Friction materials
US4310452A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 14, 1980 |
| Grant date | Jan 12, 1982 |
| Priority date | — |
| Expiry date | May 14, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D69/026
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The invention concerns a composition for a friction material e.g. for a brake pad, of the type containing a fibrous reinforcement, a binder and various additives. The composition contains a thermoset binder including a phenol-formaldehyde resin and making up 20 to 60% by volume of the material. Besides the resin the binder can also include a heat and chemical resistant rubber, but the phenol-formaldehyde resin makes up at least 10% by volume of the composition. The composition includes a fibre-based reinforcement which makes up 10 to 35% by volume of the material and consists of a mixture of steel fibres or glass fibres with one or more other non-asbestos inorganic reinforcing materials e.g. steel fibre and mica, or steel fibre and milled glass. The friction material contains no asbestos, but has properties comparable with asbestos-based materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.