Process for the production of thin coatings having optical and abrasion resistance properties
US5698266A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1997 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | Mar 25, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/40
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a process for the production of thin coatings having optical and abrasion resistance properties. The object of the invention is to produce optical thin coatings having good mechanical strength characteristics, i.e. a good resistance to abrasion and an adequate adhesion to the substrate on which they are deposited. This object is achieved with the aid of a process comprising at least one cycle constituted by stages consisting of: PA1 applying to a substrate (1) at least one antireflection sol-gel coating (3) constituted by a colloidal silicon oxide suspension dispersed in an aliphatic alcohol, PA1 allowing said antireflection coating (3) to dry, PA1 subjecting the substrate (1) covered with said colloidal silica coating (3) to an alkaline treatment in a liquid or gaseous medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.