Tire tread reinforced with a silica of low specific surface area
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08K-003/34
C08K-003/00
출원번호
US-0745649
(2003-12-29)
등록번호
US-7300970
(2007-11-27)
우선권정보
FR-01 08784(2001-06-28)
발명자
/ 주소
Durel,Olivier
Rauline,Roland
출원인 / 주소
Michelin Recherche et Technique S.A.
대리인 / 주소
Buchanan Ingersoll & Rooney PC
인용정보
피인용 횟수 :
34인용 특허 :
23
초록▼
A tire tread incorporating an elastomeric composition reinforced by an inorganic filler, based on at least: (i) a diene elastomer; (ii) as reinforcing inorganic filler, more than 80 phr of a silica of low specific surface area having the following characteristics: (a) a BET specific surface area
A tire tread incorporating an elastomeric composition reinforced by an inorganic filler, based on at least: (i) a diene elastomer; (ii) as reinforcing inorganic filler, more than 80 phr of a silica of low specific surface area having the following characteristics: (a) a BET specific surface area of less than 130 m2/g; (b) an average particle size, dw, of between 30 and 300 nm; (iii) a coupling agent providing the bond between the reinforcing inorganic filler and the diene elastomer; (iv) a vulcanization system comprising sulfur, a vulcanization accelerator and between 0.5 and 1.5 phr of zinc as vulcanization activator. Preferably, this silica furthermore has a disagglomeration rate α greater than 5횞103 μm-1/min (measured in the ultrasound disagglomeration test). Compared with a conventional tread for "Green Tires" which is reinforced with a silica of higher specific surface area, the tread of the invention has an improved compromise of (wear resistance/rolling resistance/grip on wet ground) performances. The use of a very small amount of zinc makes it possible to overcome an increase in the induction delays during the vulcanization, when such a silica of low specific surface area is used.
대표청구항▼
The invention claimed is: 1. A tire having a tread incorporating an elastomeric composition reinforced with an inorganic filler, said composition comprising: (i) a diene elastomer; (ii) as reinforcing inorganic filler, more than 80 phr of a silica having the following features: (a) a BET specific s
The invention claimed is: 1. A tire having a tread incorporating an elastomeric composition reinforced with an inorganic filler, said composition comprising: (i) a diene elastomer; (ii) as reinforcing inorganic filler, more than 80 phr of a silica having the following features: (a) a BET specific surface area of more than 70 and less than 130 m2/g; (b) an average particle size, dw, of between 30 and 300 nm; (iii) a coupling agent; and (iv) a vulcanization system comprising sulfur, a vulcanization accelerator and between 0.5 and 1.5 phr of zinc as vulcanization activator. 2. The tire according to claim 1, wherein the diene elastomer comprises at least 50 phr of a butadiene elastomer. 3. The tire according to claim 2, wherein the butadiene elastomer is selected from the group consisting of polybutadienes, styrene-butadiene copolymers and mixtures of these elastomers. 4. The tire according to claim 1, wherein the amount of silica is greater than 90 phr. 5. The tire according to claim 4, wherein the amount of silica is between 90 and 150 phr. 6. The tire according to claim 1, wherein the vulcanization accelerator is a sulfenamide accelerator and wherein the overall amount of sulfur and sulfenamide accelerator is between 1.25 and 2.75 phr. 7. The tire according to claim 6, wherein the overall amount of sulfur and sulfenamide accelerator is within a range from 1.5 to 2.5 phr. 8. The tire according to claim 1, wherein the vulcanization accelerator is a sulfenamide accelerator and the vulcanization system further comprises a guanidine derivative, and wherein the overall amount of sulfur, sulfenamide and guanidine derivative is within a range from 1.75 to 4.25 phr. 9. The tire according to claim 8, wherein the guanidine derivative is DPG (diphenylguanidine). 10. The tire according to claim 1, wherein zinc is supplied in the form of zinc oxide. 11. The tire according to claim 10, wherein zinc is supplied in the presence of a fatty acid. 12. The tire according to claim 11, wherein the fatty acid is stearic acid. 13. The tire according to claim 12, wherein the amount of stearic acid is of 0.5 to 3 phr. 14. The tire according to claim 1, wherein the quantity of zinc is within a range from 0.7 to 1.3 phr. 15. The tire according to claim 1, wherein the coupling agent is selected from the group consisting of polyfunctional silanes and polysiloxanes. 16. The tire according to claim 15, wherein the coupling agent is a polysulfurised alkoxysilane. 17. The tire according to claim 16, wherein the quantity of polysulfurised silane is less than 6 phr. 18. The tire according to claim 1, wherein the composition further comprises carbon black. 19. The tire according to claim 18, wherein the amount of carbon black is between 2 and 20 phr. 20. The tire according to claim 1, wherein the silica has the following features: a BET surface area of between 70 and 130 m2/g; a particle size dW of between 50 and 200 nm; a disagglomeration rate α greater than 5횞10-3 μm-1/min. 21. The tread according to claim 20, wherein the silica has the following features: a BET surface area within a range from 100 to 125 m2/g; a particle size dW within a range from 100 to 150 nm. 22. The tire according to claim 21, wherein the silica has the following feature: a disagglomeration rate α greater than 1횞10-2 μm-1/min.
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이 특허에 인용된 특허 (23)
Smith Richard Robinson (Cuyahoga Falls OH) Pyle Kevin James (Uniontown OH) Francik William Paul (Bath OH) Sandstrom Paul Harry (Tallmadge OH), Heterogeneous silica carbon black-filled rubber compound.
Musleve Richard Thomas (Akron OH) Parker Dane Kenton (Massillon OH) Hirst Robert Charles (Akron OH), Preparation of sulfur-containing organosilicon compounds.
Cohen Martin Paul (Fairlawn OH) Parker Dane Kenton (Massillon OH) Wideman Lawson Gibson (Tallmadge OH), Process for the preparation of organosilicon disulfide compounds.
Wideman Lawson Gibson (Tallmadge OH) Folk Theodore Lamson (Cuyahoga Falls OH) Cohen Martin Paul (Fairlawn OH), Process for the preparation of organosilicon polysulfide compounds.
Wideman Lawson Gibson (Tallmadge OH) Folk Theodore Lamson (Cuyahoga Falls OH) Cohen Martin Paul (Fairlawn OH), Process for the preparation of organosilicon polysulfide compounds.
Bomal Yves,FRX ; Chevallier Yvonick,FRX ; Prat Evelyne,FRX, Process for the preparation of precipitated silica, new precipitated silicas containing zinc and their use for the reinf.
Buder ; Wolfgang ; Pletka ; Hans-Dieter ; Michel ; Rudolf ; Schwarz ; Ru dolf ; Dusing ; Gerhard, Process for the production of sulfur containing organosilicon compounds.
Agostini Giorgio (Colmar-Berg LUX) Frank Uwe E. (Ettelbruck LUX) Materne Thierry F. E. (Attert BEX) Visel Friedrich (Bofferdange LUX) Zimmer ReneJ. (Howald LUX), Silica reinforced rubber composition and use in tires.
Agostini Giorgio (Colmar-Berg LUX) Frank Uwe Ernst (Ettelbruck LUX) Materne Thierry Florent Edme (Attert BEX) Visel Friedrich (Bofferdange LUX) Zimmer ReneJean (Howald LUX), Silica reinforced rubber composition and use in tires.
Sandstrom Paul H. (Tallmadge OH) Bauer Richard G. (Kent OH) Burlett Donald J. (Wadsworth OH) Sinsky Mark S. (Akron OH), Silica reinforced rubber composition field.
Meyer-Simon Eugen (Frankfurt DT) Schwarze Werner (Frankfurt DT) Thurn Friedrich (Grossauheim DT) Michel Rudolf (Somborn DT), Sulfur containing organosilicon compounds.
Backer, Michael Wolfgang; Gohndrone, John Michael; Kleyer, Don Lee; Zhou, Xiaobing, Ester-functional silanes and the preparation and use thereof; and use of iminium compounds as phase transfer catalysts.
Araujo da Silva, José; Favrot, Jean-Michel; Salit, Anne Frédérique; Seeboth, Nicolas, Rubber composition containing a modified elastomer, method for preparing same, and tire containing same.
Darnaud, Christelle; Longchambon, Karine, Tire comprising a composition essentially devoid of guanidine derivative and comprising an amino ether alcohol.
Darnaud, Christelle; Longchambon, Karine, Tire comprising a composition essentially free of guanidine derivative and comprising a hydroxyalkylpiperazine.
Darnaud, Christelle; Longchambon, Karine, Tire comprising a composition essentially free of guanidine derivative and comprising an alkali metal hydroxide or alkaline-earth metal hydroxide.
Vasseur, Didier; Lemerle, Frederic, Tire provided with a tread comprising a rubber composition including a thermoplastic resin of poly(methyl methacrylate).
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