Backing layer for motion picture film
US5910399A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 1998 |
| Grant date | Jun 8, 1999 |
| Priority date | — |
| Expiry date | Jun 4, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/162
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention is a motion picture film which includes a support having, in order, on one side thereof an antihalation undercoat and at least one silver halide emulsion layer and having, in order, on the opposite side thereof an antistatic layer and a protective overcoat. The protective overcoat includes a polyurethane binder having a tensile elongation to break of at least 50% and a Young's modulus measured at a 2% elongation of at least 50000 lb/in.sup.2, and a topcoat farthest from the support. The topcoat is formed by the coating and subsequent drying of a coating composition comprising gelatin-grafted polyurethane comprising gelatin covalently bound to a polyurethane through a grafting agent, wherein the ratio of gelatin to polyurethane is from 1:10 to 2:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.