CA2081341A1 - Lead free mirrors and environmentally safe manufacture thereof - Google Patents
Lead free mirrors and environmentally safe manufacture thereofInfo
- Publication number
- CA2081341A1 CA2081341A1 CA2081341A CA2081341A CA2081341A1 CA 2081341 A1 CA2081341 A1 CA 2081341A1 CA 2081341 A CA2081341 A CA 2081341A CA 2081341 A CA2081341 A CA 2081341A CA 2081341 A1 CA2081341 A1 CA 2081341A1
- Authority
- CA
- Canada
- Prior art keywords
- layer
- reflective
- zinc
- barrier layer
- sputtered
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
Mirrors are formed in an environmentally compatible and substantially pollution-free manner by a sputtering process in which a transparent substrate (10) such as glass has first sputtered upon it a primer layer (12) and then a reflective layer (14) of silver or other bright reflective metal. A barrier layer (16) is provided over the reflective layer (14) to protect the latter from corrosive environments. If the transmittance of the reflective layer (14) is greater than zero percent, the barrier layer (16) includes a different bright reflective metal sufficient to reduce the transmittance of the combined reflective and barrier layers to zero percent.
The mirror includes a lead-free polymeric protective layer (22) spaced further from the transparent substrate than the barrier layer. The inclusion of zinc pigment in the polymeric coating (26) provides sulfiding protection, and the use of an outer sputtered on film of zinc (24) or zinc oxide (24) provides substantial adhesion thereto of the polymeric coating (26).
The mirror includes a lead-free polymeric protective layer (22) spaced further from the transparent substrate than the barrier layer. The inclusion of zinc pigment in the polymeric coating (26) provides sulfiding protection, and the use of an outer sputtered on film of zinc (24) or zinc oxide (24) provides substantial adhesion thereto of the polymeric coating (26).
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US51410990A | 1990-04-25 | 1990-04-25 | |
| US514,109 | 1990-04-25 | ||
| US68601191A | 1991-04-12 | 1991-04-12 | |
| US686,011 | 1991-04-12 | ||
| PCT/US1991/002811 WO1991016197A1 (en) | 1990-04-25 | 1991-04-24 | Lead-free mirrors and environmentally safe manufacture thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2081341A1 true CA2081341A1 (en) | 1991-10-26 |
| CA2081341C CA2081341C (en) | 1999-06-15 |
Family
ID=27058100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002081341A Expired - Lifetime CA2081341C (en) | 1990-04-25 | 1991-04-24 | Lead free mirrors and environmentally safe manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2081341C (en) |
-
1991
- 1991-04-24 CA CA002081341A patent/CA2081341C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2081341C (en) | 1999-06-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |