A method for producing a nitrile rubber, includes recovering a nitrile rubber from a latex of nitrile rubber by continuously feeding the latex of nitrile rubber and a coagulant into an extruder including a screw disposed inside a barrel to be rotatably driven, wherein the latex of nitrile rubber fed into the extruder contains 0.1 to 3 parts by weight of a hindered phenol-based antiaging agent having a molecular weight of 300 to 3000 relative to 100 parts by weight of the nitrile rubber.

The present disclosure relates to an adhesive composition and a method for preparing the same, and more particularly, to an adhesive composition having high biodegradability and excellent mechanical properties while being biocompatible, and a method for preparing the same.

The present disclosure relates to an adhesive composition and a method for preparing the same, and more particularly, to an adhesive composition having high biodegradability and excellent mechanical properties while being biocompatible, and a method for preparing the same.

A millimeter-wave radar housing material capable of being laser welded, and a preparation method therefor, which belong to the technical field of millimeter-wave radar housing manufacturing. The millimeter-wave radar housing material specifically comprises the following components in parts by weight: 50-90 parts of polypropylene, 10-50 parts of glass fiber, 0.2-0.8 part of a nucleating agent, 0.5-1 part of a compatibilizer, 0.1-0.5 part of a black colorant, 0.1-0.5 part of an antioxidant, and 0.1-0.8 part of a light stabilizer. The radar housing material disclosed by the present invention has the advantages of low dielectricity, being lightweight, high strength and high heat resistance, can transmit a near-infrared light beam, and has laser weldability.

A millimeter-wave radar housing material capable of being laser welded, and a preparation method therefor, which belong to the technical field of millimeter-wave radar housing manufacturing. The millimeter-wave radar housing material specifically comprises the following components in parts by weight: 50-90 parts of polypropylene, 10-50 parts of glass fiber, 0.2-0.8 part of a nucleating agent, 0.5-1 part of a compatibilizer, 0.1-0.5 part of a black colorant, 0.1-0.5 part of an antioxidant, and 0.1-0.8 part of a light stabilizer. The radar housing material disclosed by the present invention has the advantages of low dielectricity, being lightweight, high strength and high heat resistance, can transmit a near-infrared light beam, and has laser weldability.

A polyester polymer composition is disclosed containing reinforcing fibers and having improved adhesion to elastomeric materials while also being formulated for medical applications and/or food service applications. The polyester polymer composition can contain a blend of different polyester polymers and can be free of hindered phenolic antioxidants. The polyester polymer composition can be used in overmolding applications in which the composition is initially molded into a polymer component and then overmolded with an elastomeric material. The elastomeric material can contain a copolyester elastomer and can serve as a sealing member.

A polyester polymer composition is disclosed containing reinforcing fibers and having improved adhesion to elastomeric materials while also being formulated for medical applications and/or food service applications. The polyester polymer composition can contain a blend of different polyester polymers and can be free of hindered phenolic antioxidants. The polyester polymer composition can be used in overmolding applications in which the composition is initially molded into a polymer component and then overmolded with an elastomeric material. The elastomeric material can contain a copolyester elastomer and can serve as a sealing member.

A method for manufacturing a device including a substrate and a second film disposed above the substrate includes: forming a first film above the substrate using a composition containing a polymerizable monomer and an oxidation inhibitor; and forming the second film by curing the first film in a state where at least one part of a mold having a convexo-concave pattern is in contact with the first film, or after at least one part of the mold is brought into contact with the first film. The oxidation inhibitor is at least one of a hindered amine compound and a hindered phenol compound having a molecular weight of 700 or more. The composition satisfies a relationship of (t.sub.0(T)−t.sub.x(T))/t.sub.0(T)×100≤13.0. (t.sub.0(T) is a height of a convex part of cured film obtained by the specific method, and t.sub.x(T) is the corresponding height after heating at 260° C.)

An object of the present invention is to provide a golf ball having excellent durability and good shot feeling. The present invention provides a golf ball comprising a core, wherein a difference (crosslinking density at surface of core-crosslinking density at center of core) between a crosslinking density at a surface of the core and a crosslinking density at a center of the core is more than 1.0×10.sup.2 mol/m.sup.3 and less than 9.0×10.sup.2 mol/m.sup.3, and a hardness difference (Hs−Ho) between Hs and Ho is 13.0 or more and 30.0 or less, and the core satisfies H50−Ho>Hs−H50, wherein Hs (Shore C hardness) is a hardness at the surface of the core, Ho (Shore C hardness) is a hardness at the center of the core, and H50 (Shore C hardness) is a hardness at a midpoint between the center of the core and the surface of the core.

An object of the present invention is to provide a golf ball having excellent durability and good shot feeling. The present invention provides a golf ball comprising a core, wherein a difference (crosslinking density at surface of core-crosslinking density at center of core) between a crosslinking density at a surface of the core and a crosslinking density at a center of the core is more than 1.0×10.sup.2 mol/m.sup.3 and less than 9.0×10.sup.2 mol/m.sup.3, and a hardness difference (Hs−Ho) between Hs and Ho is 13.0 or more and 30.0 or less, and the core satisfies H50−Ho>Hs−H50, wherein Hs (Shore C hardness) is a hardness at the surface of the core, Ho (Shore C hardness) is a hardness at the center of the core, and H50 (Shore C hardness) is a hardness at a midpoint between the center of the core and the surface of the core.