Polymer and asphalt composition
First Claim
1. A polymer comprising a conjugated diene monomer unit and a vinyl aromatic monomer unit,wherein the polymer has a polymer block (A) comprising the vinyl aromatic monomer unit as a main component and a polymer block (B) comprising the conjugated diene monomer unit and the vinyl aromatic monomer unit,a content of the polymer block (A) is 10% by mass or more and 40% by mass or less,a bulk density of the polymer is 0.05 g/mL or more and 0.45 g/mL or less, anda specific surface area of the polymer is 0.10 m2/g or more and 0.60 m2/g or less,in the polymer block (B), a content of a short-chain vinyl aromatic monomer-polymerized moiety comprising 2 to 6 vinyl aromatic monomer units is 50% by mass or more based on the content of the vinyl aromatic monomer unit being 100% by mass.
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Abstract
The polymer according to the present invention is a polymer containing a conjugated diene monomer unit and a vinyl aromatic monomer unit, wherein the polymer has a polymer block (A) containing the vinyl aromatic monomer unit as a main component and a polymer block (B) containing the conjugated diene monomer unit and the vinyl aromatic monomer unit, a content of the polymer block (A) is 10% by mass or more and 40% by mass or less, a bulk density of the polymer is 0.05 g/mL or more and 0.45 g/mL or less, and a specific surface area of the polymer is 0.10 m2/g or more and 0.60 m2/g or less.
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Citations
17 Claims
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1. A polymer comprising a conjugated diene monomer unit and a vinyl aromatic monomer unit,
wherein the polymer has a polymer block (A) comprising the vinyl aromatic monomer unit as a main component and a polymer block (B) comprising the conjugated diene monomer unit and the vinyl aromatic monomer unit, a content of the polymer block (A) is 10% by mass or more and 40% by mass or less, a bulk density of the polymer is 0.05 g/mL or more and 0.45 g/mL or less, and a specific surface area of the polymer is 0.10 m2/g or more and 0.60 m2/g or less, in the polymer block (B), a content of a short-chain vinyl aromatic monomer-polymerized moiety comprising 2 to 6 vinyl aromatic monomer units is 50% by mass or more based on the content of the vinyl aromatic monomer unit being 100% by mass.
Specification