Back to results
US 6,887,549 B2Granted
Friction material
AssigneeNisshinbo Industries, Inc.
InventorsSeiji Suzuki, Yasuki Hattori, Kazuhide Yamamoto
Life of this patent
Estimating the term…
Abstract
A friction material obtainable by molding and curing a material composition having a fibrous base, a binder, and a filler, wherein an amount of sulfate ions extracted from the friction material measured in accordance with JIS K 0127 is about 0.2 mg/g or smaller and the pH of the friction material is about 10.0 or higher and less than about 13.0.
Claims13
A friction material obtainable by molding and curing a material composition comprising:
- a fibrous base;
- a binder;
- and
- a filler,
- wherein an amount of sulfate ions extracted from the friction material measured in accordance with JIS K 0127 is about 0.2 mg/g or smaller and the pH of the friction material is about 10.0 or higher and less than about 13.0.
2 more elements
A friction material obtainable by molding and curing a composition comprising:
- a fibrous base;
- a binder;
- and
- a filler,
- wherein the filler comprises two or more kinds of sulfides, wherein the content of the sulfides having sulfate ions extracted therefrom measured in accordance with JIS K 0127 in an amount of about 10 mg/g or smaller and having a pH of about 4.0 or higher is 80% by volume or more based on the total volume of said two or more kinds of sulfides, and wherein the total amount of the sulfides is from about 0.1 to 9% by volume based on the total volume of the friction material composition.
2 more elements
A friction material obtainable by molding and curing a composition comprising:
- a fibrous base;
- a binder;
- and
- a filler,
- wherein the filler comprises one or more sulfides having sulfate ions extracted from the friction material measured in accordance with JIS K 0127 in an amount of about 10 mg/g or smaller and having a pH of about 4.0 or higher, and wherein the total amount of the one or more sulfides is from about 0.1 to 9% by volume base on the total volume of the friction material composition.
2 more elements
Dependencies are inferred from the claim text.