Hydrogenated diene copolymer, polymer composition, and molded object

• US 20060178485A1
• Filed: 03/12/2004
• Published: 08/10/2006
• Est. Priority Date: 03/14/2003
• Status: Abandoned Application

• Current Assignee: JSR Corporation
• Original Assignee: JSR Corporation
• Inventors: Kodama, Kazuhisa, Toyoda, Nobuyuki, Shimakage, Masashi, Toyoizumi, Takashi
• Application Number:
  US10/548,875
• Publication Number:
  US 20060178485A1
• Time in Patent Office: Days
• US Class Current: 525/242
• CPC Class Codes: C08F 297/04 polymerising vinyl aromatic monomers and conjugated dienes
• CPC Class Codes: C08F 8/04 Reduction, e.g. hydrogenation
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 53/025 modified

Abstract

A hydrogenated diene-based copolymer satisfying predetermined conditions, which is obtained by hydrogenating a block copolymer containing at least two polymer blocks (A) composed mainly of a vinyl aromatic compound and at least one vinyl aromatic compound-conjugated diene compound copolymer block (B). The hydrogenated diene-based copolymer is per se superior in processability, flexibility, weather resistance, vibration-damping property and mechanical properties, and can provide a shaped article highly flexible and superior in various properties such as mechanical properties, appearance, mar resistance, weather resistance, heat resistance, vibration-damping property, processability and the like.

Claims

1. A hydrogenated diene-based copolymer which is obtained by hydrogenating a block copolymer containing at least two polymer blocks (A) composed mainly of a vinyl aromatic compound and at least one vinyl aromatic compound-conjugated diene compound copolymer block (B), and satisfies the following conditions (1) to (3):

(1) a content of the total vinyl aromatic compound units in the hydrogenated diene-based copolymer is 20 to 70% by mass,

(2) a proportion (BS) of the content of the vinyl aromatic compound unit contained in the block (B), to the content of the total vinyl aromatic compound units in the hydrogenated diene-based copolymer is 10 to 80%, and

(3) a content of the vinyl configuration derived from the conjugated diene compound, in the hydrogenated diene-based copolymer is 30 to 75%.

3. A hydrogenated diene-based copolymer according to claim 1, wherein at least 90% of the double bonds derived from the conjugated diene compound is hydrogenated.

4. A hydrogenated diene-based copolymer according to claim 1, which has a melt flow rate (MFR) of 10 to 200 g/10 min when measured at 230°

C. at a load of 21.2 N.

5. A hydrogenated diene-based copolymer according to claim 1 which has a melt flow rate (MFR) of 0.01 to 100 g/10 min when measured at 230°

C. at a load of 21.2 N.

6. A hydrogenated diene-based copolymer according to claim 1 which has a melt viscosity of 2,000 Pa·

s or less at 230°

C. at 0.1 Hz.

7. A polymer composition comprising a hydrogenated diene-based copolymer (a) set forth in claim 1 and a thermoplastic polymer (b) other than the hydrogenated diene-based copolymer (a), at a mass ratio of (a)/(b) 99/1 to 1/99 [(a)+(b)=100].

8. A polymer composition according to claim 7, wherein the thermoplastic polymer (b) is a propylene-based polymer.

9. A powder obtained by subjecting a polymer composition set forth in claim 8, to mechanical grinding, die face cutting or strand cutting.

10. A powder according to claim 9, which has a bulk specific gravity of 0.38 or more and a sphere-reduced average particle diameter of 1.2 mm or less.

11. A shaped article obtained by subjecting a powder set forth in claim 9, to powder molding.

12. A shaped article obtained by subjecting a hydrogenated diene-based copolymer set forth in claim 5, to extrusion molding.

13. A shaped article obtained by subjecting to extrusion molding a polymer composition set forth in claim 5, comprising a hydrogenated diene-based copolymer (a) and a thermoplastic polymer (b) at a mass ratio of (a)/(b)=99/1 to 1/99 [(a)+(b)=100].

14. A composition for foamed material, comprising a hydrogenated diene-based copolymer set forth in claim 1 and a foaming agent.

15. A composition for foamed material according to claim 14, further comprising a thermoplastic polymer other than the hydrogenated diene-based copolymer.

16. A foamed material obtained by foaming a composition for foamed material set forth in claim 14 or 15.

17. A soft film or sheet made of a hydrogenated diene-based copolymer set forth in claim 1.

18. A soft film or sheet made of a polymer composition comprising a hydrogenated diene-based copolymer (a) set forth claim 1 and a thermoplastic polymer (b) other than the hydrogenated diene-based copolymer (a), at a mass ratio of (a)/(b)=99/1 to 1/99 [(a)+(b)=100].

19. A soft film or sheet according to claim 17, wherein the thermoplastic polymer (b) is an olefin-based polymer.

20. A soft film or sheet according to claim 19, wherein the olefin-based polymer is a propylene-based polymer.

21. A tube made of a polymer composition comprising a hydrogenated diene-based copolymer (a) set forth in claim 1 and a thermoplastic polymer (b) other than the hydrogenated diene-based copolymer (a), at a mass ratio of (a)/(b)=99/1 to 50/50 [(a)+(b)=100].

22. A multilayered laminate comprising a base material layer and a surface layer formed on at least one side of the base material layer, wherein the surface layer is made of a polymer composition comprising an olefin-based resin (c) and a hydrogenated diene-based copolymer (a) set forth in claim 1, at a mass ratio of (c)/(a)=95/5 to 20/80 [(c)+(a)=100].

23. A multilayered laminate according to claim 22, wherein the base material layer is made of a resin composition comprising the olefin-based resin (c) and a hydrogenated diene-based copolymer (d) at a mass ratio of (c)/(d)=100/0 to 20/80 [(c)+(d)=100].

25. A medical resin composition comprising a hydrogenated diene-based copolymer set forth in claim 1 and a polyolefin type resin having a melting peak temperature of 100 to 200°

C. as measured by a differential scanning calorimetry (DSC).

26. A medical resin composition according to claim 25, wherein the proportions of the hydrogenated diene-based copolymer (a) and the polyolefin type resin (e) are (a)/(e)=90/10 to 10/90 [(a)+(e)=100] in terms of mass ratio.

27. A medical resin composition according to claim 25, wherein the polyolefin type resin is a polypropylene type resin.

28. A medical shaped article made of a medical resin composition set forth in claim 25.

29. A medical shaped article according to claim 28, which is a medical tube, a cathetel, a clysis bag, a blood bag, a bag for continuous ambulatory peritoneal dialysis (CAPD), or a drainage bag for continuous ambulatory peritoneal dialysis (CAPD).

2. A hydrogenated diene-based copolymer which is obtained by hydrogenating a block copolymer containing at least two polymer blocks (A) composed mainly of a vinyl aromatic compound and at least one vinyl aromatic compound-conjugated diene compound copolymer block (B), and satisfies the following conditions (1) to (3):

(1) a content of the total vinyl aromatic compound units in the hydrogenated diene-based copolymer is 20 to 70% by mass,

(2) a proportion (LS) of the content of the long-chain vinyl aromatic compound unit to the content of the total vinyl aromatic compound units in the hydrogenated diene-based copolymer is 10 to 80%, and

(3) a content of the vinyl configuration derived from the conjugated diene compound, in the hydrogenated diene-based copolymer is 30 to 75%.

24. A process for producing a multilayered laminate comprising a base material layer and a surface layer formed on at least one side of the base material layer, which process comprises a step of subjecting to co-extrusion a polymer composition comprising an olefin-based resin (c) and a hydrogenated diene-based copolymer (a) at a mass ratio of (c)/(a)=95/5 to 20/80 [(c)+(a)=100] and a resin composition comprising the olefin-based resin (c) and a hydrogenated diene-based copolymer (d) at a mass ratio of (c)/(d)=100/0 to 20/80 [(c)+(d)=100], to form a surface layer made of the polymer composition on at least one side of a base material layer made of the resin composition wherein the hydrogenated diene-based copolymer (a) is obtained by hydrogenating a block copolymer containing at least two polymer blocks (A) composed mainly of a vinyl aromatic compound and at least one vinyl aromatic compound-conjugated diene compound copolymer block (B) and which satisfies the following conditions (1) to (3):

(1) a content of the total vinyl aromatic compound units in the hydrogenated diene-based copolymer is 20 to 70% by mass,

(2) a proportion (BS) of the content of the vinyl aromatic compound unit contained in the block (B), to the content of the total vinyl aromatic compound units in the hydrogenated diene-based copolymer is 10 to 80%, and

(3) a content of the vinyl configuration derived from the conjugated diene compound, in the hydrogenated diene-based copolymer is 30 to 75%.