Magnetic recording medium having a binder composition comprising phosphonated polyurethane and a vinyl chloride copolymer with ammonium functionalities
US5491029A · kind A · utility
13Cited by
21References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1994 |
| Grant date | Feb 13, 1996 |
| Priority date | — |
| Expiry date | Sep 16, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31935
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A binder composition suitable for use with magnetic media comprising: PA1 (i) a phosphonated polyurethane having a plurality of units of the formula: ##STR1## wherein: the nitrogen atom forms part of the backbone chain of the polymer, and PA2 R.sup.1 and R.sup.2 independently represent members selected from the group consisting of alkyl groups of 1 to 5 carbon atoms, cycloalkyl groups and aryl groups of 6 to 10 carbon atoms or together R.sup.1 and R.sup.2 comprise the necessary carbon atoms to complete a ring, and PA1 (ii) a vinyl chloride copolymer having pendant ammonium functionalities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.