Concentrates containing specific functionalised diblock copolymers serve as effective additives for improving the cold flow behaviour of fuels and oils, the copolymers being derived from a terminally-unsaturated intermediate polymer obtained via a metallocene process involving hydrogen.

Concentrates containing specific functionalized diblock copolymers serve as effective additives for improving the cold flow behavior of fuels and oils, the copolymers being derived from a terminally-unsaturated intermediate polymer obtained via a metallocene process involving hydrogen.

Concentrates containing specific functionalized diblock copolymers serve as effective additives for improving the cold flow behavior of fuels and oils, the copolymers being derived from a terminally-unsaturated intermediate polymer obtained via a metallocene process involving hydrogen.

There is provided a resin composition exhibiting excellent dielectric properties, high adhesion to a low-roughness surface, heat resistance, and excellent water-resistant reliability. This resin composition includes an arylene ether compound having a weight average molecular weight of 30000 or higher and a styrenic copolymer having, in its molecule, a reactive unsaturated bond that exhibits reactivity by heat or an ultraviolet ray.

Provided is a thermoplastic resin composition excellent in flexibility and mechanical strength with a good balance.

The thermoplastic resin composition includes 100 parts by mass of a thermoplastic resin which is hydrogenated product of a block copolymer including a polymer block (X) having a vinyl aromatic compound as a main component and a polymer block (Y) having a conjugated diene compound as a main component, and 1 to 400 parts by mass of a modified ethylene/-olefin copolymer satisfying the following requirements (b-1) to (b-3).

Requirement (b-1): the content of a structural unit derived from ethylene is 15 to 85 mol %.

Requirement (b-2): the weight-average molecular weight is in the range of 1,000 to 100,000.

Requirement (b-3): the modified ethylene/-olefin copolymer (B) is a modified copolymer having a substituent derived from one or more vinyl aromatic compounds, and the content of a moiety derived from the one or more vinyl aromatic compounds in the modified copolymer is in the range of 1 to 70% by mass.

A coating film capable of being peeled off in the shape of sheet to facilitate a coating film removal work, and is less likely to peel even after long periods of use on an underwater structure is provided. The coating film comprises an undercoat layer to be bonded to an underwater structure, and an antifouling layer bonded to the undercoat layer, wherein: a 100-gram underwater constant load peeling degree of the coating film is less than 5; a ratio of a tensile breaking strength of the coating film to an adhesive force of the coating film with respect to the underwater structure, as measured after immersing the coating film in pure water at 60 C. for 5 weeks is 1.5 or more; and a 1-mm square cross-cut stretching-caused peeling degree of the antifouling layer with respect to the undercoat layer is 0.05 or less.

The disclosure relates to a polymer composition comprising a styrenic block copolymer, a tackifier and at least an additive. The styrenic block copolymer is fully dissolved in a solvent system containing a first solvent and a decarboxylated rosin as a co-solvent in a ratio of 20:80 to 80:20. The styrenic block copolymer includes unhydrogenated styrenic block copolymers, partially hydrogenated styrenic block copolymer, fully hydrogenated styrenic block copolymer, and mixtures thereof. The polymer composition exhibits a higher softening point and reduced vertical slump at room temperature after 6 to 24 hours. The polymer composition is suitable for use in adhesives, sealants, and coating applications.

The disclosure relates to a polymer composition comprising a styrenic block copolymer, a tackifier and at least an additive. The styrenic block copolymer is fully dissolved in a solvent system containing a first solvent and a decarboxylated rosin as a co-solvent in a ratio of 20:80 to 80:20. The styrenic block copolymer includes unhydrogenated styrenic block copolymers, partially hydrogenated styrenic block copolymer, fully hydrogenated styrenic block copolymer, and mixtures thereof. The polymer composition exhibits a higher softening point and reduced vertical slump at room temperature after 6 to 24 hours. The polymer composition is suitable for use in adhesives, sealants, and coating applications.

Provided is a polymer film including a material A which is a liquid at 260 C., and a material B which is a solid at 260 C., in which the material A and the material B are phase-separated, in a cross section of the polymer film along a thickness direction, a ratio of a total length of phase-separated interfaces between the material A and the material B to a length of the polymer film in a direction perpendicular to the thickness direction at a thickness of 50 um is 2 or more, and the polymer film has an elastic modulus at 160 C. of 0.60 MPa or less, and a dielectric loss tangent of 0.01 or less.