초록

The disclosure provides a hydrogenated straight-chain block copolymer, obtained by selective hydrogenation of a straight-chain block copolymer.

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1. A hydrogenated straight-chain block copolymer, obtained by selective hydrogenation of a straight-chain block copolymer comprising: i. at least two polymer blocks A, on both terminals thereof, which each comprise a vinyl aromatic monomer unit as a main component and which may be the same or differ

1. A hydrogenated straight-chain block copolymer, obtained by selective hydrogenation of a straight-chain block copolymer comprising: i. at least two polymer blocks A, on both terminals thereof, which each comprise a vinyl aromatic monomer unit as a main component and which may be the same or different from each other;ii. at least two polymer blocks B, internally in relation to the polymer blocks A, which each comprise a conjugated diene monomer unit having 5 or more carbon atoms as a main component and which may be the same or different from each other; andiii. one or more polymer blocks selected from a. one or more polymer blocks C which each comprise a conjugated diene monomer unit having 4 or more carbon atoms as a main component and which may be the same or different from each other,b. one or more random copolymer blocks D which each comprise a conjugated diene monomer unit having 4 or more carbon atoms (d-1) and a vinyl aromatic monomer unit (d-2) as main components and which may be the same or different, andc. a combination of the polymer blocks C and D,wherein: a. the polymer block A has a weight-average molecular weight M of 21,000 or more;b. the polymer block B has a hydrogenation rate of 50% or less for olefinic unsaturated double bonds;c. the polymer blocks C and D have a hydrogenation rate of 80% or more for olefinic unsaturated double bonds;d. the block copolymer comprises 10% by weight to 85% by weight of the vinyl aromatic monomer unit;e. the block copolymer has contents of 10% by weight to 70% by weight of A, 1% by weight to 15% by weight of B, 0% by weight to 85% by weight of C, 0% by weight to 85% by weight of D and 25% by weight to 85% by weight of C+D, based on 100% by weight of the total of A+B+C+D; andf. the A, B, C, and D are arranged linearly. 2. The hydrogenated block copolymer according to claim 1, obtained by hydrogenation of a block copolymer comprising 2% by weight to 80% by weight of the random copolymer block D. 3. The hydrogenated block copolymer according to claim 1, obtained by hydrogenation of a block copolymer comprising 2% by weight to 80% by weight of the polymer block C. 4. The hydrogenated block copolymer according to claim 1, wherein the random copolymer D has a ratio of 30% by weight or more for the vinyl aromatic monomer unit (d-2) with respect to 100% by weight of the random copolymer D. 5. The hydrogenated block copolymer according to claim 1, wherein the polymer block C has a vinyl bond amount of 15% to 80% in the whole conjugated diene. 6. The hydrogenated block copolymer according to claim 1, wherein the polymer block D has a vinyl bond amount of 10% to 50% in the whole conjugated diene. 7. The hydrogenated block copolymer according to claim 1, wherein the conjugated diene of the polymer block B is isoprene. 8. The hydrogenated block copolymer according to claim 1, wherein the conjugated dienes of the polymer block C and the polymer block D are 1,3-butadiene. 9. The hydrogenated block copolymer according to claim 1, wherein the conjugated diene of the polymer block B is isoprene; and the conjugated dienes of the polymer block C and the polymer block D are 1,3-butadiene, andwherein the block copolymer is hydrogenated using a compound comprising a titanocene compound as a hydrogenation catalyst; 90% or more of 1,3-butadiene of the polymer block C and the polymer block D is hydrogenated; and 90% or more of 1,4-bonds in isoprene of the polymer block B is not hydrogenated, and the hydrogenation rate of 3,4-bonds therein is 50% or less. 10. The hydrogenated block copolymer according to claim 1, obtained by hydrogenation of the block copolymer comprising three or more polymer blocks B and at least one polymer block B as an internal block. 11. The hydrogenated block copolymer according to claim 1, wherein the terminal block parts of the hydrogenated block copolymer comprise the polymer block A; and the hydrogenated block copolymer is a straight-chain block copolymer represented by the general formula shown below: H—(S—H)n, or a straight-chain block copolymer represented by the general formula shown below: [(H—S)k]m—X,[H—(S—H)k]m—X, wherein H denotes a block copolymer of A-B or B-A, or a random copolymer of A/B, and H's may be the same or different; S denotes a homoblock of C or a homoblock of D, or a block copolymer of C-D or D-C, and may contain 10% by weight or less of the B block, and S's may be the same or different; n and k are each an integer of 1 to 5, and m is an integer of 2 to 6; X denotes a residue of a coupling agent or a residue of a polyfunctional initiator; and when the polymer blocks A to D are each present in a plural number in the copolymer, the respective structures such as molecular weights and compositions may be each the same or different. 12. The hydrogenated block copolymer according to claim 1, having a weight-average molecular weight of 30,000 to 2,000,000 in terms of polystyrene. 13. The functionalized hydrogenated block copolymer according to claim 1, wherein the polymer block B containing residual olefinic unsaturated double bonds comprises a functional group. 14. A dynamic crosslinking composition comprising 10 to 300 parts by weight of a thermoplastic resin and 0.01 to 30 parts by weight of a crosslinking agent with respect to 100parts by weight of the hydrogenated block copolymer or the functionalized hydrogenated block copolymer according to claim 1. 15. A dynamically crosslinked body, obtained by melting and kneading the dynamic crosslinking composition according to claim 14 at a high temperature. 16. A crosslinking and foaming composition comprising the hydrogenated block copolymer or the functionalized hydrogenated block copolymer according to claim 1, a crosslinking agent, and a foaming agent. 17. A crosslinked and foamed body, obtained by crosslinking and foaming the crosslinking and foaming composition according to claim 16. 18. A functionalized hydrogenated block copolymer resin composition, comprising the functionalized hydrogenated block copolymer (E) according to claim 13, and a polar thermoplastic resin (F) having a functional group reactive with the component (E), and/or a rubbery polymer (F) having a functional group reactive with the component (E), wherein the formulation ratio (weight ratio) of the component(s) (E) to the component (F) is 1/99 to 99/1. 19. The functionalized hydrogenated block copolymer resin composition according to claim 18, wherein the component (F) is at least one polar thermoplastic resin selected from polyester resins, polyamide resins, polycarbonate resins, polyurethane resins, polyphenylene ether resins and polyoxymethylene resins. 20. A method of manufacturing a dynamic crosslinking composition comprising selectively hydrogenating a straight-chain block copolymer comprising: at least two polymer blocks A which each comprise a vinyl aromatic monomer unit as a main component and which may be the same or different from each other;at least two polymer blocks B which each comprise a conjugated diene monomer unit having 5 or more carbon atoms as a main component and which may be the same or different from each other; andone or more polymer blocks C which each comprise a conjugated diene monomer unit having 4or more carbon atoms as a main component and which may be the same or different from each other; and/or one or more random copolymer blocks D which each comprise a conjugated diene monomer unit having 4 or more carbon atoms (d-1) and a vinyl aromatic monomer unit (d-2) as main components and which may be the same or different,wherein the polymer block A has a weight-average molecular weight M of 21,000 or more;the polymer block B has a hydrogenation rate of 50% or less for olefinic unsaturated double bonds;the polymer blocks C and D have a hydrogenation rate of 80% or more for olefinic unsaturated double bonds;the block copolymer comprises 10% by weight to 85% by weight of the vinyl aromatic monomer unit;the block copolymer has contents of 10% by weight to 70% by weight of A, 1% by weight to 15% by weight of B, 0% by weight to 85% by weight of C, 0% by weight to 85% by weight of D and 25% by weight to 85% by weight of C+D, based on 100% by weight of the total of A+B+C+D;andthe A, B, C, and D are arranged linearly. 21. The hydrogenated block copolymer according to claim 1, wherein the hydrogenated straight-chain block copolymer excludes the polymer block D. 22. The method according to claim 20, wherein the hydrogenated straight-chain block copolymer excludes the polymer block D. 23. The hydrogenated block copolymer according to claim 1, wherein the hydrogenated straight-chain block copolymer excludes the polymer block D. 24. The method according to claim 20, the hydrogenated straight-chain block copolymer excludes the polymer block D. 25. The hydrogenated block copolymer according to claim 1, wherein the hydrogenated straight-chain block copolymer consists of the polymer blocks A, the polymer blocks B, and the one or more polymer blocks C and/or the one or more random copolymer blocks D. 26. The method according to claim 20, wherein the hydrogenated straight-chain block copolymer consists of the polymer blocks A, the polymer blocks B, and the one or more polymer blocks C and/or the one or more random copolymer blocks D.