GB714088A - Improvements in or relating to methods of applying protective layers to reflecting metal surfaces - Google Patents
Improvements in or relating to methods of applying protective layers to reflecting metal surfacesInfo
- Publication number
- GB714088A GB714088A GB28157/51A GB2815751A GB714088A GB 714088 A GB714088 A GB 714088A GB 28157/51 A GB28157/51 A GB 28157/51A GB 2815751 A GB2815751 A GB 2815751A GB 714088 A GB714088 A GB 714088A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lacquer
- layer
- supporting
- hardened
- mixture
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
Landscapes
- Laminated Bodies (AREA)
- Optical Elements Other Than Lenses (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
A protective layer is formed on a reflecting metal surface formed on a thermosetting layer of lacquer which has been hardened by heating, by covering the metal surface with a layer of a thermosetting lacquer which is subsequently hardened at a temperature at least 15 DEG C. lower than that at which the supporting layer of lacquer was hardened. A preferred reflecting surface is a layer of aluminium applied to the supporting layer of lacquer by vaporization in a vacuum. Preferably the same lacquer is used for supporting and protecting the metal surface; a specified lacquer is a mixture of a urea formaldehyde condensation product and a non-drying alkyd resin, this mixture being applied to the metal layer as a solution in xylol-butanol. The coating may be applied to the reflecting surface, which is subsequently rotated rapidly, or it may be sprayed thereon. In an example, provided on a plate having a part-spherical surface, the supporting lacquer is muffled at 150 DEG C. and the aluminium mirror supported on this is coated with a solution of "Paralac (Registered Trade Mark) 6001," a urea formaldehyde condensation product, and "Sigmol 706," a non-drying alkyd resin, in a xylol-butanol mixture having a viscosity 9 to 9.5 degrees Engler at 20 DEG C. by application of a small quantity of the solution to the mirror with subsequent rapid rotation of the latter. The coating is then dried at 60 DEG C. for 20 minutes and then muffled at 115 DEG C. for more than 1 1/2 hours.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL714088X | 1950-12-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB714088A true GB714088A (en) | 1954-08-25 |
Family
ID=19814896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28157/51A Expired GB714088A (en) | 1950-12-05 | 1951-11-30 | Improvements in or relating to methods of applying protective layers to reflecting metal surfaces |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB714088A (en) |
-
1951
- 1951-11-30 GB GB28157/51A patent/GB714088A/en not_active Expired
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