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US 2014/0155536 A1Published application
Rubber composition and tire
AssigneesAmyris, Inc., Kuraray Co., Ltd.
InventorsShigenao Kuwahara, Kei Hirata, Daisuke Koda
Life of this patent
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Abstract
The present invention relates to a rubber composition including (A) at least one rubber component selected from the group consisting of a synthetic rubber and a natural rubber; (B) a polymer of farnesene having a weight-average molecular weight of not less than 2,000 and less than 25,000; and (C) carbon black.
Claims11
1:
- A rubber composition, comprising:
- (A) at least one rubber component selected from the group consisting of a synthetic rubber and a natural rubber;
- (B) from 0.1 to 100 parts by mass of a polymer of farnesene having a weight-average molecular weight of not less than 2,000 and less than 25,000, based on 100 parts by mass of the rubber component (A);
- and
- (C) from 0.1 to 100 parts by mass of carbon black having an average particle size of from 5 to 100 nm, based on 100 parts by mass of the rubber component (A).
2 more elements
2:
- The rubber composition of claim 1, wherein the polymer (B) is a homopolymer of β-farnesene.
3:
- The rubber composition of claim 1, wherein the polymer (B) has a melt viscosity of from 0.1 to 3.5 Pa·s as measured at 38° C.
4-5. (canceled)
6:
- The rubber composition of claim 1, wherein the synthetic rubber is at least one rubber selected from the group consisting of a styrene-butadiene rubber, a butadiene rubber and an isoprene rubber.
7:
- The rubber composition of claim 6, wherein the styrene-butadiene rubber has a weight-average molecular weight of from 100,000 to 2,500,000.
8:
- The rubber composition of claim 6, wherein the styrene-butadiene rubber has a styrene content of from 0.1 to 70% by mass.
9:
- The rubber composition of claim 6, wherein the butadiene rubber has a weight-average molecular weight of from 90,000 to 2,000,000.
10:
- The rubber composition of claim 6, wherein the butadiene rubber has a vinyl content of 50% by mass or less.
11:
- The rubber composition of claim 1, wherein the polymer (B) has a molecular weight distribution (Mw/Mn) of from 1.0 to 2.0.
12:
- A tire, comprising at least partially the rubber composition of claim 1.