Overcoats for diazo-containing layers with chemicals and abrasion resistance
US5382495A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 1991 |
| Grant date | Jan 17, 1995 |
| Priority date | — |
| Expiry date | May 1, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/162
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
It has surprisingly been found that a protective coating composition for diazo-containing materials can be prepared from a cellulose ester, a hydroxylated resin, a crosslinking agent, microcrystalline silica and an acid catalyst. The coating compositions of the invention provide improved protection for diazo-containing materials from physical and chemical damage. The protective coating compositions of the invention are particularly effective for protecting the diazo-containing materials from chemical attack from solvents. The invention further relates to photographic elements and phototools provided with the protective coating composition and a method for providing the coating composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.