RU2011152875A

RU2011152875A - RUBBER MIX AND TIRE MANUFACTURED WITH ITS USE

Info

Publication number: RU2011152875A
Application number: RU2011152875/05A
Authority: RU
Inventors: Урара ТАКАДО; Кодзи МАСАКИ
Original assignee: Бриджстоун Корпорейшн
Filing date: 2009-06-26
Publication date: 2013-06-27

Claims

1. The rubber mixture, characterized by compounding more than 1 parts by weight, but less than 30 parts by weight a polymer component with a low molecular weight (B), which is a copolymer of an aromatic vinyl compound and a conjugated diene compound or a polymer of a conjugated diene compound having a bound aromatic vinyl compound (S ₂ ) content of less than 30 wt.% and a weight average molecular weight in terms of polystyrene 0.2 · 10 ⁴ -8.0 · 10 ⁴ , and not less than 5 parts by weight filler (C) per 100 parts by weight a polymer component with a high molecular weight (A), which is a copolymer of an aromatic vinyl compound and a conjugated diene compound or a polymer of a conjugated diene compound having a bound aromatic vinyl compound (S ₁ ) content of not more than 80 wt.% and a weight average molecular weight in terms of polystyrene not less than 1.5 · 10 ⁵ ,

moreover, the content of the bound aromatic vinyl compound (S ₂ ) (wt.%) in the polymer component with a low molecular weight (B) and the content of vinyl bonds (V ₂ ) (%) in the part of the conjugated diene compound in the polymer component with a low molecular weight (B) ) satisfy the relation of the following equation (I):

.

2. The rubber mixture, characterized by compounding more than 1 parts by weight, but less than 30 parts by weight a polymer component with a low molecular weight (B), which is a copolymer of an aromatic vinyl compound and a conjugated diene compound or a polymer of a conjugated diene compound having a bound aromatic vinyl compound (S ₂ ) content of less than 30 wt.% and a weight average molecular weight in terms of polystyrene 0.2 · 10 ⁴ -8.0 · 10 ⁴ , and not less than 5 parts by weight filler (C) per 100 parts of the mass. a polymer component with a high molecular weight (A), which is a copolymer of an aromatic vinyl compound and a conjugated diene compound or a polymer of a conjugated diene compound having a bound aromatic vinyl compound (S ₁ ) content of not more than 80 wt.% and a weight average molecular weight in terms of polystyrene not less than 1.5 · 10 ⁵ ,

moreover, the content of the bound aromatic vinyl compound (S ₁ ) (wt.%) and the content of vinyl bonds (V ₁ ) (%) in the part of the conjugated diene compound in the high molecular weight polymer component (A) and the content of the bound aromatic vinyl compound (S ₂ ) (wt.%) and the content of vinyl bonds (V ₂ ) (%) in the part of the conjugated diene compound in the polymer component with a low molecular weight (B) satisfy the ratio of the following equation (II):

3. The rubber composition according to claim 1 or 2, in which the total content of the bound aromatic vinyl compound (S ₁ ) and the bound aromatic vinyl compound (S ₂ ) is not more than 5 wt.%.

4. The rubber mixture according to claim 1 or 2, in which the extractability of chloroform after vulcanization is at least 15 wt.% With respect to the weight of the polymer component with a low molecular weight (B).

5. The rubber mixture according to claim 1 or 2, in which the weight average molecular weight of the polymer component with a low molecular weight (B) in terms of polystyrene is 4.0 · 10 ⁴ -8.0 · 10 ⁴ .

6. The rubber mixture according to claim 1 or 2, in which the content of the polymer component with a low molecular weight (B) is 5-25 wt.h. per 100 parts by weight high molecular weight polymer component (A).

7. A tire in the tread of which a rubber mixture is used according to any one of claims 1 to 6.