Cured silicone rubber article having a protective coating layer
US5888656A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1996 |
| Grant date | Mar 30, 1999 |
| Priority date | — |
| Expiry date | Feb 13, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31598
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Proposed is a cured silicone rubber article such as a push button switch covering member having a protective coating layer of a urethane resin-based coating composition having excellent wear resistance against rubbing and capable of giving a dry and rigid touch feeling to the finger tip of the operator of the key tops. The coated silicone rubber article is obtained by subjecting a cured base body of a silicone rubber, prior to the coating with a urethane resin-based coating composition, first to a low temperature plasma treatment and then to a coating treatment with a specific primer composition which is a mixture of an epoxy group-containing organosilane compound and an amino group-containing organosilane compound in a molar mixing ratio in the range from 1:2 to 1:5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.