the use thereof as catalysts for the crosslinking of aliphatically, cycloaliphatically, araliphatically or aromatically bonded isocyanate groups with one another. The catalysts according to the invention have the particular advantage that they are thermolatent.

Provided according to some embodiments is a polymerizable liquid useful for the production of a three-dimensional object comprised of polyurethane, polyurea, or a copolymer thereof by additive manufacturing, the polymerizable liquid comprising a mixture of: (a) a first blocked or reactive blocked prepolymer comprising a compound of the formula X(A).sub.n, where X is a hydrocarbyl group, n is at least 3, and each A is an independently selected substituent of Formula I: (I) where R is a hydrocarbyl group, R′ is O or NH, and Z is a blocking group; (b) a polyol and/or polyamine chain extender; (c) optionally a reactive diluent; and (d) a photoinitiator. A method of use of the polymerizable liquid to make a three-dimensional object by additive manufacturing and prepolymer compounds useful for the same are also provided.

##STR00001##