An object of the present invention is to provide a golf ball showing excellent shot feeling and stain resistance. The present invention provides a golf ball comprising a golf ball body and a paint film formed on a surface of the golf ball body, wherein a base resin constituting the paint film includes a polyurethane obtained by a reaction between a polyol composition and a polyisocyanate composition, a molar ratio (NCO/OH) of an isocyanate group (NCO group) in the polyisocyanate composition to a hydroxyl group (OH group) in the polyol composition is 0.6 or more, and the paint film has an elastic modulus of 300 MPa or less.

A polyisocyanate resin can include from 25 wt % to 50 wt % of a first cycloaliphatic polyisocyanate and from 50 wt % to 75 wt % of a flexibilizing component based on a total weight of the polyisocyanate resin. The first cycloaliphatic polyisocyanate can have an NCO % of from 12 wt % to 20 wt % based on ISO 11909:2007. The flexibilizing component can include a linear aliphatic polyisocyanate having a number average isocyanate functionality of from 2 to 3 based on gel permeation chromatography and an isocyanate-terminated reaction product of a second cycloaliphatic polyisocyanate and an isocyanate-reactive material, the reaction product having a Tg of less than −30° C. based on a Differential Scanning Calorimetry (2.sup.nd Heating) temperature scan from −100° C. to 150° C. using 20° C./min heating and cooling ramps. The isocyanate-terminated reaction product and the linear aliphatic polyisocyanate can be present at a weight ratio of from 0.5 to 2.5.

A polyisocyanate resin can include from 25 wt % to 50 wt % of a first cycloaliphatic polyisocyanate and from 50 wt % to 75 wt % of a flexibilizing component based on a total weight of the polyisocyanate resin. The first cycloaliphatic polyisocyanate can have an NCO % of from 12 wt % to 20 wt % based on ISO 11909:2007. The flexibilizing component can include a linear aliphatic polyisocyanate having a number average isocyanate functionality of from 2 to 3 based on gel permeation chromatography and an isocyanate-terminated reaction product of a second cycloaliphatic polyisocyanate and an isocyanate-reactive material, the reaction product having a Tg of less than −30° C. based on a Differential Scanning Calorimetry (2.sup.nd Heating) temperature scan from −100° C. to 150° C. using 20° C./min heating and cooling ramps. The isocyanate-terminated reaction product and the linear aliphatic polyisocyanate can be present at a weight ratio of from 0.5 to 2.5.

A polyisocyanate resin can include from 25 wt % to 50 wt % of a first cycloaliphatic polyisocyanate and from 50 wt % to 75 wt % of a flexibilizing component based on a total weight of the polyisocyanate resin. The flexibilizing component can include a linear aliphatic polyisocyanate having a number average isocyanate functionality of from 2 to 3 based on gel permeation chromatography and an isocyanate-terminated reaction product of a second cycloaliphatic polyisocyanate and an isocyanate-reactive material, the reaction product having a Tg of less than −30° C. based on a Differential Scanning calorimetry (2.sup.nd Heating) temperature scan from −100° C. to 150° C. using 20° C./min heating and cooling ramps. The isocyanate-terminated reaction product and the linear aliphatic polyisocyanate can be present at a weight ratio of from 0.5 to 2.5.

A structural polyurethane adhesive contains a polyisocyanate component and a polyol component. The polyisocyanate component contains a first isocyanate component containing a first isocyanate group-terminated urethane prepolymer that is a reaction product of a first material polyisocyanate consisting of an aromatic polyisocyanate and a first material polyol containing a macropolyol, a second isocyanate component containing a second isocyanate group-terminated urethane prepolymer that is a reaction product of a second material polyisocyanate consisting of an araliphatic polyisocyanate and/or an aliphatic polyisocyanate and a second material polyol containing a polyether polyol having a number average molecular weight of 160 or more and 4900 or less, and a third isocyanate component containing a carbodiimide-modified product of an aromatic polyisocyanate. The ratio of the second isocyanate component with respect to the total amount of the first isocyanate component, the second isocyanate component, and the third isocyanate component is 2% by mass or more and 35% by mass or less.

A polyisocyanate resin can include from 25 wt % to 50 wt % of a first cycloaliphatic polyisocyanate and from 50 wt % to 75 wt % of a flexibilizing component based on a total weight of the polyisocyanate resin. The flexibilizing component can include a linear aliphatic polyisocyanate having a number average isocyanate functionality of from 2 to 3 based on gel permeation chromatography and an isocyanate-terminated reaction product of a second cycloaliphatic polyisocyanate and an isocyanate-reactive material, the reaction product having a Tg of less than ?30? C. based on a Differential Scanning calorimetry (2.sup.nd Heating) temperature scan from ?100? ? C. to 150? C. using 20? C./min heating and cooling ramps. The isocyanate-terminated reaction product and the linear aliphatic polyisocyanate can be present at a weight ratio of from 0.5 to 2.5.

The disclosure relates to at least one partially reacted product of an isocyanate and an amine (e.g., a reaction product comprising at least one adducted compound). The reaction product comprises polyurea oligomers. The reaction product can be combined with at least one amine in order to formulate a curing agent for epoxy resins wherein the cured epoxy resin has enhanced fracture toughness. The at least partially reacted product does not increase the viscosity of the curing agent and is at least partially soluble in the amine component of the curing agent.

Non-silicone urea-based adhesives are disclosed which are prepared by the polymerization of reactive oligomers with the general formula XBX, where X is an ethylenically unsaturated group and B is a unit free of silicone and containing urea groups. The reactive oligomers can be prepared from polyamines through chain extension reactions using diaryl carbonates followed by capping reactions. Adhesive articles, including optical adhesive articles may be prepared using the disclosed non-silicone urea-based adhesives.

The disclosure relates to a polyol composition, a corresponding polyurethane reaction system and a polyurethane foam prepared therefrom. The polyol composition includes: B1) an EO- and/or PO-based polyether polyol having a functionality of 2-6 and a weight-average molecular weight of 3000-12000 g/mol; B2) a PO- and/or EO-terminated polyarea polyol having a functionality of 2-4, and a weight-average molecular weight of 3000-8000 g/mol; optionally B3) a polyester polyol having a functionality of 2-4, and a weight-average molecular weight of 1000-1800 g/mol; and B4) at least one -dicarbonyl compound.