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Thermoplastic Elastomer Composition, Vibration-damping Material, Gear, and Molded Composite Object
| Content Provider | The Lens |
|---|---|
| Abstract | Provided is a thermoplastic elastomer composition and the like which can have improved vibration-damping properties while retaining properties inherent in a polyester-based thermoplastic elastomer. The thermoplastic elastomer composition contains a polyester-based thermoplastic elastomer (A) and a hydrogenated aromatic vinyl compound-based elastomer (B) having a glass transition temperature Tg of -10 to 40°C, wherein the hydrogenated aromatic vinyl compound-based elastomer (B) is a hydrogenate of a block copolymer containing a polymer block (a) having a structural unit derived from an aromatic vinyl compound and a polymer block (b) having a structural unit derived from a conjugated diene compound, and the ratio by mass of the polyester-based thermoplastic elastomer (A) to the hydrogenated aromatic vinyl compound-based elastomer (B), (A/B) is 99/1 to 1/99. |
| Related Links | https://www.lens.org/images/patent/EP/4083135/A1/EP_4083135_A1.pdf |
| Language | English |
| Publisher Date | 2022-11-02 |
| Access Restriction | Open |
| Alternative Title | Thermoplastische Elastomerzusammensetzung, Schwingungsdämpfendes Material, Zahnrad Und Geformter Verbundstoffgegenstand Composition D'élastomère Thermoplastique, Matériau D'amortissement, Engrenage, Et Corps Moulé Composite |
| Content Type | Text |
| Resource Type | Patent |
| Date Applied | 2020-12-10 |
| Agent | Müller-boré & Partner Patentanwälte Partg Mbb |
| Applicant | Kuraray Co |
| Application No. | 20907889 |
| Claim | A thermoplastic elastomer composition comprising a polyester-based thermoplastic elastomer (A) and a hydrogenated aromatic vinyl compound-based elastomer (B) having a glass transition temperature Tg of -10 to 40°C, wherein: the hydrogenated aromatic vinyl compound-based elastomer (B) is a hydrogenate of a block copolymer containing a polymer block (a) having a structural unit derived from an aromatic vinyl compound and a polymer block (b) having a structural unit derived from a conjugated diene compound, and the ratio by mass of the polyester-based thermoplastic elastomer (A) to the hydrogenated aromatic vinyl compound-based elastomer (B), (A/B) is 99/1 to 1/99. The thermoplastic elastomer composition according to claim 1, wherein a ratio of the storage elastic modulus G' at 0°C (G'(0°C)) to the storage elastic modulus G' at 50°C (G'(50°C)), (G'(0°C)/G'(50°C)) of the hydrogenated aromatic vinyl compound-based elastomer (B) is more than 10. The thermoplastic elastomer composition according to claim 1 or 2, wherein the ratio by mass of the polyester-based thermoplastic elastomer (A) to the hydrogenated aromatic vinyl compound-based elastomer (B), (A/B) is 75/25 to 95/5. The thermoplastic elastomer composition according to any one of claims 1 to 3, wherein the content of the polymer block (a) in the block copolymer is 30% by mass or less. The thermoplastic elastomer composition according to claim 4, wherein the content of the polymer block (a) in the block copolymer is 16% by mass or less. The thermoplastic elastomer composition according to any one of claims 1 to 5, wherein the conjugated diene compound contains isoprene. The thermoplastic elastomer composition according to any one of claims 1 to 6, wherein the polymer block (b) has a structural unit containing at least one alicyclic skeleton (X) represented by the following formula (X) in the main chain: wherein R1 to R3 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 11 carbon atoms, and plural R1 to R3 each may be the same or different. The thermoplastic elastomer composition according to claim 7, wherein at least one alicyclic skeleton (X) is an alicyclic skeleton (X') where at least one of R1, R2 or R3 is a hydrocarbon group having 1 to 11 carbon atoms. The thermoplastic elastomer composition according to any one of claims 1 to 8, wherein the hydrogenation rate of the polymer block (b) is 85 to 99 mol%. The thermoplastic elastomer composition according to any one of claims 1 to 9, wherein the vinyl bond content in the polymer block (b) is 65 to 90 mol%. The thermoplastic elastomer composition according to any one of claims 1 to 10, wherein the weight-average molecular weight of the hydrogenated aromatic vinyl compound-based elastomer (B) is 30,000 to 300,000. The thermoplastic elastomer composition according to any one of claims 1 to 11, wherein the peak top intensity of tanδ of the hydrogenated aromatic vinyl compound-based elastomer (B) is 1 or more. The thermoplastic elastomer composition according to any one of claims 1 to 12, wherein the maximum value of the tanδ intensity at 0 to 40°C of the thermoplastic elastomer composition is 0.1 or more. The thermoplastic elastomer composition according to claim 13, wherein the maximum value of the tanδ intensity at 0 to 40°C of the thermoplastic elastomer composition is 0.15 or more. The thermoplastic elastomer composition according to any one of claims 1 to 13, wherein the maximum value of the tanδ intensity at 0 to 40°C of the polyester-based thermoplastic elastomer (A) is 0.05 or more. The thermoplastic elastomer composition according to any one of claims 1 to 15, wherein the ratio of the maximum value of the tanδ intensity at 0 to 40°C of the hydrogenated aromatic vinyl compound-based elastomer (B) to the maximum value of the tanδ intensity at 0 to 40°C of the polyester-based thermoplastic elastomer (A), (tanδ(B)max/tanδ(A)max) is 10 to 80. A vibration-damping material comprising the thermoplastic elastomer composition of any one of claims 1 to 16. A gear comprising the thermoplastic elastomer composition of any one of claims 1 to 16. A composite molded object, wherein a thermoplastic elastomer composition layer containing the thermoplastic elastomer composition of any one of claims 1 to 16 bonds by fusion to a polar resin layer containing a polar resin. |
| CPC Classification | MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS COMPOSITIONS OF MACROMOLECULAR COMPOUNDS |
| Extended Family | 171-052-065-971-04X 038-743-015-701-026 110-887-687-135-946 109-283-304-435-448 185-830-468-348-822 090-343-093-963-614 082-192-593-353-876 |
| Patent ID | 4083135 |
| Inventor/Author | Senda Yasushi Kato Masahiro |
| IPC | C08L53/02 C08L67/00 |
| Status | Pending |
| Simple Family | 171-052-065-971-04X 038-743-015-701-026 110-887-687-135-946 109-283-304-435-448 185-830-468-348-822 090-343-093-963-614 082-192-593-353-876 |
| CPC (with Group) | C08F297/046 C08F8/04 C08L53/025 C08L67/025 C08L2205/025 C08L67/00 |
| Issuing Authority | European Patent Office (EPO) |
| Kind | Patent Application Publication |
