Modified Conjugated Diene-Based Polymer, Polymer Composition, and Rubber Composition
US-2020199258-A1 · Jun 25, 2020 · US
Modified conjugated diene-based polymer, polymer composition, and rubber composition
US11292862B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11292862-B2 |
| Application number | US-201816491306-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 5, 2018 |
| Priority date | Mar 7, 2017 |
| Publication date | Apr 5, 2022 |
| Grant date | Apr 5, 2022 |
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Abstract
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A modified conjugated diene-based polymerhaving a weight average molecular weight of 20×104 or more and 300×104 or less, andhaving a molecular weight distribution Mw/Mn of 1.6 or more and 4.0 or less, whereina modification ratio with respect to a total amount of the conjugated diene-based polymer is 50% by mass or more,a modification ratio of a component having a molecular weight which is ½ of a molecular weight at a peak top, or a peak top of the minimum molecular weight when a plurality of the peak tops of molecular weights is present, in a gel permeation chromatography curve is½ or more of the modification ratio with respect to the total amount of the conjugated diene-based polymer, anda content of nitrogen contained in the modified conjugated diene-based polymer is 3 mass ppm or more and 70 mass ppm or less.
First claim
Opening claim text (preview).
The invention claimed is: 1. A modified conjugated diene-based polymer: having a weight average molecular weight of 20×10 4 or more and 300×10 4 or less, and having a molecular weight distribution Mw/Mn of 1.6 or more and 4.0 or less, wherein a modification ratio with respect to a total amount of the conjugated diene-based polymer is 50% by mass or more, a modification ratio of a component having a molecular weight which is ½ of a molecular weight at a peak top, or a peak top of the minimum molecular weight when a plurality of the peak tops of molecular weights is present, in a gel permeation chromatography (GPC) curve is ½ or more of the modification ratio with respect to the total amount of the conjugated diene-based polymer, a content of nitrogen contained in the modified conjugated diene-based polymer is 3 mass ppm or more and 70 mass ppm or less, and the modified conjugated diene-based polymer is a copolymer of a conjugated diene compound and a vinyl-substituted aromatic compound. 2. The modified conjugated diene-based polymer according to claim 1 , wherein a shrinkage factor (g′) measured by 3D-GPC is 0.86 or more and 1.0 or less. 3. The modified conjugated diene-based polymer according to claim 1 , wherein a shrinkage factor (g′) measured by 3D-GPC is 0.30 or more and less than 0.86. 4. The modified conjugated diene-based polymer according to claim 3 , wherein a shrinkage factor (g′) measured by 3D-GPC is 0.30 or more and 0.70 or less. 5. The modified conjugated diene-based polymer according to claim 1 , wherein each of contents of nitrogen and silicon contained in the modified conjugated diene-based polymer is 3 mass ppm or more, and a molar ratio of nitrogen to silicon is 1.1 or more and less than 10. 6. The modified conjugated diene-based polymer according to claim 1 , wherein each of contents of nitrogen and silicon contained in the modified conjugated diene-based polymer is 3 mass ppm or more, and a molar ratio of nitrogen to silicon is 0.1 or more and less than 0.9. 7. The modified conjugated diene-based polymer according to claim 1 , wherein a glass transition temperature of the modified conjugated diene-based polymer is −20° C. or more and 0° C. or less. 8. The modified conjugated diene-based polymer according to claim 1 , wherein a glass transition temperature of the modified conjugated diene-based polymer is −50° C. or more and less than −20° C. 9. The modified conjugated diene-based polymer according to claim 1 , wherein a glass transition temperature of the modified conjugated diene-based polymer is −70° C. or more and less than −50° C. 10. A polymer composition comprising 10% by mass or more of the modified conjugated diene-based polymer according to claim 1 . 11. A rubber composition comprising: 100 parts by mass of a rubber-like polymer containing 10% by mass or more of the modified conjugated diene-based polymer according to claim 1 ; and 5 to 150 parts by mass of a filler.
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Introducing nitrogen atoms or nitrogen-containing groups · CPC title
Compositions of unspecified rubbers · CPC title
Silica · CPC title
as weight or mass percentages · CPC title
Introducing metal atoms or metal-containing groups · CPC title
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- What does patent US11292862B2 cover?
- A modified conjugated diene-based polymerhaving a weight average molecular weight of 20×104 or more and 300×104 or less, andhaving a molecular weight distribution Mw/Mn of 1.6 or more and 4.0 or less, whereina modification ratio with respect to a total amount of the conjugated diene-based polymer is 50% by mass or more,a modification ratio of a component having a molecular weight which is ½ of …
- Who is the assignee on this patent?
- Asahi Chemical Ind
- What technology area does this patent fall under?
- Primary CPC classification C08F36/00. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 05 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).