Composite polyester films as final coating supports
US5128206A · kind A · utility
12Cited by
3References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 1, 1990 |
| Grant date | Jul 7, 1992 |
| Priority date | — |
| Expiry date | Nov 1, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31797
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to orientated composite polyester films carrying, on at least one face, a coating intended to improve the slip properties, consisting of a graft polymer comprising a backbone derived from a polyester containing sulphonyloxy groups and grafts of polymer units derived from at least one ethylenically unsaturated monomer and at least one ethylenically unsaturated organosiloxane. The composite polyester films according to the invention are very particularly suitable for the production of magnetic tapes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.