A latex of a styrene-based block copolymer includes a styrene-based block copolymer and water. The styrene-based block copolymer includes a toluene insoluble content of 30 to 95 wt %. The latex of the styrene-based block copolymer is superior in the processability and can provide a molded film such as a dip-molded product having the high tear strength, the high stress retention and the soft texture.

Disclosed is a hydrogenated copolymer obtained by hydrogenating a copolymer which comprises an aromatic vinyl monomer unit and a chain conjugated diene monomer unit. When, among at least two hydrogenated copolymer-derived peaks in an elution curve measured by gel permeation chromatography of a sample containing the hydrogenated product, a hydrogenated copolymer-derived peak exhibiting a peak top with the earliest elution time is defined as a first peak and a hydrogenated copolymer-derived peak exhibiting a peak top with the second earliest elution time is defined as a second peak, the ratio of a standard polystyrene-equivalent molecular weight based on the elution time of the first peak (first peak molecular weight) to a standard polystyrene-equivalent molecular weight based on the elution time of the second peak (second peak molecular weight) is 1.50 or more. The second peak molecular weight is 1,000 or more.

A block copolymer comprising a polymer block (A) mainly comprising a vinyl aromatic monomer unit, and a polymer block (B) mainly comprising a conjugated diene monomer unit, the block copolymer being represented by the following general formula (1) or (2):

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wherein each curved portion represents a saturated or unsaturated hydrocarbon group having 1 to 20 carbon atoms which is unsubstituted or optionally has a substituent, X represents a group 1 element, and “polymer” represents a polymer moiety.

A solid-phase adhesive that includes, based on 100 percent of the solids weight of the solid-phase adhesive, a low molecular weight resin, a triblock copolymer and a hydrophobic liquid. The low molecular weight resin is at a concentration of least 20 weight percent and is produced by the polymerization and hydrogenation of styrenic monomer feedstock having a ring and ball softening point of between about 10° C. and about 45° C. The triblock copolymer is at a concentration of between about 2 weight percent and about 40 weight percent and includes a saturated elastomeric block intermediate opposite ends thereof and a thermoplastic block on each end. The hydrophobic liquid is at a concentration of up to about 50 weight percent.

The present invention relates to a resin composition containing a modified hydrogenated product (A) of a block copolymer containing a polymer block (A-1) having a structural unit derived from an aromatic vinyl compound and a polymer block (A-2) having a structural unit derived from a conjugated diene compound, and a polyolefin resin (B), wherein the modified hydrogenated product (A) has one or two or more functional groups selected from an alkoxysilyl group, a carboxy group, an amino group, a hydroxy group, an epoxy group, and a group derived from an acid anhydride, and the polymer block (A-2) has a vinyl bond amount of 50 to 99 mol %; and the resin composition further containing a polar resin (C).

There are provided a thermoplastic resin composition capable of bonding a cyclic polyolefin-based polymer and an ethylene-vinyl alcohol copolymer with sufficient strength and to provide a laminate using the same.

There are provided a thermoplastic resin composition capable of bonding a cyclic polyolefin-based polymer and an ethylene-vinyl alcohol copolymer with sufficient strength and to provide a laminate using the same.

A hydrogenated styrenic block copolymer (HSBC) is disclosed comprising, prior to hydrogenation, a polymer block A of at least one vinyl aromatic monomer, a polymer block B of at least one conjugated diene, and a copolymer block C of at least one vinyl aromatic monomer and 1,3-butadiene monomer. The HSBC has a total vinyl aromatic content of 15 to 60 wt. % and an aromatic blockiness index of 20 to 80%. The viscoelastic properties of HSBC show a value of a tan δ peak height of 0.7 to 2, a tan δ peak temperature of −40 to 25° C., and a temperature width value (in ° C.) at half the tan δ peak height of 17 to 40. The HSBC provides improved mechanical properties and can be used in preparation of adhesives and protective films applications.

A hydrogenated styrenic block copolymer (HSBC) is disclosed comprising, prior to hydrogenation, a polymer block A of at least one vinyl aromatic monomer, a polymer block B of at least one conjugated diene, and a copolymer block C of at least one vinyl aromatic monomer and 1,3-butadiene monomer. The HSBC has a total vinyl aromatic content of 15 to 60 wt. % and an aromatic blockiness index of 20 to 80%. The viscoelastic properties of HSBC show a value of a tan δ peak height of 0.7 to 2, a tan δ peak temperature of −40 to 25° C., and a temperature width value (in ° C.) at half the tan δ peak height of 17 to 40. The HSBC provides improved mechanical properties and can be used in preparation of adhesives and protective films applications.

An objective of the present invention is to provide a hot melt composition having a high form maintaining property at a high temperature and being in excellent adhesion to a substrate and in disassembly. The present invention relates to a hot melt composition comprising: (A1) a styrene-ethylene-ethylene/propylene-styrene block copolymer (SEEPS) and (B1) a hydrocarbon-based oil having an aniline point of 135° C. or more.