Photographic polypropylene coated paper support with corona discharge treatment and polymeric subbing layer
US4220471A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1978 |
| Grant date | Sep 2, 1980 |
| Priority date | — |
| Expiry date | Oct 4, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/138
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photographic material comprising a support having on the surface a polypropylene resin component and a hydrophilic colloidal layer on the top surface which are firmly adhered together, is produced by subjecting the support having on the surface a polypropylene resin component to corona discharge, applying thereto a subbing layer comprising (a) at least one water-dispersed polymer latex selected from butadiene-acrylic ester copolymers, polyvinyl chloride and polystyrene, (b) a compound having an ethyleneimino group such as that capable of hardening a colloidal gelatin or casein, and (c) a water-soluble polymer, and providing a hydrophilic protective colloidal layer on said subbing layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.